/* File này chứa style dùng chung cho home, trang thi và trang kết quả của student portal. */
:root {
  --bg: #f7f9f9;
  --surface: #ffffff;
  --surface-soft: #f7faf9;
  --line: #dbe4e6;
  --text: #17233b;
  --text-2: #465568;
  --muted: #5d6c7e;
  --primary: #0f766e;
  --primary-soft: #e7f5f2;
  --success: #08735a;
  --success-bg: #eef9f5;
  --danger: #c2413b;
  --danger-bg: #fff5f4;
  --warning: #a85f09;
  --warning-bg: #fff8e8;
  --shadow-sm: 0 8px 22px rgba(28, 43, 60, 0.055);
  --shadow-xs: 0 2px 8px rgba(28, 43, 60, 0.045);
  --shadow-md: 0 18px 44px rgba(15, 27, 46, 0.16);
  --radius: 8px;
  --radius-sm: 6px;
  --r: 8px;
  --r-sm: 6px;
  --surface-subtle: #f7faf9;
  --primary-light: #e7f5f2;
  --primary-dark: #0b625c;
  --danger-border: #fecaca;
  --t: 160ms ease;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

body.home-page,
body.student-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.render-stage {
  position: fixed;
  inset: 0;
  z-index: 1400;
  display: grid;
  place-items: center;
  padding: 24px;
  transition: opacity 220ms ease, visibility 220ms ease;
}

.render-stage-card {
  display: grid;
  justify-items: center;
  gap: 10px;
  min-width: 220px;
  padding: 18px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.render-stage-title {
  margin: 0;
  color: var(--text);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.01em;
}

.render-stage-dots {
  display: inline-flex;
  gap: 8px;
}

.render-stage-dots span {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--primary);
  animation: render-dot-bounce 0.9s ease-in-out infinite;
}

.render-stage-dots span:nth-child(2) {
  animation-delay: 0.12s;
}

.render-stage-dots span:nth-child(3) {
  animation-delay: 0.24s;
}

.render-ready .render-stage {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

@keyframes render-dot-bounce {
  0%, 80%, 100% {
    transform: translateY(0);
    opacity: 0.45;
  }
  40% {
    transform: translateY(-5px);
    opacity: 1;
  }
}

.student-shell {
  width: min(1080px, calc(100% - 48px));
  margin: 0 auto;
  padding: 34px 0 60px;
  flex: 1 0 auto;
}

.student-shell-wide {
  width: min(1560px, calc(100% - 48px));
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.student-heading {
  margin-bottom: 18px;
}

.student-heading h1,
.take-heading h1 {
  margin: 0;
  color: var(--text);
  font-size: 28px;
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: 0;
}

.take-heading {
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  text-align: center;
}

.take-heading h1 {
  max-width: 1120px;
  margin: 0 auto;
  font-size: 22px;
  line-height: 1.32;
}

.take-heading h1.is-long {
  font-size: 19px;
  line-height: 1.36;
}

.take-heading h1.is-very-long {
  font-size: 17px;
  line-height: 1.38;
}

.take-heading-facts,
.exam-facts {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  max-width: 100%;
  gap: 6px;
  margin-top: 10px;
  color: var(--text-2);
}

.take-heading-facts span,
.exam-facts span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  min-width: 40px;
  min-height: 26px;
  padding: 0 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
  color: var(--text);
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
}

.account-chip {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid #dbe7f4;
  border-radius: 999px;
  background: #fff;
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
}

.exam-list {
  display: grid;
  gap: 8px;
}

.exam-row {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 60px;
  padding: 12px 14px 12px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.exam-row-main {
  min-width: 0;
  flex: 1;
}

.exam-row h2 {
  margin: 0;
  overflow-wrap: anywhere;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.42;
}

.icon-button,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.icon-button {
  width: 38px;
}

.button {
  padding: 0 14px;
}

.primary,
.button-primary {
  border-color: var(--primary-dark);
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 7px rgba(15, 118, 110, 0.16);
}

.button-muted {
  border-color: var(--line);
  background: #f8fafb;
  color: var(--text-2);
}

.empty-state {
  padding: 18px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  color: var(--text-2);
  background: var(--surface);
}

.take-mobile-toolbar,
.take-mobile-nav-heading,
.take-mobile-nav-overlay {
  display: none;
}

.take-layout {
  display: grid;
  min-width: 0;
  max-width: 100%;
  grid-template-columns: 252px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.take-nav {
  min-width: 0;
  position: sticky;
  top: 18px;
  max-height: none;
  overflow: visible;
}

.take-nav-inner,
.take-question-card,
.context-block,
.toeic-directions-card,
.question-card,
.result-hero {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.take-nav-inner {
  min-width: 0;
  display: grid;
  gap: 14px;
  padding: 16px 14px;
}

.take-timer-compact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 12px;
  border: 1px solid #c7ddf7;
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
}

.take-timer-compact span,
.participant-field span {
  color: var(--text-2);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}

.take-timer-compact strong {
  color: var(--primary);
  font-size: 20px;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.take-timer-compact.is-warning {
  border-color: #fde68a;
  background: var(--warning-bg);
}

.take-timer-compact.is-danger {
  border-color: #fecaca;
  background: var(--danger-bg);
}

.take-timer-compact.is-danger strong {
  color: var(--danger);
}

.participant-field {
  display: grid;
  gap: 6px;
}

.take-signed-in-name {
  display: grid;
  gap: 4px;
}

.take-signed-in-name strong {
  color: var(--text);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.45;
}

.participant-field input,
.take-text-answer input {
  width: 100%;
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  color: var(--text);
  font: inherit;
}

.turnstile-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.turnstile-wrap-compact {
  padding-top: 2px;
}

.turnstile-wrap.needs-attention {
  padding: 9px;
  border: 1px solid #d7a64c;
  border-radius: var(--radius-sm);
  background: var(--warning-bg);
}

.turnstile-submit-note {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  width: 100%;
  margin: 0;
  color: #765817;
  font-size: 0.72rem;
  font-weight: 650;
  line-height: 1.4;
}

.turnstile-submit-note[hidden] {
  display: none;
}

.take-submit-modal {
  position: fixed;
  inset: 0;
  z-index: 1250;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
  background: rgba(15, 23, 42, 0.5);
}

.take-submit-modal[hidden] {
  display: none;
}

.take-submit-dialog {
  width: min(460px, 94vw);
  border: 1px solid #c7ddf7;
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: var(--shadow-md);
  padding: 18px;
}

.take-submit-dialog h2 {
  margin: 0 0 8px;
  color: var(--text);
  font-size: 18px;
  line-height: 1.35;
}

.take-submit-dialog p {
  margin: 0;
  color: var(--text-2);
  line-height: 1.6;
}

.take-submit-missing {
  margin-top: 12px;
  max-height: 150px;
  overflow: auto;
  padding: 10px 12px;
  border: 1px solid #dbe7f4;
  border-radius: var(--radius-sm);
  background: #f7fbff;
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.6;
}

.take-submit-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 16px;
}

.take-nav-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 8px;
}

.nav-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--text);
  font-size: 11px;
  font-weight: 700;
}

.nav-legend-item::before {
  content: "";
  width: 10px;
  height: 10px;
  border: 1.5px solid currentColor;
  border-radius: 3px;
}

.nav-legend-answered::before {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--primary);
}

.nav-legend-flagged::before {
  background: #fef3c7;
  border-color: #f59e0b;
  color: #f59e0b;
}

.take-nav-grid {
  display: grid;
  width: 100%;
  min-width: 0;
  grid-template-columns: repeat(auto-fit, minmax(38px, 1fr));
  justify-content: stretch;
  gap: 6px;
}

@media (min-width: 761px) {
  .take-nav {
    max-height: calc(100vh - 36px);
    overflow-y: auto;
    scrollbar-width: thin;
  }

  /* Sidebar desktop chỉ nên ôm gọn 5 ô mỗi hàng trong bề ngang hiện tại,
     tránh việc grid nở nhẹ ra rồi tạo cảm giác tràn/scrollbar trong khối điều hướng. */
  .take-nav-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

.nav-q-box {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 32px;
  padding: 0;
  border: 1.5px solid var(--line);
  border-radius: 5px;
  background: var(--surface);
  color: var(--text);
  font-size: 11px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
}

.nav-q-box.is-answered {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

.nav-q-box.is-flagged {
  border-color: #f59e0b;
  border-width: 2px;
}

.nav-q-box.is-flagged:not(.is-answered) {
  background: #fef3c7;
  color: #92400e;
}

.nav-q-box.is-flagged::after {
  content: "";
  position: absolute;
  top: 3px;
  right: 3px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #f59e0b;
}

.take-submit-btn {
  width: 100%;
}

.take-main,
.take-questions,
.question-preview {
  display: grid;
  min-width: 0;
  max-width: 100%;
  gap: 16px;
}

.take-questions {
  gap: 20px;
}

.take-question-card {
  min-width: 0;
  max-width: 100%;
  overflow: hidden;
  scroll-margin-top: 70px;
}

.take-q-header {
  padding: 18px 22px 14px;
  background: var(--surface);
}

.take-q-body {
  flex: 1;
  min-width: 0;
}

.take-q-toolbar {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;
  margin-bottom: 8px;
}

.take-q-actions {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  margin-left: auto;
}

.result-q-toolbar .take-q-text {
  flex: 1 1 auto;
  min-width: 0;
  max-width: 100%;
}

.take-q-number {
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.4;
}

.take-q-text {
  margin: 0;
  color: var(--text);
  /* Câu hỏi vẫn cần nổi hơn đáp án, nhưng chỉ hơn rất nhẹ để tránh cảm giác chữ "phình" quá mức. */
  font-size: 15px;
  font-weight: 500;
  line-height: 1.66;
  overflow-wrap: break-word;
  white-space: normal;
}

.take-q-text strong {
  font-weight: 700;
  margin-right: 6px;
}

.mark-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border: 1.5px solid var(--line);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.mark-btn.is-flagged {
  border-color: #f59e0b;
  background: #fef3c7;
  color: #b45309;
}

.take-question-card.is-flagged {
  border-color: #f59e0b;
  box-shadow: 0 0 0 2px #fde68a, var(--shadow-sm);
}

.take-hint {
  display: inline-flex;
  margin-top: 8px;
  padding: 2px 9px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
}

.take-choices {
  display: grid;
  gap: 8px;
  padding: 0 22px 20px;
}

.choice-row {
  display: flex;
  /* Căn theo cùng trục ngang để radio, nhãn A/B/C/D và text nhìn thẳng hàng. */
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  cursor: pointer;
}

.choice-row.is-selected {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.choice-row input {
  margin-top: 0;
  align-self: center;
  accent-color: var(--primary);
}

.choice-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  border: 1px solid #bfd6f6;
  border-radius: 999px;
  background: #edf5ff;
  color: var(--primary-dark);
  font-size: 14px;
  font-weight: 700;
}

.choice-text {
  flex: 1;
  min-width: 0;
  color: inherit;
  font-size: 15px;
  line-height: 1.66;
  overflow-wrap: break-word;
  white-space: normal;
}

.toeic-part-one-choices {
  grid-template-columns: repeat(4, minmax(58px, 1fr));
  max-width: 520px;
}

.toeic-part-one-choices .choice-row {
  justify-content: center;
  min-height: 48px;
  padding: 8px;
}

.toeic-part-one-choices .choice-text:empty {
  display: none;
}

.true-false-row {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr) auto;
  align-items: center;
}

.tf-choice-controls {
  display: inline-flex;
  gap: 8px;
}

.tf-choice-controls label {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-height: 32px;
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  font-size: 13px;
  font-weight: 700;
}

.take-text-answer {
  display: grid;
  gap: 8px;
  padding: 0 22px 20px;
  color: var(--text-2);
  font-size: 13px;
  font-weight: 700;
}

.proof-taking-note {
  margin: 0 22px 20px;
  padding: 10px 12px;
  border: 1px solid #fde68a;
  border-radius: var(--radius-sm);
  background: var(--warning-bg);
  color: #92400e;
  font-size: 13px;
  font-weight: 700;
}

.context-block {
  min-width: 0;
  max-width: 100%;
  padding: 14px 18px;
  border-left: 4px solid var(--primary);
  background: var(--primary-soft);
  scroll-margin-top: 70px;
}

.exam-reference-card {
  min-width: 0;
  max-width: 100%;
  padding: 15px 18px;
  border: 1px solid #b8ddd5;
  border-radius: var(--radius-sm);
  background: #f3faf8;
  color: var(--text);
}

.exam-reference-card header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  color: #116b63;
  font-size: 13px;
}

.exam-reference-content {
  min-width: 0;
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.65;
  overflow-wrap: anywhere;
}

.exam-reference-content mjx-container {
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
}

.toeic-easy-note {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border: 1px solid #bfdbfe;
  border-radius: var(--radius-sm);
  background: #eff6ff;
  color: #15385f;
  margin-bottom: 18px;
}

.toeic-easy-note i {
  font-size: 22px;
}

.toeic-easy-note div,
.toeic-audio-player {
  display: grid;
  gap: 6px;
}

.toeic-easy-note span,
.toeic-audio-player > span {
  color: var(--text-2);
  font-size: 12px;
  font-weight: 700;
}

.toeic-mock-player {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
  padding: 14px 16px;
  border: 1px solid #a7d7c5;
  border-radius: var(--radius-sm);
  background: #f0fdf7;
  color: #164e3d;
}

.toeic-mock-player-main,
.toeic-mock-player-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.toeic-mock-player-main > i {
  font-size: 23px;
}

.toeic-mock-player-main > div {
  display: grid;
  gap: 3px;
}

.toeic-mock-player-main span {
  color: #3e6256;
  font-size: 12px;
  font-weight: 700;
}

.toeic-mock-clock {
  white-space: nowrap;
  font-size: 13px;
  font-weight: 700;
}

.toeic-audio-player {
  margin: 10px 0;
}

.toeic-audio-player audio {
  width: min(100%, 420px);
}

.toeic-question-audio {
  padding: 0;
}

.toeic-directions-card {
  padding: 16px 18px;
  border-left: 4px solid #7daee8;
  background: #f8fbff;
}

.toeic-card-heading {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.toeic-card-heading i {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: #e5f0ff;
  color: var(--primary-dark);
  font-size: 17px;
}

.toeic-card-heading div {
  display: grid;
  gap: 2px;
}

.toeic-card-heading span,
.toeic-context-heading span {
  color: var(--primary);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}

.toeic-card-heading strong,
.toeic-context-heading strong {
  color: var(--text);
  font-size: 14px;
  line-height: 1.4;
}

.toeic-direction-text {
  margin: 4px 0 10px;
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.65;
}

.toeic-context-card {
  border-left-color: var(--primary);
  background: var(--surface);
}

.toeic-inline-context {
  margin-top: 8px;
}

.toeic-listening-end-card {
  border-left-color: #16a34a;
  background: #f0fdf4;
}

.toeic-graphic {
  margin-top: 14px;
}

.toeic-graphic-title {
  margin: 0 0 8px;
  color: var(--text);
  font-size: 15px;
  font-weight: 700;
  text-align: center;
}

.toeic-graphic-note {
  margin: 7px 0 0;
  color: var(--text-2);
  font-size: 12px;
  font-style: italic;
}

.toeic-part-switcher {
  display: grid;
  gap: 8px;
}

.toeic-part-list {
  display: grid;
  gap: 5px;
}

.toeic-part-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  width: 100%;
  min-height: 48px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  text-align: left;
  cursor: pointer;
}

.toeic-part-button > span:first-child {
  display: grid;
  gap: 1px;
}

.toeic-part-button strong {
  font-size: 13px;
}

.toeic-part-button small {
  color: var(--text-2);
  font-size: 11px;
}

.toeic-part-button:hover {
  border-color: #93c5fd;
  background: #f8fbff;
}

.toeic-part-button.active {
  border-color: var(--primary);
  background: var(--primary-soft);
  color: var(--primary-dark);
  cursor: default;
}

.toeic-part-button.is-locked {
  color: var(--text-2);
  cursor: not-allowed;
  opacity: 0.68;
}

.toeic-part-progress {
  flex: 0 0 auto;
  color: var(--text-2);
  font-size: 11px;
  font-weight: 700;
}

.toeic-part-footer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  padding-top: 8px;
}

.toeic-part-footer > :last-child {
  justify-self: end;
}

.toeic-part-footer > strong {
  color: var(--text-2);
  font-size: 13px;
}

.context-instruction {
  max-width: 100%;
  margin-bottom: 10px;
  color: #15385f;
  font-size: 15px;
  font-style: italic;
  font-weight: 700;
  line-height: 1.6;
  overflow-wrap: anywhere;
  white-space: pre-line;
}

.context-passage {
  max-width: 100%;
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.68;
  text-align: justify;
  text-justify: inter-word;
  overflow-wrap: anywhere;
  white-space: pre-line;
}

.question-image,
.question-image-wrap,
.choice-image {
  margin: 12px 22px 18px;
}

.question-image img,
.question-image-wrap img,
.choice-image,
.explanation-image {
  display: block;
  max-width: min(100%, 720px);
  max-height: 460px;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
  object-fit: contain;
}

.question-image img,
.question-image-wrap img,
.choice-image,
.explanation-image {
  cursor: zoom-in;
}

.question-image-viewer {
  width: min(94vw, 1120px);
  max-width: none;
  height: min(92vh, 900px);
  padding: 44px 12px 12px;
  border: 0;
  border-radius: var(--radius-sm);
  background: #fff;
}

.question-image-viewer::backdrop {
  background: rgba(13, 23, 38, 0.82);
}

.question-image-viewer img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.question-image-viewer button {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--text);
  cursor: pointer;
}

.result-hero {
  margin-bottom: 20px;
  padding: 38px 28px 32px;
  text-align: center;
}

.result-heading {
  margin-bottom: 20px;
}

.result-layout {
  align-items: start;
}

.result-nav {
  top: 18px;
}

.result-nav-inner {
  gap: 12px;
}

.result-summary-card {
  display: grid;
  gap: 8px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #f8fbff 0%, #ffffff 100%);
}

.toeic-score-total {
  display: flex;
  align-items: baseline;
  gap: 5px;
  padding: 4px 0 7px;
  color: var(--primary-dark);
}

.toeic-score-total strong {
  font-size: 1.9rem;
  line-height: 1;
}

.toeic-score-total span {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
}

.toeic-score-table-wrap {
  overflow-x: auto;
}

.toeic-score-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.73rem;
}

.toeic-score-table th,
.toeic-score-table td {
  padding: 7px 5px;
  border-bottom: 1px solid #dfe9f4;
  text-align: right;
  white-space: nowrap;
}

.toeic-score-table th:first-child {
  text-align: left;
}

.toeic-score-table thead th {
  color: var(--muted);
  font-size: 0.67rem;
  font-weight: 700;
}

.toeic-score-table tbody th,
.toeic-score-table tbody td:last-child {
  color: var(--text);
  font-weight: 700;
}

.toeic-score-table .is-total th,
.toeic-score-table .is-total td {
  border-bottom: 0;
  color: var(--primary-dark);
}

.toeic-result-part-panel {
  display: grid;
  gap: 12px;
  padding: 14px;
  border: 1px solid #cfdef0;
  border-radius: var(--radius);
  background: #f8fbff;
}

.result-section-heading p {
  margin: 0;
}

.toeic-result-part-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 12px;
}

.toeic-result-part-heading p,
.toeic-result-part-heading h2 {
  margin: 0;
}

.toeic-result-part-heading h2 {
  margin-top: 2px;
  font-size: 1rem;
}

.toeic-result-part-heading > span {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 700;
}

.toeic-result-part-tabs {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 6px;
}

.toeic-result-part-tab {
  display: grid;
  justify-items: center;
  gap: 2px;
  min-height: 46px;
  padding: 6px 4px;
  border: 1px solid #d5e3f2;
  border-radius: 7px;
  background: #fff;
  color: var(--text);
  font-size: 0.7rem;
  text-decoration: none;
}

.toeic-result-part-tab span {
  color: var(--muted);
  font-size: 0.66rem;
}

.toeic-result-part-tab.active {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary-dark);
}

.toeic-result-part-tab.active span {
  color: var(--primary-dark);
}

.result-nav-progress {
  display: grid;
  gap: 10px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.result-main {
  display: grid;
  gap: 16px;
}

.result-questions {
  display: grid;
  gap: 16px;
}

.result-question-card {
  overflow: hidden;
}

.result-answer-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 28px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
}

.result-answer-badge.is-correct {
  background: var(--success-bg);
  color: var(--success);
}

.result-answer-badge.is-wrong {
  background: var(--danger-bg);
  color: var(--danger);
}

.result-answer-badge.is-empty {
  background: #eef6ff;
  color: var(--primary-dark);
}

.result-answer-badge.is-correct-soft {
  background: #eef6ff;
  color: var(--primary-dark);
}

.result-choice-row {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) auto;
  align-items: center;
  column-gap: 12px;
  row-gap: 8px;
}

.result-choice-row.is-review-correct {
  border-color: #bbf7d0;
  background: var(--success-bg);
}

.result-choice-row.is-review-wrong {
  border-color: #fecaca;
  background: #fff6f6;
}

.result-choice-row.is-review-empty {
  border-color: #c7ddf7;
  background: #f4f9ff;
}

.result-choice-body {
  display: grid;
  gap: 8px;
  min-width: 0;
}

.result-choice-text {
  min-width: 0;
}

.result-choice-row .choice-label,
.result-answer-badge,
.result-answer-badge.is-correct-soft {
  align-self: center;
}

.result-answer-badge,
.result-answer-badge.is-correct-soft {
  justify-self: end;
  white-space: nowrap;
}

.result-choice-row .choice-image {
  margin: 0;
}

.result-text-answer {
  padding-top: 4px;
}

.result-text-box {
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
  color: var(--text);
  line-height: 1.6;
}

.result-explanation {
  margin: 0 22px 20px;
  border-color: #bbf7d0;
  border-left: 4px solid var(--success);
  background: linear-gradient(180deg, #f2fff7 0%, #e8faef 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.78);
}

.result-explanation > strong {
  display: block;
  margin-bottom: 6px;
  color: #166534;
}

.explanation-markup strong {
  display: inline;
  margin: 0;
  color: inherit;
}

.result-lock-panel {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.result-hero h1 {
  margin: 0;
  color: var(--primary);
  font-size: 42px;
  line-height: 1;
}

.result-summary-line {
  margin: 0;
  color: var(--text-2);
  font-size: 0.95rem;
  line-height: 1.6;
}

.result-summary-line span {
  color: var(--muted);
  font-weight: 600;
}

/* Search stays deliberately small: one input, light filters and scan-friendly rows. */
.app-header-search {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 36px;
  padding: 0 11px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.07);
  color: #f8fafc;
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  transition: background var(--t), border-color var(--t);
}

.app-header-search:hover,
.app-header-search:focus-visible {
  border-color: rgba(255, 255, 255, 0.42);
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
}

.search-shell {
  width: min(1040px, calc(100% - 40px));
  flex: 1 0 auto;
}

.search-heading {
  margin: 4px 0 16px;
}

.search-heading h1 {
  margin: 0;
  color: var(--text);
  font-size: 1.7rem;
  line-height: 1.3;
}

.search-workspace {
  position: relative;
  z-index: 4;
  margin-bottom: 28px;
}

.search-form {
  position: relative;
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr) 40px;
  align-items: center;
  gap: 9px;
  min-height: 58px;
  padding: 7px 8px 7px 17px;
  border: 1px solid #cbd9dc;
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.search-form:focus-within {
  border-color: #6abbb3;
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.1);
}

.search-form > i {
  color: var(--primary);
  font-size: 1.05rem;
}

.search-form input {
  width: 100%;
  min-width: 0;
  height: 42px;
  padding: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 1rem;
}

.search-form input::placeholder {
  color: #7a8795;
}

.search-form > button {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 0;
  border-radius: var(--radius-sm);
  background: var(--primary);
  color: #fff;
  cursor: pointer;
}

.search-form > button:hover,
.search-form > button:focus-visible {
  background: var(--primary-dark);
}

.search-suggestions {
  position: absolute;
  top: calc(100% + 7px);
  left: 0;
  right: 0;
  z-index: 30;
  overflow: hidden;
  border: 1px solid #cedbdd;
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 18px 40px rgba(15, 27, 46, 0.16);
}

.search-suggestions a {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  min-height: 54px;
  padding: 9px 14px;
  border-bottom: 1px solid #edf1f2;
  color: var(--text);
  text-decoration: none;
}

.search-suggestions a:last-child {
  border-bottom: 0;
}

.search-suggestions a:hover,
.search-suggestions a.is-active {
  background: var(--primary-soft);
}

.search-suggestions a > i {
  color: var(--primary);
  text-align: center;
}

.search-suggestions a span,
.search-suggestions a strong,
.search-suggestions a small {
  display: block;
  min-width: 0;
}

.search-suggestions a strong {
  overflow: hidden;
  font-size: 0.88rem;
  line-height: 1.35;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.search-suggestions a small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.72rem;
}

.search-filters {
  display: flex;
  gap: 5px;
  overflow-x: auto;
  margin-top: 10px;
  padding-bottom: 2px;
  scrollbar-width: none;
}

.search-filters::-webkit-scrollbar {
  display: none;
}

.search-filters a {
  flex: 0 0 auto;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  color: var(--text-2);
  font-size: 0.78rem;
  font-weight: 600;
  text-decoration: none;
}

.search-filters a:hover,
.search-filters a.is-active {
  background: var(--primary-soft);
  color: var(--primary-dark);
}

.search-result-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 10px;
}

.search-result-heading h2 {
  margin: 0;
  font-size: 1rem;
}

.search-result-heading span {
  color: var(--muted);
  font-size: 0.78rem;
}

.search-results {
  display: grid;
  gap: 7px;
}

.search-result {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) auto;
  align-items: center;
  gap: 13px;
  min-height: 84px;
  padding: 13px 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
  transition: border-color var(--t), box-shadow var(--t), transform var(--t);
}

.search-result:hover,
.search-result:focus-visible {
  border-color: #93c9c3;
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.search-result-icon {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: var(--primary-soft);
  color: var(--primary);
}

.search-result-body,
.search-result-kicker,
.search-result-body > strong,
.search-result-summary {
  display: block;
  min-width: 0;
}

.search-result-kicker {
  margin-bottom: 3px;
  color: var(--primary-dark);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
}

.search-result-kicker small {
  margin-left: 8px;
  color: var(--muted);
  font-size: inherit;
  font-weight: 600;
  text-transform: none;
}

.search-result-body > strong {
  font-size: 0.92rem;
  line-height: 1.4;
}

.search-result-summary {
  display: -webkit-box;
  overflow: hidden;
  margin-top: 3px;
  color: var(--text-2);
  font-size: 0.78rem;
  line-height: 1.45;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 1;
}

.search-result-side {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #8a98a6;
}

.search-result-side small {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 7px;
  border-radius: var(--radius-sm);
  background: #f1f5f4;
  color: var(--text-2);
  font-size: 0.68rem;
  font-weight: 600;
}

.search-starters {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.search-starters a {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 72px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
}

.search-starters i {
  color: var(--primary);
  font-size: 1.1rem;
}

.search-starters span,
.search-starters strong,
.search-starters small {
  display: block;
}

.search-starters strong {
  font-size: 0.84rem;
}

.search-starters small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.7rem;
}

.search-empty {
  display: grid;
  justify-items: center;
  padding: 48px 20px;
  text-align: center;
}

.search-empty > i {
  color: var(--primary);
  font-size: 1.55rem;
}

.search-empty h2 {
  margin: 9px 0 3px;
  font-size: 1rem;
}

.search-empty p {
  max-width: 540px;
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.search-empty a {
  margin-top: 12px;
  color: var(--primary-dark);
  font-size: 0.82rem;
  font-weight: 700;
}

.search-pagination {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 0.8rem;
}

.search-pagination a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary-dark);
  font-weight: 700;
  text-decoration: none;
}

.search-pagination a:last-child {
  justify-self: end;
}

@media (max-width: 640px) {
  .app-header-search {
    width: 36px;
    padding: 0;
  }

  .app-header-search span {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
  }

  .search-shell {
    width: min(100% - 24px, 1040px);
    padding-top: 22px;
  }

  .search-heading h1 {
    font-size: 1.35rem;
  }

  .search-form {
    min-height: 54px;
    padding-left: 13px;
  }

  .search-form input {
    font-size: 0.9rem;
  }

  .search-starters {
    grid-template-columns: minmax(0, 1fr);
  }

  .search-result {
    grid-template-columns: 36px minmax(0, 1fr) 16px;
    gap: 10px;
    min-height: 78px;
    padding: 11px;
  }

  .search-result-icon {
    width: 36px;
    height: 36px;
  }

  .search-result-side small {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
  }

  .search-result-summary {
    -webkit-line-clamp: 2;
  }

  .search-result-heading {
    align-items: flex-start;
  }
}

.result-summary-line strong {
  color: var(--text);
  font-weight: 700;
}

.result-nav-legend {
  justify-content: flex-start;
}

.result-legend-correct {
  color: var(--success);
}

.result-legend-wrong {
  color: var(--danger);
}

.result-legend-empty {
  color: var(--primary-dark);
}

.result-legend-correct::before,
.result-legend-wrong::before,
.result-legend-empty::before {
  content: "";
  width: 10px;
  height: 10px;
  border-width: 2px;
  border-style: solid;
  border-radius: 3px;
}

.result-legend-correct::before {
  background: #ecfdf3;
  border-color: #86efac;
}

.result-legend-wrong::before {
  background: #fff1f2;
  border-color: #fda4af;
}

.result-legend-empty::before {
  background: #f4f9ff;
  border-color: #c7ddf7;
}

.result-nav-grid {
  grid-template-columns: repeat(auto-fit, minmax(38px, 1fr));
}

.result-nav-q-box {
  width: 100%;
  height: 34px;
  border-width: 2px;
  text-decoration: none;
}

.result-nav-qnum {
  font-size: 12px;
  font-weight: 700;
}

.result-nav-q-box.is-correct {
  border-color: #86efac;
  background: #ecfdf3;
  color: var(--success);
}

.result-nav-q-box.is-wrong {
  border-color: #fda4af;
  background: #fff1f2;
  color: var(--danger);
}

.result-nav-q-box.is-empty {
  border-color: #c7ddf7;
  background: #f4f9ff;
  color: var(--primary-dark);
}

.result-bottom-actions {
  justify-content: center;
  margin-top: 4px;
}

.result-bottom-actions .button {
  min-width: 148px;
}

.result-bottom-actions form {
  display: flex;
}

.topic-result-followup {
  display: grid;
  gap: 8px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
}

.topic-result-followup form,
.topic-result-followup .button {
  width: 100%;
}

.topic-result-followup .button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.topic-result-followup .topic-result-retry-form {
  display: flex;
  justify-content: center;
}

.topic-result-retry {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 6px 4px;
  border: 0;
  background: transparent;
  color: var(--primary-dark);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
}

.topic-result-retry:hover {
  text-decoration: underline;
}

/* Learning flow */
.learning-page {
  min-height: 100vh;
}

.learning-shell {
  width: min(1180px, calc(100% - 48px));
  min-height: calc(100vh - 220px);
  margin: 0 auto;
  padding: 30px 0 56px;
}

.learning-route-heading,
.learning-lesson-heading {
  margin-top: 16px;
}

.learning-route-heading {
  max-width: 760px;
}

.learning-route-heading h1,
.learning-lesson-heading h1 {
  margin: 5px 0 8px;
  color: var(--text);
  font-size: clamp(1.65rem, 3vw, 2.15rem);
  line-height: 1.2;
  letter-spacing: 0;
}

.learning-lesson-heading > div > p:not(.learning-lesson-meta) {
  margin: 0;
  color: var(--text-2);
  font-size: 0.96rem;
  line-height: 1.55;
}

.learning-route-heading > p:last-child,
.learning-lesson-heading > div > p:last-child {
  margin: 0;
  color: var(--text-2);
  font-size: 0.98rem;
  line-height: 1.65;
}

.learning-mode-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-top: 24px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #edf3f5;
}

.learning-mode-tabs a,
.practice-browser-tabs .practice-learning-tab {
  display: flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
  padding: 12px 14px;
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--text-2);
  text-decoration: none;
}

.learning-mode-tabs a.is-active {
  border-color: #cbdcdd;
  background: #fff;
  color: var(--primary-dark);
  box-shadow: 0 2px 7px rgba(28, 55, 67, 0.08);
}

.learning-mode-tabs i,
.practice-browser-tabs .practice-learning-tab > i {
  flex: 0 0 auto;
  font-size: 1.08rem;
}

.learning-mode-tabs strong,
.learning-mode-tabs small,
.practice-browser-tabs .practice-learning-tab strong,
.practice-browser-tabs .practice-learning-tab small {
  display: block;
}

.learning-mode-tabs small,
.practice-browser-tabs .practice-learning-tab small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.73rem;
}

.practice-browser-tabs:has(.practice-learning-tab) {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.learning-start-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px 28px;
  margin-top: 28px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.learning-start-band h2,
.learning-start-band p,
.learning-route-section h2,
.learning-route-section p {
  margin: 0;
}

.learning-start-band h2,
.learning-route-section h2 {
  margin-top: 3px;
  font-size: 1.15rem;
  letter-spacing: 0;
}

.learning-start-band > div:first-child > p:last-child {
  margin-top: 7px;
  color: var(--text-2);
  line-height: 1.55;
}

.learning-start-actions,
.learning-finish-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.learning-start-actions .button,
.learning-finish-actions .button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
}

.learning-draft-note {
  grid-column: 1 / -1;
  display: flex;
  align-items: flex-start;
  gap: 7px;
  padding: 10px 12px;
  border-left: 3px solid #d9a62e;
  background: #fff9eb;
  color: #6a531f;
  font-size: 0.82rem;
  line-height: 1.5;
}

.learning-route-section {
  margin-top: 34px;
}

.learning-route-section > header {
  margin-bottom: 13px;
}

.learning-lesson-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
}

.learning-lesson-row {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) 18px;
  align-items: center;
  gap: 11px;
  min-height: 78px;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  text-decoration: none;
}

.learning-lesson-row.is-ready {
  border-color: #bfdad8;
  transition: border-color 140ms ease, box-shadow 140ms ease, transform 100ms ease;
}

.learning-lesson-row.is-ready:hover {
  border-color: var(--primary);
  box-shadow: 0 4px 13px rgba(22, 96, 91, 0.09);
  transform: translateY(-1px);
}

.learning-lesson-row.is-draft {
  background: #f8fafb;
  color: #647386;
}

.learning-lesson-code {
  display: grid;
  place-items: center;
  width: 42px;
  height: 34px;
  border-radius: 5px;
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-size: 0.75rem;
  font-weight: 700;
}

.learning-lesson-row.is-draft .learning-lesson-code {
  background: #e8edf1;
  color: #607083;
}

.learning-lesson-row h3,
.learning-lesson-row p {
  margin: 0;
}

.learning-lesson-row h3 {
  font-size: 0.9rem;
  line-height: 1.4;
}

.learning-lesson-row p {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.73rem;
}

.learning-lesson-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.learning-lesson-heading > div:first-child {
  max-width: 800px;
}

.learning-save-state {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 7px;
  padding: 7px 10px;
  border: 1px solid #cbdedd;
  border-radius: 5px;
  background: #f4faf9;
  color: #326660;
  font-size: 0.74rem;
  font-weight: 650;
}

.learning-save-state.is-error {
  border-color: #efb1b1;
  background: #fff5f5;
  color: #a23939;
}

.learning-lesson-layout {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  align-items: start;
  gap: 42px;
  margin-top: 26px;
}

.learning-toc {
  position: sticky;
  top: 76px;
  min-width: 0;
  padding: 13px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.learning-toc nav {
  display: grid;
  gap: 2px;
  margin-top: 7px;
}

.learning-toc a {
  padding: 7px 9px;
  border-left: 2px solid transparent;
  color: var(--text-2);
  font-size: 0.76rem;
  font-weight: 600;
  line-height: 1.35;
  text-decoration: none;
}

.learning-toc a:hover,
.learning-toc a.is-active {
  border-left-color: var(--primary);
  background: #f0f7f6;
  color: var(--primary-dark);
}

.learning-article {
  min-width: 0;
  max-width: 820px;
}

.learning-objectives {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 24px;
  padding: 18px 0 26px;
}

.learning-objectives h2,
.learning-objectives p {
  margin: 0;
}

.learning-objectives h2 {
  margin-top: 3px;
  font-size: 1.05rem;
}

.learning-objectives ul,
.learning-guide ul,
.learning-source-note ul {
  display: grid;
  gap: 7px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.learning-objectives li,
.learning-guide li {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 7px;
  color: var(--text-2);
  line-height: 1.5;
}

.learning-objectives li i,
.learning-guide li i {
  color: var(--primary);
}

.learning-block {
  scroll-margin-top: 76px;
  padding: 34px 0;
  border-top: 1px solid var(--line);
}

.learning-block > header {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  align-items: start;
  gap: 10px;
  margin-bottom: 17px;
}

.learning-block > header > span {
  display: grid;
  place-items: center;
  width: 28px;
  height: 25px;
  border-radius: 4px;
  background: #eaf4f3;
  color: var(--primary-dark);
  font-size: 0.68rem;
  font-weight: 700;
}

.learning-block h2 {
  margin: 0;
  font-size: 1.23rem;
  line-height: 1.35;
  letter-spacing: 0;
}

.learning-markup {
  min-width: 0;
  color: #26364a;
  font-size: 0.98rem;
  line-height: 1.78;
}

.learning-markup strong {
  color: var(--text);
}

.learning-markup .markup-table-wrap {
  margin: 16px 0;
}

.learning-markup table {
  width: 100%;
  min-width: 520px;
}

.learning-block-key_point {
  margin: 10px 0;
  padding: 25px 24px;
  border: 1px solid #bcded8;
  border-radius: 6px;
  background: #f2faf8;
}

.learning-block-worked_example {
  margin: 10px 0;
  padding: 28px 24px;
  border-left: 3px solid #d6a239;
  background: #fffaf0;
}

.learning-reveal-button {
  margin-top: 14px;
}

.learning-reveal,
.learning-solution,
.learning-guide {
  margin-top: 13px;
  padding: 15px 17px;
  border-left: 3px solid var(--primary);
  background: #f2f8f7;
}

.learning-exercise {
  padding: 20px;
  border: 1px solid #ccdadd;
  border-radius: 6px;
  background: #fff;
  box-shadow: 0 5px 18px rgba(28, 55, 67, 0.06);
}

.learning-options {
  display: grid;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  border: 0;
}

.learning-options label {
  display: grid;
  grid-template-columns: 18px 34px minmax(0, 1fr);
  align-items: center;
  gap: 9px;
  min-height: 52px;
  padding: 9px 12px;
  border: 1px solid #d5dfe4;
  border-radius: 5px;
  background: #fff;
  cursor: pointer;
}

.learning-options label:has(input:checked) {
  border-color: #62aaa3;
  background: #f1f9f8;
}

.learning-options input {
  width: 17px;
  height: 17px;
  accent-color: var(--primary);
}

.learning-option-label {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border: 1px solid #b8d6d3;
  border-radius: 50%;
  color: var(--primary-dark);
  font-size: 0.78rem;
  font-weight: 700;
}

.learning-exercise-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.learning-text-button {
  padding: 8px 5px;
  border: 0;
  background: transparent;
  color: var(--primary-dark);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
}

.learning-exercise-feedback {
  margin: 13px 0 0;
  padding: 11px 13px;
  border-left: 3px solid #8093a4;
  background: #f4f7f9;
  color: var(--text-2);
  font-size: 0.88rem;
}

.learning-exercise-feedback.is-correct {
  border-left-color: #2e9a73;
  background: #eff9f4;
  color: #176046;
}

.learning-exercise-feedback.is-wrong {
  border-left-color: #d45c57;
  background: #fff5f4;
  color: #863835;
}

.learning-exercise-feedback.is-neutral::before {
  content: attr(data-empty-message);
}

.learning-hints {
  display: grid;
  gap: 7px;
  margin-top: 12px;
}

.learning-hints > div {
  padding: 11px 13px;
  border: 1px solid #e6d29d;
  border-radius: 5px;
  background: #fffaf0;
}

.learning-hints strong,
.learning-solution > strong,
.learning-guide > strong {
  display: block;
  margin-bottom: 4px;
  color: var(--text);
  font-size: 0.78rem;
}

.learning-self-check {
  display: grid;
  gap: 7px;
  margin-top: 16px;
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 700;
}

.learning-self-check textarea {
  width: 100%;
  resize: vertical;
  padding: 12px;
  border: 1px solid #ccd9df;
  border-radius: 5px;
  color: var(--text);
  font: inherit;
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.55;
}

.learning-finish {
  margin-top: 20px;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
}

.learning-source-note {
  margin-top: 24px;
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.55;
}

.learning-source-note ul {
  margin-top: 5px;
}

.learning-source-note a {
  color: #53697d;
}

@media (max-width: 820px) {
  .learning-shell {
    width: min(100% - 28px, 720px);
    padding-top: 20px;
  }

  .learning-lesson-heading {
    align-items: start;
    flex-direction: column;
  }

  .learning-lesson-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .learning-toc {
    position: static;
    padding: 10px 0;
  }

  .learning-toc nav {
    display: flex;
    gap: 5px;
    overflow-x: auto;
    padding-bottom: 3px;
    scrollbar-width: thin;
  }

  .learning-toc a {
    flex: 0 0 auto;
    max-width: 220px;
    border: 1px solid var(--line);
    border-radius: 5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .learning-toc a.is-active {
    border-color: var(--primary);
  }
}

@media (max-width: 640px) {
  .learning-shell {
    width: calc(100% - 24px);
    padding-bottom: 34px;
  }

  .learning-route-heading h1,
  .learning-lesson-heading h1 {
    font-size: 1.48rem;
  }

  .learning-mode-tabs {
    gap: 4px;
  }

  .learning-mode-tabs a,
  .practice-browser-tabs .practice-learning-tab,
  .practice-browser-tabs button {
    justify-content: center;
    gap: 6px;
    padding: 10px 6px;
    text-align: center;
  }

  .learning-mode-tabs a > span,
  .practice-browser-tabs a > span,
  .practice-browser-tabs button > span {
    min-width: 0;
  }

  .learning-mode-tabs strong,
  .practice-browser-tabs strong {
    font-size: 0.73rem;
    line-height: 1.25;
  }

  .learning-mode-tabs small,
  .practice-browser-tabs small {
    display: none;
  }

  .learning-start-band {
    grid-template-columns: minmax(0, 1fr);
    padding: 20px 0;
  }

  .learning-start-actions,
  .learning-finish-actions {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
  }

  .learning-lesson-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .learning-objectives {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .learning-block {
    padding: 27px 0;
  }

  .learning-block-key_point,
  .learning-block-worked_example {
    margin-left: -12px;
    margin-right: -12px;
    padding: 22px 14px;
    border-radius: 0;
  }

  .learning-block h2 {
    font-size: 1.08rem;
  }

  .learning-markup {
    font-size: 0.94rem;
    line-height: 1.72;
  }

  .learning-exercise {
    margin: 0 -5px;
    padding: 15px;
  }

  .learning-options label {
    grid-template-columns: 17px 30px minmax(0, 1fr);
    padding: 8px 9px;
  }

  .learning-exercise-actions .button,
  .learning-exercise-actions .learning-text-button {
    flex: 1 1 auto;
  }
}

.form-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-start;
  margin-top: 18px;
}

.form-actions.centered {
  justify-content: center;
}

.result-lock-copy,
.sidebar-account-copy {
  margin: 0;
  color: var(--text-2);
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.65;
}

.question-card {
  padding: 18px 20px;
}

.result-question-heading {
  margin: 0 0 14px;
  padding: 10px 12px 10px 14px;
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--surface-soft);
}

.result-question-title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
}

.answer-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.answer-list li,
.proof-result-box,
.explanation {
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
}

.correct-choice {
  border-color: #bbf7d0 !important;
  background: var(--success-bg) !important;
}

.answer-correct {
  color: var(--success);
  font-weight: 700;
}

.answer-wrong,
.answer-unanswered {
  color: var(--danger);
  font-weight: 700;
}

.tf-result-note {
  color: var(--text-2);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.45;
}

.explanation {
  margin-top: 12px;
  color: var(--text-2);
  font-weight: 500;
  line-height: 1.6;
}

/* Lời giải dài nên tự cuộn trong card kết quả thay vì kéo vỡ toàn bộ màn hình mobile. */
.result-explanation {
  max-height: min(62vh, 560px);
  max-width: 100%;
  overflow: auto;
  scrollbar-gutter: stable;
  overscroll-behavior: auto;
  -webkit-overflow-scrolling: touch;
}

.explanation-markup {
  min-width: 0;
  max-width: 100%;
  font-size: 15px;
  line-height: 1.66;
  overflow-wrap: anywhere;
}

/* Chỉ cho bảng Markdown tự cuộn ngang; card câu hỏi vẫn giữ layout sạch, không biến thành vùng cuộn lớn. */
.markup-table-wrap {
  display: block;
  width: 100%;
  max-width: 100%;
  margin: 6px 0;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.markup-table-wrap > table {
  width: max-content;
  min-width: 100%;
  max-width: none;
  margin: 0;
}

.markup-table-wrap::-webkit-scrollbar {
  height: 6px;
}

.markup-table-wrap::-webkit-scrollbar-thumb {
  border-radius: 6px;
  background: #aeb9bc;
}

[data-render-markup] {
  min-width: 0;
}

[data-render-markup] mjx-container.is-scrollable-math {
  display: block !important;
  width: 100%;
  max-width: 100%;
  margin: 0.35em 0;
  padding-bottom: 2px;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

[data-render-markup] mjx-container.is-scrollable-math::-webkit-scrollbar {
  height: 6px;
}

.question-text-preview table,
.take-q-text table,
.choice-text table,
.result-choice-text table,
.explanation-markup table,
.context-instruction table,
.context-passage table,
.toeic-graphic-table {
  border-collapse: collapse;
  max-width: 100%;
  margin: 6px 0;
  background: var(--surface);
  font-size: 14px;
  font-weight: normal;
  white-space: normal;
}

.take-q-text table th,
.take-q-text table td,
.choice-text table th,
.choice-text table td,
.result-choice-text table th,
.result-choice-text table td,
.explanation-markup table th,
.explanation-markup table td,
.context-instruction table th,
.context-instruction table td,
.context-passage table th,
.context-passage table td,
.toeic-graphic-table th,
.toeic-graphic-table td {
  border: 1px solid var(--line);
  padding: 5px 10px;
  text-align: center;
  line-height: 1.4;
  vertical-align: middle;
}

.take-q-text table th,
.choice-text table th,
.result-choice-text table th,
.explanation-markup table th,
.context-instruction table th,
.context-passage table th,
.toeic-graphic-table th {
  background: var(--surface-soft);
  color: var(--text-2);
  font-weight: 700;
}

@media (max-width: 760px) {
  .student-shell,
  .student-shell-wide {
    width: min(100% - 24px, 1060px);
    padding: 22px 0 48px;
  }

  .take-layout {
    grid-template-columns: 1fr;
  }

  .take-nav {
    position: static;
    max-height: none;
  }

  .toeic-part-list {
    grid-auto-flow: column;
    grid-auto-columns: minmax(132px, 1fr);
    overflow-x: auto;
    padding-bottom: 10px;
    scrollbar-width: thin;
  }

  .toeic-part-button {
    min-height: 46px;
  }

  .take-heading h1,
  .take-heading h1.is-long,
  .take-heading h1.is-very-long {
    font-size: 17px;
    line-height: 1.38;
  }

  /* Context dài trên mobile nên giữ căn trái để tránh khoảng trắng bị kéo giãn khó đọc. */
  .context-passage {
    text-align: left;
  }

  /* Result page cần co riêng vì card đáp án và khối điểm nếu giữ desktop spacing
     sẽ tạo cảm giác như đang xem trên màn hình rộng bị ép nhỏ lại. */
  .result-main-column,
  .question-preview {
    gap: 14px;
  }

  .result-layout {
    grid-template-columns: 1fr;
  }

  .result-nav {
    position: static;
    max-height: none;
  }

  .result-hero {
    margin-bottom: 14px;
    padding: 26px 18px 22px;
  }

  .result-hero h1 {
    font-size: 34px;
  }

  .question-card {
    padding: 14px;
  }

  .result-question-heading {
    margin-bottom: 10px;
    padding: 9px 10px 9px 12px;
  }

  .result-question-title {
    font-size: 15px;
  }

  .answer-list li,
  .proof-result-box,
  .explanation {
    padding: 9px 10px;
  }

  .question-image,
  .question-image-wrap,
  .choice-image {
    margin: 10px 0 14px;
  }

  .question-image img,
  .question-image-wrap img,
  .explanation-image {
    max-height: 340px;
  }

  /* Ảnh trong đáp án cần một hàng riêng trên mobile. Nếu để chung hàng với
     radio/nhãn/text và giới hạn chiều cao, ảnh dọc sẽ bị co nhỏ đến mức khó đọc. */
  .take-choices > label.choice-row {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .take-choices.toeic-part-one-choices > label.choice-row {
    align-items: center;
    flex-wrap: nowrap;
    gap: 6px;
    min-height: 48px;
    padding: 6px;
  }

  .take-choices > label.choice-row > .choice-image,
  .true-false-row > .choice-image,
  .result-choice-body > .choice-image {
    width: 100%;
    max-width: 100%;
    max-height: none;
    margin: 8px 0 2px;
    object-fit: contain;
  }

  .take-choices > label.choice-row > .choice-image {
    flex: 0 0 100%;
  }

  .result-explanation {
    margin: 0 14px 14px;
    max-height: min(52vh, 420px);
    overflow: auto;
  }

  .true-false-row {
    grid-template-columns: 32px minmax(0, 1fr);
  }

  .true-false-row > .choice-image {
    grid-column: 1 / -1;
  }

  .tf-choice-controls {
    grid-column: 2 / 3;
  }
}

/* Sidebar uses a compact navigation tree; final rows navigate, intermediate
   rows only reveal the next level. */
.sidebar-tree-group,
.sidebar-tree-subject {
  min-width: 0;
}
.sidebar-tree-group summary,
.sidebar-tree-subject summary {
  list-style: none;
  cursor: pointer;
}
.sidebar-tree-group summary::-webkit-details-marker,
.sidebar-tree-subject summary::-webkit-details-marker {
  display: none;
}
.sidebar-tree-group > summary {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr) 14px;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 8px 10px;
  border-radius: 6px;
  color: var(--text-2);
  font-size: .84rem;
  font-weight: 650;
}
.sidebar-tree-group > summary:hover,
.sidebar-tree-group[open] > summary {
  background: var(--primary-soft);
  color: var(--primary-dark);
}
.sidebar-tree-group > summary > i:last-child,
.sidebar-tree-subject > summary > i {
  justify-self: end;
  color: var(--muted);
  font-size: .64rem;
  transition: transform 140ms ease;
}
.sidebar-tree-group[open] > summary > i:last-child,
.sidebar-tree-subject[open] > summary > i {
  color: var(--primary-dark);
  transform: rotate(180deg);
}
.sidebar-tree-subjects {
  display: grid;
  gap: 2px;
  margin: 3px 0 5px 15px;
  padding-left: 10px;
  border-left: 1px solid #cbdcda;
}
.sidebar-tree-subject > summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 14px;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  padding: 6px 8px;
  border-radius: 5px;
  color: var(--text-2);
  font-size: .78rem;
  font-weight: 650;
}
.sidebar-tree-subject > summary:hover,
.sidebar-tree-subject[open] > summary {
  background: #f3f7f6;
  color: var(--primary-dark);
}
.sidebar-tree-subject nav {
  display: grid;
  gap: 2px;
  margin: 2px 0 5px 9px;
  padding-left: 9px;
  border-left: 1px solid #d8e4e2;
}
.sidebar-tree-subject nav a {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  align-items: center;
  gap: 6px;
  min-height: 31px;
  padding: 5px 7px;
  border-radius: 5px;
  color: var(--text-2);
  font-size: .73rem;
  font-weight: 600;
  text-decoration: none;
}
.sidebar-tree-subject nav a:hover,
.sidebar-tree-subject nav a.active {
  background: var(--primary);
  color: #fff;
}
.sidebar-tree-all-subjects {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  min-height: 32px;
  padding: 5px 8px;
  color: var(--primary-dark);
  font-size: .72rem;
  font-weight: 650;
  text-decoration: none;
}
.sidebar-tree-all-subjects:hover {
  text-decoration: underline;
}
.sidebar-tree-subject-nested {
  margin-left: 7px;
}
.sidebar-tree-pending {
  display: block;
  padding: 7px 8px 8px;
  color: var(--muted);
  font-size: .7rem;
}
.sidebar-tree-group summary:focus-visible,
.sidebar-tree-subject summary:focus-visible,
.sidebar-tree-subject nav a:focus-visible,
.sidebar-tree-all-subjects:focus-visible {
  outline: 3px solid rgba(15, 118, 110, .24);
  outline-offset: 2px;
}

/* Catalog shell: navigation names destinations; page content owns the filters. */
.sidebar-learning-panel {
  display: grid;
  gap: 3px;
  padding: 5px 10px 14px;
  border-bottom: 1px solid var(--line);
}

.sidebar-learning-link,
.sidebar-teacher-link {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr) 14px;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 8px 10px;
  border-radius: 6px;
  color: var(--text-2);
  font-size: 0.84rem;
  font-weight: 650;
  text-decoration: none;
}

.sidebar-learning-link:hover,
.sidebar-learning-link.active,
.sidebar-teacher-link:hover,
.sidebar-teacher-link.active {
  background: var(--primary-soft);
  color: var(--primary-dark);
}

.sidebar-learning-link > i:last-child {
  color: var(--muted);
  font-size: 0.68rem;
}

.sidebar-teacher-link {
  grid-template-columns: 22px minmax(0, 1fr);
  padding-right: 8px;
  border: 1px solid var(--line);
  background: #fff;
}

.content-breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 5px;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 650;
}

.content-breadcrumb a {
  color: var(--primary-dark);
  text-decoration: none;
}

.content-breadcrumb i {
  font-size: 0.58rem;
}

.home-product-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.home-school-actions {
  display: grid;
  gap: 7px;
}

.home-school-actions a {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr) 14px;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  padding: 8px 10px;
  border: 1px solid #dce4e6;
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  font-size: 0.8rem;
  font-weight: 700;
  text-decoration: none;
}

.home-school-actions a:hover {
  border-color: #a8cbc6;
  background: #f2f8f6;
}

.home-school-actions a > i:last-child {
  color: var(--muted);
  font-size: 0.68rem;
}

.home-latest-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.toeic-workspace {
  display: grid;
  gap: 14px;
}

.toeic-workspace-heading p {
  margin: 0;
  color: var(--text-2);
  font-size: 0.88rem;
}

.toeic-workspace-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.toeic-workspace-grid > button {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 14px;
  align-items: center;
  gap: 10px;
  min-height: 86px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.toeic-workspace-grid > button:hover,
.toeic-workspace-grid > button.is-active {
  border-color: #8fc5bd;
  background: var(--primary-soft);
}

.toeic-workspace-grid > button > i:first-child {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 7px;
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-size: 1rem;
}

.toeic-workspace-grid > button > i:last-child {
  color: var(--muted);
  font-size: 0.7rem;
}

.toeic-workspace-grid .bi-chevron-down {
  transition: transform 160ms ease;
}

.toeic-workspace-grid .bi-chevron-down.is-open {
  transform: rotate(180deg);
}

.toeic-workspace-grid strong,
.toeic-workspace-grid small {
  display: block;
}

.toeic-workspace-grid strong {
  font-size: 0.86rem;
  line-height: 1.35;
}

.toeic-workspace-grid small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.71rem;
  line-height: 1.4;
}

.toeic-full-tests {
  display: grid;
  gap: 14px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.toeic-full-tests[hidden] {
  display: none;
}

@media (min-width: 641px) and (max-width: 900px) {
  .home-product-grid,
  .toeic-workspace-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .home-product-grid,
  .home-latest-list,
  .toeic-workspace-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .toeic-workspace-grid > button {
    min-height: 72px;
  }
}

/* ===== Student Home Shell: copied from studio, stripped to student actions ===== */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 16px;
  height: 58px;
  padding: 0 20px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}

.app-header.app-header-plain {
  justify-content: space-between;
}

.app-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.app-header-right {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

.app-header-right form,
.sidebar-account-form {
  margin: 0;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 1px;
  background: var(--text-2);
  transition: transform var(--t), opacity var(--t);
}

.nav-toggle.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: #17233c;
  font-weight: 700;
  text-decoration: none;
}

.brand-mark {
  display: block;
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
}

.brand-wordmark {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.85px;
  line-height: 1;
}

.brand-dot {
  color: #256fd2;
}

.sidebar-overlay {
  position: fixed;
  inset: 58px 0 0;
  z-index: 190;
  background: rgba(15, 23, 42, 0.18);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease;
}

.sidebar-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

body.sidebar-open {
  overflow: hidden;
}

.app-sidebar {
  position: fixed;
  top: 58px;
  left: 0;
  bottom: 0;
  z-index: 200;
  width: min(340px, calc(100vw - 28px));
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  background: var(--surface);
  box-shadow: var(--shadow-md);
  transform: translateX(-100%);
  transition: transform 230ms cubic-bezier(0.4, 0, 0.2, 1);
}

.app-sidebar.is-open {
  transform: translateX(0);
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 8px;
  border-bottom: 1px solid var(--line);
}

.sidebar-account,
.take-account-card,
.result-side-panel {
  display: grid;
  gap: 10px;
  padding: 14px;
  border-bottom: 1px solid var(--line);
  background: #fbfdff;
}

.sidebar-account-footer {
  margin-top: auto;
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  border-bottom: 0;
  background: var(--surface);
}

.sidebar-account-footer + .sidebar-legal {
  margin-top: 0;
}

.take-account-card,
.result-side-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.sidebar-account-label {
  margin: 0;
  color: var(--text-2);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.sidebar-account-email {
  min-width: 0;
  margin: 0;
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.sidebar-account-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sidebar-account-row .sidebar-account-email {
  flex: 1;
}

.sidebar-account-actions {
  display: grid;
  gap: 8px;
}

.sidebar-account-button {
  width: 100%;
}

.sidebar-account-form {
  display: flex;
  justify-content: flex-end;
}

.sidebar-logout-button {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: #5c7188;
  font-size: 1rem;
  cursor: pointer;
  transition: border-color 140ms ease, background 140ms ease, color 140ms ease, transform 100ms ease;
}

.sidebar-logout-button:hover {
  background: #fff0f0;
  color: #b34848;
}

.sidebar-logout-button:active {
  transform: translateY(1px);
}

.sidebar-logout-button:focus-visible {
  outline: 3px solid rgba(42, 116, 209, 0.24);
  outline-offset: 2px;
}

.history-page-shell {
  flex: 1 0 auto;
}

.history-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.history-heading h1,
.history-heading p {
  margin: 0;
}

.history-heading h1 {
  font-size: 1.55rem;
}

.history-heading > span {
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
}

.history-list {
  display: grid;
  gap: 8px;
}

.history-item {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 12px;
  min-height: 78px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}

.history-item-icon {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--primary-light);
  color: var(--primary-dark);
}

.history-item-main {
  min-width: 0;
}

.history-item-labels {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 3px;
  color: var(--primary-dark);
  font-size: 0.68rem;
  font-weight: 700;
}

.history-item-labels small {
  color: var(--muted);
  font-size: inherit;
  font-weight: 600;
}

.history-item h2 {
  margin: 0;
  overflow: hidden;
  color: var(--text);
  font-size: 0.86rem;
  line-height: 1.4;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.history-item time {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.7rem;
}

.history-score {
  color: var(--text);
  font-size: 0.8rem;
  white-space: nowrap;
}

.history-detail-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 34px;
  padding: 0 10px;
  border: 1px solid #c5d8ef;
  border-radius: var(--radius-sm);
  background: #f3f8ff;
  color: var(--primary-dark);
  font-size: 0.75rem;
  font-weight: 700;
  text-decoration: none;
}

.history-summary-only {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 600;
  white-space: nowrap;
}

.history-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 18px;
  color: var(--text-2);
  font-size: 0.78rem;
  font-weight: 700;
}

.history-pagination a {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--primary-dark);
  text-decoration: none;
}

.history-empty {
  display: grid;
  justify-items: center;
  gap: 8px;
  padding: 44px 20px;
  text-align: center;
}

.history-empty > i {
  color: var(--primary);
  font-size: 1.7rem;
}

.history-empty > span {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.82rem;
}

/* Kỳ thi riêng: dùng cùng nhịp giao diện vận hành, tránh dựng một dashboard khác. */
.hosted-shell {
  width: min(1120px, calc(100% - 32px));
  margin-inline: auto;
}

.hosted-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
}

.hosted-heading h1,
.hosted-heading p,
.hosted-panel h2,
.hosted-panel p {
  margin: 0;
}

.hosted-heading h1 {
  margin-top: 3px;
  font-size: 1.6rem;
}

.hosted-heading > div > p:last-child {
  margin-top: 6px;
  color: var(--text-2);
  font-size: 0.84rem;
}

.hosted-list,
.hosted-selected-list,
.hosted-bank-list {
  display: grid;
  gap: 8px;
}

.hosted-list-item,
.hosted-question-row,
.hosted-bank-item {
  display: grid;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.hosted-list-item {
  grid-template-columns: minmax(0, 1fr) auto 38px;
  padding: 13px 14px;
}

.hosted-list-main h2 {
  margin: 5px 0 2px;
  font-size: 0.94rem;
}

.hosted-list-main p,
.hosted-question-meta,
.hosted-bank-item span,
.hosted-note {
  color: var(--muted);
  font-size: 0.72rem;
}

.hosted-status {
  display: inline-flex;
  width: fit-content;
  padding: 3px 7px;
  border-radius: 4px;
  background: #eef3f8;
  color: #53677d;
  font-size: 0.66rem;
  font-weight: 700;
}

.hosted-status.is-live { background: #e8f7ee; color: #247244; }
.hosted-status.is-upcoming { background: #fff5dc; color: #8a6414; }
.hosted-status.is-ended { background: #edf1f5; color: #586878; }

.hosted-empty {
  display: grid;
  justify-items: center;
  gap: 8px;
  padding: 50px 20px;
  text-align: center;
}

.hosted-empty i { color: var(--primary); font-size: 1.8rem; }

.hosted-builder-shell {
  display: grid;
  gap: 16px;
}

.hosted-builder-shell > .hosted-heading { margin-bottom: 0; }

.hosted-panel,
.hosted-results-wrap {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}

.hosted-panel-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 16px;
}

.hosted-panel-heading h2 { margin-top: 2px; font-size: 1rem; }

.hosted-form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.hosted-form-grid label,
.hosted-join-form label,
.hosted-point-input {
  display: grid;
  gap: 6px;
  color: var(--text);
  font-size: 0.75rem;
  font-weight: 700;
}

.hosted-form-grid label.is-wide { grid-column: 1 / -1; }
.hosted-form-grid small { color: var(--muted); font-size: 0.68rem; font-weight: 500; }

.hosted-form-grid input,
.hosted-form-grid select,
.hosted-bank-filters input,
.hosted-bank-filters select,
.hosted-share-row input,
.hosted-join-form input,
.hosted-point-input input {
  width: 100%;
  min-height: 40px;
  padding: 8px 10px;
  border: 1px solid #cbd8e7;
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--text);
  font: inherit;
}

.hosted-checkbox {
  display: flex !important;
  align-items: center;
  align-self: end;
  min-height: 40px;
}
.hosted-checkbox input { width: 18px; min-height: 18px; }

.hosted-schedule-summary {
  display: grid;
  gap: 3px;
  margin-top: 14px;
  padding: 12px 13px;
  border-left: 3px solid var(--primary);
  background: #f3f8ff;
  color: var(--text-2);
  font-size: 0.75rem;
  line-height: 1.55;
}

.hosted-schedule-summary strong {
  color: var(--primary-dark);
  font-size: 0.78rem;
}

.hosted-question-row {
  grid-template-columns: 34px minmax(0, 1fr) 76px 38px;
  padding: 10px;
}

.hosted-question-number {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 0.75rem;
  font-weight: 700;
}

.hosted-question-row p,
.hosted-bank-item p {
  margin-top: 3px;
  overflow-wrap: anywhere;
  color: var(--text);
  font-size: 0.78rem;
  line-height: 1.5;
}

.hosted-point-input input { min-height: 34px; padding: 5px 7px; }

.hosted-form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 16px;
}

.hosted-delete-draft {
  margin-right: auto;
  color: #a03c3c;
}

.hosted-bank-filters {
  display: grid;
  grid-template-columns: minmax(190px, 1.4fr) repeat(3, minmax(130px, 1fr)) auto;
  gap: 8px;
  margin-bottom: 14px;
}

.hosted-bank-item {
  grid-template-columns: minmax(0, 1fr) 38px;
  padding: 11px 12px;
  box-shadow: none;
}

.hosted-alert {
  padding: 11px 13px;
  border: 1px solid #efc4c4;
  border-radius: var(--radius-sm);
  background: #fff3f3;
  color: #943d3d;
  font-size: 0.78rem;
  font-weight: 600;
}

.hosted-share-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; }
.hosted-note { margin-top: 10px !important; }

.hosted-summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.hosted-summary-grid article {
  display: grid;
  gap: 5px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.hosted-summary-grid span { color: var(--muted); font-size: 0.7rem; }
.hosted-summary-grid strong { font-size: 0.88rem; }
.hosted-danger-zone { display: flex; justify-content: flex-end; margin-top: 24px; }
.hosted-danger-zone .button { color: #a03c3c; }

.hosted-join-shell {
  display: grid;
  place-items: center;
  min-height: calc(100vh - 58px);
  padding: 20px;
}

.hosted-join-panel {
  width: min(460px, 100%);
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.hosted-join-panel h1 { margin: 4px 0 14px; font-size: 1.3rem; line-height: 1.4; }
.hosted-join-facts { display: flex; flex-wrap: wrap; gap: 8px 14px; margin-bottom: 18px; color: var(--text-2); font-size: 0.72rem; font-weight: 600; }
.hosted-join-facts span { display: inline-flex; align-items: center; gap: 5px; }
.hosted-join-form { display: grid; gap: 13px; }

.hosted-results-wrap { overflow-x: auto; }
.hosted-results-table { width: 100%; min-width: 640px; border-collapse: collapse; font-size: 0.76rem; }
.hosted-results-table th,
.hosted-results-table td { padding: 11px 9px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; }
.hosted-results-table th { color: var(--muted); font-size: 0.68rem; text-transform: uppercase; }
.hosted-results-table td small { display: block; margin-top: 2px; color: var(--muted); }
.hosted-results-empty { padding: 32px !important; color: var(--muted); text-align: center !important; }

.teacher-access-shell {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
  gap: 30px;
  align-items: center;
  width: min(920px, calc(100% - 32px));
  min-height: calc(100vh - 58px);
  margin: 0 auto;
  padding: 32px 0;
}

.teacher-access-intro h1,
.teacher-access-intro p,
.teacher-access-form h2 {
  margin: 0;
}

.teacher-access-intro h1 {
  margin: 8px 0;
  font-size: 2rem;
}

.teacher-access-intro > p:last-child {
  max-width: 440px;
  color: var(--text-2);
  font-size: 0.88rem;
  line-height: 1.65;
}

.teacher-access-icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  margin-bottom: 18px;
  border-radius: 8px;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 1.35rem;
}

.teacher-access-form,
.teacher-access-status {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.teacher-access-form {
  display: grid;
  gap: 14px;
}

.teacher-access-form-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 12px;
}

.teacher-access-form-heading h2 { font-size: 1rem; }
.teacher-access-form-heading > span { color: var(--muted); font-size: 0.7rem; }
.teacher-access-form label { display: grid; gap: 6px; color: var(--text); font-size: 0.74rem; font-weight: 700; }
.teacher-access-form input,
.teacher-access-form textarea {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid #cbd8e7;
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--text);
  font: inherit;
  resize: vertical;
}

.teacher-access-form input { min-height: 40px; }
.teacher-access-form .button { width: 100%; }

.teacher-access-status {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.teacher-access-status > i { color: #987019; font-size: 1.2rem; }
.teacher-access-status div { display: grid; gap: 5px; }
.teacher-access-status span { color: var(--text-2); font-size: 0.78rem; line-height: 1.55; }
.teacher-access-status.is-rejected > i { color: #a14b4b; }

.teacher-center-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 24px;
}

.teacher-center-action,
.teacher-center-action button {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 78px;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--text);
  font: inherit;
  text-align: left;
  text-decoration: none;
}

.teacher-center-action { padding: 0; }
.teacher-center-action:is(a, div) { padding: 11px 12px; }
form.teacher-center-action { display: block; }
form.teacher-center-action > button { height: 100%; }
.teacher-center-action button { border: 0; cursor: pointer; }
.teacher-center-action > i:first-child,
.teacher-center-action button > i:first-child {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 7px;
  background: var(--primary-light);
  color: var(--primary-dark);
}
.teacher-center-action span { display: grid; gap: 3px; }
.teacher-center-action small { color: var(--muted); font-size: 0.67rem; }
.teacher-center-action em { color: var(--muted); font-size: 0.66rem; font-style: normal; font-weight: 700; }
.teacher-center-action.is-primary { border-color: #b9d2f3; }
.teacher-center-action.is-muted { background: #f8fafc; }

.teacher-section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}
.teacher-section-heading p,
.teacher-section-heading h2 { margin: 0; }
.teacher-section-heading h2 { font-size: 1.05rem; }
.teacher-section-heading > span { color: var(--muted); font-size: 0.72rem; font-weight: 700; }

@media (max-width: 760px) {
  .hosted-shell { width: min(100% - 20px, 1120px); }
  .hosted-heading { align-items: stretch; flex-direction: column; }
  .hosted-heading .button { width: 100%; }
  .hosted-form-grid,
  .hosted-bank-filters,
  .hosted-summary-grid { grid-template-columns: 1fr; }
  .hosted-form-grid label.is-wide { grid-column: auto; }
  .hosted-question-row { grid-template-columns: 30px minmax(0, 1fr) 64px; }
  .hosted-question-row > .icon-button { grid-column: 3; grid-row: 2; justify-self: end; }
  .hosted-form-actions { align-items: stretch; flex-direction: column; }
  .hosted-delete-draft { order: 3; margin-right: 0; }
  .hosted-share-row { grid-template-columns: 1fr; }
  .hosted-list-item { grid-template-columns: minmax(0, 1fr) 38px; }
  .hosted-list-item > strong { grid-column: 1; color: var(--muted); font-size: 0.72rem; }
  .hosted-list-item > .icon-button { grid-column: 2; grid-row: 1 / span 2; }
  .hosted-results-wrap { padding: 10px; overflow: visible; }
  .hosted-results-table { min-width: 0; }
  .hosted-results-table thead { display: none; }
  .hosted-results-table tbody { display: grid; gap: 10px; }
  .hosted-results-table tr {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 14px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
  }
  .hosted-results-table td {
    display: grid;
    gap: 3px;
    min-width: 0;
    padding: 0;
    border: 0;
    overflow-wrap: anywhere;
  }
  .hosted-results-table td::before {
    color: var(--muted);
    font-size: 0.62rem;
    font-weight: 700;
    text-transform: uppercase;
  }
  .hosted-results-table td:nth-child(1) { grid-column: 1 / -1; }
  .hosted-results-table td:nth-child(1)::before { content: "Học sinh"; }
  .hosted-results-table td:nth-child(2)::before { content: "Trạng thái"; }
  .hosted-results-table td:nth-child(3)::before { content: "Bắt đầu"; }
  .hosted-results-table td:nth-child(4)::before { content: "Nộp bài"; }
  .hosted-results-table td:nth-child(5)::before { content: "Kết quả"; }
  .hosted-results-table td:nth-child(6) { grid-column: 2; align-self: end; justify-self: end; }
  .hosted-results-table td.hosted-results-empty { grid-column: 1 / -1; padding: 20px !important; }
  .hosted-results-table td.hosted-results-empty::before { content: none; }
  .teacher-access-shell { grid-template-columns: 1fr; align-content: start; align-items: stretch; gap: 20px; min-height: auto; padding: 22px 0; }
  .teacher-access-intro h1 { font-size: 1.55rem; }
  .teacher-access-form-heading { align-items: start; flex-direction: column; gap: 4px; }
  .teacher-center-actions { grid-template-columns: 1fr; }
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 10px 14px;
  border-radius: var(--r-sm);
  color: var(--text);
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
}

.sidebar-nav-current {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 10px 14px;
  border: 1px solid #cfe0f4;
  border-radius: var(--r-sm);
  background: #f3f8ff;
  color: var(--primary-dark);
  font-size: 15px;
  font-weight: 700;
}

.sidebar-nav a:hover {
  background: var(--surface-subtle);
  color: var(--text);
}

.sidebar-nav a.active {
  border: 1px solid #bfdbfe;
  background: var(--primary-soft);
  color: var(--primary-dark);
}

.sidebar-nav a i,
.sidebar-nav-current i {
  width: 20px;
  text-align: center;
}

.sidebar-legal {
  display: grid;
  gap: 2px;
  margin-top: auto;
  padding: 10px 8px 14px;
  border-top: 1px solid var(--line);
}

.sidebar-legal a {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  min-height: 40px;
  padding: 8px 14px;
  border-radius: var(--r-sm);
  color: var(--text-2);
  font-size: 0.86rem;
  font-weight: 600;
  line-height: 1.35;
  text-decoration: none;
}

.sidebar-legal a:hover,
.sidebar-legal a.active {
  background: var(--primary-light);
  color: var(--primary-dark);
}

.sidebar-legal a i {
  width: 20px;
  color: var(--muted);
  text-align: center;
}

.sidebar-legal a:hover i,
.sidebar-legal a.active i {
  color: var(--primary);
}

.sidebar-secondary {
  flex: 0 0 auto;
  border-top: 1px solid var(--line);
}

.sidebar-secondary > summary {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr) 14px;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  margin: 0;
  padding: 9px 22px;
  color: var(--text-2);
  font-size: 0.84rem;
  font-weight: 700;
  list-style: none;
  cursor: pointer;
}

.sidebar-secondary > summary::-webkit-details-marker {
  display: none;
}

.sidebar-secondary > summary:hover,
.sidebar-secondary[open] > summary {
  background: var(--surface-subtle);
  color: var(--primary-dark);
}

.sidebar-secondary > summary > i:first-child {
  color: var(--muted);
  text-align: center;
}

.sidebar-secondary > summary > i:last-child {
  justify-self: end;
  color: var(--muted);
  font-size: 0.68rem;
  transition: transform 140ms ease;
}

.sidebar-secondary[open] > summary > i:last-child {
  transform: rotate(180deg);
}

.sidebar-secondary .sidebar-legal {
  margin: 0;
  padding: 2px 8px 12px;
  border-top: 0;
}

.sidebar-secondary > summary:focus-visible {
  outline: 3px solid rgba(15, 118, 110, 0.24);
  outline-offset: -3px;
}

.page-shell {
  width: min(1080px, calc(100% - 48px));
  margin: 0 auto;
  padding: 36px 0 64px;
}

body.home-page .page-shell {
  flex: 1 0 auto;
}

.page-shell:has(.home-layout) {
  width: min(1440px, calc(100% - 48px));
}

.site-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: auto;
  padding: 8px 24px 22px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.4;
  text-align: center;
  background: transparent;
}

.site-footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px 20px;
  width: 100%;
  font-size: 13px;
}

.site-footer-links a {
  color: inherit;
  text-decoration: none;
}

.site-footer-links a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.site-footer-brand {
  display: block;
}

.site-footer-certification {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
}

.site-footer-certification:focus-visible {
  outline: 3px solid rgba(39, 116, 217, 0.3);
  outline-offset: 4px;
}

.site-footer-certification img {
  display: block;
  width: auto;
  height: 44px;
}

.policy-page-shell {
  width: min(880px, calc(100% - 48px));
  flex: 1 0 auto;
  margin: 0 auto;
  padding: 36px 0 64px;
}

.policy-container {
  width: 100%;
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.policy-content h1 {
  margin: 4px 0 24px;
  color: var(--text);
  font-size: clamp(22px, 3vw, 28px);
  line-height: 1.3;
}

.policy-kicker {
  margin: 0;
  color: var(--primary-dark);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.policy-content h2 {
  margin: 28px 0 12px;
  color: var(--text);
  font-size: 17px;
  line-height: 1.4;
}

.policy-content p {
  margin: 0 0 16px;
  color: var(--text-2);
  line-height: 1.75;
}

.policy-content ul,
.policy-content ol {
  margin: 0 0 18px;
  padding-left: 22px;
}

.policy-content li {
  margin-bottom: 16px;
  color: var(--text-2);
  line-height: 1.7;
}

.policy-content li:last-child {
  margin-bottom: 0;
}

.policy-content strong {
  color: var(--text);
}

.policy-content code {
  color: var(--primary-dark);
  font-family: inherit;
  font-weight: 700;
}

.policy-content a {
  color: var(--primary-dark);
  text-underline-offset: 3px;
}

.legal-details {
  display: grid;
  grid-template-columns: minmax(150px, 0.35fr) minmax(0, 1fr);
  margin: 0 0 22px;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}

.legal-details dt,
.legal-details dd {
  margin: 0;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  line-height: 1.55;
}

.legal-details dt {
  background: #f8fafc;
  color: var(--text);
  font-weight: 700;
}

.legal-details dd {
  color: var(--text-2);
}

.legal-details dt:last-of-type,
.legal-details dd:last-of-type {
  border-bottom: 0;
}

.pricing-page-shell {
  width: min(1180px, calc(100% - 48px));
  flex: 1 0 auto;
  margin: 0 auto;
  padding: 48px 0 64px;
}

.pricing-hero {
  max-width: 680px;
  margin: 0 auto 32px;
  text-align: center;
}

.pricing-hero h1 {
  margin: 0 0 12px;
  color: var(--text);
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1.15;
}

.pricing-hero p,
.pricing-card > p {
  margin: 0;
  color: var(--text-2);
  line-height: 1.65;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  align-items: stretch;
}

.pricing-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.pricing-card.is-featured {
  border-color: rgba(37, 111, 210, 0.55);
  box-shadow: 0 16px 42px rgba(37, 111, 210, 0.13);
}

.pricing-card-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.pricing-availability {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  max-width: 760px;
  margin-top: 18px;
  padding: 12px 14px;
  border: 1px solid #c9ddd8;
  border-radius: 7px;
  background: #f2f8f7;
  color: #315f57;
  font-size: 13px;
  line-height: 1.55;
}

.pricing-availability i {
  flex: 0 0 auto;
  margin-top: 2px;
  color: #08785f;
}

.pricing-availability a {
  color: #075e50;
  font-weight: 700;
}

.pricing-product-icon {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 12px;
  background: #eaf3ff;
  color: var(--primary-dark);
  font-size: 20px;
}

.pricing-status {
  padding: 5px 10px;
  border-radius: 999px;
  background: #fff7df;
  color: #8a5a00;
  font-size: 11px;
  font-weight: 700;
}

.pricing-badge {
  position: absolute;
  top: 20px;
  right: 20px;
  padding: 5px 9px;
  border-radius: 999px;
  background: #eaf3ff;
  color: var(--primary-dark);
  font-size: 11px;
  font-weight: 700;
}

.pricing-card h2 {
  margin: 0 0 8px;
  color: var(--text);
  font-size: 23px;
}

.pricing-features {
  display: grid;
  gap: 9px;
  margin: 18px 0 4px;
  padding: 0;
  list-style: none;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  color: var(--text-2);
  font-size: 13px;
  line-height: 1.5;
}

.pricing-features i {
  flex: 0 0 auto;
  margin-top: 2px;
  color: var(--primary);
}

.pricing-list {
  display: grid;
  gap: 0;
  margin: 22px 0;
  padding: 0;
  list-style: none;
}

.pricing-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  color: var(--text-2);
}

.pricing-list li:first-child {
  border-top: 1px solid var(--line);
}

.pricing-list strong {
  color: var(--text);
  font-size: 18px;
}

.pricing-action {
  width: 100%;
  margin-top: auto;
  text-align: center;
}

.pricing-notes {
  margin-top: 22px;
  padding: 24px 28px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #f8fafc;
}

.pricing-notes h2 {
  margin: 0 0 12px;
  color: var(--text);
  font-size: 18px;
}

.pricing-notes ul {
  margin: 0;
  padding-left: 20px;
  color: var(--text-2);
  line-height: 1.7;
}

.pricing-policy-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 18px;
}

.pricing-policy-links a {
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}

.pricing-policy-links a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.checkout-page-shell,
.packages-page-shell {
  width: min(1040px, calc(100% - 40px));
  flex: 1 0 auto;
  margin: 0 auto;
  padding: 40px 0 56px;
}

.checkout-heading {
  margin-bottom: 24px;
}

.checkout-heading h1 {
  margin: 4px 0 8px;
  color: var(--text);
  font-size: 30px;
  line-height: 1.25;
}

.checkout-heading > p:last-child {
  margin: 0;
  color: var(--text-2);
}

.checkout-alert {
  margin-bottom: 16px;
  padding: 12px 14px;
  border: 1px solid #efb4b4;
  border-radius: 6px;
  background: #fff7f7;
  color: #9f2525;
  line-height: 1.5;
}

.checkout-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.82fr);
  gap: 18px;
  align-items: start;
}

.checkout-panel,
.packages-section,
.payment-status-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.checkout-panel {
  padding: 24px;
}

.checkout-panel h2,
.packages-section h2 {
  margin: 0 0 18px;
  color: var(--text);
  font-size: 17px;
}

.checkout-config-form {
  display: grid;
  gap: 16px;
}

.checkout-config-form label {
  display: grid;
  gap: 7px;
}

.checkout-config-form label > span {
  color: #40566f;
  font-size: 12px;
  font-weight: 750;
}

.checkout-config-form select {
  width: 100%;
  min-height: 48px;
  padding: 0 38px 0 12px;
  border: 1px solid #b9c9da;
  border-radius: 6px;
  background-color: #f4f8fd;
  color: var(--text);
  font: inherit;
  font-weight: 600;
  box-shadow: 0 1px 2px rgba(24, 49, 83, 0.05);
  transition: border-color 150ms ease, background-color 150ms ease, box-shadow 150ms ease;
}

.checkout-config-form select:hover {
  border-color: #7f9fbe;
  background-color: #fff;
}

.checkout-config-form select:focus {
  border-color: var(--primary);
  background-color: #fff;
  outline: 3px solid rgba(37, 111, 210, 0.13);
  box-shadow: 0 2px 7px rgba(37, 111, 210, 0.1);
}

.checkout-config-form select:disabled {
  border-color: #d8e0e8;
  background-color: #f3f5f7;
  color: #8795a5;
  box-shadow: none;
}

.checkout-summary dl {
  margin: 0;
}

.checkout-summary dl > div,
.payment-order-facts > div {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}

.checkout-summary dt,
.payment-order-facts dt {
  color: var(--text-2);
}

.checkout-summary dd,
.payment-order-facts dd {
  margin: 0;
  color: var(--text);
  font-weight: 700;
  text-align: right;
}

.checkout-summary .is-credit dd {
  color: #08785f;
}

.checkout-summary .checkout-total {
  padding-top: 16px;
  border-bottom: 0;
}

.checkout-summary .checkout-total dd {
  color: var(--primary-dark);
  font-size: 23px;
}

.checkout-note {
  display: flex;
  gap: 9px;
  margin: 16px 0 0;
  padding: 11px 12px;
  border-radius: 6px;
  background: #f0f8f6;
  color: #166453;
  font-size: 13px;
  line-height: 1.5;
}

.checkout-payment-form {
  display: grid;
  gap: 16px;
  margin-top: 20px;
}

.checkout-contact-upgrade {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.checkout-contact-upgrade > strong {
  color: var(--text);
  font-size: 14px;
}

.checkout-contact-upgrade > p {
  margin: 7px 0 14px;
  color: var(--text-2);
  font-size: 13px;
  line-height: 1.55;
}

.checkout-contact-actions {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.72fr);
  gap: 8px;
}

.checkout-contact-actions .button {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding-inline: 10px;
  font-size: 12px;
}

.checkout-consent {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  color: var(--text-2);
  font-size: 12px;
  line-height: 1.55;
}

.checkout-consent input {
  flex: 0 0 auto;
  margin-top: 3px;
}

.checkout-consent a,
.checkout-support a {
  color: var(--primary-dark);
}

.checkout-pay-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  width: 100%;
}

@media (max-width: 1050px) {
  .pricing-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.checkout-pay-button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.checkout-support {
  margin: 18px 0 0;
  color: var(--text-2);
  font-size: 13px;
  text-align: center;
}

.payment-status-shell {
  width: min(620px, calc(100% - 40px));
  flex: 1 0 auto;
  margin: 0 auto;
  padding: 56px 0;
}

.payment-status-card {
  padding: 32px;
  text-align: center;
}

.payment-status-card h1 {
  margin: 6px 0 10px;
  font-size: 25px;
}

.payment-status-card > p:not(.eyebrow) {
  color: var(--text-2);
}

.payment-status-icon {
  color: var(--primary);
  font-size: 38px;
}

.payment-status-card.is-paid .payment-status-icon {
  color: #118267;
}

.payment-status-card.is-failed .payment-status-icon,
.payment-status-card.is-cancelled .payment-status-icon {
  color: #b64040;
}

.payment-order-facts {
  margin: 24px 0;
  text-align: left;
}

.payment-status-actions {
  display: flex;
  justify-content: center;
  gap: 10px;
}

.packages-section {
  margin-bottom: 18px;
  padding: 22px;
}

.packages-list {
  display: grid;
  gap: 8px;
}

.package-row {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--text);
  text-decoration: none;
}

.package-row.is-inactive {
  opacity: 0.62;
}

.package-row-icon {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 6px;
  background: #edf7f5;
  color: #08785f;
}

.package-row div {
  display: grid;
  gap: 3px;
}

.package-row small,
.package-row > span:last-child,
.packages-empty {
  color: var(--text-2);
  font-size: 12px;
}

@media (max-width: 760px) {
  .checkout-page-shell,
  .packages-page-shell,
  .payment-status-shell {
    width: min(100% - 24px, 620px);
    padding: 24px 0 40px;
  }

  .checkout-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .checkout-panel,
  .payment-status-card,
  .packages-section {
    padding: 18px;
  }

  .checkout-heading h1 {
    font-size: 25px;
  }

  .checkout-contact-actions {
    grid-template-columns: minmax(0, 1fr);
  }

  .payment-status-actions {
    flex-direction: column-reverse;
  }

  .package-row {
    grid-template-columns: 34px minmax(0, 1fr);
  }

  .package-row > span:last-child {
    grid-column: 2;
  }
}

.feedback-container {
  max-width: 760px;
}

.feedback-intro {
  margin: 0 0 18px;
  color: var(--text-2);
  line-height: 1.65;
}

.feedback-form {
  display: grid;
  gap: 16px;
  margin-top: 18px;
}

.feedback-field {
  display: grid;
  gap: 8px;
}

.feedback-field span {
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
}

.feedback-field input,
.feedback-field select,
.feedback-field textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 11px 12px;
  background: #fff;
  color: var(--text);
  font: inherit;
}

.feedback-field textarea {
  min-height: 132px;
  resize: vertical;
  line-height: 1.6;
}

.feedback-field input:focus,
.feedback-field select:focus,
.feedback-field textarea:focus {
  outline: 2px solid rgba(37, 99, 235, 0.18);
  border-color: var(--primary);
}

.report-btn {
  color: var(--muted);
}

.report-btn:hover {
  background: #fff7ed;
  color: #b45309;
}

.question-report-modal {
  position: fixed;
  inset: 0;
  z-index: 1500;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(15, 23, 42, 0.42);
}

.question-report-modal[hidden] {
  display: none;
}

.question-report-dialog {
  width: min(560px, 100%);
  max-height: calc(100vh - 40px);
  overflow: auto;
  border-radius: 10px;
  padding: 22px;
  background: #fff;
  box-shadow: 0 24px 80px rgba(15, 23, 42, 0.25);
}

.question-report-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.question-report-head h2 {
  margin: 4px 0 0;
  font-size: 22px;
  line-height: 1.25;
}

.question-report-close {
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 999px;
  background: #f1f5f9;
  color: #64748b;
  cursor: pointer;
}

.question-report-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 16px;
}

.question-report-status {
  min-height: 22px;
  margin: 10px 0 0;
  color: #475569;
  font-size: 13px;
}

.question-report-status.is-error {
  color: #b91c1c;
}

.question-report-status.is-success {
  color: #047857;
}

.scroll-to-top {
  position: fixed;
  right: 20px;
  bottom: 24px;
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 18px;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 200ms ease, transform 200ms ease, background var(--t);
}

.scroll-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.home-layout,
.home-content,
.home-content .exam-list {
  display: grid;
  gap: 14px;
}

.resume-panel {
  position: relative;
  display: grid;
  gap: 12px;
  padding: 16px;
  overflow: hidden;
  border: 1px solid #b9d5f3;
  border-radius: var(--radius);
  background:
    radial-gradient(circle at top right, rgba(53, 124, 214, 0.12), transparent 32%),
    linear-gradient(180deg, #f5faff 0%, #ffffff 100%);
  box-shadow: 0 14px 30px rgba(30, 64, 110, 0.09);
}

.resume-panel::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: linear-gradient(180deg, #1f7ae0 0%, #7fb6ee 100%);
}

.resume-main {
  min-width: 0;
}

.resume-title {
  display: block;
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1.4;
}

.resume-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  margin: 6px 0 0;
  color: var(--text-2);
  font-size: 0.77rem;
  line-height: 1.45;
}

.resume-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.resume-panel-single {
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
}

.resume-icon {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: var(--radius-sm);
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-size: 1.1rem;
}

.home-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 2px;
}

.home-heading h1 {
  margin: 0;
  font-size: clamp(1.25rem, 2.3vw, 1.75rem);
  line-height: 1.18;
  font-weight: 700;
}

.home-count {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 600;
  white-space: nowrap;
}

.inline-alert {
  padding: 11px 13px;
  border: 1px solid var(--warning-bg);
  border-radius: var(--r-sm);
  background: var(--warning-bg);
  color: var(--warning);
  font-size: 0.86rem;
  font-weight: 700;
}

.inline-alert-soft {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  border-color: #dbe7f4;
  background: #f7fbff;
  color: var(--text);
  font-weight: 600;
  line-height: 1.6;
}

.result-page-shell {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.result-main-column {
  display: grid;
  gap: 18px;
}

.subject-hub-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.home-dashboard-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

/* Tin giáo dục là nội dung bổ trợ: nhỏ, nằm sau các lối vào luyện tập. */
.home-news-section {
  display: grid;
  gap: 12px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.home-news-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
}

.home-news-heading h2,
.home-news-heading p { margin: 0; }
.home-news-heading h2 { font-size: 1.05rem; }
.home-news-heading > a {
  color: var(--primary-dark);
  font-size: .78rem;
  font-weight: 700;
  text-decoration: none;
}

.home-news-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.home-news-item {
  display: block;
  min-width: 0;
  padding: 12px;
  border: 1px solid #d9e2ec;
  border-radius: 7px;
  background: #fff;
}

.home-news-item > div { min-width: 0; }
.home-news-item span,
.home-news-item small {
  display: block;
  color: var(--muted);
  font-size: .68rem;
  line-height: 1.35;
}
.home-news-item h3 {
  margin: 3px 0 5px;
  font-size: .8rem;
  line-height: 1.45;
  letter-spacing: 0;
}
.home-news-item h3 a {
  color: var(--text);
  text-decoration: none;
}
.home-news-item h3 a:hover { color: var(--primary-dark); }

/* ===== EDUCATION NEWS ===== */
.news-shell {
  width: min(100% - 32px, 1040px);
  margin: 0 auto;
  padding: 30px 0 56px;
}

.news-index-heading {
  max-width: 720px;
  margin-bottom: 22px;
}
.news-index-heading h1 { margin: 0; font-size: 1.75rem; letter-spacing: 0; }
.news-index-heading p:not(.eyebrow) { margin: 7px 0 0; color: var(--muted); }

.news-index-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.news-index-item {
  display: flex;
  min-width: 0;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #fff;
}
.news-index-cover {
  display: block;
  overflow: hidden;
  aspect-ratio: 1200 / 630;
  border-bottom: 1px solid var(--line);
  background: var(--surface-soft);
}
.news-index-cover img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 180ms ease;
}
.news-index-item:hover .news-index-cover img { transform: scale(1.015); }
.news-index-copy {
  display: flex;
  min-width: 0;
  flex: 1;
  flex-direction: column;
  padding: 16px;
}
.news-index-copy h2 { margin: 5px 0 7px; font-size: 1.08rem; line-height: 1.42; letter-spacing: 0; }
.news-index-copy h2 a {
  color: var(--text);
  text-decoration: none;
}
.news-index-copy h2 a:hover { color: var(--primary-dark); }
.news-index-copy p {
  display: -webkit-box;
  overflow: hidden;
  margin: 0 0 10px;
  color: var(--text-2);
  font-size: .88rem;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}
.news-index-copy > small { margin-top: auto; color: var(--muted); }

.news-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 7px;
  color: var(--muted);
  font-size: .76rem;
  font-weight: 700;
}
.news-meta > span:first-child { color: var(--primary-dark); }
.news-expired { padding: 2px 6px; border-radius: 4px; background: #fff3e4; color: #8a4b08 !important; }
.news-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-top: 22px;
  font-size: .86rem;
}
.news-pagination a { color: var(--primary-dark); font-weight: 700; text-decoration: none; }

.news-detail { width: min(100%, 760px); margin: 0 auto; }
.news-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 20px;
  color: var(--primary-dark);
  font-weight: 700;
  text-decoration: none;
}
.news-detail h1 { margin: 10px 0; font-size: clamp(1.7rem, 3vw, 2rem); line-height: 1.32; letter-spacing: 0; }
.news-detail-lead { margin: 0 0 22px; color: var(--text-2); font-size: 1rem; line-height: 1.72; }
.news-detail-cover { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border-radius: 7px; }
.news-detail-body { margin-top: 28px; font-size: 1rem; line-height: 1.85; }
.news-detail-body p { margin: 0 0 1.15em; }
.news-source {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 32px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.news-source > div { display: grid; gap: 3px; }
.news-source span { color: var(--muted); font-size: .8rem; }
.news-source a { flex: 0 0 auto; color: var(--primary-dark); font-size: .86rem; font-weight: 700; text-decoration: none; }

@media (max-width: 760px) {
  .home-news-list { grid-template-columns: 1fr; }
  .news-shell { width: min(100% - 20px, 1040px); padding-top: 20px; }
  .news-index-list { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .news-index-copy { padding: 14px; }
  .news-index-copy h2 { margin-top: 3px; font-size: .9rem; }
  .news-index-copy p {
    display: -webkit-box;
    overflow: hidden;
    font-size: .8rem;
    line-height: 1.55;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
  }
  .news-index-copy > small { display: block; margin-top: 5px; font-size: .68rem; }
  .news-detail h1 { font-size: 1.55rem; line-height: 1.36; }
  .news-detail-body { margin-top: 24px; font-size: .96rem; line-height: 1.8; }
  .news-source { align-items: flex-start; flex-direction: column; }
}

.home-product-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  align-items: start;
}

.home-product-item {
  display: grid;
  gap: 8px;
  min-width: 0;
}

.home-product-card {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) 20px;
  align-items: center;
  gap: 12px;
  min-height: 84px;
  padding: 14px 16px;
  border: 1px solid #cfe0f3;
  border-radius: var(--radius);
  background: #fff;
  color: var(--text);
  font: inherit;
  text-align: left;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease, box-shadow 160ms ease, transform 100ms ease;
}

.home-product-card:hover,
.home-product-card.is-open {
  border-color: #8db9ec;
  background: #f8fbff;
  box-shadow: 0 8px 20px rgba(31, 89, 158, 0.09);
}

.home-product-card > i:first-child {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 19px;
}

.home-product-card > span {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.home-product-card strong {
  font-size: 0.94rem;
}

.home-product-card small {
  color: var(--text-2);
  font-size: 0.76rem;
  line-height: 1.4;
}

.home-product-card-link > i:last-child {
  color: var(--primary-dark);
  font-size: 0.9rem;
}

.school-catalog-filters {
  display: grid;
  grid-template-columns: repeat(4, minmax(120px, 1fr)) minmax(180px, 1.5fr) auto auto;
  align-items: end;
  gap: 10px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.school-catalog-filters label {
  display: grid;
  gap: 5px;
  min-width: 0;
  color: var(--text-2);
  font-size: 0.68rem;
  font-weight: 700;
}

.school-catalog-filters select,
.school-catalog-filters input {
  width: 100%;
  min-width: 0;
  height: 36px;
  padding: 0 9px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 0.78rem;
}

.school-catalog-submit {
  height: 36px;
  gap: 6px;
  white-space: nowrap;
}

.school-catalog-clear {
  display: inline-flex;
  align-items: center;
  height: 36px;
  color: var(--text-2);
  font-size: 0.75rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.home-exam-classification {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin: 5px 0 0;
}

.home-exam-classification span {
  padding: 2px 6px;
  border: 1px solid #d5e2f0;
  border-radius: 4px;
  background: #f7faff;
  color: var(--text-2);
  font-size: 0.64rem;
  font-weight: 700;
  line-height: 1.35;
}

.catalog-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--text-2);
  font-size: 0.78rem;
  font-weight: 700;
}

.catalog-pagination a {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--surface);
  color: var(--primary-dark);
  text-decoration: none;
}

.home-product-chevron {
  color: var(--muted);
  transition: transform 160ms ease;
}

.home-product-card.is-open .home-product-chevron {
  color: var(--primary-dark);
  transform: rotate(180deg);
}

.home-product-card:active,
.home-subject-link:active,
.home-subject-exam:active,
.home-toeic-actions > a:active,
.home-toeic-actions > button:active {
  transform: translateY(1px);
}

.home-product-card:focus-visible,
.home-subject-link:focus-visible,
.home-subject-exam:focus-visible,
.home-subject-more:focus-visible,
.home-toeic-actions > a:focus-visible,
.home-toeic-actions > button:focus-visible {
  outline: 3px solid rgba(42, 116, 209, 0.24);
  outline-offset: 2px;
}

.home-product-panel {
  padding: 12px;
  border: 1px solid #cfe0f3;
  border-radius: var(--radius);
  background: #f8fbff;
  box-shadow: var(--shadow-sm);
}

.home-product-panel[hidden] {
  display: none;
}

.home-overview-section {
  display: grid;
  gap: 10px;
  padding: 4px 0;
  scroll-margin-top: 74px;
}

.home-latest-section {
  padding-top: 0;
}

.home-mobile-latest {
  display: none;
}

.home-topic-section {
  display: grid;
  gap: 14px;
}

.home-topic-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  padding-top: 2px;
}

.home-topic-heading h2,
.home-topic-heading p {
  margin: 0;
}

.home-topic-heading h2 {
  font-size: 1.08rem;
}

.home-topic-heading > span {
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.5;
  text-align: right;
}

.home-topic-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.home-topic-card {
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 10px;
  min-width: 0;
  padding: 14px;
  border: 1px solid #d4e1ef;
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow-xs);
}

.home-topic-card-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.home-topic-card-heading > div {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
}

.home-topic-card-heading h3 {
  margin: 0;
  overflow: hidden;
  font-size: 0.86rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.home-topic-card-heading > span {
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 700;
  white-space: nowrap;
}

.home-topic-icon {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 6px;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 0.84rem;
}

.home-topic-exams {
  display: grid;
  gap: 6px;
}

.home-topic-exam {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 24px;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 7px 8px 7px 10px;
  border: 1px solid #e1eaf4;
  border-radius: var(--radius-sm);
  background: #fbfdff;
  color: var(--text);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: border-color 140ms ease, background 140ms ease, transform 100ms ease;
}

.home-topic-exam:hover {
  border-color: #a9c9ed;
  background: #f3f8ff;
}

.home-topic-exam:active {
  transform: translateY(1px);
}

.home-topic-exam:focus-visible,
.home-topic-more:focus-visible {
  outline: 3px solid rgba(42, 116, 209, 0.24);
  outline-offset: 2px;
}

.home-topic-exam > span {
  display: -webkit-box;
  min-width: 0;
  overflow: hidden;
  font-size: 0.73rem;
  font-weight: 700;
  line-height: 1.42;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.home-topic-exam > i {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 6px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.72rem;
}

.home-topic-more {
  display: inline-flex;
  align-items: center;
  justify-self: end;
  gap: 5px;
  padding: 2px;
  color: var(--primary-dark);
  font-size: 0.72rem;
  font-weight: 700;
  text-decoration: none;
}

.home-topic-more:hover {
  text-decoration: underline;
}

@media (min-width: 1280px) {
  .home-topic-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.home-overview-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 12px;
}

.home-overview-heading h2,
.home-overview-heading p {
  margin: 0;
}

.home-overview-heading h2 {
  margin-top: 2px;
  font-size: 1rem;
}

.home-overview-heading > a {
  color: var(--primary-dark);
  font-size: 0.78rem;
  font-weight: 700;
  text-decoration: none;
}

.home-subject-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.home-subject-item {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.home-subject-item.is-open {
  grid-column: 1 / -1;
}

.home-subject-link {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 14px;
  align-items: center;
  gap: 7px;
  min-height: 46px;
  padding: 9px 11px;
  border: 1px solid #dce8f5;
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--text);
  font: inherit;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
  transition: border-color 140ms ease, background 140ms ease, box-shadow 140ms ease, transform 100ms ease;
}

.home-subject-link:hover,
.home-subject-link.is-open {
  border-color: #8db9ec;
  background: #f3f8ff;
  box-shadow: 0 3px 10px rgba(31, 89, 158, 0.08);
}

.home-subject-link strong {
  overflow: hidden;
  font-size: 0.8rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.home-subject-chevron {
  color: #8aa0b8;
  font-size: 0.68rem;
  transition: transform 140ms ease;
}

.home-subject-link.is-open .home-subject-chevron {
  color: var(--primary-dark);
  transform: rotate(180deg);
}

.home-subject-panel {
  display: grid;
  gap: 6px;
  padding: 8px;
  border-left: 3px solid #8db9ec;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: #fff;
}

.home-subject-panel[hidden] {
  display: none;
}

.home-subject-exam {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 24px;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 7px 9px;
  border: 1px solid #e1eaf4;
  border-radius: 5px;
  background: #fbfdff;
  color: var(--text);
  font: inherit;
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1.4;
  text-align: left;
  cursor: pointer;
  transition: border-color 140ms ease, background 140ms ease, transform 100ms ease;
}

.home-subject-exam:hover {
  border-color: #a9c9ed;
  background: #f3f8ff;
}

.home-subject-exam > span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.home-subject-exam > i {
  color: var(--primary);
  text-align: center;
}

.home-subject-more {
  justify-self: end;
  padding: 5px 2px;
  color: var(--primary-dark);
  font-size: 0.74rem;
  font-weight: 700;
  text-decoration: none;
}

.home-subject-more:hover {
  text-decoration: underline;
}

.home-subject-empty {
  margin: 0;
  padding: 8px;
  color: var(--muted);
  font-size: 0.75rem;
}

.home-toeic-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.home-toeic-actions > a,
.home-toeic-actions > button {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 9px 11px;
  border: 1px solid #dce8f5;
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--text);
  font: inherit;
  font-size: 0.77rem;
  font-weight: 700;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
  transition: border-color 140ms ease, background 140ms ease, transform 100ms ease;
}

.home-toeic-actions > a:hover,
.home-toeic-actions > button:hover {
  border-color: #a9c9ed;
  background: #f3f8ff;
}

.home-toeic-actions i {
  color: var(--primary);
  font-size: 0.92rem;
}

.home-latest-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
}

.home-latest-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 30px;
  align-items: center;
  gap: 10px;
  min-height: 62px;
  padding: 10px 12px;
  border: 1px solid #dce8f5;
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--text);
  text-decoration: none;
}

.home-latest-item > span {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 20px;
  align-items: center;
  gap: 3px 7px;
  min-width: 0;
}

.home-latest-item > span > small {
  grid-column: 1;
  color: var(--primary-dark);
  font-size: 0.66rem;
  font-weight: 700;
}

.home-latest-item strong {
  grid-column: 1;
  display: -webkit-box;
  overflow: hidden;
  font-size: 0.76rem;
  line-height: 1.4;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.home-latest-item > i {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 7px;
  background: var(--primary);
  color: #fff;
}

.subject-hub-card {
  position: relative;
  display: grid;
  gap: 12px;
  padding: 16px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.subject-hub-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: linear-gradient(180deg, #1f7ae0 0%, #7fb6ee 100%);
}

.subject-hub-preview-list {
  display: grid;
  gap: 8px;
}

.subject-hub-preview-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid #e3edf8;
  border-radius: var(--r-sm);
  background: linear-gradient(180deg, #fbfdff 0%, #f7fbff 100%);
  box-shadow: inset 2px 0 0 #d6e8fb;
  text-decoration: none;
}

.subject-hub-preview-title {
  display: -webkit-box;
  min-width: 0;
  overflow: hidden;
  color: var(--text);
  font-size: 0.8rem;
  font-weight: 700;
  line-height: 1.36;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  text-overflow: ellipsis;
}

.subject-hub-preview-meta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  color: var(--text-2);
  font-size: 0.71rem;
  font-weight: 700;
}

.subject-hub-preview-meta span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.subject-hub-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 2px;
  padding-top: 10px;
  border-top: 1px solid #e7eef7;
}

.subject-hub-caption {
  min-width: 0;
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1.3;
}

.subject-hub-caption span {
  color: #6f7f93;
  font-size: 0.78rem;
  font-weight: 600;
}

.subject-hub-link {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 10px;
  border: 1px solid #c9dbef;
  border-radius: 999px;
  background: #edf5fd;
  color: var(--primary-dark);
  font-size: 0.76rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

/* Card danh sách đề dùng grid thay vì flex để phần tiêu đề luôn giữ được cột riêng.
   Đây là chỗ đã từng làm tên bài thi biến mất khi phần meta bên phải chiếm quá rộng. */
.home-content .exam-card {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  min-height: 56px;
  overflow: hidden;
  padding: 11px 14px;
  border: 1px solid #cbddf0;
  border-radius: var(--r-sm);
  background:
    radial-gradient(circle at top right, rgba(116, 164, 228, 0.08), transparent 28%),
    linear-gradient(180deg, #fdfefe 0%, #f8fbff 100%);
  box-shadow:
    inset 3px 0 0 #cfe3fb,
    0 8px 20px rgba(30, 64, 110, 0.06);
}

.home-exam-main {
  min-width: 0;
}

.exam-access-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: fit-content;
  margin-top: 5px;
  padding: 2px 7px;
  border: 1px solid #bdd0e7;
  border-radius: 999px;
  color: #35516f;
  background: #f4f8fc;
  font-size: 11px;
  font-weight: 700;
  line-height: 1.35;
}

.home-exam-facts .exam-access-badge {
  height: 24px;
  margin-top: 0;
  padding-inline: 8px;
  white-space: nowrap;
}

.exam-access-badge.is-free {
  border-color: #add9c6;
  color: #176346;
  background: #eef9f4;
}

.exam-access-badge.is-account {
  border-color: #b8d8d3;
  color: #315e59;
  background: #f2f8f7;
}

.exam-access-badge.is-premium {
  border-color: #e4ca87;
  color: #785814;
  background: #fff9e9;
}

.exam-access-badge.is-icon-only {
  width: 24px;
  height: 24px;
  padding: 0;
  border-radius: 50%;
}

.exam-access-panel {
  text-align: center;
}

.exam-access-panel h2 {
  margin: 8px 0;
  font-size: 20px;
}

.exam-access-icon {
  color: #256fce;
  font-size: 30px;
}

.home-content .exam-card h2 {
  display: block;
  margin: 0;
  padding: 1px 0 2px;
  color: var(--text);
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.42;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.home-content .exam-card h2.is-long {
  font-size: 0.82rem;
  line-height: 1.38;
}

.home-content .exam-card h2.is-very-long {
  font-size: 0.75rem;
  line-height: 1.34;
}

.home-exam-side {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.home-exam-facts,
.home-icon-actions {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  flex-wrap: wrap;
}

.home-exam-fact {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  min-width: 36px;
  height: 24px;
  padding: 0 6px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--surface-subtle);
  color: var(--text);
  font-size: 0.7rem;
  font-weight: 700;
  line-height: 1;
}

.home-icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 31px;
  height: 31px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--surface);
  color: var(--text-2);
  font-size: 0.9rem;
  text-decoration: none;
  box-shadow: var(--shadow-xs);
}

.home-icon-button.primary {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

.sidebar-filter-panel {
  display: grid;
  padding: 8px 10px 18px;
}

.sidebar-filter-primary,
.sidebar-filter-level {
  display: grid;
  gap: 3px;
}

.sidebar-filter-section {
  display: block;
  padding: 11px 8px 2px;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
}

.sidebar-filter-grade-button,
.sidebar-filter-subject {
  display: flex;
  align-items: center;
  width: 100%;
  min-height: 32px;
  padding: 7px 10px;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--text-2);
  font: inherit;
  font-size: 0.86rem;
  font-weight: 600;
  line-height: 1.25;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
}

.sidebar-filter-grade-button,
.sidebar-filter-subject {
  justify-content: space-between;
  gap: 8px;
}

.sidebar-filter-grade-meta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.sidebar-filter-count {
  min-width: 18px;
  padding: 0 5px;
  border: 1px solid #edf1f5;
  border-radius: 999px;
  background: #fafbfc;
  color: #111827;
  font-size: 0.65rem;
  font-weight: 700;
  line-height: 1.42;
  text-align: center;
}

.sidebar-filter-grade-button i {
  color: var(--muted);
  font-size: 0.75rem;
  transition: transform var(--t), color var(--t);
}

.sidebar-product-link i {
  font-size: 0.9rem;
}

.sidebar-filter-grade-button:hover,
.sidebar-filter-subject:hover,
.sidebar-filter-grade-button.active,
.sidebar-filter-subject.active,
.sidebar-filter-grade.is-open .sidebar-filter-grade-button {
  border-color: #9fc2ee;
  background: var(--primary-light);
  color: var(--primary-dark);
}

.sidebar-filter-grade.is-open .sidebar-filter-grade-button i {
  color: var(--primary-dark);
  transform: rotate(90deg);
}

.sidebar-filter-submenu {
  display: none;
  align-content: start;
  gap: 3px;
  margin: 2px 0 5px 10px;
  padding: 3px 0 3px 10px;
  border-left: 1px solid var(--line);
}

.sidebar-filter-grade.is-open .sidebar-filter-submenu {
  display: grid;
}

.exam-intent-modal {
  position: fixed;
  inset: 0;
  z-index: 240;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(15, 23, 42, 0.26);
}

.exam-intent-modal[hidden],
.toeic-practice-fields[hidden],
.toeic-practice-field[hidden],
.exam-intent-tag[hidden],
.exam-intent-description[hidden],
.exam-intent-mode-picker[hidden],
.exam-intent-mode-note[hidden] {
  display: none;
}

.toeic-practice-form,
.toeic-practice-fields,
.toeic-practice-field {
  display: grid;
}

.toeic-practice-form {
  gap: 14px;
}

.toeic-practice-fields {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.toeic-practice-field {
  gap: 6px;
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 700;
}

.toeic-practice-field select {
  width: 100%;
  min-height: 42px;
  padding: 0 34px 0 11px;
  border: 1px solid #d6e3f1;
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  font: inherit;
  font-weight: 500;
}

.toeic-practice-summary {
  display: grid;
  gap: 4px;
  padding: 11px 12px;
  border-left: 3px solid var(--primary);
  background: #f4f8fd;
  color: var(--text-2);
}

.toeic-practice-summary span {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--primary-dark);
  font-size: 0.84rem;
}

.toeic-practice-summary small {
  font-size: 0.76rem;
  line-height: 1.5;
}

.sidebar-toeic-menu .sidebar-filter-subject i {
  color: var(--muted);
  font-size: 0.82rem;
}

.exam-intent-dialog {
  width: 100%;
  max-width: 560px;
  display: grid;
  gap: 14px;
  padding: 20px;
  border: 1px solid #d9e7f7;
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 18px 48px rgba(15, 23, 42, 0.18);
}

.exam-intent-eyebrow,
.exam-intent-description {
  margin: 0;
}

.exam-intent-eyebrow {
  color: var(--primary-dark);
  font-size: 0.76rem;
  font-weight: 700;
}

.exam-intent-dialog h2 {
  margin: -4px 0 0;
  font-size: 1.08rem;
  line-height: 1.36;
}

.exam-intent-description {
  color: var(--text-2);
  font-size: 0.88rem;
  line-height: 1.6;
  white-space: pre-wrap;
}

.exam-intent-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.exam-intent-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-height: 28px;
  padding: 4px 10px;
  border: 1px solid #dfe9f4;
  border-radius: 999px;
  background: #f7fbff;
  color: #5e738a;
  font-size: 0.76rem;
  font-weight: 700;
}

.exam-intent-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.exam-intent-start-form {
  display: grid;
  gap: 12px;
}

.exam-intent-mode-picker {
  margin: 0;
}

.exam-intent-mode-note {
  margin: 0;
  padding: 10px 12px;
  border-left: 3px solid var(--primary);
  background: #f4f8fd;
  color: var(--text-2);
  font-size: 13px;
  line-height: 1.55;
}

.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.auth-card {
  width: min(520px, 100%);
  display: grid;
  gap: 16px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow-md);
}

.auth-card h1,
.auth-copy {
  margin: 0;
}

.auth-copy {
  color: var(--text-2);
  line-height: 1.65;
}

.auth-form {
  display: grid;
  gap: 14px;
}

.auth-form label {
  display: grid;
  gap: 6px;
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 700;
}

.auth-form input[type="email"],
.auth-form input[type="password"] {
  width: 100%;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid #cbd9e8;
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  font: inherit;
}

.auth-form > .button {
  width: 100%;
}

.auth-field-error {
  margin-top: -9px;
  color: var(--danger);
  font-size: 0.78rem;
  font-weight: 600;
}

.auth-policy-note {
  margin: -2px 0 0;
  color: var(--text-3);
  font-size: 0.78rem;
  line-height: 1.55;
  text-align: center;
}

.auth-secondary-links,
.auth-switch {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 16px;
  margin: 0;
  font-size: 0.86rem;
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-3);
  font-size: 0.8rem;
}

.auth-divider::before,
.auth-divider::after {
  content: "";
  height: 1px;
  flex: 1;
  background: var(--line);
}

.google-login-shell {
  display: grid;
  justify-items: center;
  padding-top: 4px;
}

.auth-field {
  display: grid;
  gap: 6px;
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 700;
}

.auth-field input {
  width: 100%;
  min-height: 42px;
  padding: 0 12px;
  border: 1px solid #d6e3f1;
  border-radius: 10px;
  background: #fff;
  color: var(--text);
  font: inherit;
}

.field-error {
  color: var(--danger);
  font-size: 0.8rem;
  font-weight: 700;
}

.auth-submit {
  width: 100%;
}

.auth-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (max-width: 900px) {
  .home-dashboard-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .home-product-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .home-topic-section {
    display: none;
  }

  .home-mobile-latest {
    display: grid;
  }

  .home-latest-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .school-catalog-filters {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .school-catalog-search {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .exam-intent-modal {
    padding: 14px;
  }

  .toeic-practice-fields {
    grid-template-columns: 1fr;
  }

  .home-product-grid,
  .home-latest-list {
    grid-template-columns: 1fr;
  }

  .home-product-card {
    min-height: 72px;
    padding: 11px 12px;
  }

  .school-catalog-filters {
    grid-template-columns: minmax(0, 1fr);
  }

  .school-catalog-search {
    grid-column: auto;
  }

  .school-catalog-submit,
  .school-catalog-clear {
    justify-content: center;
    width: 100%;
  }

  .home-subject-grid,
  .home-toeic-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .home-subject-link {
    grid-template-columns: minmax(0, 1fr) 12px;
  }

  .home-subject-link span {
    display: none;
  }

  .home-subject-exam > span {
    white-space: normal;
  }

  .history-item {
    grid-template-columns: 34px minmax(0, 1fr) auto;
    gap: 9px;
    padding: 11px;
  }

  .history-item-icon {
    width: 34px;
    height: 34px;
  }

  .history-score {
    grid-column: 3;
    grid-row: 1;
  }

  .history-detail-button,
  .history-summary-only {
    grid-column: 2 / -1;
    justify-self: start;
  }

  .history-item h2 {
    white-space: normal;
  }

  .toeic-result-part-tabs {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .toeic-result-layout .result-nav-progress {
    display: none;
  }
  .inline-alert-soft {
    align-items: stretch;
    flex-direction: column;
  }

  /* Header mobile vẫn giữ một hàng ngang để hamburger + brand không bị vỡ layout. */
  .app-header {
    gap: 10px;
    height: 56px;
    padding: 0 14px;
  }

  .app-header-right {
    width: auto;
  }

  .sidebar-account-actions {
    width: 100%;
  }

  .app-header-right > * {
    flex: 0 0 auto;
  }

  .sidebar-account-actions > * {
    flex: 1;
  }

  .brand {
    gap: 6px;
  }

  .brand-mark {
    width: 32px;
    height: 32px;
    flex-basis: 32px;
  }

  .brand-wordmark {
    font-size: 19px;
  }

  .page-shell {
    width: min(100% - 24px, 1060px);
    padding: 22px 0 48px;
  }

  .site-footer {
    gap: 8px;
    padding: 6px 20px 20px;
    font-size: 11px;
  }

  .site-footer-links {
    gap: 7px 14px;
    font-size: 11.5px;
  }

  .policy-container {
    padding: 22px 18px;
    border-radius: 12px;
  }

  .policy-content h1 {
    margin-bottom: 18px;
  }

  .pricing-page-shell {
    width: min(100% - 24px, 980px);
    padding: 28px 0 48px;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .pricing-card,
  .pricing-notes {
    padding: 22px 18px;
  }

  .legal-details {
    grid-template-columns: 1fr;
  }

  .legal-details dt {
    border-bottom: 0;
    padding-bottom: 4px;
  }

  .legal-details dd {
    padding-top: 4px;
  }

  .subject-hub-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .subject-hub-preview-item,
  .home-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .resume-button {
    width: auto;
  }

  .resume-panel-single {
    grid-template-columns: auto minmax(0, 1fr) auto;
  }

  .resume-panel-single .resume-button {
    width: 40px;
    height: 40px;
    justify-content: center;
    padding: 0;
  }

  .resume-panel-single .resume-button span {
    display: none;
  }

  .home-count {
    white-space: normal;
  }

  .home-content .exam-card {
    grid-template-columns: 1fr;
    align-items: stretch;
    gap: 10px;
    padding: 12px;
  }

  .home-exam-side {
    align-items: center;
    justify-content: space-between;
    margin-left: 0;
    width: 100%;
  }

  .home-exam-fact.fact-questions,
  .home-exam-fact.fact-duration {
    display: none;
  }

  .result-hero h1 {
    font-size: 30px;
  }

  .result-lock-copy,
  .sidebar-account-copy,
  .sidebar-account-email {
    font-size: 0.88rem;
    line-height: 1.58;
  }

  .question-card {
    padding: 12px;
  }

  .result-question-heading {
    padding: 8px 9px 8px 11px;
  }

  .form-actions,
  .form-actions.centered {
    flex-direction: column;
    align-items: stretch;
  }

  .form-actions > * {
    width: 100%;
  }

  .result-choice-row {
    grid-template-columns: 28px minmax(0, 1fr);
    column-gap: 10px;
    padding: 10px;
  }

  .result-choice-row > .result-answer-badge {
    grid-column: 2;
    justify-self: start;
  }

  .exam-intent-actions {
    flex-direction: column-reverse;
  }

  .result-page-shell {
    grid-template-columns: 1fr;
    gap: 14px;
  }
}
.exam-preview-card {
  max-width: 760px;
  margin: 22px auto 0;
  padding: clamp(22px, 4vw, 36px);
  border: 1px solid #dce5ef;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 12px 32px rgba(25, 53, 80, 0.07);
}

.exam-preview-card p {
  margin: 0;
  color: #5b6b7f;
  line-height: 1.75;
}

.exam-start-form {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 24px;
}

.toeic-mode-picker {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  width: 100%;
  margin: 0 0 8px;
  padding: 0;
  border: 0;
}

.toeic-mode-picker legend {
  grid-column: 1 / -1;
  margin-bottom: 2px;
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
}

.toeic-mode-option {
  position: relative;
  cursor: pointer;
}

.toeic-mode-option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.toeic-mode-option > span {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 2px 8px;
  min-height: 78px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
}

.toeic-mode-option i {
  grid-row: 1 / 3;
  color: var(--primary);
  font-size: 20px;
}

.toeic-mode-option strong {
  font-size: 14px;
}

.toeic-mode-option small {
  color: var(--text-2);
  font-size: 12px;
  line-height: 1.45;
}

.toeic-mode-option input:checked + span {
  border-color: var(--primary);
  background: var(--primary-soft);
  box-shadow: 0 0 0 1px var(--primary);
}

.home-icon-action-form {
  display: contents;
}

.vocabulary-audio-row {
  display: flex;
  margin: 8px 0 12px;
}

.vocabulary-audio-row audio {
  width: min(100%, 320px);
  height: 38px;
}

.vocabulary-result-actions form {
  display: contents;
}

@media (max-width: 560px) {
  .vocabulary-result-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .vocabulary-result-actions .button {
    width: 100%;
  }
}

@media (max-width: 560px) {
  .exam-start-form {
    align-items: stretch;
    flex-direction: column-reverse;
  }

  .toeic-mode-picker {
    grid-template-columns: 1fr;
  }

  .toeic-mock-player,
  .toeic-mock-player-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .toeic-mock-player-actions .button {
    width: 100%;
  }
}

/* THPT: share the existing exam flow, separate topic drills from full exams. */
.thpt-study-picker { margin-bottom: 24px; }
.thpt-study-tabs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.thpt-study-tabs a { display: flex; align-items: center; gap: 12px; padding: 18px; border: 1px solid #dbe3ec; border-radius: 14px; background: #fff; color: #334155; text-decoration: none; }
.thpt-study-tabs a.is-active { border-color: #2563eb; background: #eff6ff; color: #1d4ed8; }
.thpt-study-tabs a:focus-visible { outline: 3px solid #60a5fa; outline-offset: 3px; }
.thpt-study-tabs i { font-size: 24px; }
.thpt-study-tabs strong, .thpt-study-tabs small { display: block; }
.thpt-study-tabs small { margin-top: 4px; color: #64748b; font-size: 13px; }
.thpt-study-intro, .thpt-lesson-topic { color: #64748b; font-size: 14px; line-height: 1.65; }
.thpt-topic-filter { display: flex; flex-wrap: wrap; align-items: end; }
.thpt-topic-filter label { flex: 1 1 240px; min-width: 0; }
.thpt-topic-filter select { width: 100%; max-width: 100%; }
.thpt-subject-actions { margin-bottom: 12px; }
.thpt-subject-actions:has(> :nth-child(3)) {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
@media (max-width: 600px) {
  .thpt-study-tabs { grid-template-columns: 1fr; }
  .thpt-study-tabs a { padding: 14px; }
  .thpt-topic-filter { padding: 12px; }

  .thpt-subject-actions:has(> :nth-child(3)) > a,
  .thpt-subject-actions:has(> :nth-child(3)) > button {
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    min-height: 58px;
    padding: 7px 4px;
    font-size: 0.68rem;
    line-height: 1.25;
    text-align: center;
  }
}

/* ===== Visual system refresh: calmer reading surfaces, clearer hierarchy ===== */
.app-header {
  border-bottom-color: #23354d;
  background: #16243a;
  box-shadow: 0 3px 14px rgba(15, 27, 46, 0.14);
}

.app-header .brand,
.app-header .brand-wordmark {
  color: #f8fafc;
}

.app-header .brand-dot {
  color: #45c3b7;
}

.app-header .brand-mark {
  padding: 3px;
  border-radius: 8px;
  background: #fff;
}

.app-header .nav-toggle {
  border-color: rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.07);
}

.app-header .nav-toggle:hover,
.app-header .nav-toggle:focus-visible {
  border-color: rgba(255, 255, 255, 0.42);
  background: rgba(255, 255, 255, 0.13);
}

.app-header .nav-toggle span {
  background: #e8edf3;
}

.app-header .button-muted {
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.09);
  color: #fff;
}

.app-header .button-muted:hover {
  background: rgba(255, 255, 255, 0.16);
}

.sidebar-overlay {
  background: rgba(10, 20, 34, 0.34);
}

.sidebar-account,
.take-account-card,
.result-side-panel {
  background: var(--surface-soft);
}

.sidebar-nav a:hover,
.sidebar-nav a.active,
.sidebar-filter-grade-button:hover,
.sidebar-filter-subject:hover,
.sidebar-filter-grade-button.active,
.sidebar-filter-subject.active,
.sidebar-filter-grade.is-open .sidebar-filter-grade-button {
  background: var(--primary-soft);
  color: var(--primary-dark);
}

.page-shell {
  padding-top: 30px;
}

.take-heading {
  margin-bottom: 20px;
  border-bottom-color: #d6dfe2;
}

.take-heading-facts span,
.exam-facts span {
  border-color: #dbe3e5;
  background: #f8faf9;
  color: var(--text-2);
  font-weight: 600;
}

.take-nav-inner,
.take-question-card,
.context-block,
.toeic-directions-card,
.question-card,
.result-hero,
.exam-preview-card,
.policy-container,
.pricing-card,
.history-item {
  border-color: var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-xs);
}

.take-timer-compact {
  border-color: #badbd6;
  background: #f1f8f6;
}

.take-q-header {
  padding-top: 16px;
  padding-bottom: 12px;
}

.take-q-number {
  color: #31524f;
  font-weight: 700;
}

.choice-row {
  border-color: #d8e0e3;
  background: #fff;
  transition: border-color var(--t), background var(--t), box-shadow var(--t);
}

.choice-row:hover {
  border-color: #a9c8c4;
  background: #fbfdfc;
}

.choice-row.is-selected {
  border-color: #5ca99f;
  background: #edf8f5;
  box-shadow: inset 3px 0 0 var(--primary);
}

.choice-label,
.result-choice-row .choice-label {
  border-color: #bddbd6;
  background: #edf7f5;
  color: var(--primary-dark);
}

.mark-btn {
  border-width: 1px;
}

.resume-panel {
  border-color: #bfded8;
  background: #f8fcfb;
  box-shadow: var(--shadow-xs);
}

.resume-panel::before {
  width: 3px;
  background: var(--primary);
}

.home-product-card {
  border-color: var(--line);
  background: #fff;
  box-shadow: var(--shadow-xs);
}

.home-product-card:hover,
.home-product-card.is-open {
  border-color: #8fc5bd;
  background: #f7fbfa;
  box-shadow: 0 5px 14px rgba(26, 68, 64, 0.07);
}

.home-product-card > i:first-child,
.home-topic-icon,
.home-latest-item > i {
  background: var(--primary-soft);
  color: var(--primary-dark);
}

/* Keep the selected product as clear as the selected subject below it. */
.home-product-card.is-open {
  border-color: var(--primary-dark);
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 12px rgba(15, 92, 85, 0.14);
}

.home-product-card.is-open > i:first-child {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
}

.home-product-card.is-open small,
.home-product-card.is-open .home-product-chevron {
  color: #e4f3f1;
}

.home-product-panel {
  border-color: #d5e3e1;
  background: #f7faf9;
  box-shadow: none;
}

.home-topic-card {
  border-color: var(--line);
  box-shadow: var(--shadow-xs);
}

.home-topic-exam,
.home-subject-exam,
.home-latest-item,
.home-toeic-actions > a,
.home-toeic-actions > button {
  border-color: #dce4e6;
  background: #fbfcfc;
}

.home-topic-exam:hover,
.home-subject-exam:hover,
.home-toeic-actions > a:hover,
.home-toeic-actions > button:hover {
  border-color: #a8cbc6;
  background: #f2f8f6;
}

.home-subject-link {
  border-color: #dce4e6;
}

.home-subject-link:hover,
.home-subject-link.is-open {
  border-color: #9ac9c2;
  background: #f1f8f6;
  box-shadow: none;
}

.home-subject-panel {
  border-left-color: var(--primary);
  background: #fff;
}

.home-product-card:focus-visible,
.home-subject-link:focus-visible,
.home-subject-exam:focus-visible,
.home-subject-more:focus-visible,
.home-topic-exam:focus-visible,
.home-topic-more:focus-visible,
.home-toeic-actions > a:focus-visible,
.home-toeic-actions > button:focus-visible,
.site-footer-certification:focus-visible {
  outline-color: rgba(15, 118, 110, 0.28);
}

.subject-hub-card {
  border-color: var(--line);
  box-shadow: var(--shadow-xs);
}

.subject-hub-card::before {
  width: 3px;
  background: var(--primary);
}

.subject-hub-preview-item {
  border-color: #dce4e6;
  background: #fbfcfc;
  box-shadow: none;
}

.subject-hub-link {
  border-color: #bcd8d4;
  background: #edf7f5;
}

.home-content .exam-card {
  border-color: #d8e2e4;
  background: #fff;
  box-shadow: inset 3px 0 0 #b9d7d2, var(--shadow-xs);
}

.home-icon-button.primary {
  border-color: var(--primary-dark);
  background: var(--primary);
}

.exam-access-icon {
  color: var(--primary);
}

.pricing-hero h1 {
  font-size: clamp(28px, 4vw, 38px);
}

.pricing-card.is-featured {
  border-color: #8fc5bd;
  box-shadow: 0 10px 26px rgba(20, 77, 70, 0.09);
}

.pricing-product-icon,
.pricing-badge {
  background: var(--primary-soft);
  color: var(--primary-dark);
}

.auth-shell {
  width: 100%;
  overflow-x: hidden;
  background: #eef2f3;
}

.auth-card {
  min-width: 0;
  max-width: 100%;
  padding: 28px;
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 12px 34px rgba(20, 34, 51, 0.11);
}

.auth-card h1 {
  font-size: 28px;
  line-height: 1.25;
}

.auth-form input[type="email"],
.auth-form input[type="password"],
.auth-field input {
  border-color: #ccd8dc;
  border-radius: var(--radius-sm);
}

.auth-form input:focus,
.auth-field input:focus {
  border-color: #5ca99f;
  outline: 3px solid rgba(15, 118, 110, 0.13);
}

.google-login-shell,
.google-login-shell > div {
  max-width: 100%;
}

.auth-card a {
  color: var(--primary-dark);
  text-underline-offset: 3px;
}

.feedback-field input:focus,
.feedback-field select:focus,
.feedback-field textarea:focus {
  border-color: #5ca99f;
  outline-color: rgba(15, 118, 110, 0.16);
}

.render-stage-card,
.take-submit-dialog,
.question-report-dialog,
.exam-intent-dialog {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.render-stage-dots span {
  background: var(--primary);
}

.toeic-practice-summary,
.exam-intent-mode-note {
  border-left-color: var(--primary);
  background: #f1f8f6;
}

.exam-intent-tag {
  border-color: #d7e4e2;
  background: #f7faf9;
  color: var(--text-2);
}

.thpt-study-tabs a {
  border-color: var(--line);
  border-radius: var(--radius);
}

.thpt-study-tabs a.is-active {
  border-color: #8fc5bd;
  background: var(--primary-soft);
  color: var(--primary-dark);
}

.thpt-study-tabs a:focus-visible {
  outline-color: rgba(15, 118, 110, 0.28);
}

.news-index-item,
.home-news-item {
  border-color: var(--line);
  background: #fff;
}

/* Badge nằm trong tiêu đề cần một nhịp cách rõ, tránh dính vào từ cuối. */
.home-topic-exam .exam-access-badge,
.home-subject-exam .exam-access-badge {
  margin: 0;
  vertical-align: middle;
}

.home-topic-exam .home-exam-preview-copy,
.home-subject-exam .home-exam-preview-copy {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 20px;
  align-items: center;
  gap: 6px;
  min-width: 0;
  overflow: visible;
  white-space: normal;
}

.home-topic-exam .exam-access-badge,
.home-subject-exam .exam-access-badge,
.home-latest-item .exam-access-badge {
  justify-self: end;
  width: 20px;
  height: 20px;
  padding: 0;
  border-radius: 50%;
}

.home-topic-exam .exam-access-badge > span,
.home-subject-exam .exam-access-badge > span,
.home-latest-item .exam-access-badge > span {
  display: none;
}

.home-topic-exam .exam-access-badge > i,
.home-subject-exam .exam-access-badge > i,
.home-latest-item .exam-access-badge > i {
  width: auto;
  height: auto;
  border-radius: 0;
  background: transparent;
  color: inherit;
  font-size: 0.64rem;
}

.home-latest-item .exam-access-badge {
  grid-column: 2;
  grid-row: 1 / span 2;
}

.home-topic-exam .home-exam-preview-title {
  display: -webkit-box;
  min-width: 0;
  overflow: hidden;
  font-size: 0.73rem;
  font-weight: 700;
  line-height: 1.42;
  white-space: normal;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.home-subject-exam .home-exam-preview-title {
  display: block;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Topic practice v2: one catalog surface, no fixed lesson shards. */
.home-practice-preview {
  display: grid;
  gap: 7px;
  margin: 2px 0 12px;
  padding: 10px;
  border-top: 1px solid var(--line);
}

.home-practice-preview > small,
.home-practice-preview-loading {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
}

.home-practice-preview-list {
  display: grid;
  gap: 4px;
}

.home-practice-preview-list a {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px;
  padding: 6px 4px;
  color: var(--text);
  font-size: 0.76rem;
  font-weight: 700;
  line-height: 1.35;
  text-decoration: none;
}

.home-practice-preview-list a:hover {
  color: var(--primary-dark);
}

.home-practice-preview-list a > span {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.home-practice-preview-list a strong,
.home-practice-preview-list a small {
  display: block;
}

.home-practice-preview-list a small {
  color: var(--muted);
  font-size: .68rem;
  font-weight: 600;
}

.practice-browser {
  display: grid;
  gap: 22px;
}

.practice-browser-tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #eef3f5;
}

.practice-browser-tabs button {
  display: flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
  padding: 13px 15px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--text-2);
  text-align: left;
  cursor: pointer;
}

.practice-browser-tabs button.is-active {
  border-color: #cddcdd;
  background: #fff;
  color: var(--primary-dark);
  box-shadow: 0 2px 7px rgba(28, 55, 67, 0.08);
}

.practice-browser-tabs button > i {
  font-size: 1.12rem;
}

.practice-browser-tabs strong,
.practice-browser-tabs small {
  display: block;
}

.practice-browser-tabs small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.75rem;
}

.practice-browser-panel {
  display: grid;
  gap: 16px;
}

.practice-browser-panel[hidden],
.practice-browser-status[hidden],
.practice-topic-config[hidden],
.practice-upgrade-note[hidden] {
  display: none;
}

.practice-panel-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
}

.practice-panel-heading h2 {
  margin: 3px 0 0;
  color: var(--text);
  font-size: 1.15rem;
  letter-spacing: 0;
}

.practice-access-state {
  flex: 0 0 auto;
  padding: 5px 8px;
  border: 1px solid #d6e1e3;
  border-radius: 6px;
  background: #f7faf9;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
}

.practice-access-state.is-full {
  border-color: #abd3c7;
  background: #edf8f4;
  color: #176b5d;
}

.practice-browser-status,
.practice-browser-empty {
  margin: 0;
  padding: 14px;
  border: 1px dashed var(--line);
  border-radius: 8px;
  color: var(--muted);
  text-align: center;
}

.practice-browser-status.is-error {
  border-color: #e7b8b3;
  background: #fff8f7;
  color: #9d332b;
}

.practice-topic-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
  align-items: start;
  gap: 20px;
}

.practice-topic-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.practice-topic-list button {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  min-height: 56px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  text-align: left;
  cursor: pointer;
}

.practice-topic-list button:hover,
.practice-topic-list button.is-active {
  border-color: #8fc5bd;
  background: var(--primary-soft);
}

.practice-topic-list button.is-active > i {
  color: var(--primary-dark);
  transform: translateX(2px);
}

.practice-topic-list strong,
.practice-topic-list small {
  display: block;
}

.practice-topic-list strong {
  font-size: 0.84rem;
  line-height: 1.38;
}

.practice-topic-list small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.72rem;
}

.practice-topic-config {
  position: sticky;
  top: 76px;
  display: grid;
  gap: 14px;
  padding: 16px;
  border: 1px solid #ccdadd;
  border-radius: 8px;
  background: #f8fbfb;
}

.practice-config-heading span,
.practice-topic-config label > span {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
}

.practice-config-heading h3 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.4;
}

.practice-topic-config select {
  width: 100%;
  min-height: 43px;
  padding: 0 46px 0 11px;
  border: 1px solid #cbdadd;
  border-radius: 6px;
  background-color: #fff;
  background-image:
    linear-gradient(45deg, transparent 50%, #52666b 50%),
    linear-gradient(135deg, #52666b 50%, transparent 50%);
  background-position:
    calc(100% - 18px) calc(50% - 1px),
    calc(100% - 13px) calc(50% - 1px);
  background-repeat: no-repeat;
  background-size: 5px 5px;
  color: var(--text);
  appearance: none;
}

.practice-topic-config .button {
  width: 100%;
}

.practice-upgrade-note {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 5px 8px;
  padding: 10px;
  border-left: 3px solid #d39b35;
  background: #fff9ed;
  color: #695127;
  font-size: 0.76rem;
  line-height: 1.45;
}

.checkout-benefits {
  margin-top: 16px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.checkout-benefits strong,
.checkout-benefits small {
  display: block;
}

.checkout-benefits ul {
  display: grid;
  gap: 7px;
  margin: 10px 0;
  padding: 0;
  list-style: none;
}

.checkout-benefits li {
  display: flex;
  gap: 8px;
  align-items: flex-start;
}

.checkout-benefits i {
  color: var(--primary);
}

.checkout-benefits small {
  color: var(--muted);
  line-height: 1.45;
}

.practice-upgrade-note a {
  grid-column: 2;
  color: #765817;
  font-weight: 750;
}

.practice-exam-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.practice-exam-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  min-width: 0;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.practice-exam-item h3 {
  display: -webkit-box;
  margin: 0;
  overflow: hidden;
  font-size: 0.9rem;
  line-height: 1.45;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.practice-exam-item p {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 0.73rem;
}

.practice-exam-access {
  padding-left: 7px;
  border-left: 1px solid var(--line);
}

.practice-load-more {
  justify-self: center;
  padding: 8px 12px;
  border: 0;
  background: transparent;
  color: var(--primary-dark);
  font-weight: 750;
  cursor: pointer;
}

@media (max-width: 900px) {
  .practice-topic-layout {
    grid-template-columns: 1fr;
  }

  .practice-topic-config {
    position: static;
  }

  .practice-topic-config.is-inline {
    grid-column: 1 / -1;
    width: 100%;
    margin: 2px 0 8px;
    border-color: #a9cbc7;
    background: var(--surface-soft);
    box-shadow: var(--shadow-xs);
  }
}

@media (max-width: 600px) {
  .practice-browser-tabs button {
    padding: 11px;
  }

  .practice-browser-tabs small {
    display: none;
  }

  .practice-topic-list,
  .practice-exam-list {
    grid-template-columns: 1fr;
  }

  .practice-panel-heading {
    align-items: start;
  }
}

/* Kết quả dùng viền trạng thái và nền rất nhẹ để đọc lâu không bị chói. */
.result-choice-row {
  border-color: #d8e1e3;
  background: #fff;
}

.result-choice-row .choice-label {
  display: inline-grid;
  width: 32px;
  height: 32px;
  border: 1.5px solid #82b8b1;
  background: #fff;
  color: #0b625c;
  font-size: 13px;
  line-height: 1;
  visibility: visible;
}

.result-choice-row.is-review-correct {
  border-color: #a8d7c1;
  background: #f6fbf8;
  box-shadow: inset 3px 0 0 #33926f;
}

.result-choice-row.is-review-wrong {
  border-color: #e8b2af;
  background: #fff9f8;
  box-shadow: inset 3px 0 0 #c95550;
}

.result-choice-row.is-review-empty {
  border-color: #d5dfe2;
  background: #fafcfc;
  box-shadow: inset 3px 0 0 #9aa9b2;
}

.result-choice-row.is-review-correct .choice-label {
  border-color: #67aa8b;
  color: #096348;
}

.result-choice-row.is-review-wrong .choice-label {
  border-color: #d58b87;
  color: #a83632;
}

.result-answer-badge {
  min-height: 26px;
  padding: 3px 8px;
  border: 1px solid transparent;
  border-radius: 5px;
  font-size: 11px;
}

.result-answer-badge.is-correct {
  border-color: #b6ddca;
  background: #eaf7f0;
  color: #086247;
}

.result-answer-badge.is-wrong {
  border-color: #efc1be;
  background: #fff0ef;
  color: #ad3934;
}

.result-answer-badge.is-empty {
  border-color: #d6e0e2;
  background: #f2f5f5;
  color: #53636d;
}

.result-answer-badge.is-correct-soft {
  border-color: #b6ddca;
  background: #eaf7f0;
  color: #086247;
}

.result-nav-q-box.is-correct,
.result-legend-correct::before {
  border-color: #85c5a7;
  background: #edf8f2;
  color: #096348;
}

.result-nav-q-box.is-wrong,
.result-legend-wrong::before {
  border-color: #e4a29e;
  background: #fff3f2;
  color: #a83632;
}

.result-nav-q-box.is-empty,
.result-legend-empty::before {
  border-color: #cbd7da;
  background: #f5f7f7;
  color: #586873;
}

.result-explanation {
  border: 1px solid #d6e1df;
  border-left: 3px solid #78aca5;
  background: #f7faf9;
  box-shadow: none;
}

.result-explanation > strong {
  color: #31524f;
}

.result-summary-card {
  gap: 10px;
  padding: 12px;
  background: #fff;
}

.result-summary-score {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr) auto;
  align-items: center;
  gap: 9px;
}

.result-summary-score > i {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-size: 15px;
}

.result-summary-score > span {
  display: grid;
  min-width: 0;
}

.result-summary-score small,
.result-summary-meta small {
  color: var(--muted);
  font-size: 0.66rem;
  font-weight: 600;
  line-height: 1.3;
}

.result-summary-score strong {
  color: var(--text);
  font-size: 1.25rem;
  line-height: 1.25;
}

.result-summary-score em {
  color: var(--primary-dark);
  font-size: 0.78rem;
  font-style: normal;
  font-weight: 700;
}

.result-section-scores {
  display: grid;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.result-section-scores p {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr) auto;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 7px 0;
  color: var(--text);
  font-size: 0.76rem;
  line-height: 1.3;
}

.result-section-scores p + p {
  border-top: 1px solid #edf1f2;
}

.result-section-scores b {
  color: var(--primary-dark);
  font-size: 0.72rem;
  font-weight: 700;
}

.result-section-scores span {
  color: var(--text);
  font-weight: 600;
}

.result-section-scores strong {
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 700;
  white-space: nowrap;
}

.result-summary-counts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-bottom: 1px solid var(--line);
}

.result-summary-counts > span {
  display: grid;
  justify-items: center;
  gap: 1px;
  padding: 9px 3px;
  text-align: center;
}

.result-summary-counts > span + span {
  border-left: 1px solid var(--line);
}

.result-summary-counts strong {
  font-size: 1rem;
  line-height: 1.2;
}

.result-summary-counts small {
  color: var(--muted);
  font-size: 0.62rem;
  font-weight: 600;
  line-height: 1.25;
}

.result-summary-counts .is-correct strong {
  color: #087052;
}

.result-summary-counts .is-wrong strong {
  color: #b7443f;
}

.result-summary-counts .is-empty strong {
  color: #62727c;
}

.result-summary-meta {
  display: grid;
  gap: 5px;
}

.result-summary-meta p {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  align-items: center;
  gap: 6px;
  margin: 0;
  min-height: 22px;
}

.result-summary-meta p > i {
  color: #687b84;
  font-size: 14px;
  text-align: center;
}

.result-summary-meta strong {
  overflow-wrap: anywhere;
  color: var(--text);
  font-size: 0.74rem;
  font-weight: 600;
  line-height: 1.35;
}

@media (max-width: 640px) {
  .page-shell {
    padding-top: 20px;
  }

  .auth-shell {
    padding: 12px;
  }

  .auth-card {
    gap: 14px;
    padding: 20px;
  }

  .auth-card h1 {
    font-size: 24px;
  }

  .take-q-header {
    padding: 14px 16px 11px;
  }

  .take-choices {
    padding-right: 16px;
    padding-left: 16px;
  }
}

@media (max-width: 760px) {
  .take-mobile-toolbar {
    position: sticky;
    top: 58px;
    z-index: 90;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 8px;
    min-height: 48px;
    margin-bottom: 12px;
    padding: 6px 8px 6px 12px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.97);
    box-shadow: var(--shadow-xs);
  }

  .take-mobile-timer {
    display: flex;
    align-items: baseline;
    gap: 8px;
    min-width: 0;
  }

  .take-mobile-timer span {
    color: var(--muted);
    font-size: 0.72rem;
    font-weight: 700;
  }

  .take-mobile-timer strong {
    color: var(--primary-dark);
    font-size: 1rem;
    font-variant-numeric: tabular-nums;
    line-height: 1;
  }

  .take-mobile-timer.is-warning strong {
    color: var(--warning);
  }

  .take-mobile-timer.is-danger strong {
    color: var(--danger);
  }

  .take-mobile-nav-open {
    display: flex;
    align-items: center;
    gap: 6px;
    min-height: 34px;
    padding: 5px 9px;
    border: 1px solid #b8d6d2;
    border-radius: var(--radius-sm);
    background: var(--primary-soft);
    color: var(--primary-dark);
    font: inherit;
    font-size: 0.72rem;
    font-weight: 700;
    cursor: pointer;
  }

  .take-mobile-nav-open strong {
    font-variant-numeric: tabular-nums;
  }

  .take-mobile-nav-overlay {
    position: fixed;
    inset: 0;
    z-index: 440;
    display: block;
    border: 0;
    background: rgba(15, 29, 43, 0.34);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--t);
  }

  body.exam-nav-sheet-open {
    overflow: hidden;
  }

  body.exam-nav-sheet-open .take-mobile-nav-overlay {
    opacity: 1;
    pointer-events: auto;
  }

  [data-exam-take-form] [data-take-nav] {
    position: fixed;
    inset: auto 10px 10px;
    z-index: 450;
    max-height: min(84vh, 720px);
    overflow-y: auto;
    opacity: 0;
    pointer-events: none;
    transform: translateY(calc(100% + 20px));
    transition: transform var(--t), opacity var(--t);
  }

  [data-exam-take-form] [data-take-nav].is-mobile-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  [data-exam-take-form] [data-take-nav] .take-nav-inner {
    gap: 10px;
    padding: 14px;
    border-radius: 10px;
    box-shadow: var(--shadow-md);
  }

  .take-mobile-nav-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
  }

  .take-mobile-nav-heading > strong {
    font-size: 0.9rem;
  }

  .take-mobile-nav-heading button {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    padding: 0;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: #fff;
    color: var(--text-2);
    cursor: pointer;
  }

  [data-exam-take-form] [data-take-nav] .take-account-card,
  [data-exam-take-form] [data-take-nav] .take-signed-in-name,
  [data-exam-take-form] [data-take-nav] .take-timer-compact {
    display: none;
  }

  [data-exam-take-form] .take-main {
    min-width: 0;
  }

  [data-exam-take-form] .take-question-card {
    scroll-margin-top: 118px;
  }
}

/* Final catalog layout overrides live last so older responsive rules cannot win. */
.home-product-grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.home-latest-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

@media (min-width: 641px) and (max-width: 900px) {
  .home-product-grid,
  .toeic-workspace-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .home-product-grid,
  .home-latest-list,
  .toeic-workspace-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Learning hierarchy refresh: keep the lesson content, reduce navigation noise. */
.learning-back-link {
  margin-bottom: 12px;
}

.learning-back-link a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary-dark);
  font-size: 0.76rem;
  font-weight: 700;
  text-decoration: none;
}

.learning-back-link a:hover {
  text-decoration: underline;
}

.learning-route-heading {
  max-width: 720px;
  margin-top: 0;
}

.learning-route-heading h1,
.learning-lesson-heading h1 {
  margin: 0 0 7px;
  font-size: clamp(1.65rem, 3vw, 2rem);
}

.learning-mode-tabs {
  gap: 4px;
  margin-top: 18px;
}

.learning-mode-tabs a {
  justify-content: center;
  min-height: 46px;
  padding: 9px 12px;
}

.learning-mode-tabs strong {
  font-size: 0.82rem;
}

.learning-entry-panel {
  margin-top: 20px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.learning-entry-panel > h2 {
  margin: 0 0 11px;
  font-size: 0.96rem;
  letter-spacing: 0;
}

.learning-entry-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.learning-entry-options > a,
.learning-continue-card {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) 18px;
  align-items: center;
  gap: 10px;
  min-width: 0;
  padding: 11px 12px;
  border: 1px solid #c8dcdd;
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  text-decoration: none;
}

.learning-entry-options > a:hover,
.learning-continue-card:hover {
  border-color: var(--primary);
  background: #f7fbfa;
}

.learning-entry-options strong,
.learning-entry-options small,
.learning-continue-card strong,
.learning-continue-card small {
  display: block;
}

.learning-entry-options strong,
.learning-continue-card strong {
  font-size: 0.86rem;
  line-height: 1.35;
}

.learning-entry-options small,
.learning-continue-card small {
  margin-top: 2px;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.7rem;
  line-height: 1.35;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.learning-continue-card {
  grid-template-columns: minmax(0, 1fr) 20px;
  border-color: #9acbc6;
  background: #f0f8f7;
}

.learning-continue-card small {
  margin: 0 0 3px;
  color: var(--primary-dark);
  font-weight: 700;
  text-transform: uppercase;
}

.learning-route-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.35fr);
  align-items: start;
  gap: 30px;
  margin-top: 28px;
}

.learning-route-section {
  margin-top: 0;
}

.learning-route-section > header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  min-height: 28px;
  margin-bottom: 9px;
}

.learning-route-section h2,
.learning-route-section p {
  margin: 0;
}

.learning-route-section h2 {
  font-size: 1rem;
  letter-spacing: 0;
}

.learning-route-section > header > span {
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 600;
}

.learning-subject-group + .learning-subject-group {
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.learning-subject-group.is-foundation > header {
  justify-content: flex-start;
  gap: 9px;
}

.learning-subject-group.is-foundation > header > span {
  padding-left: 9px;
  border-left: 1px solid var(--line);
}

.learning-lesson-list {
  grid-template-columns: minmax(0, 1fr);
  gap: 7px;
}

.learning-lesson-row {
  grid-template-columns: 38px minmax(0, 1fr) 18px;
  min-height: 61px;
  padding: 9px 11px;
}

.learning-lesson-row.is-current {
  border-color: #77b9b2;
  background: #f3faf9;
  box-shadow: inset 3px 0 0 var(--primary);
}

.learning-lesson-row.is-ready {
  border-color: var(--line);
}

.learning-lesson-row.is-ready:hover,
.learning-lesson-row.is-current {
  border-color: #77b9b2;
}

.learning-lesson-row.is-complete > i {
  color: #168268;
}

.learning-lesson-code {
  width: 38px;
  height: 32px;
}

.learning-lesson-row h3 {
  font-size: 0.84rem;
}

.learning-lesson-row p {
  margin-top: 2px;
  font-size: 0.68rem;
  font-weight: 650;
}

.learning-lesson-heading {
  display: block;
  margin-top: 0;
  padding-bottom: 18px;
}

.learning-lesson-heading > div:first-child {
  max-width: 820px;
}

.learning-lesson-meta {
  margin: 0 0 6px;
  color: var(--primary-dark);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
}

.learning-save-state {
  gap: 5px;
  margin-top: 10px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 600;
}

.learning-save-state.is-error {
  border: 0;
  background: transparent;
}

.learning-lesson-layout {
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 38px;
  margin-top: 22px;
}

.learning-toc {
  padding: 11px 0;
}

.learning-toc a {
  padding: 7px 8px;
  font-size: 0.74rem;
}

.learning-toc-mobile {
  display: none;
}

.learning-objectives {
  grid-template-columns: 145px minmax(0, 1fr);
  gap: 22px;
  padding: 10px 0 22px;
}

.learning-objectives h2 {
  margin: 2px 0 0;
  font-size: 0.94rem;
}

.learning-block {
  padding: 28px 0;
}

.learning-block > header {
  display: block;
  margin-bottom: 14px;
}

.learning-block h2 {
  font-size: 1.14rem;
}

.learning-block-intro {
  padding-top: 22px;
}

@media (max-width: 820px) {
  .learning-route-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 25px;
  }

  .learning-toc-desktop {
    display: none;
  }

  .learning-lesson-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
    margin-top: 18px;
  }

  .learning-toc-mobile {
    display: block;
    margin-bottom: 18px;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  .learning-toc-mobile summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 11px 0;
    color: var(--text-2);
    font-size: 0.76rem;
    font-weight: 700;
    cursor: pointer;
    list-style: none;
  }

  .learning-toc-mobile summary::-webkit-details-marker {
    display: none;
  }

  .learning-toc-mobile[open] summary i {
    transform: rotate(180deg);
  }

  .learning-toc-mobile nav {
    display: grid;
    gap: 2px;
    padding: 0 0 10px;
  }

  .learning-toc-mobile a {
    padding: 7px 9px;
    border-left: 2px solid transparent;
    color: var(--text-2);
    font-size: 0.75rem;
    font-weight: 600;
    text-decoration: none;
  }

  .learning-toc-mobile a.is-active {
    border-left-color: var(--primary);
    background: #f0f7f6;
    color: var(--primary-dark);
  }
}

@media (max-width: 640px) {
  .learning-back-link {
    margin-bottom: 10px;
  }

  .learning-route-heading h1,
  .learning-lesson-heading h1 {
    font-size: 1.45rem;
  }

  .learning-route-heading > p:last-child,
  .learning-lesson-heading > div > p:last-of-type {
    font-size: 0.9rem;
    line-height: 1.55;
  }

  .learning-mode-tabs a {
    flex-direction: column;
    gap: 3px;
    min-height: 56px;
    padding: 7px 4px;
  }

  .learning-mode-tabs strong {
    font-size: 0.68rem;
    line-height: 1.25;
  }

  .learning-entry-options {
    grid-template-columns: minmax(0, 1fr);
  }

  .learning-route-grid {
    margin-top: 24px;
  }

  .learning-lesson-row {
    min-height: 58px;
  }

  .learning-objectives {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
    padding-top: 5px;
  }

  .learning-block {
    padding: 24px 0;
  }

  .learning-block h2 {
    font-size: 1.05rem;
  }
}

/* Nội dung bài học có công thức dài: giữ cuộn trong công thức, không kéo rộng trang. */
.learning-markup {
  overflow-wrap: anywhere;
}
.learning-markup > mjx-container {
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
}
.learning-content-figure {
  margin: 18px 0;
  max-width: 100%;
}
.learning-content-figure figcaption {
  margin-top: 8px;
  color: var(--text-muted, #64748b);
  font-size: .85rem;
  overflow-wrap: anywhere;
}

/* Learning refinement: scope spacing to lessons, after the compact layout rules. */
.learning-page .learning-block-worked_example,
.learning-page .learning-block-key_point {
  padding: 24px;
}
.learning-page .learning-markup p {
  margin: 0 0 14px;
}
.learning-page .learning-markup > :last-child {
  margin-bottom: 0;
}
.learning-page .learning-markup ul,
.learning-page .learning-markup ol {
  margin: 12px 0 16px;
  padding-left: 24px;
}
.learning-page .learning-markup li + li { margin-top: 7px; }
.learning-display-math {
  min-width: 0;
  margin: 14px 0;
}
.learning-display-math > mjx-container {
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
}
.learning-page .learning-display-math > mjx-container[display="true"] {
  margin: 0;
}
.learning-page .learning-markup table {
  width: 100%;
  min-width: 0;
  border-collapse: collapse;
  font-size: .9em;
}
.learning-page .learning-markup th,
.learning-page .learning-markup td {
  padding: 9px 10px;
  border: 1px solid #d4dfe4;
  text-align: center;
  vertical-align: middle;
}
.learning-page .learning-markup th {
  background: #edf3f5;
  font-weight: 600;
}
.learning-page .learning-objectives {
  display: block;
  padding: 0 0 16px;
}
.learning-objectives summary {
  cursor: pointer;
  color: var(--text-2);
  font-size: .9rem;
  font-weight: 600;
}
.learning-page .learning-objectives ul { margin-top: 12px; }
.learning-practice-invitation,
.learning-finish-note {
  color: var(--text-2);
  font-size: .9rem;
  line-height: 1.6;
}
.learning-practice-invitation { margin: 0 0 14px; }
.learning-finish-note { margin: 12px 0 0; }
.learning-block nav[aria-label="Bài liên quan"] {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}
.learning-finish-actions { align-items: center; }
.learning-finish-actions .button { white-space: normal; }
.learning-completion-state {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: .76rem;
  font-weight: 650;
}
.learning-completion-state.is-complete {
  color: #167363;
}
@media (max-width: 640px) {
  .learning-page .learning-block-worked_example,
  .learning-page .learning-block-key_point {
    margin-left: 0;
    margin-right: 0;
    padding: 20px 14px;
  }
  .learning-page .learning-markup th,
  .learning-page .learning-markup td { padding: 8px 6px; }
  .learning-page .learning-markup table { font-size: .85em; }
}

.learning-extension { margin-top: 16px; }
.learning-extension summary { cursor: pointer; color: var(--primary-dark); font-weight: 600; line-height: 1.5; }
.learning-extension[open] summary { margin-bottom: 14px; }

/* Homepage study hierarchy: product -> subject -> study mode -> content. */
.home-study-accordion {
  display: grid;
  gap: 7px;
}
.home-study-item {
  display: grid;
  gap: 5px;
}
.home-study-trigger {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr) 16px;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 52px;
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: border-color 140ms ease, background 140ms ease;
}
.home-study-trigger:hover,
.home-study-trigger.is-open {
  border-color: #8fc5bd;
  background: #f2f8f6;
}
.home-study-trigger > i:first-child {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  background: var(--primary-soft);
  color: var(--primary-dark);
}
.home-study-trigger > span {
  display: grid;
  gap: 2px;
  min-width: 0;
}
.home-study-trigger strong {
  font-size: .8rem;
}
.home-study-trigger small {
  overflow: hidden;
  color: var(--muted);
  font-size: .68rem;
  line-height: 1.35;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.home-study-chevron {
  display: grid;
  place-items: center;
  width: 16px;
  height: 16px;
  color: var(--muted);
  font-size: .7rem;
  transition: transform 140ms ease;
}
.home-study-trigger.is-open .home-study-chevron {
  color: var(--primary-dark);
  transform: rotate(180deg);
}
.home-study-trigger:focus-visible,
.home-learning-preview:focus-visible {
  outline: 3px solid rgba(15, 118, 110, .24);
  outline-offset: 2px;
}
.home-study-panel {
  display: grid;
  gap: 6px;
  margin-left: 16px;
  padding: 8px 0 8px 12px;
  border-left: 2px solid #9bcac3;
}
.home-study-panel[hidden] {
  display: none;
}
.home-study-panel .home-practice-preview {
  margin: 0;
  padding: 2px 0;
  border: 0;
}
.home-study-panel .home-subject-more {
  margin-top: 2px;
}
.home-learning-preview {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr) 18px;
  align-items: center;
  gap: 10px;
  min-height: 50px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  text-decoration: none;
}
.home-learning-preview:hover {
  border-color: #9bcac3;
  background: #f7fbfa;
}
.home-learning-preview > i:first-child {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  background: var(--primary-soft);
  color: var(--primary-dark);
}
.home-learning-preview > span {
  display: grid;
  gap: 2px;
  min-width: 0;
}
.home-learning-preview strong {
  font-size: .78rem;
}
.home-learning-preview small {
  color: var(--muted);
  font-size: .68rem;
}
.home-learning-preview > i:last-child {
  color: var(--primary-dark);
}
@media (min-width: 761px) {
  .home-product-grid.has-open-product {
    grid-template-columns: minmax(0, 1fr);
  }
}
@media (max-width: 640px) {
  .home-study-trigger small {
    white-space: normal;
  }
  .home-study-panel {
    margin-left: 10px;
    padding-left: 9px;
  }
}

/* Stable THPT explorer: selections update a reserved detail area instead of
   inserting nested panels between unrelated choices. */
.home-thpt-explorer {
  display: grid;
  grid-template-columns: minmax(320px, .72fr) minmax(440px, 1.28fr);
  min-height: 388px;
  overflow-anchor: none;
}
.home-subject-menu {
  min-width: 0;
  padding: 4px 16px 4px 4px;
  border-right: 1px solid var(--line);
}
.home-thpt-explorer .home-subject-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
}
.home-thpt-explorer .home-subject-link {
  min-height: 48px;
  padding: 9px 11px;
}
.home-thpt-explorer .home-subject-link.is-open {
  border-color: var(--primary-dark);
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 12px rgba(15, 92, 85, .16);
}
.home-thpt-explorer .home-subject-link.is-open .home-subject-chevron {
  color: #fff;
  transform: none;
}
.home-thpt-explorer .home-subject-chevron {
  justify-self: end;
  transform: none;
}
.home-subject-detail {
  position: relative;
  min-width: 0;
  min-height: 330px;
  padding: 4px 4px 4px 18px;
}
.home-subject-placeholder,
.home-study-placeholder {
  display: grid;
  place-items: center;
  align-content: center;
  gap: 8px;
  min-height: 100%;
  color: var(--muted);
  font-size: .76rem;
  font-weight: 650;
  text-align: center;
}
.home-subject-placeholder > i,
.home-study-placeholder > i {
  color: #7baaa4;
  font-size: 1.25rem;
}
.home-subject-placeholder[hidden] {
  display: none;
}
.home-thpt-explorer .home-subject-panel {
  display: block;
  min-height: 100%;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
}
.home-thpt-explorer .home-subject-panel[hidden] {
  display: none;
}
.home-subject-mobile-header {
  display: none;
}
.home-thpt-explorer .home-study-accordion {
  display: grid;
  gap: 8px;
  min-height: 322px;
}
.home-thpt-explorer .home-study-accordion.has-three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.home-thpt-explorer .home-study-accordion.has-two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.home-thpt-explorer .home-study-accordion.has-one {
  grid-template-columns: minmax(0, 1fr);
}
.home-thpt-explorer .home-study-item {
  display: contents;
}
.home-thpt-explorer .home-study-trigger {
  grid-row: 1;
  align-self: start;
}
.home-thpt-explorer .home-study-trigger.is-open {
  border-color: var(--primary-dark);
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 12px rgba(15, 92, 85, .14);
}
.home-thpt-explorer .home-study-trigger.is-open > i:first-child {
  background: rgba(255, 255, 255, .16);
  color: #fff;
}
.home-thpt-explorer .home-study-trigger.is-open small,
.home-thpt-explorer .home-study-trigger.is-open .home-study-chevron {
  color: #e3f3f0;
}
.home-thpt-explorer .home-study-panel,
.home-thpt-explorer .home-study-placeholder {
  grid-column: 1 / -1;
  grid-row: 2;
  align-self: stretch;
  min-height: 250px;
  margin: 0;
  padding: 14px 4px 4px;
  border: 0;
  border-top: 1px solid var(--line);
}
.home-thpt-explorer .home-study-panel {
  align-content: start;
}
.home-thpt-explorer .home-study-panel[hidden],
.home-thpt-explorer .home-study-placeholder[hidden] {
  display: none;
}
.home-thpt-explorer .home-study-panel .home-subject-exam {
  min-height: 45px;
}

.home-study-trigger:disabled {
  border-color: #e1e8e7;
  background: #f7f9f9;
  color: #879493;
  box-shadow: none;
  cursor: default;
  opacity: .72;
}
.home-study-trigger:disabled > i:first-child {
  background: #edf1f1;
  color: #8d9998;
}
.home-study-trigger:disabled small,
.home-study-trigger:disabled .home-study-chevron {
  color: #98a3a2;
}

/* Lớp -> môn -> cách học dùng ba vùng cố định trên desktop. Chỉ metadata
   xuất hiện ở đây; nội dung chi tiết được tải khi học viên mở một cách học. */
.home-school-explorer {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  min-height: 304px;
  overflow-anchor: none;
}
.home-school-grade-menu {
  display: grid;
  align-content: start;
  gap: 7px;
  padding: 4px 14px 4px 4px;
  border-right: 1px solid var(--line);
}
.home-school-grade {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) 12px;
  align-items: center;
  gap: 8px;
  min-height: 56px;
  padding: 8px 9px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  font: inherit;
  text-align: left;
  cursor: pointer;
}
.home-school-grade > i:first-child {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 5px;
  background: var(--primary-soft);
  color: var(--primary-dark);
}
.home-school-grade > span {
  display: grid;
  gap: 2px;
  min-width: 0;
}
.home-school-grade strong {
  font-size: .76rem;
}
.home-school-grade small {
  color: var(--muted);
  font-size: .62rem;
  line-height: 1.3;
}
.home-school-grade > i:last-child {
  color: var(--muted);
  font-size: .65rem;
}
.home-school-grade:hover,
.home-school-grade.is-open {
  border-color: var(--primary-dark);
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 12px rgba(15, 92, 85, .14);
}
.home-school-grade.is-open > i:first-child {
  background: rgba(255, 255, 255, .16);
  color: #fff;
}
.home-school-grade.is-open small,
.home-school-grade.is-open > i:last-child {
  color: #e3f3f0;
}
.home-school-grade-detail {
  min-width: 0;
  padding: 4px 4px 4px 16px;
}
.home-school-grade-panel {
  min-height: 296px;
}
.home-school-grade-panel[hidden] {
  display: none;
}
.home-school-subject-explorer {
  display: grid;
  grid-template-columns: minmax(210px, .65fr) minmax(390px, 1.35fr);
  min-height: 296px;
}
.home-school-subject-explorer .home-subject-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
}
.home-school-subject-explorer .home-subject-link {
  min-height: 44px;
  padding: 8px 10px;
}
.home-school-subject-explorer .home-subject-link.is-open {
  border-color: var(--primary-dark);
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 12px rgba(15, 92, 85, .14);
}
.home-school-subject-explorer .home-subject-link.is-open .home-subject-chevron {
  color: #fff;
}
.home-school-subject-explorer .home-subject-detail {
  min-height: 288px;
}
.home-school-subject-explorer .home-subject-panel {
  display: block;
  min-height: 100%;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
}
.home-school-subject-explorer .home-subject-panel[hidden] {
  display: none;
}
.home-school-subject-explorer .home-study-accordion {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  min-height: 280px;
}
.home-school-subject-explorer .home-study-item {
  display: contents;
}
.home-school-subject-explorer .home-study-trigger {
  grid-row: 1;
  align-self: start;
}
.home-school-subject-explorer .home-study-trigger.is-open {
  border-color: var(--primary-dark);
  background: var(--primary);
  color: #fff;
}
.home-school-subject-explorer .home-study-trigger.is-open > i:first-child {
  background: rgba(255, 255, 255, .16);
  color: #fff;
}
.home-school-subject-explorer .home-study-trigger.is-open small,
.home-school-subject-explorer .home-study-trigger.is-open .home-study-chevron {
  color: #e3f3f0;
}
.home-school-subject-explorer .home-study-panel,
.home-school-subject-explorer .home-study-placeholder {
  grid-column: 1 / -1;
  grid-row: 2;
  min-height: 202px;
  margin: 0;
  padding: 11px 4px 4px;
  border: 0;
  border-top: 1px solid var(--line);
}
.home-school-subject-explorer .home-study-panel[hidden],
.home-school-subject-explorer .home-study-placeholder[hidden] {
  display: none;
}
.home-school-empty {
  display: grid;
  place-items: center;
  align-content: center;
  gap: 7px;
  min-height: 288px;
  color: var(--muted);
  text-align: center;
}
.home-school-empty i {
  color: #7baaa4;
  font-size: 1.25rem;
}
.home-school-empty strong {
  color: var(--text-2);
  font-size: .82rem;
}
.home-school-empty span {
  font-size: .72rem;
}

@media (max-width: 1000px) {
  .home-thpt-explorer {
    display: block;
    min-height: 388px;
  }
  .home-subject-menu {
    min-height: 380px;
    padding: 4px;
    border-right: 0;
  }
  .home-thpt-explorer.has-subject .home-subject-menu {
    display: none;
  }
  .home-thpt-explorer:not(.has-subject) .home-subject-detail {
    display: none;
  }
  .home-subject-detail {
    min-height: 330px;
    padding: 0 4px 4px;
  }
  .home-subject-mobile-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    min-height: 36px;
    margin-bottom: 8px;
  }
  .home-subject-mobile-header > strong {
    font-size: .82rem;
  }
  .home-subject-back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 0;
    border: 0;
    background: transparent;
    color: var(--primary-dark);
    font: inherit;
    font-size: .72rem;
    font-weight: 700;
    cursor: pointer;
  }
  .home-thpt-explorer .home-study-accordion {
    min-height: 278px;
  }
  .home-thpt-explorer .home-study-trigger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    min-height: 64px;
    padding: 7px 4px;
    text-align: center;
  }
  .home-thpt-explorer .home-study-trigger > span {
    display: block;
  }
  .home-thpt-explorer .home-study-trigger small,
  .home-thpt-explorer .home-study-chevron {
    display: none;
  }
  .home-thpt-explorer .home-study-trigger strong {
    font-size: .69rem;
    line-height: 1.25;
  }
  .home-thpt-explorer .home-study-trigger > i:first-child {
    width: 27px;
    height: 27px;
  }
  .home-thpt-explorer .home-study-panel,
  .home-thpt-explorer .home-study-placeholder {
    min-height: 202px;
    padding-top: 11px;
  }
  .home-school-explorer {
    display: block;
    min-height: 388px;
  }
  .home-school-grade-menu {
    min-height: 380px;
    padding: 4px;
    border-right: 0;
  }
  .home-school-explorer.has-grade .home-school-grade-menu {
    display: none;
  }
  .home-school-explorer:not(.has-grade) .home-school-grade-detail {
    display: none;
  }
  .home-school-grade-detail {
    padding: 0 4px 4px;
  }
  .home-school-subject-explorer {
    display: block;
    min-height: 330px;
  }
  .home-school-subject-explorer .home-subject-menu {
    min-height: 320px;
  }
  .home-school-subject-explorer.has-subject .home-subject-menu {
    display: none;
  }
  .home-school-grade-panel.has-selected-subject > .home-subject-mobile-header {
    display: none;
  }
  .home-school-subject-explorer:not(.has-subject) .home-subject-detail {
    display: none;
  }
  .home-school-subject-explorer .home-subject-detail {
    min-height: 286px;
    padding: 0 4px 4px;
  }
  .home-school-subject-explorer .home-study-trigger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    min-height: 64px;
    padding: 7px 4px;
    text-align: center;
  }
  .home-school-subject-explorer .home-study-trigger > span {
    display: block;
  }
  .home-school-subject-explorer .home-study-trigger small,
  .home-school-subject-explorer .home-study-chevron {
    display: none;
  }
  .home-school-subject-explorer .home-study-trigger strong {
    font-size: .69rem;
    line-height: 1.25;
  }
  .home-school-subject-explorer .home-study-trigger > i:first-child {
    width: 27px;
    height: 27px;
  }
}

/* Desktop product chooser: keep the product families in one stable rail and
   show the selected workspace beside it. Mobile keeps the inline accordion. */
@media (min-width: 1200px) {
  .home-product-grid.has-open-product {
    position: relative;
    display: grid;
    grid-template-columns: 300px minmax(0, 1fr);
    grid-template-rows: repeat(3, 76px);
    align-content: start;
    gap: 8px 16px;
    min-height: 330px;
  }

  .home-product-grid.has-open-product > .home-product-item {
    display: contents;
  }

  .home-product-grid.has-open-product > .home-product-item > .home-product-card {
    grid-column: 1;
    min-height: 76px;
    padding: 11px 13px;
  }

  .home-product-grid.has-open-product > .home-product-item:nth-child(1) > .home-product-card {
    grid-row: 1;
  }

  .home-product-grid.has-open-product > .home-product-item:nth-child(2) > .home-product-card {
    grid-row: 2;
  }

  .home-product-grid.has-open-product > .home-product-item:nth-child(3) > .home-product-card {
    grid-row: 3;
  }

  .home-product-grid.has-open-product > .home-product-item > .home-product-panel {
    position: absolute;
    top: 0;
    right: 0;
    left: 316px;
    margin: 0;
  }

  .home-product-grid.has-open-product .home-thpt-explorer {
    min-height: 304px;
  }

  .home-product-grid.has-open-product .home-subject-detail {
    min-height: 296px;
  }

  .home-product-grid.has-open-product .home-study-accordion {
    grid-template-rows: auto 240px;
    min-height: 0;
  }

  .home-product-grid.has-open-product .home-study-panel,
  .home-product-grid.has-open-product .home-study-placeholder {
    height: 240px;
  }

  .home-product-grid.has-open-product .home-school-actions {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }
}

.home-school-actions a > span,
.home-toeic-actions > a > span,
.home-toeic-actions > button > span {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.home-school-actions a strong,
.home-toeic-actions strong {
  font-size: .78rem;
  line-height: 1.3;
}

.home-school-actions a small,
.home-toeic-actions small {
  overflow: hidden;
  color: var(--muted);
  font-size: .68rem;
  font-weight: 500;
  line-height: 1.3;
  text-overflow: ellipsis;
  white-space: nowrap;
}

@media (max-width: 640px) {
  .home-school-actions a small,
  .home-toeic-actions small {
    display: none;
  }
}

/* Subject workspace: all study modes are peers and switch in place. */
.practice-browser-tabs {
  align-items: stretch;
}

.practice-browser[data-learning-catalog-url] .practice-browser-tabs {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.practice-browser-tabs > button {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  min-height: 66px;
  padding: 10px 12px;
  font: inherit;
  line-height: 1.3;
}

.practice-browser-tabs > button > i {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 6px;
  background: #e2f1ef;
  color: var(--primary-dark);
  font-size: 1rem;
}

.practice-browser-tabs > button > span {
  min-width: 0;
}

.practice-browser-tabs > button strong {
  font-size: .84rem;
  line-height: 1.3;
}

.practice-browser-tabs > button small {
  font-size: .72rem;
  line-height: 1.35;
}

.practice-browser-tabs > button.is-active {
  border-color: var(--primary-dark);
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 12px rgba(15, 92, 85, .14);
}

.practice-browser-tabs > button.is-active > i {
  background: rgba(255, 255, 255, .16);
  color: #fff;
}

.practice-browser-tabs > button.is-active small {
  color: #e3f3f0;
}

.practice-learning-panel {
  align-content: start;
  gap: 0;
}

.practice-learning-loading {
  margin: 0;
  padding: 22px 0;
  color: var(--muted);
  font-size: .82rem;
}

.practice-learning-heading {
  align-items: start;
}

.practice-learning-heading > div > p:last-child {
  max-width: 720px;
  margin: 5px 0 0;
  color: var(--text-2);
  font-size: .84rem;
  line-height: 1.5;
}

.practice-learning-panel .learning-entry-panel {
  margin-top: 16px;
}

.practice-learning-panel .learning-route-grid {
  margin-top: 18px;
}

@media (max-width: 640px) {
  .practice-browser-tabs > button {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    min-height: 72px;
    padding: 7px 4px;
    text-align: center;
  }

  .practice-browser-tabs > button > i {
    width: 28px;
    height: 28px;
    font-size: .9rem;
  }

  .practice-browser-tabs > button strong {
    font-size: .7rem;
    line-height: 1.25;
  }

  .practice-browser-tabs > button small {
    display: none;
  }

  .practice-learning-heading > div > p:last-child {
    font-size: .8rem;
  }
}

/* Keep MathJax's screen-reader MathML available without widening a lesson.
   MathJax sets width:auto !important; its clipped box still affects scrolling. */
.learning-page mjx-assistive-mml {
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
}

/* Homepage previews: reserve one compact stage, let each card fit its content. */
.home-thpt-explorer .home-study-accordion {
  grid-template-rows: auto 270px;
  align-content: start;
}

.home-thpt-explorer .home-study-panel,
.home-thpt-explorer .home-study-placeholder {
  box-sizing: border-box;
  height: 270px;
  min-height: 0;
}

.home-thpt-explorer .home-study-panel {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.home-thpt-explorer .home-study-panel[hidden],
.home-thpt-explorer .home-study-placeholder[hidden] {
  display: none;
}

.home-thpt-explorer .home-preview-list,
.home-thpt-explorer .home-practice-preview-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-auto-rows: minmax(58px, auto);
  align-content: start;
  gap: 6px;
}

.home-thpt-explorer .home-preview-list .home-subject-exam,
.home-thpt-explorer .home-practice-preview-list a {
  box-sizing: border-box;
  min-width: 0;
  min-height: 58px;
  height: auto;
  margin: 0;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface, #fff);
  text-align: left;
}

.home-thpt-explorer .home-exam-preview-title,
.home-thpt-explorer .home-practice-preview-list strong {
  display: -webkit-box;
  overflow: hidden;
  color: var(--text);
  font-size: .76rem;
  font-weight: 650;
  line-height: 1.35;
  white-space: normal;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.home-thpt-explorer .home-practice-preview-list small {
  display: block;
  overflow: hidden;
  margin-top: 2px;
  color: var(--muted);
  font-size: .66rem;
  line-height: 1.3;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.home-thpt-explorer .home-study-panel .home-subject-more {
  flex-shrink: 0;
  margin-top: auto;
}

.home-thpt-explorer .home-practice-preview > small {
  display: none;
}

@media (max-width: 1000px) {
  .home-thpt-explorer .home-study-accordion {
    grid-template-rows: auto 286px;
  }

  .home-thpt-explorer .home-study-panel,
  .home-thpt-explorer .home-study-placeholder {
    height: 286px;
  }

  .home-thpt-explorer .home-preview-list,
  .home-thpt-explorer .home-practice-preview-list {
    grid-template-columns: minmax(0, 1fr);
    grid-auto-rows: minmax(52px, auto);
  }

  .home-thpt-explorer .home-preview-list .home-subject-exam,
  .home-thpt-explorer .home-practice-preview-list a {
    min-height: 52px;
    padding-block: 7px;
  }

  .home-thpt-explorer .home-preview-list > :nth-child(n+5),
  .home-thpt-explorer .home-practice-preview-list > :nth-child(n+5) {
    display: none;
  }
}


/* Lesson code is literal text: preserve indentation and contain long lines. */
.learning-code {
  max-width: 100%;
  overflow-x: auto;
  white-space: pre;
  padding: 14px;
  border: 1px solid #d4dfe4;
  border-radius: 6px;
  background: #f4f7f9;
  font-size: .875rem;
  line-height: 1.65;
}
.learning-code code { white-space: inherit; }

.practice-topic-list.has-topic-groups { grid-template-columns: 1fr; }
.practice-topic-group { overflow: hidden; border: 1px solid var(--line); border-radius: 8px; background: #fff; min-width: 0; }
.practice-topic-group > summary { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 12px; min-height: 52px; padding: 11px 14px; cursor: pointer; color: var(--text); list-style: none; }
.practice-topic-group > summary::-webkit-details-marker { display: none; }
.practice-topic-group > summary strong { display: inline; font-size: .9rem; }
.practice-topic-group > summary > i { color: var(--primary-dark); font-size: .78rem; transition: transform var(--t); }
.practice-topic-group[open] > summary > i { transform: rotate(180deg); }
.practice-topic-group[open] > summary { border-bottom: 1px solid var(--line); background: var(--primary-soft); }
.practice-group-children { display: grid; gap: 7px; padding: 10px; }
.practice-topic-group > input { margin: 10px; padding: 9px; width: calc(100% - 20px); border: 1px solid var(--line); border-radius: 6px; }
.practice-topic-group > p { margin: 10px; }
.practice-group-children button[hidden] { display: none; }
.home-practice-preview-list > span { padding: 10px; color: var(--muted); }

.practice-topic-config > [data-practice-submit] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}


.practice-topic-layout:has(.has-topic-groups):has(.practice-topic-config[hidden]) { grid-template-columns: 1fr; }

/* Self-review forms are grid children too: allow long maths to stay inside the viewport. */
.proof-review-form { display: grid; gap: 16px; min-width: 0; max-width: 100%; }
.proof-review-form .result-question-card { min-width: 0; max-width: 100%; }
.proof-review-form .result-explanation { max-height: none; overflow: visible; scrollbar-gutter: auto; }
.proof-result-box { display: grid; gap: 10px; min-width: 0; margin-top: 14px; }
.proof-result-box select { width: 100%; min-width: 0; max-width: 100%; padding: 10px; font: inherit; border: 1px solid var(--line); border-radius: 6px; background: white; }
.proof-result-box .result-answer-badge { justify-self: start; }
.proof-score-note { margin: 0; color: var(--text-2); font-size: .875rem; line-height: 1.6; }
.result-question-card { scroll-margin-top: 76px; }
.proof-review-form .explanation-markup mjx-container[display="true"] { max-width: 100%; overflow-x: auto; overflow-y: hidden; }

.proof-review-options { border: 0; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px; min-width: 0; }
.proof-review-options legend { margin-bottom: 10px; font-weight: 600; }
.proof-review-options label { display: flex; align-items: center; gap: 7px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; cursor: pointer; background: white; }
.proof-review-options label:has(input:checked) { border-color: var(--primary); background: var(--primary-soft); }
.proof-review-options input { margin: 0; accent-color: var(--primary); }
[data-proof-save-status]:empty { display: none; }
[data-proof-save-status] { color: var(--text-2); }

.result-repeat-mobile, .take-mobile-submit { display: none; }
@media (max-width: 900px) {
  .result-bottom-actions { margin-top: 20px; padding-bottom: 28px; }
  .result-repeat-desktop { display: none !important; }
  .result-repeat-mobile { display: block; width: 100%; margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--line); }
  .result-repeat-mobile summary { padding: 12px; cursor: pointer; color: var(--text-2); }
  .result-repeat-mobile a { margin: 12px; }
  .take-mobile-submit { display: block; margin: 24px 0; }
  .take-mobile-submit button { width: 100%; min-height: 46px; }
}

.sidebar-current-context {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 42px;
  margin: 8px 8px 0;
  padding: 9px 14px;
  border: 1px solid #b9ddd8;
  border-radius: 6px;
  background: #eef8f6;
  color: var(--primary-dark);
  font-size: 0.84rem;
  font-weight: 700;
}

.sidebar-current-context i {
  font-size: 1rem;
}

.topic-result-change {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.topic-result-next-form .button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.topic-result-bottom-actions {
  display: none;
}

.result-question-card .take-q-header {
  border-bottom: 1px solid #dde5e6;
  background: #f8faf9;
}

.result-question-card + .result-question-card {
  margin-top: 8px;
}

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.take-text-answer input {
  min-height: 48px;
  padding: 11px 13px;
  border-width: 1.5px;
  border-color: #b8c9cb;
  background: #fbfdfc;
}

.take-text-answer input::placeholder {
  color: #718085;
  font-weight: 500;
}

.take-text-answer input:focus {
  border-color: var(--primary);
  outline: 3px solid rgba(15, 118, 110, 0.12);
  outline-offset: 1px;
}

@media (max-width: 760px) {
  .result-nav .topic-result-followup {
    display: none;
  }

  .topic-result-bottom-actions {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
    width: 100%;
  }

  .topic-result-bottom-actions form,
  .topic-result-bottom-actions .button {
    width: 100%;
  }

  .topic-result-bottom-actions .topic-result-retry-form {
    display: flex;
    justify-content: center;
  }

  .result-question-card + .result-question-card {
    margin-top: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}