/* =============================================
   igaAI — editorial examination aesthetic
   ============================================= */

:root {
  /* Palette */
  --bg:           #FAF7F2;           /* warm cream */
  --surface:     #FFFFFF;
  --surface-alt: #F4F0E8;            /* paper tone */
  --ink:         #1A1A1A;
  --ink-muted:   #666664;
  --rule:        #E5DFD3;            /* warm taupe rule */

  --primary:     #0F4C3A;            /* deep emerald */
  --primary-deep:#0A3528;
  --primary-soft:#E8EFEB;

  --accent:      #D4A437;            /* mustard amber */
  --accent-soft: #F7EFD8;

  --correct:     #0F4C3A;
  --correct-bg:  #E8EFEB;
  --incorrect:   #B5443B;            /* terracotta */
  --incorrect-bg:#F8E8E5;

  /* Typography */
  --font-display: "Fraunces", "Georgia", serif;
  --font-body:    "Geist", system-ui, -apple-system, sans-serif;

  /* Layout */
  --container: 720px;
  --container-wide: 960px;
  --radius: 6px;
  --radius-lg: 12px;

  --shadow-sm: 0 1px 2px rgba(20, 30, 25, 0.04), 0 1px 1px rgba(20, 30, 25, 0.03);
  --shadow-md: 0 6px 24px -8px rgba(20, 30, 25, 0.12), 0 2px 6px rgba(20, 30, 25, 0.04);
}

/* =============================================
   Reset & base
   ============================================= */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
[hidden] { display: none !important; }
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background:
    radial-gradient(ellipse at 80% -10%, rgba(212, 164, 55, 0.06), transparent 50%),
    radial-gradient(ellipse at -10% 90%, rgba(15, 76, 58, 0.04), transparent 50%),
    var(--bg);
  background-attachment: fixed;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--primary-deep); }

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 500; letter-spacing: -0.01em; line-height: 1.15; margin: 0; }
h1 { font-size: clamp(2rem, 5vw + 1rem, 3.5rem); }
h2 { font-size: clamp(1.4rem, 2vw + 1rem, 2rem); }
h3 { font-size: 1.25rem; }

p { margin: 0 0 1em; }

input, button, textarea { font: inherit; color: inherit; }

/* =============================================
   Layout shell
   ============================================= */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

@media (min-width: 720px) {
  .container { padding: 3rem 2rem 5rem; }
}

.site-header {
  border-bottom: 1px solid var(--rule);
  padding: 1rem 1.25rem;
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
  flex-wrap: wrap;
  background: rgba(250, 247, 242, 0.85);
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  position: sticky;
  top: 0;
  z-index: 50;
}
.brand {
  text-decoration: none;
  color: var(--ink);
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.brand-mark { color: var(--ink); }
.brand-mark--accent {
  color: var(--primary);
  font-style: italic;
  font-weight: 700;
}
.brand-by {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-left: 0.4rem;
}
.brand-tagline {
  font-size: 0.8rem;
  color: var(--ink-muted);
  letter-spacing: 0.02em;
  font-style: italic;
}
@media (max-width: 600px) { .brand-tagline { display: none; } }

/* =============================================
   Global branded loader
   ============================================= */
.global-loader {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background:
    radial-gradient(ellipse at 50% 30%, rgba(212, 164, 55, 0.09), transparent 45%),
    rgba(250, 247, 242, 0.96);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  transition: opacity 180ms ease;
}

.global-loader.is-visible {
  opacity: 1;
}

.global-loader-card {
  display: grid;
  justify-items: center;
  gap: 1.15rem;
  color: var(--ink);
  text-align: center;
}

.global-loader-brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 9vw, 4.5rem);
  font-weight: 700;
  line-height: 1;
}

.global-loader-brand .brand-by {
  font-size: clamp(0.65rem, 2vw, 0.85rem);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.global-loader-ring {
  width: 3.25rem;
  height: 3.25rem;
  border-radius: 50%;
  border: 3px solid var(--rule);
  border-top-color: var(--primary);
  animation: prepare-spin 850ms linear infinite;
}

.global-loader p {
  margin: 0;
  color: var(--ink-muted);
  font-weight: 700;
}

.auth-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
}

.auth-nav a {
  text-decoration: none;
  color: var(--primary);
  font-weight: 600;
}

.auth-nav-primary {
  border: 1px solid var(--primary);
  border-radius: 999px;
  padding: 0.4rem 0.75rem;
}

.site-footer {
  max-width: var(--container-wide);
  margin: 4rem auto 0;
  padding: 2rem 1.25rem 3rem;
  border-top: 1px solid var(--rule);
  font-size: 0.85rem;
  color: var(--ink-muted);
  display: grid;
  gap: 0.5rem;
}
.site-footer a { color: var(--primary); }
.footer-meta { font-style: italic; }

/* =============================================
   Hero (home)
   ============================================= */
.practice-dashboard {
  display: grid;
  gap: 1rem;
  margin: 1rem 0 2.5rem;
}

.dashboard-kicker,
.continue-label {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  margin: 0;
}

.dashboard-title {
  font-size: clamp(2rem, 4vw + 1rem, 3rem);
  max-width: 11em;
}

.student-tabs {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  width: fit-content;
  padding: 0.25rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--surface);
}

.student-tabs a {
  text-decoration: none;
  border-radius: 999px;
  padding: 0.45rem 0.85rem;
  color: var(--ink-muted);
  font-size: 0.85rem;
  font-weight: 700;
}

.student-tabs a.is-active {
  background: var(--primary);
  color: #fff;
}

.continue-card {
  display: grid;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
}

.continue-card h2 {
  margin: 0.35rem 0;
  font-size: 1.5rem;
}

.continue-card p {
  margin: 0;
  color: var(--ink-muted);
}

.progress-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 0.75rem;
  padding: 1rem 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.dashboard-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.subject-progress {
  display: grid;
  gap: 0.9rem;
  margin-top: 0.25rem;
}

.subject-progress-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: baseline;
  flex-wrap: wrap;
}

.subject-progress-head a {
  font-size: 0.9rem;
}

.subject-progress-grid {
  display: grid;
  gap: 1rem;
}

.subject-progress-card {
  display: grid;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-lg);
}

.subject-progress-main h2 {
  margin: 0.35rem 0;
  font-size: 1.35rem;
}

.subject-progress-main p {
  margin: 0;
  color: var(--ink-muted);
}

.subject-progress-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  padding: 0.85rem 0;
  border-top: 1px dashed var(--rule);
  border-bottom: 1px dashed var(--rule);
}

@media (min-width: 760px) {
  .subject-progress-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.auth-panel {
  max-width: 520px;
  margin: 1rem auto 3rem;
  display: grid;
  gap: 1rem;
}

.auth-form {
  display: grid;
  gap: 0.75rem;
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
}

.auth-form label {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  font-weight: 600;
}

.auth-form input,
.auth-form select {
  width: 100%;
  padding: 0.8rem 0.9rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--bg);
}

.auth-form input:focus,
.auth-form select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

.password-field {
  position: relative;
}

.password-field input {
  padding-right: 4.8rem;
}

.password-toggle {
  position: absolute;
  right: 0.45rem;
  top: 50%;
  transform: translateY(-50%);
  border: 0;
  border-radius: 999px;
  padding: 0.32rem 0.62rem;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 800;
  cursor: pointer;
}

.password-toggle:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.auth-form ul.errorlist {
  margin: -0.25rem 0 0;
  padding-left: 1.2rem;
  color: var(--incorrect);
  font-size: 0.85rem;
}

.auth-switch {
  text-align: center;
  color: var(--ink-muted);
}

.auth-intro {
  color: var(--ink-muted);
  margin: -0.25rem 0 0;
}

.profile-completion {
  display: grid;
  gap: 0.35rem;
  padding: 1rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
}

.profile-completion strong {
  font-family: var(--font-display);
  font-size: 1.8rem;
  color: var(--primary);
}

.profile-meter {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--rule);
}

.profile-meter span {
  display: block;
  height: 100%;
  background: var(--primary);
  border-radius: inherit;
}

.profile-skip-form {
  display: flex;
  justify-content: center;
}

.progress-page {
  display: grid;
  gap: 1.5rem;
}

.progress-hero {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.progress-hero h1 {
  font-size: clamp(2.25rem, 5vw + 1rem, 4rem);
}

.progress-hero p {
  max-width: 42rem;
  color: var(--ink-muted);
  margin: 0;
}

.progress-hero form {
  margin-top: 0.5rem;
}

.progress-hero .student-tabs {
  margin: 0.25rem 0 0.5rem;
}

.progress-summary {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.progress-summary article,
.progress-panel,
.progress-empty {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
}

.progress-summary article {
  padding: 1rem;
  display: grid;
  gap: 0.25rem;
}

.progress-summary strong {
  font-family: var(--font-display);
  font-size: 2rem;
  line-height: 1;
  color: var(--primary);
  font-weight: 500;
}

.progress-section {
  display: grid;
  gap: 0.9rem;
}

.progress-grid-two {
  display: grid;
  gap: 1rem;
}

.progress-panel,
.progress-empty {
  padding: 1.1rem 1.25rem;
}

.progress-empty {
  display: grid;
  gap: 0.75rem;
  justify-items: start;
}

.progress-empty h2,
.progress-empty p {
  margin: 0;
}

.progress-empty p,
.empty-state {
  color: var(--ink-muted);
}

.mastery-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.mastery-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px dashed var(--rule);
}

.mastery-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.mastery-list strong {
  display: block;
  font-family: var(--font-display);
  font-weight: 500;
}

.mastery-list small {
  display: block;
  color: var(--ink-muted);
  font-size: 0.8rem;
}

.mastery-list span {
  color: var(--primary);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.subject-mastery-groups {
  display: grid;
  gap: 1rem;
}

.subject-mastery-group {
  display: grid;
  gap: 0.55rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--rule);
}

.subject-mastery-group:first-child {
  padding-top: 0;
  border-top: 0;
}

.subject-mastery-group h2 {
  font-size: 1.05rem;
}

.session-timeline {
  display: grid;
  gap: 0.7rem;
}

.session-timeline-row {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(110px, 1fr) auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.9rem 1rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
}

.session-timeline-meta {
  display: grid;
  gap: 0.1rem;
  min-width: 0;
}

.session-timeline-meta strong {
  font-family: var(--font-display);
  font-weight: 500;
}

.session-timeline-meta small {
  color: var(--ink-muted);
}

.progress-session-bar {
  height: 8px;
  border-radius: 999px;
  overflow: hidden;
  background: var(--rule);
}

.progress-session-bar span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--primary);
}

.session-score {
  color: var(--primary);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

@media (min-width: 760px) {
  .progress-summary {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .progress-grid-two {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 620px) {
  .session-timeline-row {
    grid-template-columns: 1fr auto;
  }

  .progress-session-bar {
    grid-column: 1 / -1;
    grid-row: 2;
  }
}

.analytics-page {
  display: grid;
  gap: 1.5rem;
}

.analytics-head {
  display: grid;
  gap: 0.55rem;
}

.staff-tabs {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.35rem;
}

.staff-tabs a {
  text-decoration: none;
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 0.45rem 0.8rem;
  background: var(--surface);
  color: var(--primary);
  font-size: 0.9rem;
  font-weight: 700;
}

.staff-tabs a.is-active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.analytics-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

.analytics-card {
  padding: 1rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  background: var(--surface);
  display: grid;
  gap: 0.25rem;
}

.analytics-card strong {
  font-family: var(--font-display);
  color: var(--primary);
  font-size: 2rem;
  line-height: 1;
}

.analytics-card small {
  color: var(--ink-muted);
}

.analytics-section {
  display: grid;
  gap: 0.75rem;
}

.analytics-section h2 {
  font-size: 1.25rem;
}

.analytics-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.analytics-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 560px;
}

.analytics-table th,
.analytics-table td {
  padding: 0.75rem 0.9rem;
  border-bottom: 1px solid var(--rule);
  text-align: left;
  vertical-align: top;
}

.analytics-table th {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  background: var(--surface-alt);
}

.analytics-table tr:last-child td {
  border-bottom: 0;
}

.billing-form,
.billing-panel,
.billing-plan-list {
  display: grid;
  gap: 1rem;
}

.billing-panel {
  padding: 1.2rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
}

.toggle-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.75rem;
  align-items: start;
}

.toggle-row input {
  margin-top: 0.25rem;
}

.toggle-row strong {
  display: block;
}

.toggle-row small {
  display: block;
  color: var(--ink-muted);
}

.billing-warning {
  margin: 0;
  padding: 0.8rem 0.9rem;
  color: #8A6514;
  background: var(--accent-soft);
  border-radius: var(--radius);
}

.billing-help {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.9rem;
}

.billing-panel select {
  width: 100%;
  max-width: 360px;
  padding: 0.75rem 0.8rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--surface);
}

.billing-plan-row {
  display: grid;
  gap: 0.75rem;
  padding: 1rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--bg);
}

.billing-plan-row label {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-muted);
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.billing-plan-row input[type="text"],
.billing-plan-row input[type="number"] {
  width: 100%;
  padding: 0.75rem 0.8rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--surface);
}

.billing-plan-row .mini-check {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  text-transform: none;
  letter-spacing: 0;
  color: var(--ink);
  font-size: 0.9rem;
}

@media (min-width: 820px) {
  .billing-plan-row {
    grid-template-columns: 1.1fr 0.7fr 0.7fr 1fr 0.45fr;
    align-items: end;
  }

  .billing-plan-description {
    grid-column: 1 / -1;
  }
}

.quality-chip {
  display: inline-flex;
  align-items: center;
  width: max-content;
  border: 0;
  border-radius: 999px;
  padding: 0.22rem 0.55rem;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 800;
  white-space: nowrap;
}

button.quality-chip {
  cursor: pointer;
  font-family: inherit;
}

.inline-form {
  margin: 0;
}

.matching-edit-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(220px, 100%), 1fr));
  gap: 1rem;
  margin: 0.75rem 0 1rem;
}

.matching-edit-summary > div {
  display: grid;
  gap: 0.25rem;
  min-width: 0;
  padding: 0.85rem 1rem;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.matching-edit-summary small {
  color: var(--ink-muted);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 800;
}

.matching-edit-summary strong {
  overflow-wrap: anywhere;
}

.analytics-table tr.is-current-row td {
  background: var(--primary-soft);
}

.matching-edit-grid {
  display: grid;
  gap: 0.85rem;
  margin-top: 1rem;
}

.matching-choice-editor {
  display: grid;
  gap: 0.75rem;
  margin-top: 1rem;
}

.matching-choice-row {
  display: grid;
  grid-template-columns: minmax(4rem, 0.22fr) minmax(0, 1fr);
  gap: 0.75rem;
  padding: 0.85rem;
  border: 1px dashed var(--rule);
  border-radius: var(--radius);
  background: var(--paper);
}

.matching-edit-row {
  display: grid;
  grid-template-columns: minmax(7rem, 0.42fr) minmax(0, 0.85fr) minmax(0, 0.9fr);
  gap: 0.85rem;
  align-items: start;
  padding: 0.9rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--surface);
}

.matching-choice-row label,
.matching-edit-row label {
  min-width: 0;
}

.matching-choice-row input,
.matching-choice-row textarea,
.matching-edit-row input,
.matching-edit-row select,
.matching-edit-row textarea {
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

.reviewer-note-panel {
  display: grid;
  gap: 0.45rem;
  padding: 1rem 1.15rem;
  background: var(--accent-soft);
  border: 1px solid rgba(211, 160, 31, 0.24);
  border-radius: var(--radius);
}

.reviewer-note-panel p {
  margin: 0;
  color: var(--ink);
}

.reviewer-note-entry {
  display: grid;
  gap: 0.2rem;
  padding-top: 0.65rem;
  border-top: 1px solid rgba(211, 160, 31, 0.24);
}

.reviewer-note-entry:first-of-type {
  padding-top: 0;
  border-top: 0;
}

.reviewer-note-entry small {
  color: var(--ink-muted);
}

.muted-text {
  color: var(--ink-muted);
}

.matching-edit-row.is-current-row {
  border-color: rgba(15, 76, 58, 0.28);
  background: var(--primary-soft);
}

.matching-edit-label {
  display: grid;
  gap: 0.2rem;
  padding-top: 0.4rem;
}

.matching-edit-label small {
  color: var(--ink-muted);
}

@media (max-width: 780px) {
  .matching-choice-row,
  .matching-edit-row {
    grid-template-columns: 1fr;
  }
}

.quality-chip--ok {
  background: var(--correct-bg);
  color: var(--correct);
}

.quality-chip--warn {
  background: var(--accent-soft);
  color: #8A6514;
}

.pricing-page {
  display: grid;
  gap: 1.5rem;
}

.subscription-result-card {
  display: grid;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-lg);
}

.subscription-result-card strong {
  display: block;
  margin: 0.15rem 0;
  font-family: var(--font-display);
  font-size: 2.4rem;
  color: var(--primary);
}

.subscription-result-card small,
.subscription-result-card p {
  color: var(--ink-muted);
}

.subscription-topic-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.4rem;
}

.subscription-topic-list span {
  display: inline-flex;
  padding: 0.35rem 0.6rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: #8A6514;
  font-size: 0.82rem;
  font-weight: 800;
}

.pricing-grid {
  display: grid;
  gap: 1rem;
}

.pricing-card {
  position: relative;
  display: grid;
  gap: 0.45rem;
  padding: 1.25rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
}

.plan-choice-card {
  cursor: pointer;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.plan-choice-card:hover {
  transform: translateY(-1px);
  border-color: var(--primary);
}

.pricing-card.is-featured,
.plan-choice-card.is-selected {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.pricing-card h2 {
  margin: 0.35rem 0;
}

.plan-radio {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.plan-card-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
}

.payment-mode-note {
  margin: -0.6rem 0 0;
  color: var(--ink-muted);
  font-size: 0.9rem;
}

.plan-price {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--primary);
  margin: 0 0 0.35rem;
}

.plan-description {
  color: var(--ink-muted);
}

.plan-benefit {
  position: relative;
  padding-left: 1rem;
  color: var(--ink);
  font-size: 0.9rem;
}

.plan-benefit::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 0.35rem;
  height: 0.35rem;
  border-radius: 999px;
  background: var(--primary);
}

.subscribe-form {
  gap: 1.25rem;
}

.plan-choice-section,
.subscription-account-section {
  display: grid;
  gap: 0.85rem;
}

.plan-choice-section h2,
.subscription-account-section h2 {
  margin: 0.15rem 0 0;
}

.subscription-account-card {
  display: grid;
  gap: 0.2rem;
  padding: 1rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--bg);
}

.subscription-account-card strong {
  font-family: var(--font-display);
  font-size: 1.25rem;
}

.subscription-account-card small {
  color: var(--ink-muted);
}

.subscription-trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  color: var(--ink-muted);
  font-size: 0.92rem;
}

.subscription-submit {
  justify-self: start;
}

.payment-page {
  display: grid;
  gap: 1.25rem;
}

.payment-card {
  display: grid;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-lg);
}

.payment-card strong {
  display: block;
  margin-top: 0.15rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
}

.payment-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.payment-note p,
.payment-status {
  color: var(--ink-muted);
  margin: 0;
}

.payment-progress {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--ink-muted);
}

.payment-progress p {
  margin: 0;
}

.staff-grid,
.stats-grid,
.filter-bar {
  display: grid;
  gap: 1rem;
}

.stats-grid {
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

.stat-card,
.auth-card,
.question-preview,
.form-section,
.empty-panel {
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
}

.auth-card h2,
.form-section h2,
.dashboard-section h2 {
  margin-top: 0;
}

.stack-form,
.review-form,
.form-section {
  display: grid;
  gap: 1rem;
}

.stack-form label,
.review-form label,
.filter-bar label {
  display: grid;
  gap: 0.35rem;
  color: var(--ink-muted);
  font-size: 0.85rem;
  font-weight: 700;
}

.stack-form input,
.stack-form select,
.stack-form textarea,
.review-form input,
.review-form select,
.review-form textarea,
.filter-bar select {
  width: 100%;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 0.75rem 0.85rem;
  background: var(--bg);
  color: var(--ink);
  font: inherit;
}

.stack-form ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.35rem;
}

.stack-form li label {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--ink);
  font-weight: 500;
}

.dashboard-section,
.review-list {
  display: grid;
  gap: 0.85rem;
}

.review-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.review-list-item > div {
  display: grid;
  gap: 0.25rem;
}

.review-list-item small {
  color: var(--ink-muted);
}

.review-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.review-actions--start {
  justify-content: flex-start;
}

.dashboard-shell--narrow {
  max-width: 52rem;
}

.review-modal {
  width: min(44rem, calc(100vw - 2rem));
  padding: 0;
  border: 0;
  border-radius: var(--radius-lg);
  background: transparent;
  color: var(--ink);
}

.review-modal::backdrop {
  background: rgba(20, 16, 10, 0.45);
  backdrop-filter: blur(4px);
}

.review-modal-panel {
  padding: 1.4rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.review-modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.review-modal-header h2 {
  margin: 0 0 0.35rem;
}

.review-modal-header p {
  margin: 0;
  color: var(--ink-muted);
}

.review-modal-close {
  width: 2.35rem;
  height: 2.35rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--bg);
  color: var(--ink);
  font: inherit;
  font-size: 1.35rem;
  line-height: 1;
  cursor: pointer;
}

/* Reviewer meta line (time, date, who reviewed) */
.review-meta {
  color: var(--ink-muted);
  font-size: 0.8rem;
}

/* "Last reviewed by …" line above the question form */
.review-last-meta {
  font-size: 0.88rem;
  color: var(--ink-muted);
  margin: 0 0 1.25rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.25rem 0.5rem;
}

.result-status--inline {
  display: inline;
  padding: 0.1em 0.45em;
  font-size: 0.8em;
}

/* Change history collapsible panel */
.change-history {
  margin-top: 2rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
}

.change-history-toggle {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem 1.25rem;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  background: var(--surface-alt);
  user-select: none;
  list-style: none;
}

.change-history-toggle::-webkit-details-marker { display: none; }
.change-history[open] .change-history-toggle { border-bottom: 1px solid var(--rule); }

.change-history-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.4em;
  height: 1.4em;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0 0.35em;
}

.change-history-entry {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--rule);
}
.change-history-entry:last-child { border-bottom: none; }

.change-history-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.65rem;
  font-size: 0.88rem;
  color: var(--ink-muted);
}
.change-history-header strong { color: var(--ink); }

.change-history-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
.change-history-table th {
  text-align: left;
  padding: 0.3rem 0.5rem;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
  border-bottom: 1px solid var(--rule);
}
.change-history-table td {
  padding: 0.4rem 0.5rem;
  vertical-align: top;
  border-bottom: 1px solid var(--rule);
  word-break: break-word;
}
.change-history-table tr:last-child td { border-bottom: none; }

.change-before { color: var(--incorrect); background: var(--incorrect-bg); }
.change-after  { color: var(--correct);   background: var(--correct-bg); }

.change-history-note {
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin: 0;
}

.page-top-actions {
  margin-bottom: 0.5rem;
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.pagination-status {
  color: var(--ink-muted);
  font-weight: 700;
}

.btn-disabled {
  opacity: 0.45;
  pointer-events: none;
}

.progress-track {
  width: 100%;
  height: 0.65rem;
  overflow: hidden;
  border-radius: 999px;
  background: var(--rule);
}

.progress-track span {
  display: block;
  height: 100%;
  background: var(--primary);
  border-radius: inherit;
}

.question-preview {
  display: grid;
  gap: 0.75rem;
  max-width: 100%;
  overflow: hidden;
}

.question-preview p {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.1rem;
  line-height: 1.5;
}

.student-preview-body {
  display: grid;
  gap: 0.45rem;
  max-width: 100%;
  overflow: hidden;
}

.student-preview-prose {
  overflow-wrap: anywhere;
}

.editor-preview {
  display: grid;
  gap: 0.5rem;
  padding: 0.85rem;
  border: 1px dashed var(--rule);
  border-radius: var(--radius);
  background: var(--bg);
}

.editor-preview-body {
  min-height: 2rem;
  color: var(--ink);
  max-width: 100%;
  overflow: hidden;
  white-space: normal;
}

.editor-preview-body .math-content,
.editor-preview-body mjx-container {
  max-width: 100%;
  overflow: visible;
  white-space: normal;
}

.editor-preview-lines {
  display: grid;
  gap: 0.45rem;
}

.editor-preview-line {
  display: block;
  margin-top: 0.45rem;
  max-width: 100%;
  white-space: normal;
  overflow-wrap: anywhere;
  word-break: normal;
}

.editor-preview-line:first-child {
  margin-top: 0;
}

.editor-preview-prose {
  font-family: var(--font-display);
  font-size: 1.05rem;
  line-height: 1.65;
  overflow: hidden;
  text-overflow: clip;
}

.editor-preview-inline-math {
  display: inline;
  max-width: 100%;
  overflow-wrap: anywhere;
  vertical-align: middle;
}

.editor-preview-inline-math mjx-container {
  max-width: 100%;
  overflow: visible;
  white-space: normal;
}

.editor-preview-body p {
  margin: 0.35rem 0 0;
  color: var(--ink-muted);
  font-size: 0.9rem;
}

.editor-preview-body code {
  display: inline-block;
  max-width: 100%;
  overflow-wrap: anywhere;
  color: var(--primary);
}

.smiles-preview-canvas {
  display: block;
  max-width: 100%;
  height: auto;
  margin-top: 0.6rem;
  background: white;
  border-radius: var(--radius);
}

@media (min-width: 860px) {
  .staff-grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }

  .filter-bar {
    grid-template-columns: minmax(180px, 1fr) minmax(140px, 0.7fr) auto auto;
    align-items: end;
  }
}

.onboarding-ready,
.ready-actions {
  display: grid;
  gap: 1rem;
}

.ready-actions {
  align-items: start;
}

@media (min-width: 760px) {
  .subscription-result-card {
    grid-template-columns: 0.7fr 1fr;
    align-items: center;
  }

  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .payment-card {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .ready-actions {
    grid-template-columns: auto auto;
    justify-content: start;
  }
}

@media (min-width: 720px) {
  .continue-card {
    grid-template-columns: 1fr auto;
    align-items: center;
  }
}

.hero {
  width: min(calc(100vw - 2.5rem), 1180px);
  min-height: 30rem;
  margin: 2.25rem auto 2.75rem;
  position: relative;
  display: grid;
  grid-template-columns: minmax(18rem, 0.9fr) minmax(24rem, 1fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}
.hero-text {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 1rem 0;
}

.hero-visual {
  position: relative;
  z-index: 1;
  width: 100%;
  min-width: min(100%, 32rem);
  padding: 1.25rem;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 2.75rem 0.35rem 0.2rem;
  z-index: -1;
  border-radius: 26px;
  background: linear-gradient(135deg, rgba(232, 239, 235, 0.62), rgba(247, 239, 216, 0.38));
}

.hero-image {
  width: 100%;
  aspect-ratio: 3 / 2;
  background:
    url("../img/iga_hero.png") center center / cover no-repeat,
    var(--surface);
  min-height: 0;
  border-radius: 22px;
  box-shadow: 0 22px 60px -36px rgba(20, 30, 25, 0.38);
}

.hero-float-card {
  position: absolute;
  z-index: 2;
  display: grid;
  gap: 0.28rem;
  min-width: 12rem;
  padding: 0.85rem 0.95rem;
  border: 1px solid rgba(229, 223, 211, 0.82);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 18px 45px -32px rgba(20, 30, 25, 0.42);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transform: translateY(0) scale(1);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
  will-change: transform;
  animation: hero-card-float 5.8s ease-in-out infinite;
}

.hero-float-card:hover {
  transform: translateY(-6px) scale(1.025);
  border-color: rgba(15, 76, 58, 0.22);
  box-shadow: 0 24px 55px -30px rgba(20, 30, 25, 0.5);
  animation-play-state: paused;
}

.hero-float-card span {
  color: var(--ink-muted);
  font-size: 0.85rem;
  font-weight: 700;
}

.hero-float-card strong {
  color: var(--ink);
  font-size: 0.95rem;
}

.hero-float-card--math {
  left: 0;
  bottom: 5.5rem;
  animation-delay: 0s;
}

.hero-float-card--biology {
  right: 0.2rem;
  bottom: 2.4rem;
  animation-delay: -1.8s;
}

.hero-float-card--ai {
  left: 3.4rem;
  top: 0.3rem;
  animation-delay: -3.4s;
}

@keyframes hero-card-float {
  0%, 100% { translate: 0 0; }
  50% { translate: 0 -10px; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-float-card {
    animation: none;
  }
}

.hero-mini-progress {
  width: 100%;
  height: 0.42rem;
  overflow: hidden;
  border-radius: 999px;
  background: var(--rule);
}

.hero-mini-progress span {
  display: block;
  width: 82%;
  height: 100%;
  background: var(--primary);
}
.hero-title {
  font-weight: 500;
  letter-spacing: -0.025em;
  max-width: 9.2em;
}
.hero-title em {
  font-style: italic;
  color: var(--primary);
  font-weight: 400;
}
.hero-sub {
  margin-top: 1.25rem;
  font-size: 1.05rem;
  max-width: 32rem;
  color: var(--ink-muted);
  line-height: 1.6;
}

.hero-register {
  margin: 1rem 0 0;
  color: var(--ink-muted);
  font-size: 0.95rem;
}

.hero-register a {
  font-weight: 700;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.hero.is-dismissed {
  display: none;
}

@media (max-width: 680px) {
  .hero {
    width: min(calc(100vw - 1.5rem), 1180px);
    grid-template-columns: 1fr;
    gap: 1.5rem;
    min-height: auto;
    margin-top: 1rem;
  }

  .hero::before {
    display: none;
  }

  .hero-text {
    order: 1;
    padding: 0.75rem 0 0;
  }

  .hero-visual {
    order: 2;
    padding: 0.9rem 0.2rem 4.2rem;
  }

  .hero-image {
    min-height: 0;
    border-radius: 18px;
  }

  .hero-float-card {
    min-width: 9.8rem;
    padding: 0.7rem 0.8rem;
  }

  .hero-float-card--math {
    left: 0.45rem;
    bottom: 1.25rem;
  }

  .hero-float-card--biology {
    right: 0.45rem;
    bottom: 0.7rem;
  }

  .hero-float-card--ai {
    left: 1.2rem;
    top: 0;
  }
}

@media (max-width: 420px) {
  .hero-text {
    padding: 1rem;
  }

  .hero-image {
    min-height: 0;
  }
  .hero {
    width: min(calc(100vw - 1.25rem), 1180px);
  }
}

/* =============================================
   Subjects & topics (home)
   ============================================= */
.subjects { display: grid; gap: 2.5rem; }
.subject-head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.5rem;
  margin-bottom: 1rem;
}
.subject-level {
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.3rem 0.6rem;
  border-radius: 999px;
  font-weight: 600;
}
.subject-name {
  font-size: 1.6rem;
  font-weight: 500;
  font-family: var(--font-display);
}
.topics { display: grid; gap: 0.75rem; }

.topic-card {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 0.5rem 1rem;
  padding: 1.25rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--ink);
  transition: transform 120ms ease, box-shadow 120ms ease, border-color 120ms ease;
}
.topic-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.subject-start-card {
  padding: 0;
}

.subject-start-card button {
  appearance: none;
  border: 0;
  background: transparent;
  width: 100%;
  padding: 1.25rem 1.5rem;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 0.5rem 1rem;
  cursor: pointer;
  text-align: left;
}

.subject-start-card button:focus-visible {
  outline: 3px solid var(--primary-soft);
  outline-offset: 3px;
}
.topic-meta {
  grid-column: 1;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.topic-name {
  grid-column: 1;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 500;
  line-height: 1.3;
}
.topic-cta {
  grid-column: 2;
  grid-row: 1;
  font-size: 0.9rem;
  color: var(--primary);
  font-weight: 500;
  align-self: center;
  white-space: nowrap;
}

/* =============================================
   Topic intro
   ============================================= */
.breadcrumb {
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin-bottom: 1.5rem;
}
.breadcrumb a { color: var(--primary); }
.breadcrumb .sep { margin: 0 0.5rem; opacity: 0.5; }

.topic-header { margin-bottom: 2rem; }
.topic-title {
  font-size: clamp(1.8rem, 3vw + 1rem, 2.8rem);
  font-weight: 500;
}
.topic-kicker {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  margin: 0 0 0.6rem;
}
.topic-stats {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 0.5rem;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 1rem 0;
}
.topic-stats li {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.stat-label {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.stat-value {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 500;
}

.passage {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
  margin: 2rem 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  line-height: 1.7;
}
.passage-label {
  display: block;
  font-family: var(--font-body);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 1rem;
}
.passage-body p:first-of-type { margin-top: 0; }

.exam-brief {
  display: grid;
  gap: 1rem;
  margin: 2rem 0;
}

.brief-section {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
}

.brief-section h2 {
  font-size: 1.25rem;
  margin: 0 0 0.75rem;
}

.brief-label {
  display: block;
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 0.45rem;
}

.brief-list {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--ink-muted);
}

.brief-list li + li {
  margin-top: 0.35rem;
}

.last-score {
  display: grid;
  gap: 0.25rem;
  margin: 0;
}

.last-score strong {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 500;
  color: var(--primary);
}

.last-score span {
  color: var(--ink-muted);
}

.last-score--empty strong {
  font-size: 1.25rem;
  color: var(--ink);
}

@media (min-width: 800px) {
  .exam-brief {
    grid-template-columns: 1fr 1fr;
  }

  .brief-score {
    grid-column: 1 / -1;
  }
}

.start-form {
  display: grid;
  gap: 0.75rem;
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
}
.start-form label {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  font-weight: 600;
}
.start-form input[type="text"] {
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  font-size: 1rem;
  background: var(--bg);
  transition: border-color 120ms ease, box-shadow 120ms ease;
}
.start-form input[type="text"]:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}
.start-note {
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin: 0.25rem 0 0;
  font-style: italic;
}

.prepare-panel {
  margin-top: 2rem;
  padding: 1.75rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  display: grid;
  justify-items: center;
  text-align: center;
  gap: 1rem;
}

.prepare-panel.is-active {
  animation: card-in 220ms ease-out both;
}

.prepare-spinner {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 3px solid var(--rule);
  border-top-color: var(--primary);
  animation: prepare-spin 900ms linear infinite;
}

@keyframes prepare-spin {
  to { transform: rotate(360deg); }
}

.prepare-message {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--primary);
  margin: 0;
  min-height: 1.8rem;
}

.prepare-tip {
  max-width: 34rem;
  color: var(--ink-muted);
  font-size: 0.95rem;
  margin: 0;
}

/* =============================================
   Buttons
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 500;
  font-size: 1rem;
  cursor: pointer;
  text-decoration: none;
  transition: background 120ms ease, transform 80ms ease, box-shadow 120ms ease;
}
.btn-primary {
  background: var(--primary);
  color: #FAF7F2;
  border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-deep);
  color: #FAF7F2;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-primary:active { transform: translateY(0); }

/* =============================================
   Live session
   ============================================= */
.session { display: grid; gap: 1.5rem; }
.session-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  position: sticky;
  top: 4.5rem;
  z-index: 30;
}
.session-meta { display: flex; flex-direction: column; gap: 0.15rem; min-width: 0; }
.session-topic {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.session-student {
  font-size: 0.75rem;
  color: var(--ink-muted);
  letter-spacing: 0.05em;
}
.session-timer {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.1rem;
}
.timer-label {
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.timer-value {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  transition: color 200ms ease;
}
.timer-warning { color: var(--accent) !important; }
.timer-critical { color: var(--incorrect) !important; animation: pulse 1s ease-in-out infinite; }
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.55; }
}

/* =============================================
   Question card
   ============================================= */
.qcard {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  animation: card-in 220ms ease-out both;
}
@keyframes card-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.qcard-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  border-bottom: 1px dashed var(--rule);
  margin-bottom: 1.25rem;
}
.qcard-progress { font-size: 0.85rem; color: var(--ink-muted); letter-spacing: 0.02em; }
.qcard-progress strong { color: var(--ink); font-family: var(--font-display); font-weight: 500; font-size: 1.1rem; }
.qcard-marks {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-weight: 600;
}

.question-source-panel {
  display: grid;
  gap: 0.2rem;
  margin: -0.25rem 0 1.35rem;
  padding: 0.85rem 1rem;
  background: var(--primary-soft);
  border: 1px solid rgba(15, 76, 58, 0.18);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius);
}

.question-source-panel span,
.result-source span {
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--primary);
  font-weight: 800;
}

.question-source-panel strong,
.result-source strong {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.25;
}

.question-source-panel small,
.result-source small {
  color: var(--ink-muted);
  font-size: 0.78rem;
}

.question-source-panel--feedback {
  margin: 0 0 1.35rem;
}

.qcard-text {
  font-family: var(--font-display);
  font-size: 1.25rem;
  line-height: 1.5;
  font-weight: 500;
  margin: 0 0 1.5rem;
  color: var(--ink);
  overflow-wrap: anywhere;
  word-break: break-word;
}

[data-typewriter] {
  overflow-wrap: anywhere;
  word-break: break-word;
}

.question-image-wrap {
  margin: 0 0 1.5rem;
  overflow: hidden;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--surface);
}

.question-image {
  display: block;
  width: 100%;
  max-height: min(58vh, 620px);
  object-fit: contain;
}

.result-question-image {
  margin-bottom: 0.75rem;
}

.options { display: grid; gap: 0.6rem; margin-bottom: 1.5rem; }
.options--inline { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }

.option {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 0.85rem;
  padding: 0.9rem 1rem;
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease;
}
.option:hover {
  background: var(--surface-alt);
  border-color: var(--primary);
}
.option input[type="radio"] {
  appearance: none;
  -webkit-appearance: none;
  width: 1.1rem;
  height: 1.1rem;
  border: 2px solid var(--rule);
  border-radius: 50%;
  margin: 0.2rem 0 0;
  cursor: pointer;
  position: relative;
  transition: border-color 120ms ease;
}
.option input[type="radio"]:checked {
  border-color: var(--primary);
}
.option input[type="radio"]:checked::after {
  content: "";
  position: absolute;
  inset: 2px;
  background: var(--primary);
  border-radius: 50%;
}
.option:has(input:checked) {
  background: var(--primary-soft);
  border-color: var(--primary);
}
.option-key {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--primary);
  font-size: 0.95rem;
  display: none;  /* the radio + key would be redundant; key is encoded in radio */
}
.option-text {
  font-size: 0.98rem;
  line-height: 1.45;
}

.matching-question {
  display: grid;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.matching-term-card,
.matching-reference,
.matching-feedback {
  min-width: 0;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--bg);
  padding: 1rem;
}

.matching-term-card {
  display: grid;
  gap: 0.35rem;
  border-left: 4px solid var(--primary);
}

.matching-term-card strong {
  font-family: var(--font-display);
  font-size: 1.2rem;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.matching-reference {
  background: var(--surface-alt);
}

.matching-reference-list {
  display: grid;
  gap: 0.55rem;
  margin-top: 0.7rem;
}

.matching-reference-row {
  display: grid;
  grid-template-columns: 2.75rem minmax(0, 1fr);
  gap: 0.75rem;
  align-items: start;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 0.75rem;
}

.matching-reference-row strong {
  font-family: var(--font-display);
  color: var(--primary);
  line-height: 1.4;
}

.matching-reference-row span {
  min-width: 0;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.matching-select-label {
  display: grid;
  gap: 0.45rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}

.matching-select-label select {
  width: 100%;
  min-height: 3.1rem;
  border: 1.5px solid var(--rule);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--ink);
  font: 600 1rem/1.35 var(--font-body);
  padding: 0.85rem 1rem;
}

.matching-select-label select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

textarea {
  width: 100%;
  padding: 0.85rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--bg);
  font-size: 1rem;
  resize: vertical;
}
textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }

.qcard-submit { width: 100%; }

.short-answer-wrap {
  display: grid;
  gap: 0.5rem;
}

.short-answer-label {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
}

.short-answer-textarea {
  min-height: 120px;
  border: 1.5px solid var(--rule);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  font-size: 1rem;
  font-family: var(--font-body);
  background: var(--bg);
  resize: vertical;
  line-height: 1.6;
  transition: border-color 120ms ease, box-shadow 120ms ease;
}

.short-answer-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

.short-answer-hint {
  font-size: 0.78rem;
  color: var(--ink-muted);
  font-style: italic;
}

.qcard-form[data-reveal-after-typewriter] {
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
}

.qcard-form[data-reveal-after-typewriter].is-revealed {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
  animation: answers-in 260ms ease-out both;
}

@keyframes answers-in {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.qcard-foot {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--rule);
}
.qcard-source {
  font-size: 0.75rem;
  color: var(--ink-muted);
  letter-spacing: 0.04em;
  font-style: italic;
}

/* Marking overlay */
.marking-overlay {
  position: absolute;
  inset: 0;
  background: rgba(250, 247, 242, 0.9);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  border-radius: var(--radius-lg);
  font-size: 0.95rem;
  color: var(--ink-muted);
  font-style: italic;
  z-index: 10;
}
.marking-overlay.htmx-request { display: flex; }
.htmx-request .marking-overlay { display: flex; }
.marking-pulse {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--primary) 30%, transparent 31%);
  animation: mark-pulse 1.2s ease-in-out infinite;
}
@keyframes mark-pulse {
  0%, 100% { transform: scale(0.6); opacity: 0.4; }
  50%      { transform: scale(1);   opacity: 1; }
}

/* =============================================
   Results page
   ============================================= */
.results-head {
  text-align: center;
  margin: 1rem 0 3rem;
}
.results-eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin: 0 0 1rem;
}
.results-score {
  font-family: var(--font-display);
  font-size: clamp(4rem, 12vw + 1rem, 7rem);
  line-height: 1;
  font-weight: 500;
  margin: 0;
  letter-spacing: -0.04em;
}
.score-num { color: var(--primary); }
.score-divider { color: var(--rule); margin: 0 0.2rem; font-weight: 300; }
.score-total { color: var(--ink-muted); font-weight: 400; }
.results-percent {
  margin: 0.5rem 0 0;
  font-size: 1.2rem;
  font-family: var(--font-display);
  color: var(--ink);
}
.results-name {
  margin: 0.25rem 0 0;
  font-size: 0.9rem;
  color: var(--ink-muted);
  font-style: italic;
}

.results-section-title {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  font-family: var(--font-body);
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--rule);
}

.results-list { display: grid; gap: 1.25rem; }

.results-insights {
  display: grid;
  gap: 1rem;
  margin: 0 0 2rem;
}

.results-source-summary {
  display: grid;
  gap: 1rem;
  margin: -1.25rem 0 2rem;
  padding: 1.1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-lg);
}

.results-source-summary p {
  margin: 0;
  color: var(--ink-muted);
}

.source-year-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.source-year-list li {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  padding: 0.45rem 0.65rem;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
}

.source-year-list strong {
  font-family: var(--font-display);
}

.source-year-list span {
  font-size: 0.78rem;
  color: var(--ink-muted);
}

.insight-panel,
.results-register,
.review-questions {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
}

.insight-panel {
  padding: 1.1rem 1.25rem;
}

.insight-panel p {
  margin: 0;
  color: var(--ink-muted);
}

.insight-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.insight-list li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px dashed var(--rule);
}

.insight-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.insight-list strong {
  font-family: var(--font-display);
  font-weight: 500;
}

.insight-list span {
  color: var(--primary);
  font-weight: 700;
}

@media (min-width: 760px) {
  .results-insights {
    grid-template-columns: 1fr 1fr;
  }

  .results-source-summary {
    grid-template-columns: 1fr auto;
    align-items: center;
  }
}

.review-questions {
  overflow: hidden;
}

.review-questions summary {
  list-style: none;
  cursor: pointer;
  padding: 1.1rem 1.25rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  font-family: var(--font-display);
  font-size: 1.1rem;
}

.review-questions summary::-webkit-details-marker {
  display: none;
}

.review-questions summary small {
  font-family: var(--font-body);
  color: var(--ink-muted);
  font-size: 0.85rem;
}

.review-questions .result-row {
  border-radius: 0;
  border-right: 0;
  border-bottom: 0;
  border-left-width: 4px;
}

.result-row {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--rule);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
}
.result-row.is-correct   { border-left-color: var(--correct); }
.result-row.is-incorrect { border-left-color: var(--incorrect); }

.result-row-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}
.result-num {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--ink-muted);
}
.result-status {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
}
.is-correct .result-status { background: var(--correct-bg); color: var(--correct); }
.is-incorrect .result-status { background: var(--incorrect-bg); color: var(--incorrect); }
.result-marks {
  margin-left: auto;
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--ink-muted);
  font-variant-numeric: tabular-nums;
}

.result-q {
  font-family: var(--font-display);
  font-size: 1.05rem;
  line-height: 1.5;
  margin: 0 0 0.75rem;
}

.result-detail {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 0.5rem 1rem;
  padding: 0.75rem 0;
  border-top: 1px dashed var(--rule);
  border-bottom: 1px dashed var(--rule);
  margin: 0 0 0.75rem;
}
.result-detail dt {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-muted);
  font-weight: 600;
  margin-bottom: 0.15rem;
}
.result-detail dd {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1rem;
}

.result-feedback {
  background: var(--surface-alt);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  margin-bottom: 0.75rem;
}
.feedback-label {
  display: block;
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 0.3rem;
}
.result-feedback p { margin: 0; font-size: 0.95rem; line-height: 1.55; }

.result-source {
  display: grid;
  gap: 0.15rem;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--rule);
}

.results-actions {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin: 2.5rem 0 0;
}

.results-register {
  margin: 2.5rem 0 0;
  padding: 1.5rem;
  display: grid;
  gap: 0.75rem;
  background: var(--primary-soft);
  border-color: rgba(15, 76, 58, 0.22);
}

.results-register p {
  color: var(--ink-muted);
  margin: 0;
}

/* =============================================
   Empty / utility
   ============================================= */
.empty {
  padding: 1rem;
  text-align: center;
  color: var(--ink-muted);
  font-style: italic;
}

/* =============================================
   Onboarding panel (home)
   ============================================= */
.onboarding {
  width: min(100%, 640px);
  margin: 2rem auto 2.5rem;
}

.onboarding,
.onboard-step--topics {
  position: relative;
}

.onboard-step--topics {
  width: min(100%, 760px);
  margin-left: auto;
  margin-right: auto;
}

.onboard-step {
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  display: grid;
  gap: 0.75rem;
  opacity: 0;
  transform: translateY(8px);
}

.onboard-step.is-active {
  animation: step-in 240ms ease-out both;
}

#step-greeting.is-active + #step-level.is-active,
#step-greeting.is-active ~ #step-level.is-active {
  margin-top: 1rem;
}

@keyframes step-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.step-kicker {
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
}

.onboard-step label {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  font-weight: 600;
}

.onboard-step input[type="text"] {
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  transition: border-color 120ms ease, box-shadow 120ms ease;
  width: 100%;
  box-sizing: border-box;
}

.onboard-step input[type="text"]:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

.greeting-line {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--primary);
  font-style: italic;
  min-height: 2rem;
  margin: 0;
}

.onboard-prompt {
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin: 0;
}

.level-pills {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .level-pills { grid-template-columns: repeat(3, 1fr); }
}

.level-pill {
  padding: 0.65rem 1.2rem;
  border: 1.5px solid var(--rule);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--ink);
  font-size: 0.9rem;
  font-family: var(--font-body);
  font-weight: 500;
  cursor: pointer;
  transition: border-color 120ms ease, background 120ms ease, transform 80ms ease;
  min-height: 3rem;
}

.level-pill:hover {
  border-color: var(--primary);
  background: var(--primary-soft);
  transform: translateY(-1px);
}

.level-pill:active { transform: translateY(0); }

.level-pill.is-selected {
  background: var(--primary);
  color: #FAF7F2;
  border-color: var(--primary);
}

.topics-greeting {
  font-size: 1rem;
  color: var(--ink-muted);
  margin: 0 0 1.25rem;
}

.level-feedback {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--primary);
  margin: 0 0 1rem;
  min-height: 1.8rem;
}

/* =============================================
   Typewriter cursor
   ============================================= */
.tw-active::after {
  content: "|";
  display: inline;
  color: var(--primary);
  animation: tw-blink 0.7s step-end infinite;
  margin-left: 1px;
}

@keyframes tw-blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

/* =============================================
   Feedback card
   ============================================= */
.feedback-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--rule);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  animation: card-in 220ms ease-out both;
  display: grid;
  gap: 1.25rem;
}

.feedback-card--correct {
  border-left-color: var(--correct);
  background: linear-gradient(135deg, var(--correct-bg) 0%, var(--surface) 50%);
}

.feedback-card--incorrect {
  border-left-color: var(--incorrect);
  background: linear-gradient(135deg, var(--incorrect-bg) 0%, var(--surface) 50%);
}

.feedback-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  border-bottom: 1px dashed var(--rule);
}

.feedback-verdict {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
}

.feedback-card--correct .feedback-verdict { color: var(--correct); }
.feedback-card--incorrect .feedback-verdict { color: var(--incorrect); }

.feedback-body {
  display: grid;
  gap: 1rem;
}

.matching-feedback {
  display: grid;
  gap: 1rem;
  background: var(--surface-alt);
}

.matching-feedback-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.matching-feedback-grid > div {
  display: grid;
  gap: 0.3rem;
  min-width: 0;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 0.85rem;
}

.matching-feedback-grid small {
  color: var(--ink-muted);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.matching-feedback-grid strong {
  min-width: 0;
  overflow-wrap: anywhere;
}

.matching-reference-list--feedback {
  margin-top: 0;
}

.matching-reference-row--correct {
  border-color: rgba(15, 76, 58, 0.35);
  background: var(--correct-bg);
}

.matching-reference-row--selected-wrong {
  border-color: rgba(184, 69, 59, 0.45);
  background: var(--incorrect-bg);
}

.feedback-your-answer {
  font-size: 0.9rem;
  color: var(--ink-muted);
  margin: 0;
  min-width: 0;
  overflow-wrap: anywhere;
}

.feedback-explanation {
  background: var(--surface-alt);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  min-width: 0;
  overflow: hidden;
}

.feedback-ai-label {
  display: block;
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.feedback-ai-text {
  font-family: var(--font-display);
  font-size: 1.05rem;
  line-height: 1.65;
  margin: 0;
  min-height: 1.65em;
  min-width: 0;
  overflow-wrap: anywhere;
  word-break: normal;
}

.feedback-ai-text strong {
  color: var(--primary);
  font-weight: 700;
}

.feedback-ai-text br + br {
  display: block;
  content: "";
  margin-top: 0.5rem;
}

.math-content,
.feedback-math-line {
  max-width: 100%;
  min-width: 0;
}

.feedback-math-line {
  display: block;
  margin-top: 0.45rem;
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
}

.feedback-prose-line {
  display: block;
  margin-top: 0.45rem;
  overflow-wrap: anywhere;
}

.inline-math {
  display: inline-block;
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  vertical-align: middle;
  -webkit-overflow-scrolling: touch;
}

.feedback-correct-answer {
  display: block;
  margin-top: 0.35rem;
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
}

/* Ensure MathJax SVG output scales and scrolls horizontally if too wide, rather than overflowing */
mjx-container {
  max-width: 100% !important;
  overflow-x: auto !important;
  overflow-y: hidden !important;
  -webkit-overflow-scrolling: touch;
}

.math-content mjx-container,
.feedback-math-line mjx-container {
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  white-space: normal;
  vertical-align: middle;
}

.inline-math mjx-container {
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  vertical-align: middle;
}

.feedback-math-line mjx-container {
  display: block;
  padding-bottom: 0.15rem;
}

.feedback-correct-answer mjx-container {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
}

.feedback-math-line svg {
  max-width: none;
}

@media (max-width: 520px) {
  .feedback-card {
    padding: 1.25rem;
  }

  .feedback-explanation {
    padding: 0.85rem;
  }

  .feedback-ai-text {
    font-size: 0.98rem;
  }

  .qcard {
    padding: 1.25rem;
  }

  .options--inline {
    grid-template-columns: 1fr;
  }

  .matching-feedback-grid {
    grid-template-columns: 1fr;
  }

  .matching-reference-row {
    grid-template-columns: 2.25rem minmax(0, 1fr);
  }

  .result-detail {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }
}

.feedback-foot {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  padding-top: 0.25rem;
}

.feedback-progress {
  font-size: 0.8rem;
  color: var(--ink-muted);
  font-style: italic;
}

.start-greeting {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--primary);
  font-style: italic;
  margin: 0 0 0.25rem;
}

/* =============================================
   exam-brief desktop fix (overrides line ~392)
   ============================================= */
@media (min-width: 800px) {
  .exam-brief {
    grid-template-columns: 2fr 1fr;
    align-items: start;
  }
  .brief-score {
    grid-column: auto;
  }
}

/* =============================================
   Full-screen prepare overlay
   ============================================= */
.prepare-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  opacity: 0;
  transition: opacity 300ms ease;
}
.prepare-overlay.is-visible { opacity: 1; }
.prepare-overlay .prepare-spinner {
  width: 52px;
  height: 52px;
  border: 3px solid var(--rule);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.prepare-overlay .prepare-message {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--primary);
  text-align: center;
  max-width: 22ch;
  margin: 0;
}

/* =============================================
   Account chip (header, top-right)
   ============================================= */
.account-chip {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--primary-soft);
  border: 1px solid var(--rule);
  border-radius: 9999px;
  padding: 0.3rem 0.75rem 0.3rem 0.45rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--primary);
  animation: chip-in 240ms ease-out both;
}
.account-chip span {
  display: inline-block;
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  vertical-align: middle;
}
@media (max-width: 620px) {
  .account-chip {
    flex-wrap: wrap;
    justify-content: center;
    border-radius: var(--radius);
    padding: 0.4rem 0.6rem;
  }
  .account-chip span {
    max-width: 100px;
  }
}
@keyframes chip-in {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.account-chip-avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
}
.account-chip-logout {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0 0 0 0.4rem;
  border-left: 1px solid var(--rule);
  margin-left: 0.4rem;
  color: var(--ink-muted);
  font-size: 0.75rem;
  line-height: 1;
}
.account-chip-logout:hover { color: var(--incorrect); }

.profile-chip {
  text-decoration: none;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 0.25rem 0.55rem;
  font-size: 0.72rem;
  font-weight: 700;
}

.profile-chip:hover {
  color: var(--primary);
}

/* =============================================
   Stats dashboard (home, returning students)
   ============================================= */
.stats-dashboard {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 2.5rem;
  animation: card-in 240ms ease-out both;
}
.stats-dashboard-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}
.stats-dashboard-head h2 {
  font-size: 0.78rem;
  color: var(--ink-muted);
  font-family: var(--font-body);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 600;
  margin: 0;
}
.stats-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}
.stat-tile {
  background: var(--surface-alt);
  border-radius: var(--radius);
  padding: 0.85rem 1.25rem;
  min-width: 90px;
}
.stat-tile-value {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 500;
  color: var(--primary);
  display: block;
  line-height: 1.1;
}
.stat-tile-label {
  font-size: 0.72rem;
  color: var(--ink-muted);
  margin-top: 0.2rem;
  display: block;
}
.past-exams-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin: 0 0 0.6rem;
}
.past-exams-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.45rem;
}
.past-exam-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--surface-alt);
  border-radius: var(--radius);
  padding: 0.6rem 0.9rem;
  font-size: 0.86rem;
}
.past-exam-topic {
  flex: 1;
  font-weight: 500;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.past-exam-score {
  color: var(--primary);
  font-family: var(--font-display);
  font-weight: 500;
  white-space: nowrap;
}
.past-exam-link {
  font-size: 0.76rem;
  color: var(--accent);
  text-decoration: none;
  white-space: nowrap;
  font-weight: 500;
}
.past-exam-link:hover { text-decoration: underline; }
.stats-cta {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.stats-cta-text {
  flex: 1;
  font-size: 0.86rem;
  color: var(--ink-muted);
}

/* =============================================
   Stats dashboard — score badge & topic variants
   ============================================= */
.score-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.55rem;
  border-radius: 9999px;
  font-size: 0.78rem;
  font-weight: 600;
  white-space: nowrap;
  font-family: var(--font-display);
}
.score-badge--pass {
  background: var(--correct-bg);
  color: var(--correct);
}
.score-badge--fail {
  background: var(--incorrect-bg);
  color: var(--incorrect);
}

/* Mobile-first CTA button */
.stats-cta-btn {
  width: 100%;
  min-height: 52px;
  font-size: 1rem;
  justify-content: center;
}
@media (min-width: 600px) {
  .stats-cta-btn {
    width: auto;
    min-height: 44px;
  }
  .stats-cta {
    flex-wrap: nowrap;
  }
}

/* =============================================
   Topic list — subject grouping & practiced state
   ============================================= */
.subject-group {
  display: grid;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
}
.subject-label {
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
  font-weight: 700;
  padding: 0 0.25rem;
}
.topic-card.is-practiced {
  border-left: 4px solid var(--correct);
  background: linear-gradient(135deg, var(--correct-bg) 0%, var(--surface) 60%);
}
.topic-practiced-badge {
  grid-column: 1 / -1;
  font-size: 0.75rem;
  color: var(--correct);
  font-weight: 500;
}

.flash-stack {
  display: grid;
  gap: 0.6rem;
  margin: 1rem 0;
}

.flash {
  margin: 0;
  padding: 0.85rem 1rem;
  border: 1px solid var(--rule);
  border-left: 4px solid var(--gold);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink);
  font-size: 0.95rem;
}

.flash-error {
  border-left-color: var(--incorrect);
  background: var(--incorrect-bg);
}