/* ==========================================================================
   Uncle Kwaku — Design System
   Study-desk theme from design.md: cool-gray canvas, white cards, one violet
   accent (#4255ff). Gold is reserved for "Pro" markers only.
   ========================================================================== */

:root {
  /* design.md — Colors */
  --color-iris-bolt: #4255ff;
  --color-ink-charcoal: #282e3e;
  --color-deep-indigo: #2e3856;
  --color-slate-veil: #586380;
  --color-fog-mist: #939bb4;
  --color-pure-black: #000000;
  --color-chalk-canvas: #f6f7fb;
  --color-paper-white: #ffffff;
  --color-lilac-wash: #edefff;
  --color-mist-border: #d9dde8;
  --color-accent-hover: #3447e8;
  --color-accent-ring: rgba(66, 85, 255, 0.2);

  /* design.md — Type scale */
  --text-caption: 12px;
  --text-body-sm: 14px;
  --text-body: 16px;
  --text-subheading: 20px;
  --text-heading-sm: 24px;
  --text-heading: 32px;
  --text-display: 44px;
  --font-weight-regular: 400;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* design.md — Spacing & layout */
  --spacing-8: 8px;
  --spacing-16: 16px;
  --spacing-24: 24px;
  --spacing-32: 32px;
  --spacing-40: 40px;
  --spacing-48: 48px;
  --spacing-64: 64px;
  --page-max-width: 1200px;
  --sidebar-width: 248px;
  --section-gap: 80px;
  --card-padding: 24px;
  --element-gap: 8px;

  /* design.md — Surfaces */
  --surface-page-canvas: #f6f7fb;
  --surface-card-surface: #ffffff;
  --surface-tinted-highlight: #edefff;
  --surface-feature-card-pastels: #dbdfff;

  /* Legacy ramp, remapped onto design.md roles */
  --primary-950: var(--color-ink-charcoal);
  --primary-900: var(--color-ink-charcoal);
  --primary-800: var(--color-deep-indigo);
  --primary-600: var(--color-iris-bolt);
  --primary-500: var(--color-iris-bolt);
  --primary-100: #dbdfff;
  --primary-50:  var(--color-lilac-wash);

  /* Gold: Pro badges and upgrade buttons only */
  --accent-gold: #f59e0b;
  --accent-gold-dark: #d97706;
  --accent-gold-light: #fef3c7;

  --surface-bg: var(--color-chalk-canvas);
  --surface-card: var(--color-paper-white);
  --surface-subtle: var(--color-chalk-canvas);
  --surface-hover: var(--color-lilac-wash);

  --text-main: var(--color-ink-charcoal);
  --text-muted: var(--color-slate-veil);
  --text-subtle: var(--color-fog-mist); /* placeholders / disabled only — fails contrast for text */
  --text-inverse: #ffffff;

  --border-light: var(--color-mist-border);
  --border-focus: var(--color-iris-bolt);

  --success-bg: #ecfdf5;
  --success-bg-strong: #d1fae5;
  --success-border: #10b981;
  --success-border-soft: #a7f3d0;
  --success-text: #065f46;
  --success-strong: #047857;

  --danger-bg: #fef2f2;
  --danger-bg-strong: #fee2e2;
  --danger-border: #ef4444;
  --danger-border-soft: #fecaca;
  --danger-text: #991b1b;
  --danger-strong: #b91c1c;

  --warning-bg: #fffbeb;
  --warning-bg-strong: #fef3c7;
  --warning-border: #fde68a;
  --warning-text: #92400e;
  --warning-strong: #b45309;

  /* Blue for text and icons; fills keep --color-iris-bolt */
  --accent-text: var(--color-iris-bolt);
  /* Text on gold/yellow surfaces stays dark in every theme */
  --on-gold: #282e3e;

  --info-bg: var(--color-lilac-wash);
  --info-border: #dbdfff;
  --info-text: var(--color-deep-indigo);

  /* AI / tutor surfaces use the lilac + violet pair */
  --ai-bg: var(--color-lilac-wash);
  --ai-border: #dbdfff;
  --ai-text: var(--color-iris-bolt);

  /* Aliases referenced throughout the templates */
  --navy: var(--color-iris-bolt);
  --border-color: var(--border-light);
  --border-medium: var(--color-mist-border);
  --text-secondary: var(--color-slate-veil);

  /* Shape (design.md: inputs/buttons 4px, cards 8px, feature cards 24px, pills 200px) */
  --radius-sm: 4px;
  --radius-md: 4px;
  --radius-lg: 8px;
  --radius-xl: 8px;
  --radius-card: 8px;
  --radius-feature: 24px;
  --radius-pill: 200px;

  /* Typography */
  --font-sans: 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-serif: var(--font-sans);
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Elevation (design.md: one soft shadow, never stacked) */
  --shadow-sm: rgba(40, 46, 62, 0.1) 0px 2px 4px 0px;
  --shadow-md: rgba(40, 46, 62, 0.1) 0px 4px 16px 0px;
  --shadow-lg: var(--shadow-md);
  --shadow-subtle: rgba(0, 0, 0, 0.3) 0px 0px 1px 0px inset;
}

/* Base Reset & Layout */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-body);
  background-color: var(--surface-bg);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

::placeholder {
  color: var(--color-fog-mist);
  opacity: 1;
}

a {
  color: var(--accent-text);
}

/* Global Top Navigation */
.app-navbar {
  background: var(--color-paper-white);
  color: var(--text-main);
  padding: 0 1.5rem;
  min-height: 56px;
  display: flex;
  align-items: center;
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 50;
}

.app-navbar-inner {
  width: 100%;
  max-width: var(--page-max-width);
  margin: 0 auto;
  padding: 0.5rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-badge {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--text-main);
}

.brand-avatar {
  width: 2.25rem;
  height: 2.25rem;
  flex-shrink: 0;
  background-color: var(--color-iris-bolt);
  border-radius: var(--radius-card);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
}

.brand-title {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-main);
  line-height: 1.2;
}

.brand-tagline {
  font-size: var(--text-caption);
  color: var(--text-secondary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  color: var(--text-main);
  text-decoration: none;
  font-size: var(--text-body-sm);
  font-weight: 500;
  padding: 0.45rem 0.7rem;
  border-radius: var(--radius-sm);
  transition: background-color 0.15s ease, color 0.15s ease;
  white-space: nowrap;
}

.nav-link:hover {
  background-color: var(--color-lilac-wash);
  color: var(--text-main);
}

.nav-link[aria-current="page"] {
  color: var(--accent-text);
  box-shadow: inset 0 -2px 0 var(--color-iris-bolt);
}

.nav-user {
  color: var(--text-secondary);
  font-size: var(--text-body-sm);
  font-weight: 600;
  padding: 0.45rem 0.7rem;
  white-space: nowrap;
}

.nav-link.nav-signout {
  color: var(--text-secondary);
}

.nav-link.nav-signout:hover {
  color: var(--text-main);
}

.nav-link.nav-cta {
  background: var(--color-iris-bolt);
  color: #ffffff;
  font-weight: 600;
  border-radius: var(--radius-pill);
  padding: 0.5rem 1.1rem;
  box-shadow: var(--shadow-sm);
}

.nav-link.nav-cta:hover {
  background: var(--color-accent-hover);
  color: #ffffff;
}

.nav-section {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-section-label {
  display: none;
  padding: 0 0.75rem 0.35rem;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.nav-link .icon {
  width: 1.15rem;
  height: 1.15rem;
}

.nav-toggle-close {
  display: none;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-open {
  display: none;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-close {
  display: inline-flex;
}

.nav-toggle-open,
.nav-toggle-close {
  align-items: center;
  justify-content: center;
}

.nav-link.admin-pill {
  border: 1px solid var(--color-iris-bolt);
  border-radius: var(--radius-pill);
  color: var(--accent-text);
  font-weight: 600;
}

.nav-link.admin-pill:hover,
.nav-link.admin-pill[aria-current="page"] {
  background-color: var(--color-lilac-wash);
  box-shadow: none;
}

/* Chat Layout & Container */
.chat-shell {
  max-width: 800px;
  margin: 1.5rem auto;
  height: calc(100vh - 56px - 3rem);
  height: calc(100dvh - 56px - 3rem);
  display: flex;
  flex-direction: column;
  background-color: var(--surface-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.chat-header {
  background: var(--surface-card);
  color: var(--text-main);
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-light);
}

.chat-header-title {
  font-weight: 600;
  font-size: var(--text-body);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: var(--text-caption);
  color: var(--text-secondary);
}

.chat-feed {
  position: relative; /* contains .sr-only labels so they don't extend the page */
  flex: 1;
  overflow-y: auto;
  padding: 1.25rem;
  background-color: var(--surface-bg);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  scroll-behavior: smooth;
}

/* Chat Bubbles */
.bubble-row {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  animation: fadeIn 0.2s ease-out;
}

.bubble-row.user {
  justify-content: flex-end;
}

.bubble-avatar {
  width: 2.25rem;
  height: 2.25rem;
  background-color: var(--color-lilac-wash);
  border: 2px solid var(--color-iris-bolt);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.bubble-content {
  max-width: 85%;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-card);
  font-size: var(--text-body-sm);
  line-height: 1.6;
}

.bubble-content.assistant {
  background-color: var(--surface-card);
  border: 1px solid var(--border-light);
  border-top-left-radius: 2px;
  color: var(--text-main);
}

.bubble-content.user {
  background-color: var(--color-iris-bolt);
  color: var(--text-inverse);
  border-top-right-radius: 2px;
}

/* Clarification Card & Chips */
.clarification-box {
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  border-left: 3px solid var(--color-iris-bolt);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-card);
  max-width: 90%;
}

.clarification-title {
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-main);
}

.chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip-btn {
  background: var(--surface-card);
  color: var(--accent-text);
  border: 1px solid var(--color-iris-bolt);
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-pill);
  font-family: inherit;
  font-size: var(--text-body-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.chip-btn:hover {
  background: var(--color-lilac-wash);
}

/* Academic Exam Question Card */
.exam-card {
  background-color: var(--surface-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  padding: var(--card-padding);
  margin-bottom: 1rem;
  transition: box-shadow 0.2s ease;
  position: relative;
}

.exam-card:hover {
  box-shadow: var(--shadow-md);
}

.exam-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px dashed var(--border-light);
}

.exam-badge-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.exam-badge {
  font-size: var(--text-caption);
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
}

.exam-badge.course {
  background-color: var(--color-lilac-wash);
  color: var(--accent-text);
}

.exam-badge.meta {
  background-color: var(--surface-subtle);
  color: var(--text-muted);
}

.marks-badge {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.scenario-context {
  background-color: var(--color-lilac-wash);
  border-left: 3px solid var(--color-iris-bolt);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.85rem;
  font-size: var(--text-body-sm);
  color: var(--color-deep-indigo);
}

.question-content {
  font-family: var(--font-sans);
  font-size: var(--text-body);
  line-height: 1.6;
  color: var(--color-ink-charcoal);
  margin-bottom: 1rem;
  white-space: pre-line;
}

.figure-frame {
  margin: 1rem 0;
  background: var(--color-lilac-wash);
  border: 1.5px solid var(--primary-100);
  border-radius: var(--radius-card);
  padding: 0.75rem;
  text-align: center;
}

.figure-img {
  max-height: 18rem;
  max-width: 100%;
  object-fit: contain;
  border-radius: var(--radius-sm);
  border: 1px solid var(--primary-100);
  background: var(--surface-card);
  display: block;
  margin: 0 auto;
  transition: transform 0.15s ease;
}

.figure-img:hover {
  transform: scale(1.01);
}

/* Interactive MCQ Choice List */
.mcq-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.mcq-choice {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-card);
  border: 1px solid var(--border-light);
  background-color: var(--surface-card);
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
  user-select: none;
}

.mcq-choice:hover {
  background-color: var(--color-chalk-canvas);
  border-color: var(--color-iris-bolt);
}

.mcq-letter {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.65rem;
  height: 1.65rem;
  border-radius: var(--radius-sm);
  background-color: var(--surface-subtle);
  font-size: var(--text-caption);
  font-weight: 600;
  color: var(--text-muted);
  flex-shrink: 0;
}

.mcq-text {
  font-size: var(--text-body-sm);
  color: var(--text-main);
  line-height: 1.45;
  flex: 1;
}

/* Selected & Evaluated MCQ states */
.mcq-choice.is-correct {
  background-color: var(--success-bg) !important;
  border-color: var(--success-border) !important;
  color: var(--success-text) !important;
}

.mcq-choice.is-correct .mcq-letter {
  background-color: var(--success-border);
  color: #ffffff;
}

.mcq-choice.is-incorrect {
  background-color: var(--danger-bg) !important;
  border-color: var(--danger-border) !important;
  color: var(--danger-text) !important;
}

.mcq-choice.is-incorrect .mcq-letter {
  background-color: var(--danger-border);
  color: #ffffff;
}

/* Solution / Action Footer */
.exam-card-footer {
  border-top: 1px solid var(--border-light);
  padding-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.action-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.btn-reveal {
  background: none;
  border: none;
  color: var(--accent-text);
  font-family: inherit;
  font-size: var(--text-body-sm);
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.25rem;
  border-radius: var(--radius-sm);
}

.btn-reveal:hover {
  text-decoration: underline;
}

.btn-solve {
  background-color: var(--color-lilac-wash);
  border: 1px solid transparent;
  color: var(--accent-text);
  font-family: inherit;
  font-size: var(--text-body-sm);
  font-weight: 600;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-pill);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.btn-solve:hover {
  background-color: var(--primary-100);
  border-color: var(--color-iris-bolt);
}

.solution-box {
  background-color: var(--color-lilac-wash);
  border: 1px solid var(--primary-100);
  border-radius: var(--radius-card);
  padding: 1rem;
  font-size: var(--text-body-sm);
  line-height: 1.6;
  color: var(--color-ink-charcoal);
  animation: fadeIn 0.2s ease-out;
}

.marking-scheme-box {
  background-color: var(--success-bg);
  border: 1px solid var(--success-border-soft);
  border-radius: var(--radius-card);
  padding: 0.85rem 1rem;
  font-size: 0.9rem;
  color: var(--success-text);
  animation: fadeIn 0.2s ease-out;
}

/* Chat Input Bar */
.chat-input-bar {
  padding: 0.85rem 1.25rem;
  background-color: var(--surface-card);
  border-top: 1px solid var(--border-light);
}

.chat-input-form {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.chat-input {
  flex: 1;
  padding: 0.7rem 1.15rem;
  background-color: var(--color-chalk-canvas);
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-family: inherit;
  font-size: var(--text-body-sm);
  color: var(--text-main);
  outline: none;
  transition: background-color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.chat-input:focus {
  background-color: var(--surface-card);
  border-color: var(--color-iris-bolt);
  box-shadow: 0 0 0 3px var(--color-accent-ring);
}

.chat-submit-btn {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  background: var(--color-iris-bolt);
  color: var(--text-inverse);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: background-color 0.15s ease;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.chat-submit-btn:hover {
  background: var(--color-accent-hover);
}

.chat-disclaimer {
  text-align: center;
  font-size: var(--text-caption);
  color: var(--text-secondary);
  margin-top: 0.4rem;
}

/* Animations & HTMX State Helpers */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.2s ease-out;
}

.htmx-indicator {
  display: none;
}
.htmx-request .htmx-indicator {
  display: inline-block;
}
.htmx-request.htmx-indicator {
  display: inline-block;
}

/* Print Optimization (for studying / saving paper PDFs) */
@media print {
  .app-navbar, .chat-input-bar, .btn-solve, .btn-reveal, .brand-avatar, .status-pill {
    display: none !important;
  }
  body.has-app-nav {
    padding-left: 0 !important;
  }
  body, .chat-shell, .chat-feed {
    background: #ffffff !important;
    border: none !important;
    box-shadow: none !important;
    height: auto !important;
    overflow: visible !important;
    max-width: 100% !important;
    padding: 0 !important;
    margin: 0 !important;
  }
  .exam-card {
    page-break-inside: avoid;
    break-inside: avoid;
    border: 1px solid var(--color-slate-veil) !important;
    margin-bottom: 2rem !important;
  }
  .question-content {
    font-size: 11pt !important;
  }
}


/* ==========================================================================
   Admin Workspace Styles (Clean, Structured, Desktop & Mobile Optimized)
   ========================================================================== */

.admin-container {
  max-width: 1200px;
  margin: 1.5rem auto;
  padding: 0 1rem;
}

.admin-page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.admin-page-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary-950);
}

.admin-card {
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  padding: var(--card-padding);
  margin-bottom: 1.5rem;
}

.admin-card-title {
  font-size: var(--text-subheading);
  font-weight: 600;
  color: var(--primary-900);
  margin-bottom: 1rem;
}

/* Form controls */
.form-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-end;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.form-label {
  font-size: var(--text-body-sm);
  font-weight: 600;
  color: var(--text-main);
}

.form-input, .form-select, .form-textarea {
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-size: var(--text-body-sm);
  font-family: inherit;
  color: var(--text-main);
  background: var(--surface-card);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--color-iris-bolt);
  box-shadow: 0 0 0 3px var(--color-accent-ring);
}

/* Filled pill button (design.md). Also styles legacy standalone .btn-primary usages. */
.btn-primary {
  background: var(--color-iris-bolt);
  color: var(--text-inverse);
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-pill);
  font-family: inherit;
  font-weight: 600;
  font-size: var(--text-body-sm);
  border: none;
  cursor: pointer;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  transition: background-color 0.15s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
}

.btn-secondary {
  background: var(--surface-subtle);
  color: var(--text-main);
  padding: 0.55rem 1rem;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-weight: 600;
  font-size: var(--text-body-sm);
  border: 1px solid var(--border-light);
  text-decoration: none;
  cursor: pointer;
}

.btn-secondary:hover {
  background: var(--surface-hover);
}

/* Exam Cards Grid */
.exam-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr));
  gap: 1.25rem;
}

.exam-item-wrap {
  position: relative;
}

.exam-item-wrap .exam-item-card {
  height: 100%;
  padding-left: 2.5rem;
}

.exam-item-wrap.is-locked .exam-item-card {
  padding-left: var(--card-padding);
}

.exam-item-select {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
  padding: var(--card-padding) 0.5rem 0.75rem 0.875rem;
  cursor: pointer;
}

.exam-item-select input {
  width: 1.05rem;
  height: 1.05rem;
}

.exam-item-card {
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  padding: var(--card-padding);
  text-decoration: none;
  color: inherit;
  display: block;
  transition: box-shadow 0.15s ease, border-color 0.15s ease;
}

.exam-item-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-iris-bolt);
}

.exam-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.exam-item-code {
  font-size: var(--text-subheading);
  font-weight: 700;
  color: var(--primary-950);
}

.status-badge {
  font-size: var(--text-caption);
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
  letter-spacing: 0.02em;
}

.status-badge.published {
  background: var(--success-bg-strong);
  color: var(--success-text);
  border: 1px solid var(--success-border-soft);
}

.status-badge.draft {
  background: var(--warning-bg-strong);
  color: var(--warning-text);
  border: 1px solid var(--warning-border);
}

/* Editor Layout (Two columns) */
.editor-layout {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: 1.5rem;
}

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

@media (max-width: 900px) {
  .editor-layout {
    grid-template-columns: minmax(0, 1fr);
  }
}

.sticky-panel {
  position: sticky;
  top: 5rem;
}


/* ==========================================================================
   Admin Question Card & Form Styling
   ========================================================================== */

.admin-q-card {
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  padding: var(--card-padding);
  margin-bottom: 1.25rem;
  transition: box-shadow 0.15s ease;
}

.admin-q-card:hover {
  border-color: var(--color-mist-border);
  box-shadow: var(--shadow-md);
}

.admin-q-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px dashed var(--border-light);
}

.admin-q-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.admin-q-meta a {
  color: var(--accent-text);
  text-decoration: underline;
}

.admin-q-content {
  font-family: var(--font-sans);
  font-size: var(--text-body);
  line-height: 1.6;
  color: var(--color-ink-charcoal);
  margin-bottom: 0.85rem;
  white-space: pre-line;
}

.admin-q-options {
  list-style: none;
  margin-bottom: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.admin-q-option-item {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-main);
}

.admin-q-option-letter {
  font-weight: 600;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  width: 1.25rem;
}

.admin-warning-box {
  background: var(--warning-bg);
  border: 1px solid var(--warning-border);
  color: var(--warning-text);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.admin-q-answer {
  background: var(--success-bg);
  border: 1px solid var(--success-border-soft);
  color: var(--success-text);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin-bottom: 0.75rem;
}

.admin-subquestions-tree {
  margin-left: 1.5rem;
  margin-top: 1rem;
  padding-left: 1rem;
  border-left: 2px solid var(--primary-100);
}

.admin-subquestions-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-text);
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.admin-card-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-light);
}

/* Ghost text link (design.md): no background, underline on hover only */
.btn-link {
  background: none;
  border: none;
  font-family: inherit;
  font-size: var(--text-body-sm);
  font-weight: 600;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--accent-text);
}

.btn-link.edit {
  color: var(--accent-text);
}

.btn-link.delete {
  color: var(--danger-strong);
}

.btn-link:hover {
  text-decoration: underline;
}

/* Edit Form In-Place */
.admin-edit-form {
  background: var(--color-lilac-wash);
  border: 1px solid var(--primary-100);
  border-radius: var(--radius-card);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Upload Dropzone */
.upload-dropzone {
  display: block;
  border: 2px dashed var(--color-mist-border);
  border-radius: var(--radius-card);
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  background: var(--surface-card);
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.upload-dropzone:hover {
  border-color: var(--color-iris-bolt);
  background: var(--color-lilac-wash);
}

.upload-icon {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  display: block;
}

.upload-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  display: block;
}

.upload-subtitle {
  font-size: 0.825rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
  display: block;
}

/* --- PAGINATION STYLES --- */
.pagination-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
  padding: 1.25rem 0.5rem;
  border-top: 1px solid var(--border-light);
}

.pagination-info {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.pagination-controls {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.pagination-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.25rem;
  height: 2.25rem;
  padding: 0 0.65rem;
  border-radius: var(--radius-sm);
  font-size: var(--text-body-sm);
  font-weight: 600;
  color: var(--text-main);
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.pagination-btn:hover:not(.disabled):not(.active) {
  background: var(--color-lilac-wash);
  border-color: var(--color-iris-bolt);
  color: var(--accent-text);
}

.pagination-btn.active {
  background: var(--color-lilac-wash);
  color: var(--accent-text);
  border-color: var(--color-iris-bolt);
}

.pagination-btn.disabled {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

.pagination-ellipsis {
  padding: 0 0.25rem;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.page-size-selector {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.825rem;
  color: var(--text-muted);
}

.page-size-link {
  text-decoration: none;
  padding: 0.2rem 0.45rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  border: 1px solid var(--border-light);
  background: var(--surface-card);
  color: var(--text-muted);
  font-size: 0.8rem;
}

.page-size-link.active {
  background: var(--color-lilac-wash);
  color: var(--accent-text);
  border-color: var(--color-iris-bolt);
}

/* ==========================================================================
   Toast Notification System (Accessible & Responsive)
   ========================================================================== */
.toast-container {
  position: fixed;
  top: 1.25rem;
  right: 1.25rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  pointer-events: none;
  max-width: calc(100vw - 2.5rem);
}

.toast {
  pointer-events: auto;
  min-width: 280px;
  max-width: 420px;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: var(--text-body-sm);
  line-height: 1.4;
  transition: opacity 0.25s ease, transform 0.25s ease;
  animation: slideInDown 0.25s ease-out;
}

.toast.fade-out {
  opacity: 0;
  transform: translateY(-8px);
}

.toast-error {
  background: var(--danger-bg);
  color: var(--danger-text);
  border: 1px solid var(--danger-border-soft);
}

.toast-warning {
  background: var(--warning-bg);
  color: var(--warning-text);
  border: 1px solid var(--warning-border);
}

.toast-success {
  background: var(--success-bg);
  color: var(--success-text);
  border: 1px solid var(--success-border-soft);
}

.toast-info {
  background: var(--surface-card);
  color: var(--color-deep-indigo);
  border: 1px solid var(--color-mist-border);
}

.toast-icon {
  font-size: 1.15rem;
  flex-shrink: 0;
}

.toast-message {
  flex: 1;
}

.toast-close {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.2rem;
  line-height: 1;
  color: currentColor;
  opacity: 0.6;
  padding: 0.2rem;
  margin-left: 0.35rem;
  transition: opacity 0.15s ease;
}

.toast-close:hover {
  opacity: 1;
}

@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==========================================================================
   Chat Typing Indicator
   ========================================================================== */
.typing-indicator-bubble {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--surface-card);
  border: 1px solid var(--border-light);
  border-top-left-radius: 2px;
  padding: 0.65rem 1rem;
  color: var(--text-muted);
  font-size: var(--text-body-sm);
}

.typing-dots {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  height: 0.85rem;
}

.typing-dots span {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--color-iris-bolt);
  animation: typingBounce 1.4s infinite ease-in-out both;
}

.typing-dots span:nth-child(1) {
  animation-delay: -0.32s;
}

.typing-dots span:nth-child(2) {
  animation-delay: -0.16s;
}

.typing-dots span:nth-child(3) {
  animation-delay: 0s;
}

@keyframes typingBounce {
  0%, 80%, 100% {
    transform: scale(0.4);
    opacity: 0.4;
  }
  40% {
    transform: scale(1.1);
    opacity: 1;
  }
}

/* ==========================================================================
   Error Bubbles & Retry Actions
   ========================================================================== */
.error-bubble {
  background: var(--danger-bg) !important;
  border: 1px solid var(--danger-border-soft) !important;
  color: var(--danger-text) !important;
}

.btn-retry-prompt,
.btn-retry {
  margin-top: 0.5rem;
  padding: 0.4rem 0.9rem;
  font-family: inherit;
  font-size: var(--text-body-sm);
  background: var(--surface-card);
  color: var(--accent-text);
  border: 1px solid var(--color-iris-bolt);
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: background-color 0.15s ease;
}

.btn-retry {
  margin-top: 0;
}

.btn-retry-prompt:hover,
.btn-retry:hover {
  background: var(--color-lilac-wash);
}

.solution-error-box {
  margin-top: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-card);
  background: var(--warning-bg);
  border: 1px solid var(--warning-border);
  color: var(--warning-text);
}

/* ==========================================================================
   Voice Note Recording Button & Pulse
   ========================================================================== */
.chat-voice-btn {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  background: var(--surface-card);
  color: var(--accent-text);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
  flex-shrink: 0;
}

.chat-voice-btn:hover {
  background: var(--color-lilac-wash);
  border-color: var(--color-iris-bolt);
}

.chat-voice-btn.recording {
  background: var(--danger-border);
  color: #ffffff;
  border-color: var(--danger-strong);
  animation: pulseRecording 1.2s infinite ease-in-out;
}

@keyframes pulseRecording {
  0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.5); }
  50% { transform: scale(1.08); box-shadow: 0 0 0 8px rgba(239, 68, 68, 0); }
  100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

/* ==========================================================================
   Mobile Responsive Navigation & Responsive Breakpoints
   ========================================================================== */
.nav-toggle {
  display: none;
  background: var(--surface-card);
  border: 1px solid var(--color-mist-border);
  color: var(--text-main);
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-sm);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: background-color 0.15s ease;
  user-select: none;
}

.nav-toggle:hover {
  background: var(--color-lilac-wash);
}

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

@media (max-width: 1180px) {
  .brand-tagline {
    display: none;
  }
}

/* Navigation Drawer Breakpoint (<= 1024px) */
@media (max-width: 1024px) {
  .app-navbar-inner {
    flex-wrap: wrap;
    position: relative;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0.35rem;
    margin-top: 0.5rem;
    padding: 0.75rem 0 0.5rem;
    border-top: 1px solid var(--color-mist-border);
    max-height: calc(100dvh - 5rem);
    overflow-y: auto;
  }

  .nav-links.is-open {
    display: flex !important;
    animation: navSlideDown 0.2s ease-out;
  }

  .nav-link,
  .nav-user {
    min-height: 44px; /* Accessible touch target */
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.65rem 1rem;
    font-size: var(--text-body);
    border-radius: var(--radius-sm);
  }

  .nav-link:hover {
    background: var(--color-lilac-wash);
  }

  .nav-link[aria-current="page"] {
    background: var(--color-lilac-wash);
    box-shadow: none;
  }

  .nav-link.nav-cta,
  .nav-link.admin-pill {
    justify-content: center;
    border-radius: var(--radius-pill);
  }

  .nav-account {
    margin-top: 0.35rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--color-mist-border);
  }
}

/* Left sidebar navigation (> 1024px). Below that, the top bar + drawer above is used. */
@media (min-width: 1025px) {
  body.has-app-nav {
    padding-left: var(--sidebar-width);
  }

  .app-navbar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    width: var(--sidebar-width);
    min-height: 0;
    padding: 0;
    display: block;
    background: var(--color-paper-white);
    border-right: 1px solid var(--color-mist-border);
    box-shadow: none;
    overflow-y: auto;
  }

  .app-navbar-inner {
    height: 100%;
    max-width: none;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: var(--spacing-24);
    padding: var(--spacing-16) var(--spacing-16) var(--spacing-24);
  }

  .brand-badge {
    gap: 0.65rem;
    padding: 0.25rem 0.75rem var(--spacing-16);
    border-bottom: 1px solid var(--color-mist-border);
  }

  .brand-tagline {
    display: none;
  }

  .nav-links {
    flex: 1;
    flex-direction: column;
    align-items: stretch;
    justify-content: space-between;
    gap: var(--spacing-24);
  }

  .nav-section-label {
    display: block;
  }

  .nav-section {
    gap: 6px;
  }

  .nav-section-label {
    padding-bottom: 0.6rem;
  }

  .nav-link,
  .nav-user {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    min-height: 48px;
    padding: 0.65rem 0.9rem;
    border-radius: var(--radius-card);
    font-size: 0.9375rem;
    color: var(--color-deep-indigo);
    white-space: normal;
  }

  .nav-link .icon {
    width: 20px;
    height: 20px;
    color: var(--text-secondary);
  }

  .nav-link:hover {
    background: var(--color-chalk-canvas);
    color: var(--text-main);
  }

  .nav-link:hover .icon {
    color: var(--text-main);
  }

  .nav-link[aria-current="page"],
  .nav-link[aria-current="page"]:hover {
    background: var(--color-lilac-wash);
    color: var(--accent-text);
    box-shadow: none;
  }

  .nav-link[aria-current="page"] .icon {
    color: var(--accent-text);
  }

  .nav-user {
    color: var(--text-secondary);
    font-weight: 400;
  }

  .nav-account {
    gap: 2px;
  }

  .nav-link.nav-cta,
  .nav-link.admin-pill {
    justify-content: center;
    margin-top: 0.35rem;
    border-radius: var(--radius-pill);
    font-weight: 600;
  }

  .nav-link.nav-cta,
  .nav-link.nav-cta:hover {
    color: #ffffff;
  }

  .nav-link.admin-pill,
  .nav-link.admin-pill .icon {
    color: var(--accent-text);
  }

  .nav-link.admin-pill:hover,
  .nav-link.admin-pill[aria-current="page"] {
    background: var(--color-lilac-wash);
  }

  .chat-shell {
    height: calc(100vh - 3rem);
    height: calc(100dvh - 3rem);
  }

  .sticky-panel {
    top: 1.5rem;
  }
}

/* Tablet & Mobile Breakpoint (<= 880px) */
@media (max-width: 880px) {
  /* Chat Shell on Mobile */
  .chat-shell {
    margin: 0;
    border-radius: 0;
    border-left: none;
    border-right: none;
    border-top: none;
    height: calc(100dvh - 56px);
  }

  .chat-input {
    font-size: 16px; /* Prevents iOS auto-zoom on input focus */
  }

  .bubble-content {
    max-width: 92%;
    padding: 0.75rem 0.95rem;
  }

  /* Exam Card mobile adjustments */
  .exam-card {
    padding: 1rem;
  }

  .question-content {
    font-size: 0.98rem;
  }

  .admin-page-header {
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
  }
}

/* Small Screen Breakpoint (<= 640px) */
@media (max-width: 640px) {
  .rating-buttons-grid {
    grid-template-columns: repeat(2, 1fr) !important;
  }

  .exam-hall-header {
    flex-wrap: wrap;
    gap: 0.5rem 0.75rem;
    padding: 0.5rem 1rem !important;
  }

  /* The sticky bar took about 190px of a phone's screen: course, clock and progress are enough */
  .exam-hall-avatar,
  .exam-hall-subtitle {
    display: none;
  }

  .exam-hall-heading {
    font-size: 1rem;
  }

  .exam-hall-layout {
    grid-template-columns: 1fr !important;
    margin: 1rem auto !important;
    padding: 0 0.75rem !important;
  }

  .exam-hall-sidebar {
    order: -1;
    position: static !important;
    margin-bottom: 1.5rem;
  }

  .flashcard-inner-card {
    padding: 1.25rem !important;
  }
}

/* Compact Phone Breakpoint (<= 480px) */
@media (max-width: 480px) {
  .app-navbar {
    padding: 0 1rem;
  }

  .brand-title {
    font-size: 1.05rem;
  }

  .brand-tagline {
    display: none; /* Hide tagline on compact mobile for clean header */
  }

  .brand-avatar {
    width: 2.25rem;
    height: 2.25rem;
    font-size: 1.15rem;
  }

  .chat-header {
    padding: 0.5rem 1rem;
  }

  /* The site bar above already shows Uncle Kwaku: keep the thread's title and New Chat only */
  .chat-header .brand-avatar,
  .chat-header .status-pill {
    display: none;
  }

  .chat-input-bar {
    padding: 0.65rem 0.85rem;
  }

  .chat-submit-btn, .chat-voice-btn {
    width: 2.5rem;
    height: 2.5rem;
  }
}

/* ==========================================================================
   Shared UI Primitives
   Reusable building blocks for student and admin pages. Prefer these over
   inline styles so spacing, colour and interaction states stay consistent.
   ========================================================================== */

/* --- Icons (Lucide line icons via components/icons.html) --- */
.icon {
  display: inline-block;
  width: 1.1em;
  height: 1.1em;
  flex-shrink: 0;
  vertical-align: -0.18em;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.empty-state-icon,
.status-card-icon,
.flashcard-panel-icon,
.upload-icon,
.related-card-icon,
.material-card-icon,
.material-hero-icon,
.profile-icon,
.material-chat-avatar,
.exam-hall-avatar {
  color: var(--accent-text);
  line-height: 1;
}

.empty-state-icon .icon,
.status-card-icon .icon,
.flashcard-panel-icon .icon {
  stroke-width: 1.5;
}

.hero-watermark {
  color: var(--accent-text);
}

.hero-watermark .icon {
  stroke-width: 1.25;
}

.brand-avatar {
  color: #ffffff;
}

.bubble-avatar {
  color: var(--accent-text);
}

.icon-close .icon,
.alert-dismiss .icon,
.toast-close .icon {
  width: 1.1rem;
  height: 1.1rem;
}

/* Recording dot and recall-rating markers read as solid shapes */
.voice-banner-status .icon,
.rating-btn .icon {
  fill: currentColor;
}

.rating-btn .icon {
  width: 0.8em;
  height: 0.8em;
}

/* --- Accessibility helpers --- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 10000;
  background: var(--color-iris-bolt);
  color: #ffffff;
  font-weight: 600;
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius-pill);
  text-decoration: none;
  transition: top 0.15s ease;
}

.skip-link:focus {
  top: 0.75rem;
}

:where(a, button, summary, select, [role="button"], [role="tab"], [tabindex], input[type="checkbox"], input[type="radio"]):focus-visible {
  outline: 2px solid var(--color-iris-bolt);
  outline-offset: 2px;
}

main:focus {
  outline: none;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* HTMX indicators that need flex layout (e.g. chat typing bubble) */
.bubble-row.htmx-indicator.htmx-request,
.bubble-row.htmx-indicator.is-active {
  display: flex;
}

/* --- Page layout --- */
.page {
  max-width: var(--page-max-width);
  margin: var(--spacing-40) auto var(--spacing-64);
  padding: 0 var(--spacing-24);
}

.page-lg { max-width: 1040px; }
.page-md { max-width: 900px; }
.page-sm { max-width: 640px; }
.page-xs { max-width: 460px; }

.page-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--spacing-16);
  margin-bottom: var(--spacing-32);
}

.page-title {
  font-size: clamp(var(--text-heading-sm), 1.2rem + 1.4vw, var(--text-heading));
  font-weight: 600;
  color: var(--text-main);
  letter-spacing: -0.01em;
  line-height: 1.28;
}

.page-subtitle {
  color: var(--text-muted);
  font-size: var(--text-body);
  line-height: 1.5;
  margin-top: var(--spacing-8);
  max-width: 65ch;
}

.page-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--text-body-sm);
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.breadcrumb a {
  color: var(--accent-text);
  font-weight: 600;
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

/* --- Hero banner: design.md "Promotional Section Panel" (lilac wash, ink copy) --- */
.hero,
.hero-indigo {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-feature);
  padding: clamp(var(--spacing-24), 4vw, var(--spacing-48));
  margin-bottom: var(--spacing-40);
  color: var(--text-main);
  background: var(--color-lilac-wash);
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-pill);
  background: var(--surface-card);
  border: 1px solid var(--primary-100);
  color: var(--accent-text);
  font-size: var(--text-caption);
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.hero-title {
  font-size: clamp(var(--text-heading-sm), 1.2rem + 1.6vw, var(--text-heading));
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.28;
  color: var(--text-main);
}

.hero-text {
  margin-top: var(--spacing-8);
  max-width: 62ch;
  font-size: var(--text-body);
  line-height: 1.6;
  color: var(--text-secondary);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-8);
  margin-top: var(--spacing-24);
}

/* --- Sections --- */
.section {
  margin-bottom: clamp(var(--spacing-40), 6vw, var(--section-gap));
}

.section-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: var(--spacing-16);
}

.section-title {
  font-size: var(--text-subheading);
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-main);
}

.section-subtitle {
  font-size: var(--text-body-sm);
  color: var(--text-muted);
  margin-top: 0.2rem;
}

/* --- Layout helpers --- */
.grid-auto {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, var(--grid-min, 280px)), 1fr));
}

.grid-stats {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 170px), 1fr));
}

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.spread {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.stack-lg {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.min-w-0 { min-width: 0; }
.w-full { width: 100%; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

.text-ink { color: var(--text-main); }
.text-accent { color: var(--accent-text); }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-success { color: var(--success-strong); }
.text-danger { color: var(--danger-strong); }
.text-warning { color: var(--warning-strong); }
.text-ai { color: var(--ai-text); }
.text-sm { font-size: var(--text-body-sm); }
.text-xs { font-size: var(--text-caption); }
.font-bold { font-weight: 600; }
.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* --- Cards --- */
.card {
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  padding: var(--card-padding);
}

.card-lg {
  padding: clamp(var(--spacing-24), 3vw, var(--spacing-32));
}

.card-flush {
  padding: 0;
  overflow: hidden;
}

.card-title {
  font-size: var(--text-subheading);
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-main);
  margin-bottom: 0.75rem;
}

.card-interactive {
  display: block;
  color: inherit;
  text-decoration: none;
  transition: box-shadow 0.15s ease, border-color 0.15s ease;
}

.card-interactive:hover,
.card-interactive:focus-within {
  box-shadow: var(--shadow-md);
  border-color: var(--color-iris-bolt);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 2.5rem;
  padding: 0.55rem 1.25rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: var(--text-body-sm);
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
}

/* Filled pill (design.md primary) */
.btn.btn-primary,
.btn-success {
  background: var(--color-iris-bolt);
  color: var(--text-inverse);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
}

.btn.btn-primary:hover:not(:disabled),
.btn-success:hover:not(:disabled) {
  background: var(--color-accent-hover);
}

/* Pro upgrade pill — the only place gold appears on a control */
.btn-gold {
  background: var(--accent-gold);
  color: var(--color-ink-charcoal);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
}

.btn-gold:hover:not(:disabled) {
  background: #fbbf24;
}

/* Ghost outlined pill (design.md secondary CTA) */
.btn-outline {
  background: transparent;
  border-color: var(--color-iris-bolt);
  color: var(--accent-text);
  border-radius: var(--radius-pill);
}

.btn-outline:hover:not(:disabled) {
  background: var(--color-lilac-wash);
}

/* Utility button (4px) */
.btn-subtle {
  background: var(--color-chalk-canvas);
  border-color: var(--border-light);
  color: var(--text-main);
}

.btn-subtle:hover:not(:disabled) {
  background: var(--color-lilac-wash);
  border-color: var(--primary-100);
}

/* Ghost text link */
.btn-ghost {
  background: transparent;
  color: var(--accent-text);
  padding-left: 0.5rem;
  padding-right: 0.5rem;
}

.btn-ghost:hover:not(:disabled) {
  text-decoration: underline;
}

.btn-danger {
  background: var(--danger-strong);
  color: #ffffff;
}

.btn-danger:hover:not(:disabled) {
  background: var(--danger-text);
}

.btn-danger-ghost {
  background: transparent;
  border-color: var(--border-light);
  color: var(--danger-strong);
}

.btn-danger-ghost:hover:not(:disabled) {
  background: var(--danger-bg);
  border-color: var(--danger-border-soft);
}

/* Tutor / AI actions: lilac tint pill */
.btn-ai {
  background: var(--color-lilac-wash);
  border-color: transparent;
  color: var(--accent-text);
  border-radius: var(--radius-pill);
}

.btn-ai:hover:not(:disabled) {
  background: var(--primary-100);
  border-color: var(--color-iris-bolt);
}

/* Formerly for dark heroes; heroes are light now, so render as outlined pill */
.btn-on-dark {
  background: var(--surface-card);
  border-color: var(--color-iris-bolt);
  color: var(--accent-text);
  border-radius: var(--radius-pill);
}

.btn-on-dark:hover:not(:disabled) {
  background: var(--color-lilac-wash);
}

.btn-whatsapp {
  background: #25d366;
  color: #052e16;
}

.btn-whatsapp:hover:not(:disabled) {
  background: #1ebe5b;
}

.btn-telegram {
  background: #1b77b0;
  color: #ffffff;
}

.btn-telegram:hover:not(:disabled) {
  background: #155f8d;
}

.btn-sm {
  min-height: 2rem;
  padding: 0.35rem 0.9rem;
  font-size: var(--text-caption);
}

.btn-lg {
  min-height: 3rem;
  padding: 0.75rem 1.6rem;
  font-size: var(--text-body);
}

.btn-block {
  display: flex;
  width: 100%;
}

.btn-icon {
  min-height: 0;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  flex-shrink: 0;
}

.btn .htmx-indicator {
  font-weight: 600;
}

/* --- Badges --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.6rem;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-size: var(--text-caption);
  font-weight: 600;
  line-height: 1.4;
  white-space: nowrap;
  background: var(--color-chalk-canvas);
  color: var(--text-muted);
}

.badge-square { border-radius: var(--radius-sm); }
/* design.md "Term Count Badge" */
.badge-neutral { background: var(--color-chalk-canvas); color: var(--text-muted); border-color: transparent; }
.badge-primary { background: var(--color-lilac-wash); color: var(--accent-text); border-color: transparent; }
.badge-success { background: var(--success-bg); color: var(--success-text); border-color: var(--success-border-soft); }
.badge-warning { background: var(--warning-bg); color: var(--warning-text); border-color: var(--warning-border); }
.badge-danger { background: var(--danger-bg); color: var(--danger-text); border-color: var(--danger-border-soft); }
.badge-ai { background: var(--ai-bg); color: var(--ai-text); border-color: var(--ai-border); }
.badge-gold { background: var(--accent-gold); color: var(--primary-950); }
.badge-on-dark { background: var(--surface-card); color: var(--text-main); border-color: var(--color-mist-border); }

/* --- Alerts & flash messages --- */
.alert {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  padding: 0.85rem 1rem;
  border: 1px solid;
  border-radius: var(--radius-card);
  font-size: var(--text-body-sm);
  line-height: 1.5;
}

.alert-icon {
  flex-shrink: 0;
  line-height: 1.4;
}

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

.alert-title {
  display: block;
  font-weight: 600;
  margin-bottom: 0.15rem;
}

.alert-dismiss {
  background: none;
  border: none;
  color: currentColor;
  opacity: 0.6;
  font-size: 1.15rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.1rem 0.3rem;
  border-radius: var(--radius-sm);
}

.alert-dismiss:hover {
  opacity: 1;
}

.alert-success { background: var(--success-bg); border-color: var(--success-border-soft); color: var(--success-text); }
.alert-danger,
.alert-error { background: var(--danger-bg); border-color: var(--danger-border-soft); color: var(--danger-text); }
.alert-warning { background: var(--warning-bg); border-color: var(--warning-border); color: var(--warning-text); }
.alert-info { background: var(--info-bg); border-color: var(--info-border); color: var(--info-text); }

.flash-stack {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-width: var(--page-max-width);
  margin: 1rem auto 0;
  padding: 0 var(--spacing-24);
}

/* --- Callouts (mentor verdicts): tinted highlight with violet rule --- */
.callout {
  padding: 1rem 1.15rem;
  border-radius: var(--radius-card);
  border-left: 3px solid var(--color-iris-bolt);
  background: var(--color-lilac-wash);
  color: var(--color-deep-indigo);
  font-size: var(--text-body-sm);
  line-height: 1.6;
}

.callout-title {
  display: block;
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: var(--text-main);
}

/* --- Stat tiles --- */
.stat-tile {
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  padding: var(--spacing-16) var(--spacing-24);
}

.stat-label {
  font-size: var(--text-caption);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-secondary);
}

.stat-value {
  font-size: var(--text-heading-sm);
  font-weight: 600;
  line-height: 1.3;
  margin-top: 0.25rem;
  color: var(--text-main);
  font-variant-numeric: tabular-nums;
}

.stat-hint {
  font-size: var(--text-caption);
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

/* --- Empty states --- */
.empty-state {
  text-align: center;
  padding: var(--spacing-40) var(--spacing-24);
  border: 1px dashed var(--border-medium);
  border-radius: var(--radius-card);
  background: var(--surface-card);
  color: var(--text-muted);
}

.empty-state-icon {
  display: block;
  font-size: 2.25rem;
  margin-bottom: 0.5rem;
}

.empty-state-title {
  font-size: var(--text-body);
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.35rem;
}

.empty-state-text {
  font-size: var(--text-body-sm);
  max-width: 48ch;
  margin: 0 auto;
}

.empty-state-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.error-page {
  max-width: 560px;
  margin: 4rem auto;
  padding: 0 1rem;
}

.error-page .empty-state {
  border-style: solid;
  border-color: var(--border-light);
  box-shadow: var(--shadow-md);
  padding: 2.5rem 1.75rem;
}

/* --- Progress bars --- */
.progress {
  height: 0.5rem;
  background: var(--surface-subtle);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  border-radius: inherit;
  background: var(--color-iris-bolt);
  transition: width 0.3s ease;
}

.progress-bar.is-success { background: var(--success-border); }
.progress-bar.is-warning { background: #f59e0b; }
.progress-bar.is-danger { background: var(--danger-border); }

/* --- Tables --- */
.table-wrap {
  position: relative;
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  background: var(--surface-card);
}

.data-table,
.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-body-sm);
}

.data-table th,
.admin-table th {
  text-align: left;
  padding: 0.7rem 0.85rem;
  background: var(--color-chalk-canvas);
  color: var(--text-muted);
  font-size: var(--text-caption);
  font-weight: 600;
  letter-spacing: 0.02em;
  border-bottom: 1px solid var(--border-light);
  white-space: nowrap;
}

.data-table td,
.admin-table td {
  padding: 0.7rem 0.85rem;
  border-bottom: 1px solid var(--border-light);
  vertical-align: middle;
}

.data-table tbody tr:last-child td,
.admin-table tbody tr:last-child td {
  border-bottom: none;
}

.data-table tbody tr:hover,
.admin-table tbody tr:hover {
  background: var(--color-chalk-canvas);
}

.table-caption {
  text-align: left;
  padding: 0.75rem 0.85rem 0;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* --- Tabs & filter chips --- */
.tabs {
  display: flex;
  gap: 0.35rem;
  padding: 0.3rem;
  overflow-x: auto;
  background: var(--surface-subtle);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  scrollbar-width: thin;
}

.tab {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-muted);
  font-family: inherit;
  font-size: var(--text-body-sm);
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.tab:hover {
  color: var(--text-main);
  background: color-mix(in srgb, var(--surface-card) 70%, transparent);
}

.tab[aria-selected="true"] {
  background: var(--surface-card);
  color: var(--accent-text);
  box-shadow: var(--shadow-sm);
}

.chip-filter {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.9rem;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-pill);
  background: var(--surface-card);
  color: var(--text-main);
  font-family: inherit;
  font-size: var(--text-body-sm);
  font-weight: 400;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.chip-filter:hover {
  border-color: var(--color-iris-bolt);
  color: var(--accent-text);
}

.chip-filter[aria-pressed="true"],
.chip-filter[aria-current="page"],
.chip-filter.is-active {
  background: var(--color-lilac-wash);
  border-color: var(--color-iris-bolt);
  color: var(--accent-text);
  font-weight: 600;
}

/* --- Admin sub-navigation --- */
.subnav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: var(--spacing-32);
}

.subnav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-pill);
  background: var(--surface-card);
  color: var(--text-main);
  font-size: var(--text-body-sm);
  font-weight: 400;
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.subnav-link:hover {
  border-color: var(--color-iris-bolt);
  color: var(--accent-text);
}

.subnav-link[aria-current="page"] {
  background: var(--color-lilac-wash);
  border-color: var(--color-iris-bolt);
  color: var(--accent-text);
  font-weight: 600;
}

/* --- Modal dialogs --- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: clamp(0.75rem, 6vh, 4rem) 1rem;
  overflow-y: auto;
  background: rgba(40, 46, 62, 0.4);
}

.modal {
  width: 100%;
  max-width: 560px;
  margin: auto 0;
  background: var(--surface-card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-md);
  animation: fadeIn 0.2s ease-out;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  border-bottom: 1px solid var(--border-light);
}

.modal-title {
  font-size: var(--text-subheading);
  font-weight: 600;
  color: var(--text-main);
}

.modal-body {
  padding: 1.25rem;
}

.modal-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.5rem;
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border-light);
}

.icon-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  flex-shrink: 0;
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-muted);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
}

.icon-close:hover {
  background: var(--surface-subtle);
  color: var(--text-main);
}

/* --- Forms --- */
.form-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
}

.form-stack {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-hint {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.form-required {
  color: var(--danger-strong);
}

.form-input,
.form-select {
  min-height: 2.5rem;
}

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
  background: var(--surface-subtle);
  cursor: not-allowed;
}

.form-input[type="file"] {
  padding: 0.4rem;
}

.form-check {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  cursor: pointer;
}

.form-check input {
  width: 1.1rem;
  height: 1.1rem;
  accent-color: var(--primary-600);
}

.visually-hidden-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.upload-dropzone:focus-within {
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.upload-dropzone {
  position: relative;
}

/* --- Interactive MCQ options outside the chat question card --- */
.mcq-choice[role="button"]:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

.mcq-choice.is-selected {
  border-color: var(--primary-500);
  background: var(--primary-50);
}

/* --- Spinner --- */
.spinner {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  vertical-align: -0.15em;
}

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

.pre-wrap {
  white-space: pre-wrap;
}

.pre-line {
  white-space: pre-line;
}

/* ==========================================================================
   Chat & Tutor Components
   ========================================================================== */
.chat-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  width: 100%;
}

.chat-header-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.chat-header-brand .brand-avatar {
  width: 2.25rem;
  height: 2.25rem;
  font-size: 1.15rem;
  flex-shrink: 0;
}

.chat-header-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chat-welcome-title {
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.chat-suggestions {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.chat-suggestions ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.45rem;
}

.chat-suggestion {
  background: var(--primary-50);
  border: 1px solid var(--primary-100);
  color: var(--primary-800);
  border-radius: var(--radius-pill);
  padding: 0.3rem 0.75rem;
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.chat-suggestion:hover {
  background: var(--primary-100);
  border-color: var(--primary-500);
}

.voice-banner {
  display: none;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  padding: 0.5rem 0.85rem;
  background: var(--danger-bg);
  border: 1.5px solid var(--danger-border-soft);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
}

.voice-banner.is-active {
  display: flex;
}

.voice-banner-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--danger-text);
  font-weight: 600;
}

.chat-error-body {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
}

.chat-error-icon {
  font-size: 1.25rem;
  line-height: 1;
}

.chat-error-text {
  font-weight: 500;
  line-height: 1.45;
}

.chip-btn-course {
  background: var(--color-lilac-wash);
}

.search-results {
  display: flex;
  flex-direction: column;
}

.search-results-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.85rem;
  padding: 0 0.25rem;
}

.search-results-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  white-space: nowrap;
}

.search-results-rule {
  flex: 1;
  height: 1px;
  background: var(--border-light);
}

.search-results-note {
  font-size: var(--text-caption);
  color: var(--text-secondary);
  margin: 0 0 0.75rem;
}

.search-results-note a { color: var(--accent-text); font-weight: 600; }

.search-results-end {
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

/* Question card extras */
button.mcq-choice {
  width: 100%;
  font-family: inherit;
  font-size: inherit;
  text-align: left;
  color: inherit;
}

.mcq-verdict {
  font-size: 0.8rem;
  font-weight: 700;
  white-space: nowrap;
}

.exam-badge-type {
  text-transform: capitalize;
}

.share-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-pill);
  background: var(--color-lilac-wash);
  color: var(--accent-text);
  font-size: var(--text-caption);
  font-weight: 600;
  text-decoration: none;
}

.share-chip:hover {
  background: var(--primary-100);
}

.question-id {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.scenario-context-label {
  display: block;
  font-style: normal;
  font-size: 0.775rem;
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}

.figure-caption {
  display: block;
  font-size: 0.75rem;
  color: var(--accent-text);
  margin-top: 0.35rem;
  font-weight: 500;
}

.no-answer-key {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-style: italic;
}

.btn-grade {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-iris-bolt);
  background: var(--surface-card);
  color: var(--accent-text);
  font-family: inherit;
  font-size: var(--text-body-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.btn-grade:hover {
  background: var(--color-lilac-wash);
}

.btn-solve:disabled,
.btn-retry:disabled {
  opacity: 0.7;
  cursor: progress;
}

.grader-drawer {
  margin-top: 0.5rem;
  padding: 1.15rem;
  background: var(--color-chalk-canvas);
  border: 1px solid var(--color-mist-border);
  border-radius: var(--radius-lg);
}

.grader-drawer-title {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--navy);
}

.marking-scheme-label {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}

/* AI solution */
.solution-box-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--ai-border);
}

.solution-box-title {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--ai-text);
}

.solution-box-tag {
  font-size: 0.75rem;
  color: var(--accent-text);
}

.solution-box-body {
  color: var(--color-ink-charcoal);
}

.self-mark {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
}

/* Mock lobby: a course's year picker beside its question count */
.mock-paper-pick {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  white-space: normal;
}
.mock-paper-select {
  width: auto;
  padding-block: 0.2rem;
  font-size: var(--text-body-sm);
}

/* Walkthroughs and tutor replies rendered from Markdown (services/rich_text.py) */
.rich > :first-child { margin-top: 0; }
.rich > :last-child { margin-bottom: 0; }
.rich p,
.rich ul,
.rich ol { margin: 0 0 0.65em; }
.rich ul,
.rich ol { padding-left: 1.3em; }
.rich li + li { margin-top: 0.2em; }
.rich h3,
.rich h4,
.rich h5,
.rich h6 { font-size: 1em; font-weight: 700; margin: 1em 0 0.4em; }
.rich hr { border: 0; border-top: 1px solid var(--border-light); margin: 0.9em 0; }
.rich code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--surface-subtle);
  padding: 0.05em 0.3em;
  border-radius: 4px;
}
.rich .katex-display { overflow-x: auto; overflow-y: hidden; }
.rich-table { overflow-x: auto; margin: 0 0 0.65em; }
.rich-table table { border-collapse: collapse; font-size: 0.95em; }
.rich-table th,
.rich-table td {
  border: 1px solid var(--border-light);
  padding: 0.35em 0.6em;
  text-align: left;
  vertical-align: top;
}
.rich-table th { font-weight: 700; }

.solution-box-footnote {
  margin-top: 0.65rem;
  font-size: 0.75rem;
  color: var(--accent-text);
  text-align: right;
  font-style: italic;
}

/* Upsell / gated feature boxes */
.upsell-box {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  margin-top: 1rem;
  padding: var(--spacing-24);
  background: var(--color-lilac-wash);
  border: 1px solid var(--primary-100);
  border-radius: var(--radius-card);
  color: var(--color-deep-indigo);
}

.upsell-box-dashed {
  border-style: dashed;
  border-color: var(--color-iris-bolt);
}

.upsell-box-icon {
  font-size: 1.6rem;
  line-height: 1;
}

.upsell-box-body {
  flex: 1;
  min-width: 0;
}

.upsell-box-title {
  font-size: var(--text-body);
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.35rem;
}

.upsell-box-text {
  font-size: 0.9rem;
  line-height: 1.55;
  margin-bottom: 1rem;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.875rem;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.45rem;
  line-height: 1.45;
}

.feature-list li::before {
  content: "✓";
  color: var(--success-strong);
  font-weight: 600;
  flex-shrink: 0;
}

.feature-list-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
}

/* Grade report */
.grade-report-card {
  margin-top: 1.25rem;
}

.grade-report-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-light);
}

.grade-score-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.6rem;
  margin-top: 0.25rem;
}

.grade-score {
  font-size: 2.25rem;
  font-weight: 600;
  line-height: 1;
}

.grade-score-max {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.grade-letter {
  font-size: 0.9rem;
}

.grade-mastery {
  min-width: 140px;
  flex: 0 1 220px;
}

.grade-mastery-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-deep-indigo);
  margin-bottom: 0.35rem;
}

.grade-breakdown {
  display: grid;
  gap: 1rem;
  margin-bottom: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
}

.grade-breakdown-panel {
  border-radius: var(--radius-card);
  padding: 1rem;
  border: 1px solid;
  font-size: 0.85rem;
}

.grade-breakdown-panel ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  line-height: 1.45;
}

.grade-breakdown-panel.is-success {
  background: var(--success-bg);
  border-color: var(--success-border-soft);
  color: var(--success-text);
}

.grade-breakdown-panel.is-warning {
  background: var(--warning-bg);
  border-color: var(--warning-border);
  color: var(--warning-text);
}

.grade-breakdown-title {
  font-weight: 700;
  margin-bottom: 0.6rem;
}

.disclosure {
  background: var(--color-chalk-canvas);
  border: 1px solid var(--color-mist-border);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  font-size: 0.88rem;
}

.disclosure summary {
  font-weight: 700;
  color: var(--navy);
  cursor: pointer;
}

.disclosure-body {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--color-mist-border);
  line-height: 1.55;
}

/* ==========================================================================
   Account, Pricing & Payment Pages
   ========================================================================== */
.auth-card {
  padding: clamp(1.35rem, 4vw, 2rem);
  box-shadow: var(--shadow-lg);
}

.auth-header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.auth-avatar {
  width: 3.5rem;
  height: 3.5rem;
  font-size: 1.75rem;
  margin: 0 auto 0.75rem;
}

.auth-title {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--primary-950);
}

.auth-subtitle {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.auth-footer {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-light);
  text-align: center;
  font-size: 0.875rem;
}

.auth-footer a {
  color: var(--accent-text);
  font-weight: 600;
  margin-left: 0.35rem;
}

.thread-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.thread-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  padding: 1.1rem 1.25rem;
}

.thread-item > .min-w-0 {
  flex: 1 1 260px;
}

.thread-title {
  display: block;
  font-weight: 700;
  font-size: 1rem;
  color: var(--primary-900);
  text-decoration: none;
}

.thread-title:hover {
  color: var(--accent-text);
  text-decoration: underline;
}

.thread-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.35rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.pricing-header {
  text-align: center;
  margin-bottom: 2.25rem;
}

.pricing-header .page-subtitle {
  margin-left: auto;
  margin-right: auto;
}

.pricing-eyebrow {
  display: inline-block;
  padding: 0.25rem 0.85rem;
  margin-bottom: 0.75rem;
  border-radius: var(--radius-pill);
  background: var(--color-lilac-wash);
  color: var(--accent-text);
  font-size: var(--text-caption);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.term-banner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.9rem 1.25rem;
  background: var(--primary-50);
  border: 1px solid var(--primary-100);
  border-radius: var(--radius-lg);
}

.term-banner-icon {
  font-size: 1.3rem;
}

.term-banner-title {
  color: var(--color-ink-charcoal);
  font-size: 0.95rem;
}

.term-banner-text {
  font-size: 0.82rem;
  color: var(--accent-text);
}

.term-banner-badge {
  background: var(--color-iris-bolt);
  color: #ffffff;
}

.promo-title {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.25rem;
}

.promo-input {
  width: 11rem;
  text-transform: uppercase;
  font-weight: 700;
}

.pricing-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
}

.pricing-card {
  display: flex;
  flex-direction: column;
  position: relative;
  padding: clamp(1.35rem, 3vw, 2rem);
  border-radius: var(--radius-xl);
}

.pricing-card.is-featured {
  border: 2px solid var(--color-iris-bolt);
  box-shadow: var(--shadow-md);
}

.pricing-ribbon {
  position: absolute;
  top: -0.8rem;
  right: 1.5rem;
  letter-spacing: 0.02em;
  padding: 0.3rem 0.85rem;
}

.pricing-plan-name {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--primary-950);
  margin-bottom: 0.25rem;
}

.pricing-price {
  font-size: clamp(2rem, 1.6rem + 1.5vw, 2.5rem);
  font-weight: 600;
  color: var(--primary-950);
  margin-bottom: 1.5rem;
}

.pricing-period {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.pricing-features {
  margin-bottom: 2rem;
  color: var(--color-deep-indigo);
  font-size: 0.92rem;
}

.feature-list-star li::before {
  content: "⭐";
  font-size: 0.85em;
}

.pricing-card-footer {
  margin-top: auto;
}

.pricing-methods {
  margin-top: 0.75rem;
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.plan-selector {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.plan-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--border-color, #e2e8f0);
  border-radius: var(--radius-md, 8px);
  cursor: pointer;
  background: var(--surface, #fff);
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.plan-option:hover {
  border-color: var(--color-iris-bolt);
}

.plan-option.is-selected {
  border-color: var(--color-iris-bolt);
  background: rgba(99, 102, 241, 0.05);
}

.plan-option-content {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  text-align: left;
}

.plan-option-price {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--primary-950);
}

.faq {
  background: var(--color-chalk-canvas);
}

.faq-item {
  border-top: 1px solid var(--border-light);
  padding: 0.85rem 0;
  font-size: 0.92rem;
  color: var(--color-slate-veil);
}

.faq-item:last-child {
  padding-bottom: 0;
}

.faq-item summary {
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
}

.faq-item p {
  margin-top: 0.4rem;
  line-height: 1.6;
}

.status-card {
  text-align: center;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.status-card-danger {
  border-color: var(--danger-border-soft);
}

.status-card-sandbox {
  text-align: left;
  border: 2px dashed var(--color-mist-border);
}

.status-card-icon {
  font-size: 3.25rem;
  margin-bottom: 0.75rem;
}

.status-card-title {
  font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2rem);
  font-weight: 600;
  color: var(--primary-950);
  margin-bottom: 0.5rem;
}

.status-card-text {
  font-size: 1rem;
  color: var(--color-slate-veil);
  line-height: 1.55;
  margin-bottom: 1.5rem;
}

.status-card-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.detail-list {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 1rem;
  text-align: left;
  font-size: 0.88rem;
  color: var(--color-slate-veil);
  background: var(--color-chalk-canvas);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
}

.detail-list > div {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.detail-list dt {
  font-weight: 700;
  color: var(--text-main);
}

.detail-list dt::after {
  content: ":";
}

.detail-list dd {
  word-break: break-all;
}

.mono {
  font-family: var(--font-mono);
}

.checkout-header {
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-light);
}

.checkout-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--color-deep-indigo);
}

.checkout-amount {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-main);
}

/* ==========================================================================
   Student Study Pages (materials, flashcards, mock exams, readiness, share)
   ========================================================================== */
.hero-watermark {
  position: absolute;
  right: -0.5rem;
  bottom: -1.5rem;
  font-size: 8rem;
  opacity: 0.12;
  pointer-events: none;
  user-select: none;
}

.text-uppercase {
  text-transform: uppercase;
}

.table-link {
  color: var(--accent-text);
  font-size: 0.85rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.table-link:hover {
  text-decoration: underline;
}

.table-link-wrap { white-space: normal; }  /* a sentence-long link, which mustn't push a phone page sideways */

/* Materials */
.material-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.material-card-icon {
  font-size: 2rem;
  line-height: 1;
}

.material-card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.35;
  margin-bottom: 0.4rem;
}

.material-card-meta {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 0.85rem;
}

.material-card-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--surface-subtle);
}

.material-hero {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.material-hero-icon {
  font-size: 2.75rem;
  line-height: 1;
}

.material-hero-title {
  margin-bottom: 0.35rem;
  overflow-wrap: anywhere;
}

.concept-card-term {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-ink-charcoal);
  margin-bottom: 0.35rem;
}

.concept-card-text {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.cheat-sheet {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-ink-charcoal);
}

.predicted-q-number {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--primary-900);
}

.predicted-q-stem {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.55;
  margin-bottom: 1.15rem;
}

.btn-flashcard {
  background: var(--success-bg);
  border-color: var(--success-border-soft);
  color: var(--success-text);
}

.btn-flashcard:hover:not(:disabled) {
  background: var(--success-bg-strong);
}

.material-chat-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--surface-subtle);
}

.material-chat-avatar {
  font-size: 1.5rem;
}

.material-chat-feed {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-height: 180px;
  max-height: min(480px, 60vh);
  overflow-y: auto;
  margin-bottom: 1.25rem;
  padding: 0.5rem 0.15rem;
}

.material-chat-welcome {
  background: var(--color-chalk-canvas);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  padding: 0.85rem 1rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.material-chat-turn {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.material-chat-bubble {
  padding: 0.75rem 1rem;
  font-size: 0.92rem;
  line-height: 1.6;
}

.material-chat-bubble.is-user {
  align-self: flex-end;
  max-width: 85%;
  background: var(--navy);
  color: #ffffff;
  border-radius: 12px 12px 2px 12px;
}

.material-chat-bubble.is-mentor {
  align-self: flex-start;
  max-width: 92%;
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  border-radius: 12px 12px 12px 2px;
  box-shadow: var(--shadow-sm);
  color: var(--color-ink-charcoal);
}

.material-chat-author {
  font-size: var(--text-caption);
  font-weight: 600;
  color: var(--accent-text);
  margin-bottom: 0.35rem;
}

.material-chat-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.material-chat-form .form-input {
  flex: 1 1 220px;
}

.transcript-box {
  background: var(--color-chalk-canvas);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--color-deep-indigo);
  white-space: pre-wrap;
  max-height: 600px;
  overflow-y: auto;
}

/* Flashcards */
.leitner-grid {
  list-style: none;
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 110px), 1fr));
}

/* One brand hue that deepens from Box 1 (new) to Box 5 (mastered) */
.leitner-box {
  --leitner-accent: var(--primary-100);
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.85rem 1rem;
  background: var(--color-chalk-canvas);
  border-radius: var(--radius-card);
  color: var(--text-main);
}

.leitner-box-name {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--text-caption);
  font-weight: 600;
  color: var(--text-secondary);
}

.leitner-box-name::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--leitner-accent);
  flex-shrink: 0;
}

.leitner-box-count {
  font-size: var(--text-heading-sm);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-main);
  font-variant-numeric: tabular-nums;
}

.leitner-box-interval {
  font-size: var(--text-caption);
  color: var(--text-secondary);
}

.leitner-box.box-1 { --leitner-accent: #c7cdff; }
.leitner-box.box-2 { --leitner-accent: #a5afff; }
.leitner-box.box-3 { --leitner-accent: #8592ff; }
.leitner-box.box-4 { --leitner-accent: #6474ff; }
.leitner-box.box-5 { --leitner-accent: var(--color-iris-bolt); }

.leitner-box.box-5 .leitner-box-interval {
  color: var(--accent-text);
  font-weight: 600;
}

.deck-counter {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.deck-progress-bar {
  background: var(--color-iris-bolt);
}

.flashcard-container {
  position: relative;
  min-height: 420px;
}

.flashcard-inner-card {
  position: relative;
  width: 100%;
  min-height: 400px;
  padding: var(--spacing-32);
  background: var(--surface-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  transition: border-color 0.2s ease;
}

.flashcard-inner-card:hover {
  border-color: var(--color-iris-bolt);
}

.flashcard-inner-card.is-flipped {
  border-color: var(--color-iris-bolt);
  cursor: default;
}

.card-front:focus,
.card-back:focus {
  outline: none;
}

.flashcard-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--surface-subtle);
}

.flashcard-meta-answer {
  border-bottom-color: var(--success-bg-strong);
}

.flashcard-course {
  font-weight: 600;
  color: var(--primary-900);
  font-size: 0.95rem;
}

.flashcard-context {
  background: var(--color-chalk-canvas);
  border-left: 3px solid var(--color-slate-veil);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  font-style: italic;
}

.flashcard-question {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.flashcard-options {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.flashcard-options li {
  display: flex;
  gap: 0.5rem;
  padding: 0.6rem 0.85rem;
  background: var(--color-chalk-canvas);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  color: var(--color-deep-indigo);
}

.flashcard-option-letter {
  font-weight: 700;
  color: var(--text-secondary);
}

.flashcard-hint {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  margin-top: 2rem;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

kbd {
  background: var(--surface-hover);
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.85em;
}

.flashcard-answer-title {
  color: var(--success-text);
  font-weight: 600;
  font-size: 0.9rem;
}

.flashcard-answer {
  background: var(--success-bg);
  border: 1px solid var(--success-border-soft);
  border-radius: var(--radius-card);
  padding: 1rem;
  margin-bottom: 1.25rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--success-text);
  line-height: 1.5;
}

.flashcard-walkthrough {
  background: var(--color-chalk-canvas);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  padding: 1rem;
  max-height: 200px;
  overflow-y: auto;
  font-size: 0.875rem;
  color: var(--color-deep-indigo);
  line-height: 1.55;
  margin-bottom: 1.5rem;
}

.flashcard-walkthrough-title {
  font-weight: 700;
  color: var(--primary-900);
  margin-bottom: 0.35rem;
}

.flashcard-rating {
  border-top: 1px solid var(--border-light);
  padding-top: 1rem;
  text-align: center;
  cursor: default;
}

.flashcard-rating-title {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.rating-buttons-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}

.rating-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
  padding: 0.65rem 0.5rem;
  border: 1.5px solid;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.15s ease;
}

.rating-btn:active {
  transform: translateY(1px);
}

.rating-btn-hint {
  font-size: 0.72rem;
  font-weight: 500;
  opacity: 0.9;
}

.rating-again { background: var(--danger-bg); border-color: var(--danger-border-soft); color: var(--danger-text); }
.rating-again:hover { background: var(--danger-bg-strong); }
.rating-hard { background: var(--warning-bg); border-color: var(--warning-border); color: var(--warning-text); }
.rating-hard:hover { background: var(--warning-bg-strong); }
.rating-good { background: var(--info-bg); border-color: var(--info-border); color: var(--color-deep-indigo); }
.rating-good:hover { background: var(--primary-100); }
.rating-easy { background: var(--success-bg); border-color: var(--success-border-soft); color: var(--success-text); }
.rating-easy:hover { background: var(--success-bg-strong); }

.flashcard-panel {
  text-align: center;
  padding: clamp(1.75rem, 5vw, 3rem) clamp(1.25rem, 4vw, 2rem);
  border-radius: var(--radius-xl);
}

.flashcard-panel:focus {
  outline: none;
}

.flashcard-panel-icon {
  font-size: 3.5rem;
  margin-bottom: 1rem;
}

/* Mock exams */
.scorecard-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1.5px solid var(--surface-subtle);
}

.scorecard-score {
  gap: 1rem;
  flex-wrap: nowrap;
}

.scorecard-points {
  font-size: 2.5rem;
  font-weight: 600;
  line-height: 1;
}

.scorecard-max {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.grade-tile {
  width: 60px;
  height: 60px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  border: 2px solid;
  font-size: 1.75rem;
  font-weight: 600;
}

.grade-tile.is-success { background: var(--success-bg-strong); color: var(--success-text); border-color: var(--success-border-soft); }
.grade-tile.is-warning { background: var(--warning-bg-strong); color: var(--warning-text); border-color: var(--warning-border); }
.grade-tile.is-danger { background: var(--danger-bg-strong); color: var(--danger-text); border-color: var(--danger-border-soft); }

.metric-strip {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 160px), 1fr));
  padding: 1rem;
  background: var(--color-chalk-canvas);
  border-radius: var(--radius-card);
}

.metric-value {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--primary-800);
}

.topic-tile {
  background: var(--color-chalk-canvas);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  padding: 0.85rem 1rem;
}

.topic-tile-name {
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--text-main);
}

.review-card.is-correct { border-color: var(--success-border-soft); }
.review-card.is-incorrect { border-color: var(--danger-border-soft); }

.review-card-number {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--primary-800);
}

.review-card-content {
  font-size: 1rem;
  color: var(--color-ink-charcoal);
  line-height: 1.55;
  margin-bottom: 1rem;
  white-space: pre-line;
}

.answer-compare {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  background: var(--color-chalk-canvas);
  border-radius: var(--radius-md);
}

.answer-compare dd {
  font-weight: 600;
  font-size: 1rem;
}

/* Exam hall (standalone timed session) */
.exam-hall-body {
  background: var(--surface-bg);
}

.exam-hall-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1rem;
  padding: 0.75rem 1.5rem;
  background: var(--surface-card);
  border-bottom: 1px solid var(--border-light);
  box-shadow: var(--shadow-md);
}

.exam-hall-title {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  min-width: 0;
}

.exam-hall-avatar {
  font-size: 1.75rem;
}

.exam-hall-heading {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
}

.exam-hall-subtitle {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.exam-hall-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
}

.exam-hall-progress {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.exam-hall-progress .text-success {
  font-weight: 600;
}

.timer-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.timer-normal { background: var(--surface-subtle); color: var(--text-main); border: 1.5px solid var(--border-medium); }
.timer-warning { background: var(--warning-bg); color: var(--warning-strong); border: 1.5px solid var(--warning-border); }
.timer-danger { background: var(--danger-bg); color: var(--danger-strong); border: 1.5px solid var(--danger-border-soft); animation: timerPulse 1.5s infinite; }

@keyframes timerPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.exam-hall-expired {
  position: sticky;
  top: 4.5rem;
  z-index: 99;
  max-width: 1200px;
  margin: 1rem auto 0;
  padding: 0.85rem 1rem;
  background: var(--danger-bg);
  border: 1.5px solid var(--danger-border-soft);
  border-radius: var(--radius-md);
  color: var(--danger-text);
  font-weight: 700;
  text-align: center;
}

.exam-hall-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 2rem;
  align-items: flex-start;
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.question-card-hall {
  background: var(--surface-card);
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: clamp(1rem, 3vw, 1.5rem);
  margin-bottom: 1.5rem;
  scroll-margin-top: 100px;
}

.question-card-hall-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--surface-subtle);
}

.question-card-hall-number {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--primary-800);
}

.exam-flag {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.exam-scenario {
  background: var(--surface-subtle);
  border-left: 4px solid var(--color-iris-bolt);
  padding: 0.75rem 1rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 0.9rem;
  color: var(--color-deep-indigo);
  margin-bottom: 1rem;
  line-height: 1.5;
}

.exam-scenario-label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--color-deep-indigo);
  margin-bottom: 0.25rem;
}

.exam-question-text {
  font-size: 1.05rem;
  color: var(--text-main);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  white-space: pre-line;
}

.exam-figure {
  margin-bottom: 1.25rem;
  text-align: center;
}

.exam-figure img {
  max-width: 100%;
  max-height: 350px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-medium);
}

.exam-options {
  border: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.opt-radio-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.opt-radio-row:hover {
  background: var(--color-chalk-canvas);
  border-color: var(--border-medium);
}

.opt-radio-row input[type="radio"] {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  accent-color: var(--primary-600);
}

.opt-radio-row:has(input:checked) {
  background: var(--primary-50);
  border-color: var(--primary-500);
}

.opt-radio-row input[type="radio"]:checked + span {
  font-weight: 700;
  color: var(--primary-800);
}

.exam-hall-sidebar {
  position: sticky;
  top: 90px;
  background: var(--surface-card);
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.exam-navigator-heading {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--surface-subtle);
}

.exam-navigator {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(36px, 1fr));
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.nav-chip {
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-medium);
  background: var(--surface-card);
  color: var(--text-muted);
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
}

.nav-chip:hover {
  border-color: var(--primary-500);
}

.nav-chip.answered { background: var(--color-iris-bolt); color: #ffffff; border-color: var(--color-iris-bolt); }
.nav-chip.flagged { border: 2px solid #f59e0b; color: var(--warning-strong); font-weight: 600; }
.nav-chip.answered.flagged { color: #ffffff; }

.exam-legend {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--surface-subtle);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.exam-legend li {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.exam-legend-swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: var(--surface-card);
  border: 1px solid var(--border-medium);
}

.exam-legend-swatch.is-answered { background: var(--color-iris-bolt); border-color: var(--color-iris-bolt); }
.exam-legend-swatch.is-flagged { border: 1.5px solid #f59e0b; }

@media (max-width: 900px) {
  .exam-hall-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .exam-hall-sidebar {
    position: static;
    order: -1;
  }

  .exam-hall-header {
    padding: 0.75rem 1rem;
  }
}

/* Readiness */
.profile-icon {
  font-size: 1.5rem;
}

.profile-name {
  color: var(--primary-900);
  font-size: 0.95rem;
}

.readiness-card {
  display: flex;
  flex-direction: column;
}

.readiness-card form,
.readiness-card > .btn {
  margin-top: auto;
}

.readiness-card-code {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--primary-900);
}

.readiness-scores {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-bottom: 0.75rem;
  padding: 0.5rem 0.75rem;
  background: var(--color-chalk-canvas);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.readiness-advice {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.45;
  margin-bottom: 1rem;
  font-style: italic;
}

.today-tasks {
  border-color: var(--info-border);
}

.today-tasks-title {
  color: var(--info-text);
}

.task-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.study-task-item {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  background: var(--surface-card);
  transition: background-color 0.2s ease;
}

.study-task-item.task-completed {
  background: var(--success-bg);
  border-color: var(--success-border-soft);
}

.study-task-main {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  flex: 1 1 240px;
  min-width: 0;
}

.study-task-check {
  width: 1.15rem;
  height: 1.15rem;
  margin-top: 0.2rem;
  flex-shrink: 0;
  cursor: pointer;
  accent-color: var(--success-border);
}

.study-task-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--primary-900);
}

.task-completed .study-task-title {
  text-decoration: line-through;
  color: var(--text-secondary);
}

.study-task-desc {
  margin-top: 0.35rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.schedule-day {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  background: var(--color-chalk-canvas);
  padding: 1rem 1.25rem;
}

.schedule-day-title {
  font-weight: 600;
  font-size: 1rem;
  color: var(--primary-900);
}

.countdown-card {
  border-width: 1.5px;
}

.countdown-card.is-danger { border-color: var(--danger-border-soft); background: var(--danger-bg); }
.countdown-card.is-warning { border-color: var(--warning-border); background: var(--warning-bg); }
.countdown-card.is-success { border-color: var(--success-border-soft); background: var(--success-bg); }

.countdown-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.countdown-card-code {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary-900);
}

.countdown-remove {
  width: 1.75rem;
  height: 1.75rem;
  font-size: 1.2rem;
}

.countdown-days {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin: 0.75rem 0;
}

.countdown-days-number {
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1;
}

.countdown-days-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
}

.countdown-card-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.35rem;
  padding-top: 0.65rem;
  border-top: 1px dashed var(--color-mist-border);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.heatmap-verdict-icon {
  font-size: 1.6rem;
  line-height: 1;
}

.topic-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.topic-card-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.3;
  margin-bottom: 0.6rem;
}

.topic-evidence {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.5rem 0.65rem;
  margin-bottom: 0.75rem;
  background: var(--color-chalk-canvas);
  border-radius: var(--radius-md);
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.topic-evidence > div {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.25rem;
}

.topic-evidence dd strong {
  color: var(--text-main);
}

.topic-card-diagnosis {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.45;
  font-style: italic;
  margin-bottom: 1rem;
}

.topic-card-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--surface-subtle);
}

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

/* Share page */
.share-card {
  border-radius: var(--radius-card);
  padding: clamp(var(--spacing-16), 4vw, var(--spacing-32));
  box-shadow: var(--shadow-md);
  margin-bottom: var(--spacing-32);
}

.share-card:hover {
  box-shadow: var(--shadow-md);
}

.share-card-header {
  align-items: flex-start;
  padding-bottom: 1rem;
  margin-bottom: 1.25rem;
}

.share-badge {
  font-size: 0.8rem;
  padding: 0.3rem 0.7rem;
}

.share-scenario {
  background: var(--color-chalk-canvas);
  border-left-color: var(--primary-900);
  color: var(--color-deep-indigo);
  font-style: normal;
}

.share-question {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 1.5rem;
}

.share-figure {
  max-height: 480px;
}

.share-bar {
  margin-top: 1.75rem;
  padding-top: 1.25rem;
  border-top: 1.5px solid var(--surface-subtle);
}

.related-card {
  display: flex;
  flex-direction: column;
}

.related-card .btn {
  margin-top: auto;
}

.related-card-icon {
  font-size: 1.3rem;
  margin-bottom: 0.35rem;
}

.related-card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.25rem;
}

.related-card-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.45;
  margin-bottom: 1rem;
}

/* ==========================================================================
   Admin Workspace Additions
   ========================================================================== */
.admin-container {
  margin: 2rem auto 3rem;
}

.admin-page-header {
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
}

.admin-page-title {
  font-size: clamp(1.35rem, 1.1rem + 1vw, 1.75rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

.admin-card .section-title {
  font-size: 1.1rem;
}

.code-chip {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.8rem;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
  background: var(--primary-100);
  color: var(--color-ink-charcoal);
  border: 1px solid var(--primary-100);
  word-break: break-all;
}

.code-chip-lg {
  font-size: 0.95rem;
  font-weight: 600;
}

.admin-search {
  width: 16rem;
  max-width: 100%;
}

.exam-item-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-main);
  margin-bottom: 0.35rem;
}

.exam-item-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.editor-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.editor-header-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
}

.editor-exam-title {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.editor-exam-meta {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

.editor-details-form {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-light);
}

.editor-provenance {
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--border-light);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.bullet-list {
  list-style: disc;
  margin-left: 1.25rem;
}

fieldset {
  min-width: 0; /* browsers default fieldsets to min-content, which overflows narrow screens */
}

.mcq-options-panel {
  background: var(--warning-bg);
  border: 1px solid var(--warning-border);
  border-radius: var(--radius-md);
  padding: 0.75rem;
}

.mcq-options-legend {
  color: var(--warning-strong);
  padding: 0 0.25rem;
}

.mcq-option-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
}

.mcq-option-row:last-child {
  margin-bottom: 0;
}

.mcq-option-row .form-input {
  flex: 1;
  min-width: 0;
}

.mcq-option-letter {
  width: 1.25rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--warning-text);
}

.answer-textarea {
  background: var(--success-bg);
  border-color: var(--success-border-soft);
}

.form-textarea.mono {
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.admin-figure {
  margin: 0.85rem 0;
  padding: 0.75rem;
  background: var(--ai-bg);
  border: 1.5px solid var(--ai-border);
  border-radius: var(--radius-md);
}

.admin-figure-label {
  font-size: 0.775rem;
  font-weight: 700;
  color: var(--accent-text);
  text-transform: uppercase;
}

.admin-figure-link {
  font-size: 0.775rem;
  color: var(--accent-text);
}

.admin-figure-img {
  display: block;
  max-height: 14rem;
  max-width: 100%;
  object-fit: contain;
  border-radius: var(--radius-sm);
  border: 1px solid var(--primary-100);
  background: var(--surface-card);
}

.admin-q-option-item {
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
}

.admin-q-option-item.is-correct-key {
  background: var(--success-bg);
  border-color: var(--success-border-soft);
  color: var(--success-text);
  font-weight: 600;
}

.admin-q-option-item.is-correct-key .admin-q-option-letter {
  color: var(--success-strong);
  font-weight: 700;
}

.admin-q-option-letter {
  color: var(--text-secondary);
}

.admin-q-option-item.is-suggested {
  background: var(--ai-bg);
  border-color: var(--ai-border);
  color: var(--ai-text);
}

.admin-suggestion {
  border: 1.5px dashed var(--ai-border);
  border-radius: var(--radius-md);
  padding: 0.625rem 0.75rem;
  margin-bottom: 0.75rem;
  display: grid;
  gap: 0.5rem;
  font-size: 0.85rem;
}

.admin-suggestion.is-agreed {
  border-style: solid;
  background: var(--ai-bg);
}

.admin-suggestion-summary {
  display: flex;
  gap: 0.5rem;
  align-items: flex-start;
  color: var(--ai-text);
}

.admin-suggestion-reasoning summary {
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.admin-suggestion-reasoning > div {
  margin-top: 0.375rem;
  font-size: 0.8rem;
}

.admin-q-answer-title {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-bottom: 0.25rem;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
}

.admin-ai-panel {
  background: var(--ai-bg);
  border: 1.5px solid var(--ai-border);
  border-radius: var(--radius-md);
  padding: 0.75rem;
  margin-bottom: 0.75rem;
}

.admin-ai-panel-title {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--ai-text);
}

.admin-ai-panel-body {
  font-size: 0.875rem;
  color: var(--color-ink-charcoal);
}

.btn-link.admin-ai-regenerate {
  color: var(--accent-text);
  font-size: 0.775rem;
}

.admin-ai-generate {
  border-color: var(--primary-100);
  color: var(--accent-text);
}

.admin-edit-form-header {
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--info-border);
}

.admin-edit-form-title {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary-900);
  text-transform: uppercase;
}

.admin-edit-form-actions {
  gap: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--info-border);
}

.edit-panel {
  border: 1.5px solid;
  border-radius: var(--radius-md);
  padding: 0.75rem;
}

.edit-panel-preview {
  background: var(--surface-card);
  border-color: var(--info-border);
}

.edit-panel-ai {
  background: var(--ai-bg);
  border-color: var(--ai-border);
}

.edit-panel-success {
  background: var(--success-bg);
  border-color: var(--success-border-soft);
}

.edit-panel-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-text);
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}

.edit-panel .form-textarea {
  background: var(--surface-card);
}

.admin-help {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-light);
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-muted);
}

.admin-help p + p {
  margin-top: 0.25rem;
}

.import-job {
  margin-bottom: 0;
  padding: 1rem 1.25rem;
}

.import-job-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.import-job-filename {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-main);
}

.import-job-progress {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.25rem;
  font-size: 0.825rem;
  color: var(--text-muted);
}

.import-job-actions {
  gap: 1rem;
  margin-top: 0.75rem;
  font-size: 0.85rem;
}

.stat-unit {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.row-attention td {
  background: var(--warning-bg);
}

.insight-item {
  padding: 0.75rem;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  background: var(--color-chalk-canvas);
}

.insight-item-title {
  display: block;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--primary-900);
}

.insight-empty {
  text-align: center;
  padding: 1.5rem 0.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.hero-panel {
  background: var(--surface-card);
  border-radius: var(--radius-card);
  box-shadow: var(--card-shadow);
  padding: 1rem 1.25rem;
}

.hero-panel-label {
  font-size: var(--text-caption);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
}

.hero-panel-value {
  font-size: var(--text-heading-sm);
  font-weight: 700;
  color: var(--text-main);
}

.hero-panel-hint {
  font-size: var(--text-caption);
  font-weight: 600;
  color: var(--accent-text);
  margin-top: 0.2rem;
}

.programme-card {
  display: flex;
  flex-direction: column;
}

.programme-card-name {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--primary-900);
  margin: 0.4rem 0 0.2rem;
}

.programme-card-icon {
  font-size: 1.5rem;
}

.programme-card-courses {
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px solid var(--surface-subtle);
}

@media (max-width: 640px) {
  .editor-header-actions {
    align-items: flex-start;
    width: 100%;
  }

  .admin-search {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .rating-buttons-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .flashcard-inner-card {
    padding: 1.15rem;
    min-height: 0;
  }

  .scorecard-points {
    font-size: 2rem;
  }

  .timer-badge {
    font-size: 1.05rem;
  }

  .exam-hall-heading {
    font-size: 1rem;
  }
}

@media (max-width: 640px) {
  .page {
    margin-top: 1.25rem;
  }

  .form-input,
  .form-select,
  .form-textarea {
    font-size: 16px; /* Prevents iOS auto-zoom on focus */
  }

  .card {
    padding: 1rem;
  }

  .card-lg {
    padding: 1.15rem;
  }

  .stat-value {
    font-size: 1.5rem;
  }

  .exam-grid {
    grid-template-columns: 1fr;
  }

  .admin-card {
    padding: 1.15rem;
  }

  .admin-q-header,
  .exam-card-header {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .admin-card-actions,
  .action-row {
    flex-wrap: wrap;
  }

  .admin-subquestions-tree {
    margin-left: 0.25rem;
    padding-left: 0.75rem;
  }

  .modal-header,
  .modal-body,
  .modal-footer {
    padding-left: 1rem;
    padding-right: 1rem;
  }
}

/* ==========================================================================
   Quizlet-style App Shell
   Bold headings, borderless shadowed cards with a lavender hover underline,
   a white top bar (search / create / upgrade / account) and full-width
   content on desktop.
   ========================================================================== */
:root {
  --topbar-height: 64px;
  --content-gutter: 40px;
  --content-max: 1200px;      /* main content column on desktop */
  --content-max-narrow: 960px; /* reading pages (pricing, study material, results) */
  --upgrade-yellow: #ffcd1f;
  --upgrade-yellow-hover: #ffdc62;
  --card-shadow: 0 2px 8px rgba(40, 46, 62, 0.08);
  --card-shadow-hover: 0 6px 20px rgba(40, 46, 62, 0.12);
  --card-underline: #a8b1ff;
}

/* Bolder, Quizlet-like headings */
.page-title,
.hero-title,
.admin-page-title {
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-title,
.card-title,
.admin-card-title,
.modal-title,
.pricing-plan-name,
.status-card-title,
.auth-title,
.material-card-title,
.topic-card-title,
.readiness-card-code,
.countdown-card-code,
.exam-item-code {
  font-weight: 700;
}

/* Borderless white cards on the gray canvas */
.card,
.stat-tile,
.exam-card,
.admin-card,
.admin-q-card,
.exam-item-card {
  border-color: transparent;
  box-shadow: var(--card-shadow);
}

.exam-card:hover,
.admin-q-card:hover {
  box-shadow: var(--card-shadow);
}

/* Interactive cards: lift + lavender underline on hover, like Quizlet study sets */
.card-interactive,
.exam-item-card {
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.card-interactive:hover,
.card-interactive:focus-within,
.exam-item-card:hover {
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--card-shadow-hover), inset 0 -4px 0 var(--card-underline);
}

/* Quizlet's yellow upgrade button (Pro) */
.btn-gold {
  background: var(--upgrade-yellow);
  color: var(--on-gold);
}

.btn-gold:hover:not(:disabled) {
  background: var(--upgrade-yellow-hover);
}

.badge-gold {
  background: var(--upgrade-yellow);
  color: var(--on-gold);
}

/* Top bar is desktop-only; phones keep the compact bar + drawer */
.app-topbar {
  display: none;
}

@media (min-width: 1025px) {
  .app-topbar {
    position: sticky;
    top: 0;
    z-index: 40;
    display: flex;
    align-items: center;
    gap: var(--spacing-16);
    height: var(--topbar-height);
    padding: 0 var(--content-gutter);
    background: var(--color-paper-white);
    border-bottom: 1px solid var(--color-mist-border);
  }

  .topbar-search {
    flex: 1;
    max-width: 680px;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    height: 44px;
    padding: 0 1rem;
    background: var(--color-chalk-canvas);
    border: 2px solid transparent;
    border-radius: var(--radius-pill);
    color: var(--text-secondary);
    transition: border-color 0.15s ease, background-color 0.15s ease;
  }

  .topbar-search:focus-within {
    background: var(--surface-card);
    border-color: var(--color-iris-bolt);
  }

  .topbar-search .icon {
    width: 18px;
    height: 18px;
  }

  .topbar-search input {
    flex: 1;
    min-width: 0;
    border: none;
    background: transparent;
    font: inherit;
    font-size: var(--text-body-sm);
    color: var(--text-main);
    outline: none;
  }

  .topbar-search input::-webkit-search-cancel-button {
    cursor: pointer;
  }

  .topbar-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-left: auto;
  }

  .topbar-create {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-iris-bolt);
    color: #ffffff;
    box-shadow: var(--shadow-sm);
    transition: background-color 0.15s ease;
  }

  .topbar-create:hover {
    background: var(--color-accent-hover);
  }

  .topbar-create .icon {
    width: 20px;
    height: 20px;
    stroke-width: 2.5;
  }

  .topbar-create.topbar-create-labelled {
    width: auto;
    gap: 0.45rem;
    padding: 0 1.1rem 0 0.9rem;
    border-radius: var(--radius-pill);
    font-size: var(--text-body-sm);
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
  }

  .topbar-create.topbar-create-labelled .icon {
    width: 18px;
    height: 18px;
    stroke-width: 2;
  }

  .topbar-upgrade {
    min-height: 40px;
    padding: 0 1.1rem;
    font-size: var(--text-body-sm);
  }

  .account-menu {
    position: relative;
  }

  .account-menu summary {
    list-style: none;
  }

  .account-menu summary::-webkit-details-marker {
    display: none;
  }

  .account-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-100);
    color: var(--accent-text);
    font-weight: 700;
    font-size: var(--text-body);
    cursor: pointer;
    user-select: none;
  }

  .account-menu[open] > .account-avatar,
  .account-avatar:hover {
    box-shadow: 0 0 0 3px var(--color-accent-ring);
  }

  .account-avatar-lg {
    width: 44px;
    height: 44px;
    cursor: default;
  }

  .account-dropdown {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    width: 260px;
    padding: 0.5rem;
    background: var(--surface-card);
    border: 1px solid var(--color-mist-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-md);
    animation: fadeIn 0.15s ease-out;
  }

  .account-dropdown-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0.5rem 0.75rem;
    margin-bottom: 0.35rem;
    border-bottom: 1px solid var(--color-mist-border);
  }

  .account-name {
    font-weight: 700;
    color: var(--text-main);
  }

  .account-plan {
    font-size: var(--text-caption);
    color: var(--text-secondary);
  }

  .account-dropdown a {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.6rem 0.5rem;
    border-radius: var(--radius-sm);
    color: var(--text-main);
    font-size: var(--text-body-sm);
    text-decoration: none;
  }

  .account-dropdown a .icon {
    color: var(--text-secondary);
  }

  .account-dropdown a:hover {
    background: var(--color-chalk-canvas);
  }

  /* Sidebar: brand row lines up with the top bar; account lives in the top bar */
  .app-navbar-inner {
    padding-top: 0;
  }

  .brand-badge {
    height: var(--topbar-height);
    margin: 0 calc(-1 * var(--spacing-16));
    padding: 0 calc(var(--spacing-16) + 0.75rem);
    flex-shrink: 0;
  }

  .nav-account {
    display: none;
  }

  /* Content column: capped width, centred in the space beside the sidebar */
  .page,
  .page.page-lg,
  .admin-container {
    max-width: calc(var(--content-max) + 2 * var(--content-gutter));
    margin: var(--spacing-32) auto var(--spacing-64);
    padding: 0 var(--content-gutter);
  }

  .page.page-md {
    max-width: calc(var(--content-max-narrow) + 2 * var(--content-gutter));
  }

  .page.page-sm {
    max-width: calc(640px + 2 * var(--content-gutter));
  }

  .page.page-xs {
    max-width: calc(460px + 2 * var(--content-gutter));
  }

  .flash-stack {
    max-width: calc(var(--content-max) + 2 * var(--content-gutter));
    padding: 0 var(--content-gutter);
  }

  .chat-shell {
    max-width: var(--content-max-narrow);
    margin: var(--spacing-24) auto;
    height: calc(100vh - var(--topbar-height) - 3rem);
    height: calc(100dvh - var(--topbar-height) - 3rem);
  }


  .sticky-panel {
    top: calc(var(--topbar-height) + 1.5rem);
  }

  .exam-hall-sidebar {
    top: 90px;
  }
}

/* Touch screens: comfortable tap targets for small pill controls */
@media (pointer: coarse) {
  .chat-suggestion,
  .page-size-link {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
  }

  .page-size-link {
    min-width: 40px;
    justify-content: center;
  }
}

/* ==========================================================================
   Dark theme. Applied by the theme script in <head> via data-theme="dark"
   (from the user's choice, or the device setting when set to System).
   Fills keep the brand blue; text and icons use the lighter --accent-text.
   ========================================================================== */
:root[data-theme="dark"] {
  color-scheme: dark;

  --color-ink-charcoal: #e9ebf5;
  --color-deep-indigo: #c3c9e4;
  --color-slate-veil: #9ea7c5;
  --color-fog-mist: #6b7494;
  --color-chalk-canvas: #0e1222;
  --color-paper-white: #171c2f;
  --color-lilac-wash: #1f2650;
  --color-mist-border: #2a3152;
  --color-accent-hover: #5466ff;
  --color-accent-ring: rgba(122, 136, 255, 0.35);

  --surface-page-canvas: var(--color-chalk-canvas);
  --surface-card-surface: var(--color-paper-white);
  --surface-tinted-highlight: var(--color-lilac-wash);
  --surface-feature-card-pastels: #2e3770;
  --primary-100: #2e3770;

  --accent-text: #9ba6ff;
  --ai-text: var(--accent-text);
  --info-border: #2e3770;

  --success-bg: #0d2a22;
  --success-bg-strong: #12392d;
  --success-border: #34d399;
  --success-border-soft: #1e5a45;
  --success-text: #86efac;
  --success-strong: #34d399;

  --danger-bg: #2b1418;
  --danger-bg-strong: #3a1a1f;
  --danger-border: #f87171;
  --danger-border-soft: #6b2830;
  --danger-text: #fca5a5;
  --danger-strong: #f87171;

  --warning-bg: #2a2110;
  --warning-bg-strong: #382b12;
  --warning-border: #6b5321;
  --warning-text: #fcd34d;
  --warning-strong: #fbbf24;
  --accent-gold-light: #382b12;

  --shadow-sm: rgba(0, 0, 0, 0.35) 0px 2px 4px 0px;
  --shadow-md: rgba(0, 0, 0, 0.45) 0px 4px 16px 0px;
  --shadow-subtle: rgba(255, 255, 255, 0.06) 0px 0px 1px 0px inset;
  --card-shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
  --card-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.5);
  --card-underline: var(--color-iris-bolt);
}

/* Status colours sent by the server (inline --status). Light theme: darken the
   text so it reads on its pale tint. Dark theme: lighten the text and darken
   the tint. */
.status-tint {
  color: color-mix(in srgb, var(--status) 75%, #000000) !important;
}

:root[data-theme="dark"] .status-tint {
  color: color-mix(in srgb, var(--status) 55%, #ffffff) !important;
}

:root[data-theme="dark"] .badge.status-tint {
  background: color-mix(in srgb, var(--status) 25%, var(--surface-card)) !important;
  border-color: color-mix(in srgb, var(--status) 50%, transparent) !important;
}

/* Smooth the switch, but never animate the first paint */
.theme-ready body,
.theme-ready .app-navbar,
.theme-ready .app-topbar,
.theme-ready .card,
.theme-ready .chat-shell {
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

/* --- Theme toggle --- */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--color-mist-border);
  border-radius: 50%;
  background: var(--surface-card);
  color: var(--text-secondary);
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.theme-toggle:hover {
  background: var(--color-lilac-wash);
  border-color: var(--primary-100);
  color: var(--accent-text);
}

.theme-toggle .icon {
  width: 18px;
  height: 18px;
}

.theme-toggle .theme-icon-light,
.theme-toggle .theme-icon-dark,
.theme-toggle .theme-icon-system {
  display: none;
}

:root[data-theme-pref="light"] .theme-toggle .theme-icon-light,
:root[data-theme-pref="dark"] .theme-toggle .theme-icon-dark,
:root[data-theme-pref="system"] .theme-toggle .theme-icon-system,
:root:not([data-theme-pref]) .theme-toggle .theme-icon-system {
  display: inline-block;
}

/* Phones/tablets: toggle sits beside the menu button; desktop: in the top bar */
.theme-toggle-mobile {
  margin-left: auto;
}

.theme-toggle-mobile + .nav-toggle {
  margin-left: 0.5rem;
}

@media (min-width: 1025px) {
  .theme-toggle-mobile {
    display: none;
  }
}




/* ==========================================================================
   Admin Review Queue & Scan Viewer (theme tokens only, so dark mode follows)
   ========================================================================== */

.review-dot {
  display: inline-block;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  margin-right: 0.45rem;
  flex-shrink: 0;
  transform: translateY(-0.05rem);
}
.review-dot.error { background: var(--danger-strong); }
.review-dot.check { background: var(--warning-strong); }

.review-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  font-size: var(--text-body-sm);
  color: var(--text-muted);
}
.review-legend strong.error { color: var(--danger-text); }
.review-legend strong.check { color: var(--warning-text); }

.review-bulk-bar {
  position: sticky;
  top: 4.5rem;
  z-index: 5;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  margin-bottom: 0.75rem;
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
}
.review-bulk-bar label { display: inline-flex; align-items: center; gap: 0.45rem; font-weight: 600; cursor: pointer; }
.review-bulk-bar button:disabled { opacity: 0.5; cursor: not-allowed; }

.review-list { display: flex; flex-direction: column; gap: 0.6rem; }

.review-row-action {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.375rem;
}

.review-row {
  display: grid;
  grid-template-columns: 1.75rem minmax(0, 1fr) auto;
  gap: 0.75rem;
  align-items: start;
  padding: 0.9rem 1rem;
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  border-left: 4px solid var(--success-strong);
  border-radius: var(--radius-card);
}
.review-row.has-errors { border-left-color: var(--danger-strong); }
.review-row-select { padding-top: 0.15rem; text-align: center; color: var(--danger-text); }
.review-row-select input { width: 1.1rem; height: 1.1rem; cursor: pointer; accent-color: var(--primary-600); }
.review-row-title { display: flex; align-items: baseline; gap: 0.6rem; flex-wrap: wrap; }
.review-row-meta { font-size: var(--text-caption); color: var(--text-muted); margin-top: 0.2rem; }
.review-row-meta code { overflow-wrap: anywhere; }
.review-row-ok { font-size: var(--text-caption); color: var(--success-text); margin-top: 0.4rem; }

.review-issues {
  list-style: none;
  margin: 0.5rem 0 0;
  padding: 0;
  font-size: var(--text-caption);
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.review-issues li { display: flex; align-items: baseline; }
.review-issues li.error { color: var(--danger-text); font-weight: 600; }
.review-issues li.check { color: var(--warning-text); }

.scan-viewer-tabs { display: flex; gap: 0.4rem; margin-bottom: 0.75rem; flex-wrap: wrap; }
.scan-viewer-tabs .chip-filter { flex: 1; justify-content: center; }

.scan-pages { display: flex; flex-wrap: wrap; gap: 0.25rem; margin-bottom: 0.5rem; }
.scan-pages button {
  min-width: 2.25rem;
  min-height: 2rem;
  padding: 0.2rem 0.45rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  background: var(--surface-subtle);
  color: var(--text-main);
  font-size: var(--text-caption);
  font-family: var(--font-mono);
  cursor: pointer;
}
.scan-pages button.active { background: var(--primary-600); border-color: var(--primary-600); color: var(--text-inverse); }

.scan-image-frame {
  max-height: calc(100vh - 15rem);
  overflow: auto;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  background: var(--surface-subtle);
}
/* Scans stay white paper in dark mode; only the frame follows the theme */
.scan-image-frame img { display: block; width: 100%; height: auto; cursor: zoom-in; background: #fff; }
.scan-image-frame.zoomed img { width: 200%; max-width: none; cursor: zoom-out; }

/* Phones/tablets: one column, so put the scan above the questions instead of after all of them */
@media (max-width: 900px) {
  .editor-side.has-scan { order: -1; scroll-margin-top: calc(var(--topbar-height, 4rem) + 0.5rem); }
  .editor-side.has-scan .sticky-panel { position: static; }
  .editor-side.has-scan .scan-image-frame { max-height: 60vh; }
}

@media (max-width: 640px) {
  .review-row { grid-template-columns: 1.5rem minmax(0, 1fr); }
  .review-row-action { grid-column: 2; align-items: flex-start; }
  .review-bulk-bar { top: 3.75rem; }
}

/* Sidebar: features that need a free account, shown to guests */
.nav-lock {
  margin-left: auto;
  display: inline-flex;
  opacity: 0.55;
}

.nav-lock .icon {
  width: 0.85rem;
  height: 0.85rem;
}

/* Admin -> Settings */
.settings-grid {
  display: grid;
  gap: 0.25rem 1.5rem;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  margin-bottom: 1rem;
}

.setting-head {
  gap: 0.5rem;
  align-items: baseline;
}

.setting-number {
  max-width: 10rem;
}

/* --- Course & paper lists with search and filters (Flashcards, Mock Exams) --- */
.course-filters {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.course-search {
  position: relative;
}

.course-search .form-input {
  width: 100%;
  padding-left: 2.5rem;
}

.course-search-icon {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  display: inline-flex;
  pointer-events: none;
}

.chip-scroll {
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 2px;
  min-width: 0;
}

.chip-scroll::-webkit-scrollbar { display: none; }

.chip-scroll .chip-filter {
  flex: 0 0 auto;
  white-space: nowrap;
}

.chip-count {
  font-size: var(--text-caption);
  color: var(--text-muted);
}

.course-filters-row {
  flex-wrap: nowrap;
  min-width: 0;
}

.course-filters-row .chip-scroll {
  flex: 1 1 auto;
}

.course-year {
  flex: 0 0 auto;
  width: auto;
  padding-top: 0.35rem;
  padding-bottom: 0.35rem;
}

.course-filters-status {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.course-list-heading {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--text-body-sm);
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.5rem;
}

.course-list {
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.course-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  min-height: 3.5rem;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: -1px; /* the last visible row's divider falls outside the list and is clipped */
  color: var(--text-main);
  text-decoration: none;
}

a.course-row:hover,
a.course-row:focus-visible {
  background: var(--surface-subtle);
}

.course-row-main {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  flex: 1 1 auto;
  min-width: 0;
}

.course-row-code {
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.course-row-meta {
  font-size: var(--text-body-sm);
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.course-code-link {
  color: inherit;
  text-decoration: none;
}

.course-row-go {
  display: inline-flex;
  color: var(--accent-text);
  flex: 0 0 auto;
}

/* A wide table's last column (its actions) stays in view while the rest scrolls sideways */
.table-sticky-actions th:last-child,
.table-sticky-actions td:last-child {
  position: sticky;
  right: 0;
  background: var(--surface-card);
  box-shadow: -6px 0 6px -6px rgba(0, 0, 0, 0.15);
}

/* AI study notes rendered from Markdown (app.services.text_format) */
.cheat-sheet h3, .cheat-sheet h4, .cheat-sheet h5 { font-weight: 600; margin: 1rem 0 0.4rem; }
.cheat-sheet h3:first-child, .cheat-sheet h4:first-child { margin-top: 0; }
.cheat-sheet p { margin: 0 0 0.6rem; }
.cheat-sheet ul { margin: 0 0 0.75rem; padding-left: 1.25rem; list-style: disc; }
.cheat-sheet li { margin-bottom: 0.3rem; }

/* Keyboard shortcuts mean nothing on a phone */
@media (hover: none) and (pointer: coarse) {
  .hide-on-touch { display: none; }
}

/* Finger-sized tap targets on touch screens (about 44px), without changing desktop layouts */
@media (pointer: coarse) {
  .btn-sm,
  .chip-filter,
  .chip-btn,
  .chat-suggestion,
  .btn-reveal,
  .btn-solve,
  .btn-grade,
  .share-chip { min-height: 2.75rem; }
  .alert-dismiss,
  .countdown-remove { min-width: 2.75rem; min-height: 2.75rem; display: inline-flex; align-items: center; justify-content: center; }
  .study-task-check { width: 1.5rem; height: 1.5rem; margin: 0.6rem; }
}

/* Tabs that wrap onto a second row on a phone instead of hiding off the edge */
.tabs-wrap { flex-wrap: wrap; overflow-x: visible; }
.tabs-wrap .tab { flex: 1 1 auto; justify-content: center; }
@media (max-width: 480px) {
  .tabs-wrap .tab { flex-basis: calc(50% - 0.35rem); }
}

/* Uncle Kwaku's face (components/icons.html uncle_kwaku) in place of the cap icon: the logo tile
   and his chat avatar. The picture brings its own lilac background. */
.has-avatar {
  background: none;
  border-radius: 50%;
  overflow: hidden;
  padding: 0;
}

.has-avatar .uk-avatar {
  display: block;
  width: 100%;
  height: 100%;
}

.material-chat-avatar.has-avatar,
.exam-hall-avatar.has-avatar {
  display: inline-flex;
  width: 1.6em;
  height: 1.6em;
  flex-shrink: 0;
}

.nav-pro-tag {
  margin-left: auto;
  padding: 0.05rem 0.4rem;
  border-radius: var(--radius-pill);
  background: var(--upgrade-yellow);
  color: var(--on-gold);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

/* Privacy, terms and data deletion (app/routes/legal_routes.py) */
.app-legal-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1.25rem;
  padding: 2rem 1rem 1.5rem;
  font-size: 0.8rem;
}

.app-legal-footer a {
  color: var(--text-muted);
}

.legal-body h2 {
  font-size: 1.1rem;
  margin: 1.75rem 0 0.5rem;
}

.legal-body h2:first-child {
  margin-top: 0;
}

.legal-body p,
.legal-body li {
  line-height: 1.65;
}

.legal-body ul,
.legal-body ol {
  padding-left: 1.25rem;
  margin: 0.5rem 0 1rem;
}

.legal-body li + li {
  margin-top: 0.35rem;
}