/* ==========================================================================
   TSMU 5th Year Urology — Clinical Study Tool
   Mobile-first. Warm low-glare paper (light) / OLED clinical (dark).
   ========================================================================== */

:root {
  --bg-primary: #FAF8F5;
  --bg-elevated: #F3F0EA;
  --bg-interactive: #EAE6DF;
  --bg-sticky: rgba(250, 248, 245, 0.94);

  --ink-primary: #18181B;
  --ink-secondary: #3F3F46;
  --ink-muted: #5E5E66;

  --hairline: #E6E2DA;
  --hairline-strong: #D4CFC6;

  --crimson-ink: #B91C1C;
  --crimson-bg: rgba(220, 38, 38, 0.07);
  --crimson-border: rgba(220, 38, 38, 0.30);

  --amber-ink: #92400E;
  --amber-bg: rgba(217, 119, 6, 0.09);
  --amber-border: rgba(217, 119, 6, 0.32);

  --emerald-ink: #065F46;
  --emerald-solid: #047857;
  --emerald-bg: rgba(5, 150, 105, 0.09);
  --emerald-border: rgba(5, 150, 105, 0.32);

  --cloze-bg: #E6E1D7;
  --cloze-line: #B8AE9E;

  --focus: #B45309;

  --font-sans: 'FiraGO', 'Noto Sans Georgian', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --radius: 8px;
  --radius-sm: 6px;
  --header-h: 64px;
  --tabbar-h: 60px;
  --gutter: 16px;
}

[data-theme="dark"] {
  --bg-primary: #0E0E10;
  --bg-elevated: #17171A;
  --bg-interactive: #222226;
  --bg-sticky: rgba(14, 14, 16, 0.94);

  --ink-primary: #F4F4F5;
  --ink-secondary: #D4D4D8;
  --ink-muted: #A1A1AA;

  --hairline: #26262A;
  --hairline-strong: #3A3A40;

  --crimson-ink: #FCA5A5;
  --crimson-bg: rgba(239, 68, 68, 0.12);
  --crimson-border: rgba(239, 68, 68, 0.38);

  --amber-ink: #FCD34D;
  --amber-bg: rgba(245, 158, 11, 0.12);
  --amber-border: rgba(245, 158, 11, 0.38);

  --emerald-ink: #6EE7B7;
  --emerald-solid: #10B981;
  --emerald-bg: rgba(16, 185, 129, 0.12);
  --emerald-border: rgba(16, 185, 129, 0.38);

  --cloze-bg: #2A2A2F;
  --cloze-line: #5A5A62;

  --focus: #FBBF24;
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  background: var(--bg-primary);
  color: var(--ink-primary);
  scroll-padding-top: calc(var(--header-h) + 12px);
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  font-variant-numeric: tabular-nums;
  background: var(--bg-primary);
  color: var(--ink-primary);
  -webkit-tap-highlight-color: transparent;
  padding-bottom: calc(var(--tabbar-h) + env(safe-area-inset-bottom, 0px) + 16px);
  overflow-wrap: break-word;
}

::selection { background: var(--amber-border); color: var(--ink-primary); }

button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
  border-radius: 4px;
}

.icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 8px;
  z-index: 100;
  background: var(--ink-primary);
  color: var(--bg-primary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
}
.skip-link:focus { left: 8px; }

/* ==========================================================================
   HEADER
   ========================================================================== */
.top-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--bg-sticky);
  -webkit-backdrop-filter: saturate(1.2) blur(10px);
  backdrop-filter: saturate(1.2) blur(10px);
  border-bottom: 1px solid var(--hairline);
  padding: 8px var(--gutter) 10px;
  padding-top: max(8px, env(safe-area-inset-top, 0px));
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  max-width: 1180px;
  margin: 0 auto;
}

.brand { min-width: 0; }

.brand-title {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.25;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-tag {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--ink-muted);
  margin-left: 4px;
}

.brand-tag-extra { display: none; }
@media (min-width: 560px) { .brand-tag-extra { display: inline; } }

.header-actions { display: flex; align-items: center; gap: 4px; flex-shrink: 0; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-width: 40px;
  height: 40px;
  padding: 0 10px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: transparent;
  color: var(--ink-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.icon-btn:hover { background: var(--bg-elevated); color: var(--ink-primary); }
.icon-btn:active { background: var(--bg-interactive); }

.icon-btn[aria-pressed="true"] {
  background: var(--amber-bg);
  border-color: var(--amber-border);
  color: var(--amber-ink);
}

/* Labels only where there is room */
.icon-btn-label { display: none; }
@media (min-width: 560px) {
  .icon-btn-label { display: inline; }
}

.progress-strip {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 1180px;
  margin: 6px auto 0;
}

.progress-track {
  flex: 1;
  height: 4px;
  border-radius: 999px;
  background: var(--bg-interactive);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  border-radius: inherit;
  background: var(--emerald-solid);
  transition: width 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.progress-stats {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ink-muted);
  white-space: nowrap;
}

/* ==========================================================================
   LAYOUT — single column on mobile, sidebar + reading column on desktop
   ========================================================================== */
.layout {
  max-width: 1180px;
  margin: 0 auto;
}

.content { min-width: 0; }

#main-content:focus { outline: none; }

/* ---------- Mode bar: fixed bottom tab bar on mobile ---------- */
.mode-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background: var(--bg-sticky);
  -webkit-backdrop-filter: saturate(1.2) blur(10px);
  backdrop-filter: saturate(1.2) blur(10px);
  border-top: 1px solid var(--hairline-strong);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

.mode-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  height: var(--tabbar-h);
  border: none;
  background: transparent;
  color: var(--ink-muted);
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.2;
  position: relative;
}

.mode-btn .icon { width: 22px; height: 22px; }
.mode-hint { display: none; }

.mode-btn[aria-pressed="true"] { color: var(--ink-primary); }
.mode-btn[aria-pressed="true"]::before {
  content: "";
  position: absolute;
  top: 0;
  left: 28%;
  right: 28%;
  height: 2px;
  border-radius: 0 0 2px 2px;
  background: var(--amber-ink);
}
.mode-btn[aria-pressed="true"] .icon { stroke-width: 2.2; }

/* ---------- Module chips (mobile) ---------- */
.sidebar-heading { display: none; }

.module-nav {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 10px var(--gutter);
  scrollbar-width: none;
  scroll-snap-type: x proximity;
  -webkit-mask-image: linear-gradient(90deg, #000 calc(100% - 28px), transparent);
  mask-image: linear-gradient(90deg, #000 calc(100% - 28px), transparent);
}
.module-nav::-webkit-scrollbar { display: none; }

.module-tab {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 36px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--hairline-strong);
  background: var(--bg-primary);
  color: var(--ink-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  white-space: nowrap;
  scroll-snap-align: start;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.module-tab:hover { background: var(--bg-elevated); }

.module-tab[aria-current="true"] {
  background: var(--ink-primary);
  border-color: var(--ink-primary);
  color: var(--bg-primary);
  font-weight: 600;
}

.mod-num { font-weight: 700; }
.mod-name-full { display: none; }
.mod-count { display: none; }

/* ---------- Cram plan ---------- */
.cram-plan {
  margin: 0 var(--gutter) 4px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: var(--bg-elevated);
}

.cram-plan summary {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 8px 12px;
  list-style: none;
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ink-secondary);
}
.cram-plan summary::-webkit-details-marker { display: none; }
.cram-plan summary .icon { width: 18px; height: 18px; color: var(--amber-ink); }
.cram-plan summary span { flex: 1; }
.cram-plan .chevron { color: var(--ink-muted); transition: transform 0.2s ease; }
.cram-plan[open] .chevron { transform: rotate(180deg); }

.cram-plan-body {
  display: grid;
  gap: 14px;
  padding: 4px 14px 14px;
  font-size: 0.88rem;
  color: var(--ink-secondary);
}

.cram-day-title {
  font-weight: 700;
  color: var(--ink-primary);
  margin-bottom: 4px;
}
.cram-share { color: var(--amber-ink); font-weight: 600; margin-left: 4px; }
.cram-day ol { padding-left: 18px; display: grid; gap: 4px; }

/* ---------- Toolbar (search + filter) ---------- */
.toolbar {
  display: flex;
  gap: 8px;
  padding: 12px var(--gutter) 8px;
}

.search-field {
  flex: 1;
  min-width: 0;
  position: relative;
  display: flex;
  align-items: center;
}

.search-field > .icon {
  position: absolute;
  left: 12px;
  width: 18px;
  height: 18px;
  color: var(--ink-muted);
  pointer-events: none;
}

.search-input {
  width: 100%;
  height: 44px;
  padding: 0 40px 0 38px;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius);
  background: var(--bg-primary);
  color: var(--ink-primary);
  font-size: 1rem; /* ≥16px avoids iOS zoom */
  -webkit-appearance: none;
  appearance: none;
}
.search-input::placeholder { color: var(--ink-muted); }
.search-input::-webkit-search-cancel-button { display: none; }
.search-input:focus { outline: none; border-color: var(--ink-secondary); box-shadow: 0 0 0 3px var(--amber-bg); }

.search-clear {
  position: absolute;
  right: 4px;
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--ink-muted);
}
.search-clear .icon { width: 16px; height: 16px; }
.search-clear[hidden] { display: none; }

.filter-select {
  flex: 0 0 auto;
  max-width: 40%;
  height: 44px;
  padding: 0 32px 0 12px;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius);
  background: var(--bg-primary) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235E5E66' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") no-repeat right 10px center / 16px;
  color: var(--ink-primary);
  font-size: 0.9rem;
  font-weight: 600;
  -webkit-appearance: none;
  appearance: none;
}

/* ==========================================================================
   CONTENT
   ========================================================================== */
.view-intro {
  padding: 4px var(--gutter) 12px;
  font-size: 0.85rem;
  color: var(--ink-muted);
}

.view-intro strong { color: var(--ink-secondary); font-weight: 600; }

.module-section + .module-section { margin-top: 20px; }

.module-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 10px var(--gutter) 8px;
}

.module-title {
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.35;
  text-wrap: balance;
}

.module-count {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-muted);
  white-space: nowrap;
}

.topic-list {
  margin: 0 var(--gutter);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: var(--bg-primary);
  overflow: hidden;
}

/* ---------- Topic row ---------- */
.topic-item + .topic-item { border-top: 1px solid var(--hairline); }

.topic-bar {
  display: flex;
  align-items: flex-start;
  gap: 4px;
  padding: 4px 6px 4px 0;
}

.topic-toggle {
  flex: 1;
  min-width: 0;
  display: block;
  text-align: left;
  border: none;
  background: transparent;
  padding: 10px 6px 10px 14px;
  border-radius: var(--radius-sm);
}
.topic-toggle:hover .topic-heading { color: var(--ink-primary); }

.topic-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 8px;
  margin-bottom: 2px;
  font-size: 0.75rem;
  color: var(--ink-muted);
  line-height: 1.4;
}

.topic-code { font-weight: 700; color: var(--ink-secondary); }

.topic-heading {
  display: block;
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.45;
  color: var(--ink-primary);
}

.topic-item.is-mastered .topic-heading { color: var(--ink-muted); }

.topic-side {
  display: flex;
  align-items: center;
  gap: 0;
  padding-top: 8px;
  flex-shrink: 0;
}

.chevron-btn {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  color: var(--ink-muted);
  border-radius: var(--radius-sm);
  pointer-events: none;
}
.chevron-btn .icon { transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1); }
.topic-item.is-open .chevron-btn .icon { transform: rotate(180deg); }

/* Round "mastered" check */
.check-btn {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  border-radius: 50%;
  color: var(--ink-muted);
}
.check-btn .check-ring {
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1.5px solid var(--hairline-strong);
  transition: background-color 0.15s ease, border-color 0.15s ease;
}
.check-btn .icon { width: 14px; height: 14px; stroke-width: 2.6; opacity: 0; }
.check-btn:hover .check-ring { border-color: var(--emerald-solid); }
.check-btn:hover .icon { opacity: 0.4; color: var(--emerald-solid); }
.check-btn[aria-pressed="true"] .check-ring { background: var(--emerald-solid); border-color: var(--emerald-solid); }
.check-btn[aria-pressed="true"] .icon { opacity: 1; color: #fff; }

/* Tags */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 0 6px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  line-height: 1.6;
}
.tag .icon { width: 12px; height: 12px; stroke-width: 2.2; }
.tag-trap { background: var(--crimson-bg); color: var(--crimson-ink); }
.tag-hot { background: var(--amber-bg); color: var(--amber-ink); }

/* ---------- Topic body ---------- */
.topic-body {
  padding: 2px 16px 18px 14px;
  font-size: 0.95rem;
  color: var(--ink-primary);
  max-width: 72ch;
}
.topic-body[hidden] { display: none; }

.callout {
  margin: 8px 0 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.93rem;
}
.callout-label {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 2px;
  font-size: 0.75rem;
  font-weight: 700;
}
.callout-label .icon { width: 14px; height: 14px; stroke-width: 2.2; }
.callout-red { background: var(--crimson-bg); }
.callout-red .callout-label { color: var(--crimson-ink); }
.callout-pearl { background: var(--amber-bg); }
.callout-pearl .callout-label { color: var(--amber-ink); }

.clinical-list { list-style: none; display: grid; gap: 8px; margin-top: 4px; }
.clinical-list li { position: relative; padding-left: 16px; }
.clinical-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.68em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--ink-muted);
}
.clinical-list strong { font-weight: 700; }

.topic-footer {
  display: flex;
  justify-content: flex-end;
  margin-top: 14px;
}

.mark-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 40px;
  padding: 0 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--hairline-strong);
  background: var(--bg-primary);
  color: var(--ink-secondary);
  font-size: 0.85rem;
  font-weight: 600;
}
.mark-btn .icon { width: 16px; height: 16px; stroke-width: 2.4; }
.mark-btn:hover { background: var(--bg-elevated); }
.mark-btn[aria-pressed="true"] {
  background: var(--emerald-bg);
  border-color: var(--emerald-border);
  color: var(--emerald-ink);
}

/* ==========================================================================
   CLOZE — tap to reveal
   ========================================================================== */
.cloze {
  border-radius: 3px;
  padding: 0 3px;
  cursor: pointer;
  font-weight: 600;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.cloze.masked {
  background: var(--cloze-bg);
  color: transparent;
  box-shadow: inset 0 -1.5px 0 var(--cloze-line);
  user-select: none;
  -webkit-user-select: none;
}
.cloze.masked:hover { background: var(--bg-interactive); }

.cloze.revealed {
  background: var(--emerald-bg);
  color: inherit;
}

/* ==========================================================================
   TABLES
   ========================================================================== */
.table-wrap {
  margin: 14px 0 4px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
}

.clinical-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  line-height: 1.5;
  min-width: 480px;
}

.clinical-table th,
.clinical-table td {
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--hairline);
}
.clinical-table tr:last-child td { border-bottom: none; }
.clinical-table th { background: var(--bg-elevated); font-weight: 700; }
.clinical-table td:first-child { font-weight: 600; }

/* ==========================================================================
   95 QUESTIONS
   ========================================================================== */
.q-list {
  margin: 0 var(--gutter);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
}

.q-row { padding: 12px 6px 14px 14px; }
.q-row + .q-row { border-top: 1px solid var(--hairline); }

.q-top { display: flex; align-items: flex-start; gap: 4px; }

.q-question {
  flex: 1;
  min-width: 0;
  padding-top: 8px;
  font-size: 0.97rem;
  font-weight: 600;
  line-height: 1.45;
}

.q-num { color: var(--amber-ink); font-weight: 700; margin-right: 4px; }
.q-question .tag { margin-right: 4px; vertical-align: 1px; }
.q-row.is-mastered .q-question { color: var(--ink-muted); }

.q-answer {
  display: block;
  width: calc(100% - 8px);
  margin-top: 8px;
  padding: 10px 12px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--emerald-bg);
  color: var(--ink-primary);
  text-align: left;
  font-size: 0.93rem;
  line-height: 1.55;
}

.q-answer.masked-answer {
  background: var(--bg-elevated);
  color: var(--ink-muted);
  box-shadow: inset 0 0 0 1px var(--hairline-strong);
  font-weight: 500;
}
.q-answer.masked-answer:hover { background: var(--bg-interactive); }
.q-answer .a-text[hidden] { display: none; }

/* ---------- Blitz card ---------- */
.blitz {
  margin: 4px var(--gutter) 14px;
  padding: 12px 12px 14px 14px;
  border: 1px solid var(--amber-border);
  border-radius: var(--radius);
  background: var(--amber-bg);
}
.blitz[hidden] { display: none; }

.blitz-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--amber-ink);
}
.blitz-actions { display: flex; gap: 4px; }
.blitz-actions .icon-btn { height: 36px; min-width: 36px; color: var(--amber-ink); }
.blitz-actions .icon-btn:hover { background: var(--amber-bg); }
.blitz-q { font-size: 1rem; font-weight: 700; line-height: 1.45; }
.blitz .q-answer { width: 100%; }
.blitz .q-answer.masked-answer { background: var(--bg-primary); }

/* Empty state */
.empty-state {
  margin: 8px var(--gutter);
  padding: 32px 16px;
  text-align: center;
  color: var(--ink-muted);
  font-size: 0.92rem;
  border: 1px dashed var(--hairline-strong);
  border-radius: var(--radius);
}
.empty-state button {
  margin-top: 12px;
  min-height: 40px;
  padding: 0 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--hairline-strong);
  background: var(--bg-primary);
  font-weight: 600;
  font-size: 0.88rem;
}

/* ==========================================================================
   DESKTOP ≥ 960px — sidebar + reading column, no bottom bar
   ========================================================================== */
@media (min-width: 960px) {
  :root { --gutter: 0px; }

  body { padding-bottom: 64px; }

  .top-header { padding-left: 24px; padding-right: 24px; }

  .layout {
    display: grid;
    grid-template-columns: 288px minmax(0, 1fr);
    gap: 40px;
    padding: 0 24px;
  }

  .sidebar {
    position: sticky;
    top: var(--header-h);
    align-self: start;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    padding: 20px 0 24px;
    scrollbar-width: thin;
  }

  .content { max-width: 780px; padding-top: 8px; }

  .mode-bar {
    position: static;
    display: grid;
    grid-template-columns: 1fr;
    gap: 2px;
    padding: 0;
    border: none;
    background: transparent;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }

  .mode-btn {
    display: grid;
    grid-template-columns: 22px 1fr;
    grid-template-rows: auto auto;
    column-gap: 10px;
    align-items: center;
    justify-items: start;
    height: auto;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    text-align: left;
    font-size: 0.92rem;
    color: var(--ink-secondary);
  }
  .mode-btn .icon { grid-row: 1 / 3; width: 20px; height: 20px; }
  .mode-hint { display: block; font-size: 0.75rem; font-weight: 500; color: var(--ink-muted); }
  .mode-btn:hover { background: var(--bg-elevated); }
  .mode-btn[aria-pressed="true"] { background: var(--bg-interactive); color: var(--ink-primary); }
  .mode-btn[aria-pressed="true"]::before { display: none; }

  .sidebar-section { margin-top: 24px; }
  .sidebar-heading {
    display: block;
    padding: 0 10px 6px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--ink-muted);
  }

  .module-nav {
    flex-direction: column;
    gap: 1px;
    padding: 0;
    overflow: visible;
    -webkit-mask-image: none;
    mask-image: none;
  }

  .module-tab {
    display: grid;
    grid-template-columns: 30px 1fr auto;
    gap: 6px;
    width: 100%;
    min-height: 34px;
    padding: 6px 10px;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    text-align: left;
    white-space: normal;
    line-height: 1.35;
    font-size: 0.86rem;
  }
  .module-tab:hover { background: var(--bg-elevated); }
  .module-tab[aria-current="true"] {
    background: var(--bg-interactive);
    color: var(--ink-primary);
    border: none;
  }
  .mod-num { color: var(--ink-muted); font-weight: 600; }
  .module-tab[aria-current="true"] .mod-num { color: var(--amber-ink); }
  .mod-name-short { display: none; }
  .mod-name-full { display: inline; }
  .mod-count { display: inline; font-size: 0.75rem; color: var(--ink-muted); font-weight: 500; }
  .module-tab.all-tab { grid-template-columns: 1fr auto; }

  .cram-plan { margin: 24px 0 0; }
  .cram-plan-body { font-size: 0.84rem; }

  .toolbar { padding: 12px 0; }
  .view-intro { padding: 0 0 12px; }
  .module-header { padding: 16px 0 10px; }
  .module-section + .module-section { margin-top: 16px; }
  .topic-body { padding: 4px 24px 20px 14px; }
  .blitz { margin: 0 0 16px; }
}

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