/* IAL Prep — question bank styles.
   Reuses the Physics Hub palette from styles.css. Each subject sets its own
   accent colours on body[data-subject]; physics uses the navy and blue. */
body.bank {
  --accent: #007bff;
  --accent-deep: #002b80;
  --accent-hover: #0044cc;
  --accent-tint: #e7f1ff;
  --card-line: #dfe5ee;
  font-family: bryant-web, system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  margin: 0;
}

/* Subject palettes. --accent-strong is used behind white text, so it stays
   above the 4.5:1 contrast minimum. */
[data-subject="physics"] {
  --accent: #007bff;
  --accent-strong: #0056b3;
  --accent-deep: #002b80;
  --accent-hover: #003f88;
  --accent-tint: #e7f1ff;
}

[data-subject="chemistry"] {
  --accent: #0f9d7a;
  --accent-strong: #0b6e55;
  --accent-deep: #063f33;
  --accent-hover: #084f40;
  --accent-tint: #e3f6f0;
}

[data-subject="biology"] {
  --accent: #3d9a3d;
  --accent-strong: #2a6f2a;
  --accent-deep: #173d17;
  --accent-hover: #1f5a1f;
  --accent-tint: #e9f5e9;
}

[data-subject="maths"] {
  --accent: #7b4fd1;
  --accent-strong: #5f32b0;
  --accent-deep: #2e1a5c;
  --accent-hover: #4a2490;
  --accent-tint: #f0eaff;
}

.bank-top {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 14px 24px;
  background: var(--accent-bar, var(--accent-deep));
  color: #fff;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.15);
}

.bank-logo {
  color: #fff;
  font-weight: 700;
  font-size: 22px;
  text-decoration: none;
  letter-spacing: 0.3px;
}

.subject-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  flex: 1;
}

.subject-tab {
  padding: 6px 12px;
  border-radius: 999px;
  color: #cfe0ff;
  text-decoration: none;
  font-size: 14px;
}

.subject-tab.active {
  background: var(--card);
  color: var(--accent-deep);
  font-weight: 600;
}

.subject-tab.soon {
  opacity: 0.85;
  font-style: italic;
}

.notes-toggle {
  background: var(--accent-strong);
  color: #fff;
  border: 0;
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 15px;
  cursor: pointer;
}

.notes-toggle:hover { background: var(--accent-hover); }

.bank-main {
  max-width: 960px;
  margin: 0 auto;
  padding: 28px 20px 60px;
}

.bank-intro h1 {
  margin: 0 0 8px;
  color: var(--accent-deep);
  font-size: 32px;
}

.bank-intro p {
  margin: 0 0 22px;
  line-height: 1.55;
  color: var(--muted);
}

.search-panel {
  background: var(--card);
  border: 1px solid var(--card-line);
  border-radius: 14px;
  padding: 18px 20px;
  box-shadow: 0 4px 14px rgba(0, 32, 96, 0.10);
  margin-bottom: 24px;
}

.search-label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--accent-deep);
}

.search-input {
  width: 100%;
  box-sizing: border-box;
  padding: 12px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  font-size: 16px;
}

.search-input:focus {
  outline: 3px solid var(--accent-tint);
  border-color: var(--accent);
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.filter-chip {
  border: 1px solid var(--line-strong);
  background: var(--card);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 14px;
  cursor: pointer;
  color: var(--ink);
}

.filter-chip.active {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
  color: #fff;
}

.result-count {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
}

/* Download as PDF: the questions on screen, or their answers. */
.pdf-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin-top: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--card-line);
}

.pdf-label {
  color: var(--accent-deep);
  font-size: 15px;
  font-weight: 600;
}

.pdf-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pdf-btn {
  padding: 7px 14px;
  border: 1.5px solid var(--accent-strong);
  border-radius: 999px;
  background: var(--card);
  color: var(--accent-strong);
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.pdf-btn:hover {
  background: var(--accent-strong);
  color: #fff;
}

/* Progress and "ready" messages while makePdf (js/bank.js) works. */
.pdf-wait {
  position: fixed;
  left: 50%;
  bottom: 24px;
  z-index: 70;
  display: flex;
  align-items: center;
  gap: 10px;
  width: max-content;
  max-width: calc(100vw - 32px);
  transform: translateX(-50%);
  padding: 8px 10px 8px 18px;
  border-radius: 999px;
  background: var(--accent-bar, var(--accent-deep));
  color: #fff;
  font-size: 14px;
  box-shadow: var(--shadow-soft);
}

.pdf-wait-text { padding: 2px 8px 2px 0; }

.pdf-save {
  padding: 7px 16px;
  border: 0;
  border-radius: 999px;
  background: #fff;
  color: var(--accent-bar, var(--accent-deep));
  font: inherit;
  font-weight: 700;
  white-space: nowrap;
  cursor: pointer;
}

.pdf-close {
  flex: none;
  width: 30px;
  height: 30px;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
}

/* The A4 pages makePdf draws into the PDF. They sit off screen, and are always
   black on white, whatever the screen theme. 794 x 1123 px is A4 at 96 px per inch. */
.pdf-render {
  position: fixed;
  top: 0;
  left: -12000px;
  width: 794px;
  color: #111;
  font: 15px/1.6 "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
}

.pdf-page {
  position: relative;
  box-sizing: border-box;
  width: 794px;
  height: 1123px;
  padding: 52px 56px 0;
  background: #fff;
}

.pdf-page-body {
  height: 985px;
  overflow: hidden;
}

/* One question taller than a page: its page grows, and the PDF shrinks it to fit. */
.pdf-page.tall { height: auto; padding-bottom: 90px; }
.pdf-page.tall .pdf-page-body { height: auto; overflow: visible; }

.pdf-foot {
  position: absolute;
  right: 56px;
  bottom: 34px;
  left: 56px;
  display: flex;
  justify-content: space-between;
  padding-top: 6px;
  border-top: 1px solid #ddd;
  color: #666;
  font-size: 12px;
}

.pdf-render .pdf-head { margin-bottom: 4px; padding-bottom: 8px; border-bottom: 2px solid #111; }
.pdf-render .pdf-head h1 { margin: 0 0 2px; color: #111; font-size: 24px; line-height: 1.3; }
.pdf-render .pdf-head p { margin: 0; color: #444; font-size: 13px; }
.pdf-render .pq { padding: 12px 0 16px; border-bottom: 1px solid #d5d5d5; }
.pdf-render .pq-head { display: flex; gap: 10px; align-items: baseline; margin-bottom: 4px; color: #444; font-size: 13px; }
.pdf-render .pq-num { min-width: 1.8em; color: #111; font-size: 17px; font-weight: 700; }
.pdf-render .pq-code { font-weight: 600; }
.pdf-render .pq-marks { margin-left: auto; }
.pdf-render .pq-text,
.pdf-render .pq-answer { margin: 0 0 8px; }
.pdf-render .pq-steps { margin: 4px 0 0; padding-left: 22px; }
.pdf-render .pq-steps li { margin-bottom: 3px; }
.pdf-render .pq-note { margin: 4px 0 0; color: #555; font-size: 13px; font-style: italic; }
.pdf-render .katex { font-size: 1.12em; }

/* A question as printed: slices of its paper page, one under the other. */
.pdf-render .pq-shot { width: 100%; margin: 2px 0; }
.pdf-render .pq-shot canvas { display: block; width: 100%; height: 100%; }

/* Parts that could not be placed on their page: their text, then a box holding
   whatever they need from the paper. */
.pdf-render .pq-box {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: flex-start;
  gap: 12px;
  padding: 12px;
  border: 1.5px solid #1b6080;
  border-radius: 6px;
}

.pdf-render .pq-box img {
  display: block;
  max-width: 100%;
  max-height: 340px;
}

/* Several figures sit side by side where they fit, a little smaller. */
.pdf-render .pq-box.many img { max-height: 270px; }

.paper-head {
  margin: 34px 0 4px;
  color: var(--accent-deep);
  font-size: 22px;
}

.paper-pdf {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--accent-strong);
  font-size: 14px;
}

.q-card {
  background: var(--card);
  border: 1px solid var(--card-line);
  border-radius: 12px;
  padding: 18px 20px;
  margin-bottom: 14px;
  box-shadow: 0 4px 14px rgba(0, 32, 96, 0.08);
}

.q-card.pending {
  background: var(--surface-2);
}

.q-head {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 10px;
  font-size: 13px;
}

.q-code {
  background: var(--accent-bar, var(--accent-deep));
  color: #fff;
  padding: 3px 9px;
  border-radius: 6px;
  font-weight: 600;
}

.q-topic {
  background: var(--accent-tint);
  color: var(--accent-deep);
  padding: 3px 9px;
  border-radius: 6px;
}

.q-marks { color: var(--muted); }

/* Practice questions written by AI, and the checkbox that shows or hides them. */
.q-ai {
  padding: 3px 9px;
  border: 1px dashed var(--accent-strong);
  border-radius: 6px;
  color: var(--accent-strong);
  font-weight: 600;
}

.ai-toggle {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
  align-items: center;
  margin: 10px 0 4px;
  color: var(--text, inherit);
  font-size: 15px;
  cursor: pointer;
}

.ai-toggle input { width: 18px; height: 18px; accent-color: var(--accent-strong); }
.ai-toggle-note { color: var(--muted); font-size: 13px; }

.q-text {
  margin: 0 0 14px;
  line-height: 1.6;
  font-size: 16px;
}

.q-pending {
  margin: 0;
  color: var(--muted);
  font-style: italic;
}

.reveal-btn {
  background: var(--card);
  color: var(--accent-strong);
  border: 1.5px solid var(--accent-strong);
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 15px;
  cursor: pointer;
}

.reveal-btn:hover {
  background: var(--accent-strong);
  color: #fff;
}

.answer-block {
  margin-top: 14px;
  padding: 14px 16px;
  background: var(--accent-tint);
  border-radius: 10px;
}

.answer-block[hidden] { display: none; }

.final-answer {
  margin: 0 0 10px;
  color: var(--accent-deep);
}

.steps {
  margin: 0;
  padding-left: 22px;
  line-height: 1.6;
}

.steps li { margin-bottom: 6px; }

.empty {
  color: var(--muted);
  padding: 24px 0;
}

/* ---------- Notes drawer (slides in from the right) ---------- */
.notes-drawer {
  position: fixed;
  top: 0;
  right: 0;
  height: 100vh;
  width: min(380px, 92vw);
  background: var(--accent-bar, var(--accent-deep));
  color: #fff;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(.2, .9, .2, 1);
  z-index: 60;
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.25);
  display: flex;
  flex-direction: column;
}

.notes-drawer.open { transform: translateX(0); }

.drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.drawer-head h2 {
  margin: 0;
  font-size: 20px;
}

.drawer-close {
  background: none;
  border: 0;
  color: #fff;
  font-size: 28px;
  cursor: pointer;
  line-height: 1;
}

.drawer-body {
  overflow-y: auto;
  padding: 10px 14px 30px;
}

.drawer-unit {
  margin: 18px 6px 6px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #9fbcf0;
}

.drawer-link {
  display: block;
  padding: 10px 12px;
  border-radius: 8px;
  color: #fff;
  text-decoration: none;
}

.drawer-link:hover { background: rgba(255, 255, 255, 0.1); }

.drawer-link-title {
  display: block;
  font-weight: 600;
}

.drawer-link-blurb {
  display: block;
  font-size: 13px;
  color: #cfe0ff;
  margin-top: 2px;
}

.drawer-scrim {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 55;
}

@media (max-width: 640px) {
  .bank-top { flex-wrap: wrap; gap: 10px; padding: 12px 16px; }
  .subject-tabs { order: 3; flex: 0 0 100%; }
  .notes-toggle { margin-left: auto; }
  .bank-main { padding: 20px 16px 50px; }
  .bank-intro h1 { font-size: 26px; }
}

/* ---------- Grouped topic panel: broad topics with a subtopic arrow ---------- */
.filter-row {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 8px;
  align-items: start;
}

.filter-row > .filter-chip {
  justify-self: start;
}

.topic-group {
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--card);
  overflow: hidden;
}

.topic-group.open {
  grid-column: 1 / -1;
}

.topic-row {
  display: flex;
  align-items: stretch;
}

.topic-pick,
.sub-chip {
  flex: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  border: 0;
  background: transparent;
  padding: 9px 12px;
  font-size: 14px;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}

.topic-pick:hover,
.sub-chip:hover {
  background: var(--accent-tint);
}

.topic-pick.active,
.sub-chip.active {
  background: var(--accent-strong);
  color: #fff;
}

.topic-pick.active .topic-count,
.sub-chip.active .topic-count {
  background: rgba(255, 255, 255, 0.25);
  color: #fff;
}

/* Some, not all, of this topic's subtopics are picked. */
.topic-pick.partial {
  background: var(--accent-tint);
  color: var(--accent-deep);
  font-weight: 600;
}

.topic-pick.partial .topic-count {
  background: var(--accent-strong);
  color: #fff;
}

.topic-count {
  flex: none;
  font-size: 12px;
  color: var(--muted);
  background: var(--surface-2);
  border-radius: 999px;
  padding: 2px 8px;
}

.topic-arrow {
  flex: none;
  width: 40px;
  border: 0;
  border-left: 1px solid var(--line-strong);
  background: transparent;
  color: var(--accent-strong);
  font-size: 20px;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.topic-arrow:hover {
  background: var(--accent-tint);
}

.topic-group.open .topic-arrow {
  transform: rotate(90deg);
}

.sub-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  border-top: 1px solid var(--line-strong);
}

.sub-chip {
  border-top: 1px solid var(--surface-2);
}

.topic-group.open .sub-list .sub-chip:nth-child(odd) {
  border-right: 1px solid var(--surface-2);
}

/* ---------- View bar, done and review controls ---------- */
.view-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 16px;
}

.view-tab {
  border: 1.5px solid var(--accent-strong);
  background: var(--card);
  color: var(--accent-strong);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 14px;
  cursor: pointer;
}

.view-tab.active {
  background: var(--accent-strong);
  color: #fff;
}

.view-tab-end {
  margin-left: auto;
  border-color: var(--muted);
  color: var(--ink-2);
}

.view-tab-end.active {
  background: #3d4652;
  border-color: #3d4652;
  color: #fff;
}

.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.action-btn {
  background: var(--card);
  color: var(--ink-2);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 13px;
  cursor: pointer;
}

.action-btn:hover {
  background: var(--surface-2);
}

.action-btn.on {
  background: var(--surface-2);
  border-color: var(--accent-strong);
  color: var(--accent-strong);
}

.q-card.done {
  opacity: 0.6;
}

.q-done-tag {
  background: #2a7a3b;
  color: #fff;
  padding: 3px 9px;
  border-radius: 6px;
}

/* ---------- Question image drop-down ---------- */
.q-image {
  margin: 0 0 12px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--surface-2);
}

/* A diagram cropped from the paper, shown with the question. Scans stay on white. */
.q-figure {
  margin: 0 0 12px;
  padding: 8px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: #fff;
}

.q-figure img {
  display: block;
  max-width: 100%;
  max-height: 420px;
  margin: 0 auto 6px;
}

.q-figure figcaption {
  color: #5b6573;
  font-size: 12.5px;
  text-align: center;
}

/* Earlier parts of the same question, collapsed under a later part (earlierParts in js/bank.js). */
.q-context {
  margin: 0 0 12px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--surface-2);
}

.q-context > summary {
  padding: 8px 12px;
  color: var(--accent-strong);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.q-context-part {
  padding: 2px 14px 10px;
  border-top: 1px solid var(--line-strong);
}

.q-context-no {
  margin: 8px 0 2px;
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 600;
}

.q-context-text,
.q-context-answer {
  margin: 0 0 4px;
  font-size: 14.5px;
  line-height: 1.6;
}

.q-context-answer { color: var(--accent-deep); }

.q-image summary {
  cursor: pointer;
  padding: 9px 14px;
  font-size: 14px;
  color: var(--accent-strong);
  font-weight: 600;
}

.q-image[open] summary {
  border-bottom: 1px solid var(--line-strong);
}

.q-image-page {
  display: block;
  width: 100%;
  height: auto;
  margin: 10px auto;
  max-width: 720px;
  background: var(--card);
}

/* ---------- Landing page ---------- */
.landing-hero {
  max-width: 960px;
  margin: 0 auto;
  padding: 44px 20px 10px;
}

.landing-hero h1 {
  margin: 0 0 10px;
  font-size: 40px;
  color: var(--accent-deep);
  letter-spacing: -0.5px;
}

.landing-hero p {
  margin: 0;
  max-width: 640px;
  font-size: 18px;
  line-height: 1.55;
  color: var(--ink-2);
}

.subject-grid {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 20px 40px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 16px;
}

.subject-card {
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--card-line);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 4px 14px rgba(0, 32, 96, 0.08);
}

.subject-card header {
  background: var(--accent-bar, var(--accent-deep));
  color: #fff;
  padding: 18px 18px 16px;
}

.subject-card h2 {
  margin: 0;
  font-size: 22px;
}

.subject-card header p {
  margin: 6px 0 0;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.4;
}

.subject-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 18px 18px;
  margin-top: auto;
}

.subject-links a {
  display: block;
  text-align: center;
  text-decoration: none;
  border-radius: 8px;
  padding: 9px 12px;
  font-size: 15px;
  font-weight: 600;
  border: 1.5px solid var(--accent-strong);
  color: var(--accent-strong);
}

.subject-links a.primary {
  background: var(--accent-strong);
  color: #fff;
}

.subject-links a:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #fff;
}

.landing-note {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px 50px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
}

@media (max-width: 640px) {
  .landing-hero h1 { font-size: 32px; }
  .landing-hero p { font-size: 16px; }
}

/* "Pick up where you left off" (js/landing.js): the last topic and question used in the
   question bank, in that subject's colours. */
.resume {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 20px;
  box-sizing: border-box;
  width: calc(100% - 40px);
  max-width: 960px;   /* the same column as the heading and the subject cards */
  margin: 22px auto 0;
  padding: 16px 20px;
  background: var(--card);
  border: 1px solid var(--card-line);
  border-radius: 14px;
  box-shadow: 0 4px 14px rgba(0, 32, 96, 0.08);
}
.resume[hidden] { display: none; }
.resume-text { flex: 1 1 320px; min-width: 0; }
.resume h2 { margin: 0 0 4px; font-size: 18px; color: var(--accent-deep); }
.resume p { margin: 0; color: var(--ink-2); font-size: 14.5px; line-height: 1.5; overflow-wrap: anywhere; }
.resume-go {
  flex: none;
  padding: 10px 22px;
  border-radius: 8px;
  background: var(--accent-strong);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
}
.resume-go:hover { background: var(--accent-hover); }
.resume-go:focus-visible { outline: 3px solid var(--accent-tint); outline-offset: 2px; }

/* Questions done in a subject, under its card's heading. */
.subject-progress { padding: 14px 18px 0; }
.subject-progress[hidden] { display: none; }
.subject-progress p { margin: 0 0 6px; color: var(--ink-2); font-size: 14px; font-weight: 600; }
.subject-progress-bar { height: 8px; overflow: hidden; border-radius: 999px; background: var(--accent-tint); }
.subject-progress-bar span { display: block; height: 100%; border-radius: inherit; background: var(--accent); }

@media (max-width: 640px) {
  .resume { width: calc(100% - 32px); padding: 14px 16px; }
  .resume-go { flex: 1 1 100%; text-align: center; min-height: 44px; box-sizing: border-box; display: flex; align-items: center; justify-content: center; }
}

/* ---------- Formatted maths and formulas ---------- */
.q-card sup,
.q-card sub {
  font-size: 0.72em;
  line-height: 0;
}

.q-card .rad {
  border-top: 1px solid currentColor;
  padding: 1px 1px 0;
  margin-left: 1px;
}

/* Maths and physics are typeset by KaTeX (js/mathtex.js, js/format.js). The serif
   maths runs a little larger than the sans-serif text around it so the two read
   at the same size, and lines get room for stacked fractions. */
.q-card .katex {
  font-size: 1.12em;
}

.q-card .q-text,
.q-card .steps,
.q-card .final-answer {
  line-height: 1.75;
}

/* ---------- Show more ---------- */
.show-more {
  display: block;
  width: 100%;
  margin: 8px 0 24px;
  padding: 12px;
  border: 1.5px dashed var(--accent-strong);
  border-radius: 12px;
  background: var(--card);
  color: var(--accent-strong);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}

.show-more:hover {
  background: var(--accent-tint);
}

.q-mcq-note {
  margin: -6px 0 8px;
  font-size: 13px;
  color: var(--accent-strong);
  font-weight: 600;
}

/* ---------- Dark mode (the shared dark colours are in styles.css) ----------
   --accent-deep turns light because it is mostly used for text; the header,
   badges and drawer keep a dark bar colour through --accent-bar. */
:root[data-theme="dark"] .bank {
  --card-line: #273246;
  --accent-deep: #b4cdff;
  --accent-bar: #002b80;
  --accent-tint: #18263f;
}

:root[data-theme="dark"] [data-subject="physics"] {
  --accent: #4c8dff;
  --accent-strong: #3b7ff0;
  --accent-deep: #b4cdff;
  --accent-bar: #002b80;
  --accent-hover: #2f6fd6;
  --accent-tint: #18263f;
}

:root[data-theme="dark"] [data-subject="chemistry"] {
  --accent: #1fb38c;
  --accent-strong: #14936f;
  --accent-deep: #a6ebd7;
  --accent-bar: #063f33;
  --accent-hover: #0f7a5c;
  --accent-tint: #0f2c26;
}

:root[data-theme="dark"] [data-subject="biology"] {
  --accent: #4cae4c;
  --accent-strong: #3c943c;
  --accent-deep: #bfe8bf;
  --accent-bar: #173d17;
  --accent-hover: #2f7a2f;
  --accent-tint: #162d18;
}

:root[data-theme="dark"] [data-subject="maths"] {
  --accent: #9672ec;
  --accent-strong: #8358e6;
  --accent-deep: #d8c8ff;
  --accent-bar: #2e1a5c;
  --accent-hover: #6d43cf;
  --accent-tint: #251b40;
}

/* Pages from the paper are scans on white; keep them as they are. */
:root[data-theme="dark"] .q-image-page { background: #fff; }

/* Mark-scheme style answers: a label over the marking points and over the other
   points that would also earn credit. */
.steps-label {
  margin: 10px 0 2px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.steps.accept { list-style: disc; }
.pdf-render .pq-label { margin: 6px 0 0; color: #555; font-size: 12px; font-weight: 700; }