/* ─── Google Fonts ───────────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;700&display=swap');

/* ─── CSS Variables ──────────────────────────────────────────────────────── */
:root {
  --brand:   #554f4d;
  --red:     #d92b2b;
  --green:   #28a745;
  --bg-gray: #f6f5f5;
  --text:    #333333;
  --shadow:  0px 3px 6px 3px rgba(0,0,0,0.06);

  /* Question type colors */
  --ce: #4a90d9;
  --cr: #e67e22;
  --pa: #27ae60;
  --id: #8e44ad;
}

/* ─── Base ───────────────────────────────────────────────────────────────── */
* { box-sizing: border-box; }

body {
  font-family: 'Inter', sans-serif;
  font-size: 18px;
  color: var(--text);
  background: #fff;
  margin: 0;
  padding: 0;
}

h1 { font-size: 42px; font-weight: 700; }
h2 { font-size: 32px; font-weight: 700; }
h3 { font-size: 22px; font-weight: 700; }

a { color: var(--brand); }
a:hover { color: var(--red); text-decoration: none; }

/* ─── Section Layout ─────────────────────────────────────────────────────── */
section { padding: 72px 0; background: #fff; }
section.bg-gray { background: var(--bg-gray); }

.section-title {
  text-align: center;
  margin-bottom: 48px;
}
.section-title h2 {
  margin-bottom: 12px;
}
.section-title .title-bar {
  display: block;
  width: 70px;
  height: 2px;
  background: var(--brand);
  margin: 0 auto;
}

/* ─── Navbar ─────────────────────────────────────────────────────────────── */
#main-nav {
  background: rgba(255,255,255,0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  box-shadow: none;
  transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  padding: 10px 0;
}
#main-nav.scrolled {
  background: rgba(255,255,255,0.97);
  border-bottom-color: rgba(0,0,0,0.08);
  box-shadow: 0 2px 16px rgba(0,0,0,0.08);
}
#main-nav .navbar-brand {
  font-weight: 700;
  font-size: 20px;
  color: var(--brand);
  letter-spacing: 0.3px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.nav-logo {
  width: 22px;
  height: 22px;
  border-radius: 5px;
  display: block;
  flex-shrink: 0;
}
#main-nav .nav-link {
  color: #444 !important;
  font-size: 14px;
  font-weight: 500;
  padding: 6px 4px !important;
  margin: 0 10px;
  position: relative;
  transition: color 0.2s;
}
#main-nav .nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  right: 50%;
  height: 2px;
  background: var(--brand);
  border-radius: 2px;
  transition: left 0.25s ease, right 0.25s ease;
}
#main-nav .nav-link:hover { color: var(--brand) !important; }
#main-nav .nav-link:hover::after { left: 0; right: 0; }
#main-nav .navbar-toggler {
  border: none;
  padding: 4px 6px;
}
#main-nav .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='28' height='28' viewBox='0 0 28 28'%3e%3cpath stroke='%23444' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h20M4 14h20M4 21h20'/%3e%3c/svg%3e");
}

/* ─── CaST underline in subtitle ────────────────────────────────────────── */
.cast-u {
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 2px;
  text-decoration-color: rgba(85,79,77,0.5);
  cursor: help;
}

/* ─── Hero ───────────────────────────────────────────────────────────────── */
#hero {
  background: #fff;
  color: var(--text);
  padding: 110px 0 72px;
  text-align: center;
  border-bottom: 1px solid #eee;
}
#hero h1 { font-size: 48px; margin-bottom: 14px; color: var(--brand); }
#hero .hero-subtitle {
  font-size: 26px;
  font-weight: 500;
  color: #444;
  margin-bottom: 10px;
  line-height: 1.5;
}
.title-break {
  display: block;
}
.nowrap {
  white-space: nowrap;
}
.cvpr-badge {
  display: inline-flex;
  align-items: center;
  gap: 0;
  background: none;
  border: none;
  margin-bottom: 10px;
  margin-left: 0;
  padding: 0;
  font-size: 13px;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--brand);
}
.cvpr-badge .cvpr-name {
  font-weight: 700;
  padding-right: 10px;
}
.cvpr-badge .cvpr-divider {
  width: 1px;
  height: 13px;
  background: rgba(85,79,77,0.35);
  display: inline-block;
  flex-shrink: 0;
}
.cvpr-badge .cvpr-year {
  font-weight: 300;
  padding-left: 10px;
  opacity: 0.75;
}
.authors {
  font-size: 16px;
  margin-bottom: 6px;
  color: #444;
}
.affiliations {
  font-size: 14px;
  color: #888;
  margin-bottom: 28px;
}
/* Link buttons */
.hero-links .btn-outline-brand {
  border-radius: 30px;
  border: 2px solid var(--brand);
  color: var(--brand);
  background: transparent;
  font-size: 15px;
  padding: 7px 22px;
  margin: 4px 6px;
  transition: all 0.2s;
  display: inline-block;
  text-decoration: none;
}
.hero-links .btn-outline-brand:hover:not(.disabled) {
  background: var(--brand);
  color: #fff;
  text-decoration: none;
}
.btn-venue {
  font-size: 11px;
  font-weight: 600;
  margin-left: 4px;
  color: #2563eb;
}
.hero-links .btn-outline-brand.disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}
/* Overview figure */
.overview-figure {
  margin-top: 48px;
}
.overview-figure img {
  width: 100%;
}
.overview-caption {
  font-size: 14px;
  color: #888;
  margin-top: 12px;
  font-style: italic;
}

/* ─── Abstract ───────────────────────────────────────────────────────────── */
#abstract p {
  font-size: 17px;
  line-height: 1.8;
  max-width: 860px;
  margin: 0 auto;
  text-align: justify;
}

/* ─── Dataset Samples ────────────────────────────────────────────────────── */
/* ── Thumbnail strip ─────────────────────────────────────────────────────── */
#demo-strip {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  margin-bottom: 20px;
  scrollbar-width: thin;
  scrollbar-color: #ddd transparent;
  justify-content: center;
}
#demo-strip::-webkit-scrollbar { height: 4px; }
#demo-strip::-webkit-scrollbar-track { background: transparent; }
#demo-strip::-webkit-scrollbar-thumb { background: #ddd; border-radius: 2px; }

.strip-thumb {
  flex-shrink: 0;
  width: 80px;
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  border: 2px solid transparent;
  transition: border-color 0.15s, transform 0.15s, box-shadow 0.15s;
  background: #000;
  position: relative;
}
.strip-thumb img,
.strip-thumb canvas {
  width: 100%;
  aspect-ratio: 1;
  display: block;
  object-fit: cover;
}
.strip-thumb:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.18);
}
.strip-thumb.active {
  border-color: var(--accent, #3a7ab8);
  box-shadow: 0 4px 14px rgba(58,122,184,0.35);
}
.strip-thumb::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 40px; height: 40px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Ccircle cx='50' cy='50' r='46' fill='white' fill-opacity='0.80'/%3E%3Cpath d='M40 32 L40 68 L72 50 Z' fill='%23222' stroke='%23222' stroke-width='6' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
  pointer-events: none;
  transition: transform 0.15s, opacity 0.15s;
}
.strip-thumb:hover::after { transform: translate(-50%, -50%) scale(1.12); opacity: 0.95; }
.strip-thumb.active::after { opacity: 1; }
.strip-thumb-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  font-size: 9px;
  font-weight: 700;
  text-align: center;
  padding: 3px 2px;
  background: rgba(0,0,0,0.52);
  color: #fff;
  letter-spacing: 0.3px;
  line-height: 1.2;
  display: none;
}
.cast-debug .strip-thumb-label { display: none; }

.demo-panel {
  background: #fff;
  border-radius: 12px;
  box-shadow: var(--shadow);
  overflow: visible;
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  align-items: center;
}
.demo-video-col {
  padding: 0;
  flex: 0 0 50%;
  max-width: 50%;
  overflow: hidden;
}
.demo-video-col video {
  width: 100%;
  aspect-ratio: 1;
  display: block;
  background: #000;
  border-radius: 12px 0 0 12px;
}
#demo-debug-label {
  display: none;
  font-size: 11px;
  font-family: monospace;
  color: #888;
  text-align: center;
  padding: 6px 0 2px;
}
.cast-debug #demo-debug-label { display: block; }
.demo-info-col {
  flex: 0 0 50%;
  max-width: 50%;
  padding: 28px 40px 28px 48px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  border-left: 1px solid #eee;
}

@media (max-width: 767px) {
  .demo-video-col { flex: 0 0 100%; max-width: 100%; }
  .demo-video-col video { border-radius: 12px 12px 0 0; }
  .demo-info-col {
    flex: 0 0 100%;
    max-width: 100%;
    border-left: none;
    border-top: 1px solid #eee;
    padding: 24px 24px;
  }
}

/* Question type badge */
.qtype-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 20px;
  letter-spacing: 0.4px;
}
.qtype-CE { background: none; color: #3a7ab8; border: 1px solid rgba(74,144,217,0.5); }
.qtype-CR { background: none; color: #c06818; border: 1px solid rgba(230,126,34,0.5); }
.qtype-PA { background: none; color: #1e8c4e; border: 1px solid rgba(39,174,96,0.5); }
.qtype-ID { background: none; color: #7a34a8; border: 1px solid rgba(142,68,173,0.5); }

.demo-question {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  margin: 0;
}
.demo-answer-block {
  background: var(--bg-gray);
  border-left: 4px solid #bbb;
  border-radius: 0 6px 6px 0;
  padding: 10px 14px;
  font-size: 15px;
}
.demo-answer-block .answer-label {
  font-size: 12px;
  font-weight: 700;
  color: #888;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 3px;
}

/* Evidence list */
.evidence-list { display: flex; flex-direction: column; gap: 8px; }
.evidence-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 9px 12px;
  background: #fff;
  border: 1px solid #e8e8e8;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  font-size: 14px;
}
.evidence-item:hover { background: #f8f8f8; border-color: #ccc; }
.evidence-item .ev-pill {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 9px;
  border-radius: 12px;
  color: #fff;
  white-space: nowrap;
  flex-shrink: 0;
}
.evidence-item .ev-time {
  font-size: 12px;
  color: #888;
  white-space: nowrap;
  flex-shrink: 0;
  margin-top: 1px;
}
.evidence-item .ev-rationale {
  line-height: 1.4;
  color: var(--text);
}

/* Evidence bbox summary line */
.ev-bbox-line {
  font-size: 11px;
  color: #999;
  font-family: 'Courier New', monospace;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 4px;
  max-width: 100%;
}

/* Show Wrong Options — hover popover */
.show-options-wrap {
  position: relative;
  align-self: flex-start;
}
.btn-show-options-hover {
  display: inline-block;
  border: 1.5px solid #ccc;
  color: #888;
  border-radius: 30px;
  padding: 5px 14px;
  font-size: 12px;
  cursor: pointer;
  user-select: none;
  background: none;
  transition: border-color 0.2s, color 0.2s;
}
.btn-show-options-hover:hover { border-color: #aaa; color: #555; }
.options-popover {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  z-index: 200;
  cursor: default;
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 10px;
  box-shadow: 0 6px 24px rgba(0,0,0,0.13);
  padding: 12px;
  min-width: 500px;
  max-width: 600px;
  max-height: 320px;
  overflow-y: auto;
  flex-direction: column;
  gap: 6px;
}
.btn-show-options-hover.open .options-popover {
  display: flex;
}
.option-item {
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 13px;
  line-height: 1.4;
}
.option-correct {
  background: #eafaf0;
  border-left: 4px solid var(--green);
  color: #1a6930;
  font-weight: 700;
}
.option-wrong {
  background: #fdf0f0;
  border-left: 4px solid var(--red);
  color: #7a1a1a;
}

/* ─── Task Definition ────────────────────────────────────────────────────── */
#task .task-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
}

/* Shared box style */
.task-box {
  background: #fff;
  border: 2px solid var(--brand);
  border-radius: 10px;
  padding: 18px 20px;
  box-shadow: var(--shadow);
  height: 100%;
}
.task-box h5 {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--brand);
  margin-bottom: 12px;
}
.task-box p { font-size: 13px; line-height: 1.5; margin: 0; }

/* Column widths */
.task-col { display: flex; flex-direction: column; }
.task-input-col  { min-width: 150px; max-width: 170px; }

/* Horizontal arrow between input and output */
.task-arrow-h {
  display: flex;
  align-items: center;
  padding: 0 8px;
  color: var(--brand);
  font-size: 24px;
  flex-shrink: 0;
}

/* Col 2: outputs stacked vertically */
.task-outputs-col {
  flex: 0 0 260px;
  max-width: 280px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.task-outputs-col .task-box { flex: 0 0 auto; }

/* Right group: stretches internally so brace can fill full height */
.task-right-group {
  display: flex;
  align-items: stretch;
  margin-left: 20px;
}

/* Col 3: per-output metrics */
.task-metrics-col {
  flex: 0 0 200px;
  max-width: 210px;
  display: flex;
  flex-direction: column;
}

/* Brace between metrics col and combined col */
.task-brace-col {
  display: flex;
  align-items: stretch;
  padding: 0 4px;
  flex-shrink: 0;
}
.task-brace-svg {
  width: 20px;
  height: 100%;
  min-height: 80px;
  display: block;
}

/* Col 4: combined metrics */
.task-combined-col {
  flex: 0 0 175px;
  max-width: 185px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* Chain evidence blocks (no arrows, no dividers) */
.chain-evidence {
  background: var(--bg-gray);
  border-left: 4px solid var(--brand);
  border-radius: 0 8px 8px 0;
  padding: 10px 14px;
  margin-bottom: 8px;
  font-size: 13px;
}
.chain-evidence:last-of-type { margin-bottom: 0; }
.chain-evidence h6 {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--brand);
  margin-bottom: 5px;
}
.chain-evidence .ev-detail {
  display: flex;
  gap: 6px;
  align-items: baseline;
  margin-bottom: 3px;
  color: #555;
  font-size: 12px;
}
.chain-evidence .ev-icon { width: 14px; text-align: center; flex-shrink: 0; }

/* Final answer box interior */
.task-answer-box { display: flex; flex-direction: column; justify-content: center; }
.answer-box-inner {
  background: var(--bg-gray);
  color: var(--text);
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 13px;
  font-weight: 700;
  text-align: center;
}

.metrics-combined-note {
  font-size: 11px;
  color: #999;
  margin: -4px 0 8px;
  font-style: italic;
}
.metric-combined .metric-name { color: var(--red); }

.metrics-group-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #888;
  margin-bottom: 8px;
}
.metrics-list-flat {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.metric-flat-item {
  background: var(--bg-gray);
  border-radius: 8px;
  padding: 9px 12px;
  font-size: 12px;
}
.metric-flat-item .metric-name {
  font-weight: 700;
  color: var(--brand);
  display: block;
  margin-bottom: 2px;
}
.metric-flat-item .metric-desc {
  color: #666;
  line-height: 1.4;
}

/* Task mobile */
@media (max-width: 767px) {
  #task .task-diagram {
    flex-direction: column;
    align-items: center;
    gap: 8px;
  }
  .task-arrow-h { transform: rotate(90deg); padding: 4px 0; align-items: center; }
  .task-input-col { max-width: 100%; width: 100%; }
  .task-outputs-col { width: 100%; min-width: 0; flex: none; max-width: 100%; }
  .task-right-group {
    flex-direction: column;
    align-items: stretch;
    margin-left: 0;
    width: 100%;
  }
  .task-metrics-col, .task-combined-col {
    width: 100%; min-width: 0; flex: none; max-width: 100%;
  }
  .task-brace-col { display: none; }
}

/* ─── Question Taxonomy ──────────────────────────────────────────────────── */
.qtype-card {
  background: #fff;
  border-radius: 10px;
  box-shadow: var(--shadow);
  padding: 22px 20px;
  height: 100%;
  border-left: 5px solid transparent;
  transition: transform 0.2s;
}
.qtype-card:hover { transform: translateY(-3px); }
.qtype-card h4 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.qtype-card p { font-size: 15px; margin: 0; color: #555; }
.qtype-card.ce { border-color: var(--ce); }
.qtype-card.cr { border-color: var(--cr); }
.qtype-card.pa { border-color: var(--pa); }
.qtype-card.id { border-color: var(--id); }
.qtype-card.ce h4 { color: var(--ce); }
.qtype-card.cr h4 { color: var(--cr); }
.qtype-card.pa h4 { color: var(--pa); }
.qtype-card.id h4 { color: var(--id); }

.taxonomy-figures img {
  width: 100%;
}
.taxonomy-figures .fig-caption {
  text-align: center;
  font-size: 13px;
  color: #666;
  margin-top: 8px;
}

/* ─── Leaderboard ────────────────────────────────────────────────────────── */
.leaderboard-wrapper {
  overflow-x: auto;
  border-radius: 12px;
  border: 1px solid #e8e6e5;
}
#leaderboard-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  min-width: 700px;
}
#leaderboard-table thead th {
  background: #faf9f8;
  color: #555;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 12px 16px;
  text-align: center;
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
  position: relative;
  border-bottom: 1px solid #e8e6e5;
}
#leaderboard-table thead th:first-child { text-align: left; cursor: default; }
#leaderboard-table .th-group-label {
  text-align: center;
  font-size: 11px;
  font-weight: 700;
  color: #888;
  letter-spacing: 0.6px;
  border-bottom: 1px solid #e8e6e5;
  cursor: default;
  padding-bottom: 6px;
}
#leaderboard-table .th-group-label:hover { background: #faf9f8; color: #888; }
#leaderboard-table .thead-group-row th { border-bottom: none; padding-bottom: 4px; }
#leaderboard-table thead th:hover:not(:first-child) { background: #f0eeec; color: var(--brand); }
#leaderboard-table thead th .th-inner {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  justify-content: center;
}
#leaderboard-table thead th .sort-icon {
  font-size: 10px;
  opacity: 0.35;
}
#leaderboard-table thead th.sorted-asc .sort-icon,
#leaderboard-table thead th.sorted-desc .sort-icon { opacity: 1; color: var(--brand); }

/* Group header rows */
#leaderboard-table tr.group-header td {
  background: #fff;
  font-weight: 700;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding: 10px 16px 6px;
  color: #aaa;
  border-top: 1px solid #e8e6e5;
}
#leaderboard-table tr.group-header:first-child td { border-top: none; }

/* Data rows */
#leaderboard-table tr.group-proprietary td,
#leaderboard-table tr.group-opensource td {
  background: #fff;
}
#leaderboard-table tbody tr:hover td { background: #faf9f8; }
#leaderboard-table td {
  padding: 11px 16px;
  text-align: center;
  border-bottom: 1px solid #f0eeec;
  font-size: 14px;
  color: #333;
}
#leaderboard-table tbody tr:last-child td { border-bottom: none; }
#leaderboard-table td:first-child { text-align: left; font-weight: 600; color: #222; }
#leaderboard-table td.best { font-weight: 700; color: var(--brand); }

/* Tooltip for column headers */
[data-tooltip] { position: relative; }
[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: #222;
  color: #fff;
  font-size: 12px;
  font-weight: 400;
  white-space: nowrap;
  padding: 5px 10px;
  border-radius: 5px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s;
  z-index: 100;
  max-width: 280px;
  white-space: normal;
  text-align: center;
  line-height: 1.4;
}
[data-tooltip]:hover::after { opacity: 1; }

/* ─── BibTeX ─────────────────────────────────────────────────────────────── */
.bibtex-wrapper {
  position: relative;
  background: #f5f4f3;
  border: 1px solid #ddd;
  border-radius: 10px;
  padding: 28px 28px 24px;
  max-width: 800px;
  margin: 0 auto;
  box-shadow: var(--shadow);
}
.bibtex-wrapper pre {
  margin: 0;
  color: #333;
  font-family: 'Courier New', monospace;
  font-size: 14px;
  line-height: 1.6;
  white-space: pre;
  overflow-x: auto;
}
.btn-copy {
  position: absolute;
  top: 14px;
  right: 14px;
  background: transparent;
  color: #888;
  border: 1.5px solid #ccc;
  border-radius: 20px;
  padding: 4px 14px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.btn-copy:hover { background: var(--brand); color: #fff; border-color: var(--brand); }


/* ─── Responsive Tweaks ──────────────────────────────────────────────────── */
@media (max-width: 991px) {
  body { font-size: 16px; }
  h1 { font-size: 36px; }
  h2 { font-size: 26px; }
  #hero h1 { font-size: 36px; }
  section { padding: 56px 0; }
}

@media (max-width: 767px) {
  body { font-size: 15px; }
  h1 { font-size: 28px; }
  h2 { font-size: 22px; }
  section { padding: 44px 0; }

  /* Navbar left padding on small screens */
  #main-nav .container { padding-left: 16px; padding-right: 16px; }

  /* Hero */
  #hero { padding: 80px 0 48px; }
  #hero h1 { font-size: 28px; }
  #hero .hero-subtitle { font-size: 18px; }
  .title-break { display: inline; }
  .authors { font-size: 14px; }
  .affiliations { font-size: 13px; }
  .hero-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; }
  .hero-links .btn-outline-brand { font-size: 13px; padding: 6px 16px; margin: 0; }

  /* Demo thumbnail strip */
  .strip-thumb { width: 64px; }

  /* Options popover — prevent overflow on small screens */
  .show-options-wrap {
    width: 100%;
  }
  .options-popover {
    min-width: 0;
    width: 100%;
    left: 0;
    transform: none;
  }

  /* Leaderboard */
  #leaderboard-table { font-size: 12px; }
  #leaderboard-table thead th { padding: 10px 8px; font-size: 11px; }
  #leaderboard-table td { padding: 9px 8px; font-size: 12px; }

  /* BibTeX */
  .bibtex-wrapper { padding: 20px 16px 16px; }
  .bibtex-wrapper pre { font-size: 12px; }
}

/* ── Dataset Construction ─────────────────────────────────────────────── */
.pipeline-figure {
  text-align: center;
  margin-top: 32px;
}
.pipeline-figure img {
  max-width: 100%;
  border-radius: 10px;
}
.pipeline-figure .fig-caption {
  margin-top: 14px;
  font-size: 14px;
  color: #888;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}