/* ============================================================
   WorldReasonBench project page
   - Minimal, dynamic, dark-accent academic style
   ============================================================ */

:root {
  --bg: #fafbff;
  --bg-soft: #f0f3fb;
  --surface: #ffffff;
  --surface-2: #f7f8fc;
  --border: #e3e6ee;
  --border-strong: #c8cdde;
  --text: #1a1d2e;
  --text-soft: #4a5072;
  --text-mute: #777e9a;
  --primary: #4f46e5;
  --primary-soft: #6366f1;
  --primary-deep: #312e81;
  --accent: #f59e0b;
  --accent-soft: #fbbf24;
  --silver: #c0c5d6;
  --closed: #6366f1;
  --open: #14b8a6;
  --shadow-sm: 0 2px 8px rgba(20, 24, 56, 0.06);
  --shadow-md: 0 8px 24px rgba(20, 24, 56, 0.08);
  --shadow-lg: 0 24px 48px rgba(20, 24, 56, 0.12);
  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 22px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color 0.18s; }
a:hover { color: var(--primary-deep); }

/* ============================================================
   TOP NAV
   ============================================================ */
.topnav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  backdrop-filter: blur(14px) saturate(180%);
  -webkit-backdrop-filter: blur(14px) saturate(180%);
  background: rgba(250, 251, 255, 0.78);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s, background 0.25s;
}
.topnav.scrolled { border-color: var(--border); background: rgba(250, 251, 255, 0.92); }
.nav-inner {
  max-width: 1200px; margin: 0 auto; padding: 14px 28px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 16px; color: var(--text);
}
.brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--primary), var(--primary-soft));
  color: white; font-size: 13px; font-weight: 800; letter-spacing: -0.5px;
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.28);
}
.nav-links {
  display: flex; gap: 28px; list-style: none; margin: 0; padding: 0;
}
.nav-links a {
  color: var(--text-soft); font-weight: 500; font-size: 14px;
  position: relative; padding: 4px 0;
}
.nav-links a::after {
  content: ''; position: absolute; left: 0; bottom: -2px;
  height: 2px; width: 0; background: var(--primary);
  transition: width 0.25s ease;
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { width: 100%; }

@media (max-width: 800px) {
  .nav-links { display: none; }
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative; isolation: isolate;
  padding: 130px 28px 80px;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; z-index: -1;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(99, 102, 241, 0.10), transparent 70%),
              linear-gradient(180deg, #fafbff 0%, #ffffff 100%);
}
.hero-glow {
  position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.45;
  animation: float 16s ease-in-out infinite;
}
.glow-a {
  width: 540px; height: 540px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.55), transparent 70%);
  top: -180px; left: -120px;
}
.glow-b {
  width: 420px; height: 420px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.32), transparent 70%);
  top: 80px; right: -80px;
  animation-delay: -8s;
}
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%      { transform: translate(40px, -30px) scale(1.05); }
  66%      { transform: translate(-30px, 40px) scale(0.95); }
}
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(99,102,241,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,102,241,0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, black, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, black, transparent 80%);
}

.hero-inner {
  max-width: 1100px; margin: 0 auto; text-align: center;
  position: relative;
  animation: heroIn 1s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}
@keyframes heroIn {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

.badge-row { margin-bottom: 24px; }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px;
  border-radius: 100px;
  background: rgba(79, 70, 229, 0.08);
  border: 1px solid rgba(79, 70, 229, 0.18);
  color: var(--primary-deep);
  font-size: 13px; font-weight: 600; letter-spacing: 0.2px;
}
.badge i { font-size: 11px; }

.hero-title {
  margin: 0 0 22px;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1.5px;
}
.title-mono {
  display: block;
  font-size: clamp(42px, 6.6vw, 78px);
  background: linear-gradient(90deg, #1a1d2e 0%, #4f46e5 60%, #f59e0b 110%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  background-size: 200% 100%;
  animation: shine 7s linear infinite;
}
@keyframes shine {
  0%   { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}
.title-sub {
  display: block;
  margin-top: 10px;
  font-size: clamp(18px, 2.2vw, 26px);
  font-weight: 500;
  color: var(--text-soft);
  letter-spacing: -0.3px;
}

.authors {
  max-width: 980px;
  margin: 0 auto 28px;
  text-align: center;
}
.authors-line {
  display: flex; flex-wrap: wrap;
  justify-content: center;
  column-gap: 18px; row-gap: 6px;
  margin-bottom: 14px;
}
.author {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}
.author .aname { letter-spacing: -0.1px; }
.author .aff {
  font-size: 11px;
  color: var(--primary);
  font-weight: 700;
  margin-left: 1px;
  vertical-align: super;
  line-height: 0;
}
.affils {
  display: flex; flex-wrap: wrap;
  justify-content: center;
  column-gap: 18px; row-gap: 4px;
  font-size: 14px;
  color: var(--text-soft);
  margin-bottom: 10px;
}
.affils sup {
  color: var(--primary);
  font-weight: 700;
  margin-right: 2px;
}
.author-notes {
  display: flex; flex-wrap: wrap;
  justify-content: center;
  column-gap: 16px; row-gap: 4px;
  font-size: 13px;
  color: var(--text-mute);
  margin-bottom: 6px;
}
.author-notes sup {
  color: var(--primary);
  font-weight: 700;
  margin-right: 2px;
}
.author-email {
  font-size: 13.5px;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-mute);
}
.author-email a { color: var(--primary); }
.author-email a:hover { color: var(--primary-deep); text-decoration: underline; }

@media (max-width: 720px) {
  .author { font-size: 15px; }
  .affils { font-size: 13px; }
  .author-notes { font-size: 12px; }
  .author-email { font-size: 12.5px; }
}

.hero-tagline {
  max-width: 800px; margin: 0 auto 32px;
  font-size: 18px; color: var(--text-soft);
  line-height: 1.7;
}
.hero-tagline em { color: var(--primary); font-style: normal; font-weight: 600; }
.tag-stat {
  display: inline-block; margin: 10px 6px 0;
  padding: 4px 11px;
  border-radius: 100px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 13px; font-weight: 600;
  font-family: 'JetBrains Mono', monospace;
  box-shadow: var(--shadow-sm);
}

.cta-row {
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: center;
  margin-bottom: 56px;
}
.cta {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 12px 22px;
  border-radius: 100px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  color: var(--text);
  font-weight: 600; font-size: 14.5px;
  transition: all 0.22s ease;
  box-shadow: var(--shadow-sm);
}
.cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
  color: var(--primary);
}
.cta-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-soft));
  color: white !important;
  border-color: transparent;
  box-shadow: 0 8px 22px rgba(79, 70, 229, 0.32);
}
.cta-primary:hover { color: white !important; box-shadow: 0 12px 28px rgba(79, 70, 229, 0.42); }
.cta-ghost { background: transparent; }

.hero-figure {
  margin: 12px auto 0;
  max-width: 1000px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.hero-figure:hover { transform: translateY(-4px); }
.hero-figure img { width: 100%; }

/* ============================================================
   SECTIONS
   ============================================================ */
.section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 88px 28px;
}
.section-tight { padding: 24px 28px 64px; }

.section-head {
  text-align: center;
  margin: 0 auto 56px;
  max-width: 760px;
}
.section-kicker {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 1.5px;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-head h2 {
  margin: 0 0 14px;
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 700;
  letter-spacing: -1px;
  line-height: 1.2;
}
.section-lead {
  margin: 0;
  font-size: 17px;
  color: var(--text-soft);
  line-height: 1.7;
}

.prose { max-width: 760px; margin: 0 auto; font-size: 17px; line-height: 1.75; color: var(--text-soft); }
.prose p { margin: 0 0 18px; }
.prose strong { color: var(--text); font-weight: 600; }

/* ============================================================
   STATS GRID (animated counters)
   ============================================================ */
.stats-grid {
  display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  max-width: 1100px;
  margin: 0 auto;
}
.stat-card {
  text-align: center;
  padding: 28px 18px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s;
}
.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}
.stat-num {
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 800;
  line-height: 1.1;
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: -1px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat-rho { font-size: clamp(26px, 3.0vw, 34px); }
.stat-label {
  margin-top: 6px;
  font-size: 13px;
  color: var(--text-mute);
  font-weight: 500;
  letter-spacing: 0.2px;
}
.rho { font-style: italic; font-family: 'JetBrains Mono', monospace; color: var(--primary); }

/* ============================================================
   FIGURE CARDS
   ============================================================ */
.figure-card {
  margin: 0 auto;
  max-width: 1000px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}
.figure-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.figure-card img { width: 100%; }
.figure-card figcaption {
  padding: 18px 24px 22px;
  font-size: 14.5px;
  color: var(--text-soft);
  border-top: 1px solid var(--border);
  background: var(--surface-2);
  line-height: 1.65;
}

.pipeline-grid {
  display: grid; gap: 22px;
  grid-template-columns: 1fr 1fr;
  max-width: 1100px; margin: 0 auto;
}
@media (max-width: 880px) { .pipeline-grid { grid-template-columns: 1fr; } }
.pipeline-card { position: relative; }
.card-tag {
  position: absolute; top: 16px; left: 16px; z-index: 2;
  padding: 4px 11px;
  border-radius: 100px;
  font-size: 11.5px; font-weight: 700;
  letter-spacing: 0.4px;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  color: var(--primary-deep);
  text-transform: uppercase;
}

.formula-row {
  display: grid; gap: 18px;
  grid-template-columns: 1fr 1fr;
  margin-top: 32px;
}
@media (max-width: 720px) { .formula-row { grid-template-columns: 1fr; } }
.formula-card {
  padding: 24px 26px;
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.06), rgba(99, 102, 241, 0.03));
  border: 1px solid rgba(99, 102, 241, 0.18);
  border-radius: var(--radius);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.formula-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.formula-eq {
  font-family: 'JetBrains Mono', monospace;
  font-size: 18px; font-weight: 600;
  color: var(--primary-deep);
  letter-spacing: -0.3px;
  margin-bottom: 8px;
}
.formula-cap { font-size: 14px; color: var(--text-soft); }

/* ============================================================
   LEADERBOARD
   ============================================================ */
.lb-controls {
  display: flex; flex-wrap: wrap; gap: 14px;
  align-items: center; justify-content: space-between;
  margin-bottom: 18px;
}
.lb-tabs {
  display: inline-flex; padding: 4px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 100px;
}
.lb-tab {
  background: transparent; border: 0; cursor: pointer;
  padding: 8px 18px;
  border-radius: 100px;
  font-family: inherit; font-size: 14px; font-weight: 600;
  color: var(--text-soft);
  transition: all 0.22s ease;
}
.lb-tab.active {
  background: var(--surface);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}
.lb-tab:hover:not(.active) { color: var(--text); }

.lb-filters { display: flex; gap: 8px; flex-wrap: wrap; }
.lb-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 14px;
  border-radius: 100px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  font-family: inherit; font-size: 13px; font-weight: 600;
  color: var(--text-soft);
  cursor: pointer;
  transition: all 0.22s ease;
}
.lb-chip:hover { border-color: var(--primary); color: var(--primary); }
.lb-chip.active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}
.chip-count {
  display: inline-block;
  min-width: 22px; padding: 0 6px;
  background: rgba(255,255,255,0.18);
  border-radius: 100px;
  font-size: 11px;
  text-align: center;
}
.lb-chip:not(.active) .chip-count {
  background: var(--bg-soft);
  color: var(--text-mute);
}

.lb-search {
  position: relative;
  flex-grow: 1; max-width: 280px;
}
.lb-search i {
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  color: var(--text-mute); font-size: 13px;
}
.lb-search input {
  width: 100%;
  padding: 9px 14px 9px 38px;
  border-radius: 100px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  font-family: inherit; font-size: 14px;
  color: var(--text);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.lb-search input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

.lb-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: auto;
  box-shadow: var(--shadow-md);
}
.lb-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  min-width: 880px;
}
.lb-table th, .lb-table td {
  padding: 13px 14px;
  text-align: right;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.lb-table thead th {
  position: sticky; top: 0;
  background: var(--surface-2);
  font-weight: 700;
  font-size: 13px;
  color: var(--text-soft);
  letter-spacing: 0.2px;
  text-transform: none;
  user-select: none;
  cursor: pointer;
  transition: background 0.18s, color 0.18s;
}
.lb-table thead th:hover { background: var(--bg-soft); color: var(--text); }
.lb-table th.is-active { color: var(--primary); }
.lb-table th.is-active::after {
  content: ' \25BC';
  font-size: 9px;
}
.lb-table th.is-active.asc::after { content: ' \25B2'; }
.lb-table .th-rank, .lb-table .th-model, .lb-table .th-family { text-align: left; }
.lb-table tbody td.col-rank, .lb-table tbody td.col-model, .lb-table tbody td.col-family { text-align: left; }

.lb-table tbody tr {
  transition: background 0.16s, transform 0.18s;
}
.lb-table tbody tr:hover { background: var(--surface-2); }
.lb-table tbody tr.lb-row-anim {
  animation: rowFadeIn 0.32s ease both;
}
@keyframes rowFadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.col-rank { font-family: 'JetBrains Mono', monospace; font-weight: 700; color: var(--text-mute); width: 38px; }
.col-model { font-weight: 600; color: var(--text); min-width: 180px; }
.col-family { width: 130px; }
.fam-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 12px; font-weight: 600;
}
.fam-closed { background: rgba(99, 102, 241, 0.10); color: var(--closed); }
.fam-open   { background: rgba(20, 184, 166, 0.12); color: var(--open); }
.fam-dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

.col-num { font-family: 'JetBrains Mono', monospace; font-weight: 500; color: var(--text); }
td.is-best {
  color: var(--accent);
  font-weight: 700;
  position: relative;
}
td.is-best::before {
  content: ''; position: absolute;
  left: 4px; top: 50%; width: 4px; height: 4px;
  transform: translateY(-50%);
  background: var(--accent); border-radius: 50%;
  box-shadow: 0 0 8px var(--accent);
}
td.is-second {
  color: var(--silver);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--silver);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}

.lb-note {
  margin-top: 14px;
  font-size: 13px;
  color: var(--text-mute);
  text-align: center;
}
.dot-best, .dot-second {
  display: inline-block; width: 8px; height: 8px; border-radius: 50%;
  vertical-align: middle; margin: 0 5px 2px 12px;
}
.dot-best { background: var(--accent); box-shadow: 0 0 6px rgba(245,158,11,0.6); }
.dot-second { background: var(--silver); }

/* ============================================================
   VALIDATION TABLE (Table 1 — human Elo vs metrics)
   ============================================================ */
.val-table { min-width: 1020px; }
.val-table tbody td.col-num { text-align: right; }

.delta-pill {
  display: inline-block;
  min-width: 24px;
  padding: 2px 9px;
  border-radius: 100px;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 12px;
  line-height: 1.4;
  letter-spacing: 0.2px;
  border: 1px solid transparent;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.delta-pill.delta-zero {
  color: #11825a;
  background: rgba(20, 184, 134, 0.12);
  border-color: rgba(20, 184, 134, 0.32);
  box-shadow: 0 0 0 0 rgba(20, 184, 134, 0.0);
}
.delta-pill.delta-low {
  color: #b76200;
  background: rgba(245, 158, 11, 0.14);
  border-color: rgba(245, 158, 11, 0.32);
}
.delta-pill.delta-high {
  color: #c0341d;
  background: rgba(220, 38, 38, 0.10);
  border-color: rgba(220, 38, 38, 0.30);
}
.lb-table tbody tr:hover .delta-pill {
  transform: translateY(-1px);
}
.lb-table tbody tr:hover .delta-pill.delta-zero {
  box-shadow: 0 0 12px rgba(20, 184, 134, 0.45);
}
.lb-table tbody tr:hover .delta-pill.delta-low {
  box-shadow: 0 0 12px rgba(245, 158, 11, 0.45);
}
.lb-table tbody tr:hover .delta-pill.delta-high {
  box-shadow: 0 0 12px rgba(220, 38, 38, 0.45);
}

/* dashed divider between closed- and open-source generators */
.rb-divider td {
  padding: 0;
  height: 0;
  border-bottom: 1px dashed var(--border-strong);
  background: transparent;
}
.rb-divider:hover td { background: transparent; }

.val-note .delta-pill { margin: 0 4px 0 8px; }

/* ============================================================
   REWARD-MODELS TABLE (Table 2 — WorldRewardBench alignment)
   ============================================================ */
.rb-table { min-width: 1180px; }
.rb-table thead th {
  text-align: center;
  white-space: nowrap;
}
.rb-table thead th.rb-th-rowsp {
  vertical-align: middle;
  text-align: left;
}
.rb-th-group {
  font-size: 11.5px;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  border-bottom: 2px solid var(--border);
}
.rb-grp-closed { color: var(--closed); }
.rb-grp-open { color: var(--open); }
.rb-grp-closed::after, .rb-grp-open::after {
  content: '';
  display: block;
  height: 2px;
  margin-top: 6px;
  border-radius: 2px;
}
.rb-grp-closed::after { background: linear-gradient(90deg, var(--closed), rgba(99,102,241,0.0)); }
.rb-grp-open::after   { background: linear-gradient(90deg, var(--open), rgba(20,184,166,0.0)); }

.rb-table tbody td {
  text-align: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13.5px;
}
.rb-table tbody td.col-model {
  text-align: left;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}
.rb-table tbody td.rb-proto {
  text-align: left;
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  color: var(--text-soft);
  white-space: nowrap;
}

/* meta row: "Frames used" */
.rb-meta td {
  background: var(--bg-soft);
  font-size: 12px;
  color: var(--text-mute);
}
.rb-meta:hover td { background: var(--bg-soft); }

/* visual separator above each new dimension block */
.rb-dim-head td {
  border-top: 1px solid var(--border);
}

/* Overall row: subtle primary tint */
.rb-overall td {
  background: rgba(79, 70, 229, 0.045);
}
.rb-overall:hover td {
  background: rgba(79, 70, 229, 0.085);
}
.rb-overall td.col-model {
  color: var(--primary-deep);
}

/* inline highlights — used inside cells that contain two numbers */
.hl-best {
  color: var(--accent);
  font-weight: 700;
}
.hl-second {
  color: #6f7286;
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--silver);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}

@media (max-width: 720px) {
  .val-table, .rb-table { font-size: 13px; }
  .delta-pill { font-size: 11px; padding: 1px 7px; }
}

/* ============================================================
   QUALITATIVE / VIDEO GRID
   ============================================================ */
.dim-tabs {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 8px;
  margin-bottom: 28px;
}
.dim-tab {
  padding: 9px 18px;
  border-radius: 100px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  color: var(--text-soft);
  font-family: inherit; font-size: 14px; font-weight: 600;
  cursor: pointer;
  transition: all 0.22s ease;
}
.dim-tab:hover { border-color: var(--primary); color: var(--primary); }
.dim-tab.active {
  background: linear-gradient(135deg, var(--primary), var(--primary-soft));
  border-color: transparent;
  color: white;
  box-shadow: 0 6px 16px rgba(79, 70, 229, 0.32);
}

.video-grid {
  display: grid; gap: 18px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
@media (max-width: 900px) {
  .video-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 620px) {
  .video-grid { grid-template-columns: 1fr; }
}
.video-grid-actions {
  display: flex;
  justify-content: center;
  margin-top: 22px;
}
.video-expand-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--surface);
  color: var(--primary);
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
  font-weight: 700;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.18s, color 0.18s, transform 0.18s, box-shadow 0.18s;
}
.video-expand-btn:hover {
  border-color: var(--primary);
  color: var(--primary-deep);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.video-expand-btn[hidden] {
  display: none;
}
.video-item {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.video-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.video-poster {
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #2a2d3e 0%, #4a4f6e 100%);
  position: relative;
  overflow: hidden;
}
.video-poster.has-video {
  background: #000;
}
.video-poster.has-video::before {
  display: none;
}
.video-poster::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(45deg, rgba(255,255,255,0.04) 25%, transparent 25%, transparent 50%,
                          rgba(255,255,255,0.04) 50%, rgba(255,255,255,0.04) 75%, transparent 75%);
  background-size: 16px 16px;
  animation: stripe 3s linear infinite;
}
@keyframes stripe { from { background-position: 0 0; } to { background-position: 16px 16px; } }
.video-poster img { width: 100%; height: 100%; object-fit: cover; opacity: 0.45; }
.video-poster video {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  background: #000;
}
.video-model-badge {
  position: absolute;
  right: 12px;
  bottom: 12px;
  z-index: 2;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(8px);
  color: #c84f1b;
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.16);
}
.video-poster .play-icon {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 56px; height: 56px;
  border-radius: 50%;
  background: rgba(255,255,255,0.92);
  color: var(--primary-deep);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.3);
  transition: transform 0.25s, background 0.25s;
}
.video-item:hover .play-icon { transform: translate(-50%, -50%) scale(1.08); background: var(--accent-soft); }
.video-poster .placeholder-tag {
  position: absolute; bottom: 10px; right: 12px;
  padding: 3px 9px; border-radius: 100px;
  background: rgba(0,0,0,0.55); backdrop-filter: blur(6px);
  color: white; font-size: 11px; font-weight: 600; letter-spacing: 0.4px;
}
.video-meta { padding: 14px 18px 18px; }
.video-meta .vm-cat {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px; font-weight: 600;
  color: var(--primary); letter-spacing: 0.3px;
  text-transform: uppercase;
  margin-bottom: 4px;
}
.vm-prompt-wrap {
  position: relative;
}
.video-meta .vm-title {
  display: -webkit-box;
  padding-right: 34px;
  max-height: calc(1.45em * 3);
  overflow: hidden;
  color: var(--text);
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.45;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}
.video-meta .vm-title.expanded {
  display: block;
  max-height: none;
  overflow: visible;
  -webkit-line-clamp: unset;
}
.vm-prompt-toggle {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 26px;
  height: 26px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--primary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  box-shadow: 0 4px 12px rgba(16, 24, 40, 0.10);
  transition: border-color 0.18s, color 0.18s, transform 0.18s, box-shadow 0.18s;
}
.vm-prompt-toggle:hover {
  border-color: var(--primary);
  color: var(--primary-deep);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(79, 70, 229, 0.18);
}
.vm-prompt-toggle[hidden] {
  display: none;
}

/* ============================================================
   BIBTEX
   ============================================================ */
.bibtex-card {
  position: relative;
  max-width: 860px; margin: 0 auto;
  background: #0f1118;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.bibtex-card pre {
  margin: 0; padding: 24px 28px;
  overflow-x: auto;
  color: #d4d8e6;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13.5px;
  line-height: 1.75;
}
.copy-btn {
  position: absolute; top: 14px; right: 14px;
  width: 36px; height: 36px;
  border-radius: 8px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.10);
  color: #c0c5d6;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
  display: flex; align-items: center; justify-content: center;
}
.copy-btn:hover { background: rgba(255,255,255,0.12); color: white; }
.copy-btn.copied { background: rgba(34, 197, 94, 0.2); color: #4ade80; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  margin-top: 48px;
  padding: 36px 28px;
  border-top: 1px solid var(--border);
  background: var(--surface-2);
}
.footer-inner {
  max-width: 1100px; margin: 0 auto; text-align: center;
  font-size: 13.5px; color: var(--text-mute);
}
.footer-links { margin-top: 6px; }
.footer-links a { color: var(--text-soft); margin: 0 4px; }

/* ============================================================
   REVEAL (scroll fade-in)
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   SELECTION
   ============================================================ */
::selection { background: rgba(79, 70, 229, 0.18); color: var(--primary-deep); }