@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Geist:wght@300;400;500;600;700&display=swap');

:root {
  --bg:            #0d1117;
  --bg-grad:       radial-gradient(ellipse at 50% -10%, rgba(255,255,255,0.055) 0%, transparent 50%), radial-gradient(ellipse at 50% 0%, #16213a 0%, #0d1117 60%);
  --sticky-bg:     rgba(13, 17, 23, 0.95);
  --surface:       rgba(255, 255, 255, 0.055);
  --surface-raised: rgba(255, 255, 255, 0.09);
  --glass-bg:      rgba(255, 255, 255, 0.07);
  --glass-border:  rgba(255, 255, 255, 0.13);
  --border:        rgba(255, 255, 255, 0.12);
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-strong: rgba(255, 255, 255, 0.22);
  --text-primary:   #f4f7ff;
  --text-secondary: #b0bccf;
  --text-tertiary:  #6b7a95;
  --accent:         #6366f1;
  --accent-dim:     rgba(99, 102, 241, 0.12);
  --accent-hover:   rgba(255, 255, 255, 0.04);
  --glow-primary:   rgba(99, 102, 241, 0.35);
  --dot-online:   #34d399;
  --dot-offline:  #f87171;
  --bar-empty:    rgba(255, 255, 255, 0.06);
  --grad-code:    linear-gradient(90deg, #6366f1, #8b5cf6);
  --grad-reason:  linear-gradient(90deg, #3b82f6, #6366f1);
  --grad-mmlu:    linear-gradient(90deg, #06b6d4, #3b82f6);
  --grad-trans:   linear-gradient(90deg, #10b981, #06b6d4);
  --grad-speed:   linear-gradient(90deg, #f59e0b, #10b981);
  --bar-code:     rgba(255,255,255,1.0);
  --bar-reason:   rgba(255,255,255,0.80);
  --bar-instr:    rgba(255,255,255,0.65);
  --bar-trans:    rgba(255,255,255,0.50);
  --bar-speed:    rgba(255,255,255,0.40);
  --badge-small-bg:   rgba(255,255,255,0.07);
  --badge-small-txt:  #b0bccf;
  --badge-medium-bg:  rgba(255,255,255,0.07);
  --badge-medium-txt: #b0bccf;
  --badge-large-bg:   rgba(99,102,241,0.15);
  --badge-large-txt:  #a5b4fc;
  --radius:     16px;
  --radius-sm:  10px;
  --radius-md:  16px;
  --radius-pill: 999px;
  --sp-xs:4px;--sp-sm:8px;--sp-md:16px;--sp-lg:24px;--sp-xl:32px;--sp-2xl:48px;
  --font-sans: 'Geist', 'Inter', system-ui, sans-serif;
  --font-mono: 'DM Mono', 'Roboto Mono', monospace;
  --shadow-card: 0 4px 24px rgba(0,0,0,0.35), 0 1px 4px rgba(0,0,0,0.2);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
  overflow-x: hidden;
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--bg);
  background-image: var(--bg-grad);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}
h1,h2,h3 { font-family: var(--font-sans); font-weight: 600; line-height: 1.2; color: var(--text-primary); margin: 0; }

/* header */
.header {
  background: rgba(13, 17, 23, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  height: 60px;
  max-height: 60px;
  overflow: visible;
  position: sticky;
  top: 0;
  z-index: 50;
  transition: box-shadow 0.3s;
}
.header.scrolled { box-shadow: 0 4px 32px rgba(0,0,0,0.4); }

/* beta ribbon — diagonal white stripe top-right corner */
.beta-ribbon-wrapper {
  display: none; /* removed */
}
.beta-ribbon {
  position: absolute;
  top: 20px;
  right: -22px;
  width: 100px;
  text-align: center;
  background: rgba(255, 255, 255, 0.92);
  color: #0d1117;
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 4px 0;
  transform: rotate(45deg);
  box-shadow: 0 2px 8px rgba(0,0,0,0.4);
  line-height: 1;
}
.header-content {
  max-width: 100%;
  margin: 0;
  padding: 0 12px 0 0;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 4px;
  overflow: visible;
}
.logo {
  display: flex;
  align-items: center;
  gap: 4px;
  text-decoration: none;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-right: 4px;
  flex-shrink: 0;
}
.logo-icon { height: 108px !important; width: 108px !important; max-height: 108px !important; max-width: 108px !important; object-fit: contain; display: inline-block; flex-shrink: 0; vertical-align: middle; position: relative; z-index: 1; }
.nav { display: flex; align-items: center; flex: 1; position: relative; }
.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  height: 60px;
  padding: 0 14px;
  color: #a8bdcf;
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 400;
  transition: color 0.2s;
  white-space: nowrap;
}
.nav-link:hover { color: var(--text-primary); }
.nav-link.active { color: var(--text-primary); font-weight: 500; }

/* Sliding underline indicator */
.nav-indicator {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, #6366f1, #3b82f6);
  border-radius: 2px 2px 0 0;
  transition: left 0.3s cubic-bezier(0.4,0,0.2,1), width 0.3s cubic-bezier(0.4,0,0.2,1), opacity 0.2s;
  pointer-events: none;
  opacity: 0;
}
.nav-indicator.visible { opacity: 1; }

/* theme switch */
.theme-switch-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  flex-shrink: 0;
}
.theme-switch-label { font-size: 11px; color: var(--text-secondary); user-select: none; }
.theme-switch {
  position: relative;
  width: 44px;
  height: 24px;
  cursor: pointer;
  display: inline-block;
  flex-shrink: 0;
}
.theme-switch input { opacity: 0; width: 0; height: 0; position: absolute; }
.theme-switch-track {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border-strong);
  transition: background 0.25s, border-color 0.25s, box-shadow 0.25s;
}
.theme-switch input:checked ~ .theme-switch-track {
  background: linear-gradient(135deg, #6366f1, #3b82f6);
  border-color: transparent;
  box-shadow: 0 0 12px rgba(99,102,241,0.4);
}
.theme-switch-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--text-secondary);
  transition: transform 0.25s cubic-bezier(0.4,0,0.2,1), background 0.25s;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  line-height: 1;
}
.theme-switch input:checked ~ .theme-switch-thumb {
  transform: translateX(20px);
  background: #fff;
}

/* hero */
.hero {
  background: transparent;
  border-bottom: 1px solid var(--border);
  padding: 32px 0 24px;
  position: relative;
}
.hero::before {
  content: '';
  position: absolute;
  top: -60px;
  left: 0;
  width: 500px;
  height: 200px;
  background: radial-gradient(ellipse at left center, rgba(255,255,255,0.03) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner {
  max-width: 100%;
  margin: 0;
  padding: 0 24px;
  position: relative;
}
.hero-headline {
  font-family: var(--font-sans);
  font-size: 34px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.04em;
  margin-bottom: 10px;
  line-height: 1.15;
  text-shadow: 0 0 40px rgba(163,163,247,0.15);
}
.hero-headline em { font-style: normal; color: var(--text-secondary); }
.hero-sub { font-size: 14px; color: var(--text-primary); opacity: 0.85; margin-bottom: 20px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.hero-updated { display: inline-flex; align-items: center; gap: 6px; font-size: 11px; color: var(--text-secondary); font-family: var(--font-mono); }
.live-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--dot-online);
  display: inline-block;
  box-shadow: 0 0 6px var(--dot-online);
  animation: blink 3s ease-in-out infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.3} }

/* size filter row */
.size-filter-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  position: sticky;
  top: 60px;
  z-index: 40;
  background: var(--bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 10px 0;
}
/* inner wrapper for filter row content */
.size-filter-inner {
  max-width: 100%;
  margin: 0;
  padding: 0 24px;
  width: 100%;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.size-filter-label { font-size: 11px; color: var(--text-secondary); letter-spacing: 0.08em; text-transform: uppercase; margin-right: 4px; font-family: var(--font-mono); }
.size-chip {
  height: 30px;
  padding: 0 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 400;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s, box-shadow 0.2s, transform 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.size-chip:hover { border-color: var(--border-strong); color: var(--text-primary); transform: translateY(-1px); }
.size-chip.active {
  background: linear-gradient(135deg, #6366f1, #3b82f6);
  border-color: transparent;
  color: #fff;
  font-weight: 600;
  box-shadow: 0 2px 12px rgba(99,102,241,0.35);
}

/* container */
.container { max-width: 100%; margin: 0; padding: 32px 24px 64px; }

/* stats grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 48px;
}
.stat-card {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-top: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius);
  padding: 22px 20px;
  box-shadow: var(--shadow-card), 0 0 0 0.5px rgba(255,255,255,0.06) inset;
  transition: transform 0.25s cubic-bezier(0.4,0,0.2,1), box-shadow 0.25s, background 0.2s;
}
.stat-card:hover {
  transform: translateY(-3px) scale(1.01);
  background: rgba(255,255,255,0.10);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4), 0 1px 0 rgba(255,255,255,0.18) inset;
}
.stat-card-icon {
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px;
  margin-bottom: 16px;
  color: #a5b4fc;
  border: 1px solid rgba(99,102,241,0.2);
  border-radius: var(--radius-sm);
  background: rgba(99,102,241,0.08);
}
.stat-card-icon.primary-cont,
.stat-card-icon.tertiary-cont,
.stat-card-icon.secondary-cont,
.stat-card-icon.error-cont { background: rgba(99,102,241,0.08); border-color: rgba(99,102,241,0.2); }
.stat-value {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 4px;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}
.stat-label { font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-secondary); font-family: var(--font-mono); }

/* section titles */
.section-title { font-family: var(--font-sans); font-size: 18px; font-weight: 600; color: var(--text-primary); letter-spacing: -0.02em; margin-bottom: 3px; }
.section-sub { font-size: 13px; color: var(--text-secondary); margin-bottom: 20px; }

/* segmented buttons */
.seg-btn-group {
  display: inline-flex;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 3px;
  gap: 2px;
}
.seg-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 18px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 400;
  cursor: pointer;
  border-radius: var(--radius-pill);
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}
.seg-btn:hover { color: var(--text-primary); background: rgba(255,255,255,0.06); }
.seg-btn.active {
  background: linear-gradient(135deg, #6366f1, #3b82f6);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 2px 10px rgba(99,102,241,0.4);
}

/* panels with crossfade */
.leaderboard-panel { display: none; }
.leaderboard-panel.active {
  display: block;
  animation: panel-in 0.3s cubic-bezier(0.4,0,0.2,1) both;
}
@keyframes panel-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.category-section { margin-bottom: 48px; }
.category-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  gap: 12px;
  flex-wrap: wrap;
}
.category-header-left { display: flex; align-items: center; gap: 10px; }
.category-name { font-family: var(--font-mono); font-size: 11px; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.1em; }

/* size badges */
.size-badge {
  display: inline-flex;
  align-items: center;
  height: 22px;
  padding: 0 10px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.04em;
  border: 1px solid var(--border);
}
.size-badge.small   { color: var(--badge-small-txt);  background: var(--badge-small-bg); }
.size-badge.medium  { color: var(--badge-medium-txt); background: var(--badge-medium-bg); }
.size-badge.large   { color: var(--badge-large-txt);  background: var(--badge-large-bg); border-color: rgba(99,102,241,0.25); }
.size-badge.unknown { color: var(--text-secondary); background: transparent; }

/* sort chips */
.sort-row { display: flex; gap: 6px; flex-wrap: wrap; }
.sort-chip {
  height: 28px;
  padding: 0 12px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 400;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s, transform 0.15s;
}
.sort-chip:hover { border-color: var(--border-strong); color: var(--text-primary); transform: translateY(-1px); }
.sort-chip.active {
  background: linear-gradient(135deg, #6366f1, #3b82f6);
  border-color: transparent;
  color: #fff;
  font-weight: 600;
}

/* model cards grid */
.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
}
.model-card {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-top: 1px solid rgba(255,255,255,0.18);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow-card), 0 1px 0 rgba(255,255,255,0.07) inset;
  transition: transform 0.25s cubic-bezier(0.4,0,0.2,1), box-shadow 0.25s, background 0.2s, border-color 0.2s;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}
.model-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(255,255,255,0.04) 0%, rgba(99,102,241,0.06) 50%, transparent 100%);
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}
.model-card:hover {
  transform: translateY(-4px) scale(1.015);
  background: rgba(255,255,255,0.10);
  border-color: rgba(99,102,241,0.3);
  box-shadow: 0 12px 40px rgba(0,0,0,0.4), 0 0 0 1px rgba(99,102,241,0.15), 0 1px 0 rgba(255,255,255,0.2) inset;
}
.model-card:hover::before { opacity: 1; }
.card-breakdown-link::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
}
.model-card .cmp-chip,
.model-card button {
  position: relative;
  z-index: 2;
}
.model-card.rank-1 {
  border-color: rgba(99,102,241,0.45);
  border-top-color: rgba(165,180,252,0.5);
  box-shadow: var(--shadow-card), 0 0 24px rgba(99,102,241,0.15), 0 1px 0 rgba(255,255,255,0.12) inset;
}
.model-card.rank-2 { border-color: rgba(59,130,246,0.3); }

.card-header { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 18px; gap: 10px; }
.card-title-wrap { flex: 1; min-width: 0; }
.card-model-name { font-family: var(--font-sans); font-size: 15px; font-weight: 600; color: var(--text-primary); margin-bottom: 2px; line-height: 1.3; letter-spacing: -0.01em; }
.card-model-meta { font-size: 11px; color: var(--text-secondary); font-family: var(--font-mono); }
.card-right { display: flex; flex-direction: column; align-items: flex-end; gap: 6px; flex-shrink: 0; }
.rank-num { font-family: var(--font-mono); font-size: 13px; font-weight: 400; line-height: 1; font-variant-numeric: tabular-nums; color: var(--text-secondary); }
.rank-num.gold   { color: #a5b4fc; font-weight: 700; }
.rank-num.silver { color: #93c5fd; }
.rank-num.bronze { color: #6ee7b7; }
.rank-num.other  { color: var(--text-secondary); }

/* compare chip */
.cmp-chip {
  height: 26px;
  padding: 0 12px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 11px;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s, box-shadow 0.2s;
  display: flex; align-items: center; gap: 3px;
}
.cmp-chip:hover { border-color: rgba(99,102,241,0.5); color: #a5b4fc; }
.cmp-chip.selected {
  background: linear-gradient(135deg, #6366f1, #3b82f6);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 2px 10px rgba(99,102,241,0.35);
}

/* score bars */
.score-block { display: flex; flex-direction: column; gap: 8px; margin-bottom: 16px; }
.score-row { display: flex; align-items: center; gap: 10px; position: relative; transition: opacity 0.2s; }
.score-block:hover .score-row { opacity: 0.4; }
.score-block:hover .score-row:hover { opacity: 1; }
.score-label { width: 68px; font-size: 10px; font-weight: 500; letter-spacing: 0.06em; color: var(--text-secondary); text-transform: uppercase; flex-shrink: 0; font-family: var(--font-mono); }
.score-bar-wrap { flex: 1; min-width: 0; height: 4px; background: var(--bar-empty); position: relative; overflow: visible; border-radius: 4px; }
.score-bar-fill {
  display: block;
  height: 100%;
  border-radius: 4px;
  width: 0;
  transition: width 1.2s cubic-bezier(0.4,0,0.2,1);
  min-width: 0;
}
.fill-code   { background: var(--grad-code); box-shadow: 0 0 8px rgba(99,102,241,0.35); }
.fill-reason { background: var(--grad-reason); box-shadow: 0 0 8px rgba(59,130,246,0.3); }
.fill-mmlu   { background: var(--grad-mmlu); box-shadow: 0 0 8px rgba(6,182,212,0.25); }
.fill-trans  { background: var(--grad-trans); box-shadow: 0 0 8px rgba(16,185,129,0.25); }
.fill-speed  { background: var(--grad-speed); box-shadow: 0 0 8px rgba(245,158,11,0.25); }
.score-val { width: 26px; text-align: right; font-family: var(--font-mono); font-size: 11px; color: var(--text-secondary); flex-shrink: 0; }

/* tooltip */
.score-tooltip {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(10,14,24,0.96);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-size: 11px;
  font-family: var(--font-mono);
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 30;
  backdrop-filter: blur(8px);
}
.score-row:hover .score-tooltip { opacity: 1; }

/* card footer */
.card-score-footer { border-top: 1px solid var(--border-subtle); padding-top: 14px; display: flex; justify-content: space-between; align-items: center; }
.score-footer-label { font-size: 10px; font-weight: 500; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-secondary); font-family: var(--font-mono); }
.score-footer-val { font-family: var(--font-mono); font-size: 24px; font-weight: 500; color: var(--text-primary); font-variant-numeric: tabular-nums; letter-spacing: -0.02em; }
.score-footer-val span { font-size: 12px; font-weight: 400; color: var(--text-secondary); }

/* compare bar */
.compare-bar {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: rgba(10,14,24,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-pill);
  padding: 10px 14px 10px 18px;
  display: none; align-items: center; gap: 12px;
  z-index: 200; white-space: nowrap;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}
.compare-bar.visible { display: flex; }
.compare-bar-label { font-family: var(--font-sans); font-size: 13px; color: var(--text-secondary); }

/* buttons */
.btn-filled {
  height: 38px; padding: 0 22px;
  border-radius: var(--radius-pill); border: none;
  background: linear-gradient(135deg, #6366f1, #3b82f6);
  color: #fff;
  font-family: var(--font-sans); font-size: 13px; font-weight: 600;
  cursor: pointer; display: inline-flex; align-items: center;
  transition: opacity 0.2s, transform 0.15s, box-shadow 0.2s;
}
.btn-filled:hover { opacity: 0.9; transform: translateY(-1px); box-shadow: 0 4px 16px rgba(99,102,241,0.4); }
.btn-tonal {
  height: 38px; padding: 0 22px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  color: var(--text-primary);
  font-family: var(--font-sans); font-size: 13px;
  cursor: pointer; display: inline-flex; align-items: center;
  transition: border-color 0.2s, background 0.2s, transform 0.15s;
}
.btn-tonal:hover { border-color: var(--border-strong); background: rgba(255,255,255,0.08); transform: translateY(-1px); }
.btn, .btn-primary {
  display: inline-flex; align-items: center; gap: 6px;
  height: 38px; padding: 0 22px;
  border-radius: var(--radius-pill);
  font-family: var(--font-sans); font-size: 13px; font-weight: 600;
  cursor: pointer; border: none; text-decoration: none;
  background: linear-gradient(135deg, #6366f1, #3b82f6);
  color: #fff;
  transition: opacity 0.2s, transform 0.15s, box-shadow 0.2s;
}
.btn:hover, .btn-primary:hover { opacity: 0.9; transform: translateY(-1px); box-shadow: 0 4px 16px rgba(99,102,241,0.4); }
.btn-outlined { background: transparent; color: var(--text-primary); border: 1px solid var(--border); }
.btn-outlined:hover { border-color: rgba(99,102,241,0.5); background: var(--accent-dim); box-shadow: none; transform: none; }

/* dialog */
.dialog-scrim { position: fixed; inset: 0; background: rgba(0,0,0,0.7); backdrop-filter: blur(4px); z-index: 300; display: none; align-items: center; justify-content: center; padding: 24px; }
.dialog-scrim.open { display: flex; }
.dialog {
  background: rgba(13,17,30,0.96);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0; max-width: 960px; width: 100%; max-height: 90vh;
  overflow: hidden; display: flex; flex-direction: column;
  box-shadow: 0 24px 64px rgba(0,0,0,0.6);
}
.dialog-header { padding: 22px 24px 18px; border-bottom: 1px solid var(--border); display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.dialog-title { font-family: var(--font-sans); font-size: 18px; font-weight: 600; color: var(--text-primary); letter-spacing: -0.02em; }
.dialog-close {
  width: 34px; height: 34px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: transparent; color: var(--text-secondary); font-size: 16px;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
  flex-shrink: 0;
}
.dialog-close:hover { border-color: var(--border-strong); color: var(--text-primary); background: rgba(255,255,255,0.06); }
.dialog-body { overflow-y: auto; padding: 20px 24px 24px; }
.radar-grid { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; margin-bottom: 24px; }
.radar-card {
  flex: 1; min-width: 200px; max-width: 280px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 16px; text-align: center;
}
.radar-card-name { font-family: var(--font-sans); font-size: 13px; font-weight: 600; color: var(--text-primary); margin-bottom: 2px; }
.radar-card-meta { font-size: 11px; color: var(--text-secondary); margin-bottom: 12px; font-family: var(--font-mono); }
.cmp-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.cmp-table th { text-align: left; padding: 8px 12px; border-bottom: 1px solid var(--border); font-family: var(--font-mono); font-size: 10px; color: var(--text-secondary); letter-spacing: 0.06em; text-transform: uppercase; font-weight: 500; }
.cmp-table td { padding: 8px 12px; border-bottom: 1px solid var(--border-subtle); color: var(--text-secondary); font-family: var(--font-mono); font-size: 12px; }
.cmp-table tr:last-child td { border-bottom: none; }
.cmp-table .row-label { font-size: 11px; color: var(--text-secondary); }
.cmp-table .best { color: #a5b4fc; font-weight: 600; }

/* legend */
.legend { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 16px; font-size: 11px; color: var(--text-secondary); font-family: var(--font-mono); }
.legend-item { display: flex; align-items: center; gap: 6px; }
.legend-dot { width: 12px; height: 4px; border-radius: 4px; flex-shrink: 0; }

/* news */
.news-item { border-bottom: 1px solid var(--border-subtle); padding: 20px 0; }
.news-item:last-child { border-bottom: none; }
.news-date { font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-secondary); margin-bottom: 5px; font-family: var(--font-mono); font-weight: 500; }
.news-title { font-family: var(--font-sans); font-size: 15px; font-weight: 600; color: var(--text-primary); margin-bottom: 6px; line-height: 1.4; letter-spacing: -0.01em; }
.news-title a { color: inherit; text-decoration: none; }
.news-title a:hover { color: #a5b4fc; }
.news-summary { font-size: 13px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 5px; }
.news-source { font-size: 11px; color: var(--text-secondary); font-family: var(--font-mono); }

/* feature cards */
.feature-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
.feature-card {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 22px;
  cursor: pointer;
  box-shadow: var(--shadow-card);
  transition: transform 0.25s cubic-bezier(0.4,0,0.2,1), box-shadow 0.25s, background 0.2s, border-color 0.2s;
}
.feature-card:hover { transform: translateY(-3px) scale(1.01); background: rgba(255,255,255,0.07); border-color: rgba(99,102,241,0.25); box-shadow: 0 8px 28px rgba(0,0,0,0.4); }
.feature-icon { width: 34px; height: 34px; display: flex; align-items: center; justify-content: center; font-size: 15px; margin-bottom: 14px; color: #a5b4fc; border: 1px solid rgba(99,102,241,0.2); border-radius: var(--radius-sm); background: rgba(99,102,241,0.08); }
.feature-name { font-family: var(--font-sans); font-size: 14px; font-weight: 600; color: var(--text-primary); margin-bottom: 2px; letter-spacing: -0.01em; }
.feature-metric { font-size: 10px; font-weight: 500; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 8px; color: var(--text-secondary); font-family: var(--font-mono); }
.feature-desc { font-size: 12px; color: var(--text-secondary); line-height: 1.6; }
.feature-card::after { content: 'view →'; display: block; margin-top: 10px; font-size: 11px; font-family: var(--font-mono); color: #a5b4fc; opacity: 0; transition: opacity 0.2s; }
.feature-card:hover::after { opacity: 1; }

/* footer */
.footer { border-top: 1px solid var(--border); padding: 28px 24px; max-width: 100%; margin: 0; text-align: left; }
.footer-links { display: flex; justify-content: flex-start; gap: 28px; margin-bottom: 10px; flex-wrap: wrap; }
.footer-link { font-family: var(--font-sans); font-size: 13px; color: var(--text-secondary); text-decoration: none; transition: color 0.2s; }
.footer-link:hover { color: #a5b4fc; }
.footer-copy { font-size: 11px; color: var(--text-secondary); font-family: var(--font-mono); }

/* generic utilities */
.card, .card-outlined, .card-elevated { background: var(--glass-bg); backdrop-filter: blur(10px); border: 1px solid var(--glass-border); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow-card); }
.card-title { font-family: var(--font-sans); font-size: 15px; font-weight: 600; letter-spacing: -0.01em; }
.card-subtitle { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }
.section-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.search-container { margin-bottom: 24px; }
.search-box { position: relative; margin-bottom: 12px; }
.search-input {
  width: 100%; height: 46px; padding: 0 18px 0 46px;
  border: 1px solid var(--border); border-radius: var(--radius-pill);
  background: var(--glass-bg); backdrop-filter: blur(10px);
  color: var(--text-primary); font-family: var(--font-sans); font-size: 14px;
  outline: none; transition: border-color 0.2s, box-shadow 0.2s;
}
.search-input::placeholder { color: var(--text-secondary); }
.search-input:focus { border-color: rgba(99,102,241,0.5); box-shadow: 0 0 0 3px rgba(99,102,241,0.12); }
.search-icon { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); color: var(--text-secondary); font-size: 16px; }
.filters { display: flex; gap: 6px; flex-wrap: wrap; }
.filter-btn {
  height: 30px; padding: 0 14px; border: 1px solid var(--border);
  border-radius: var(--radius-pill); background: transparent;
  color: var(--text-secondary); font-family: var(--font-sans); font-size: 12px;
  cursor: pointer; transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.filter-btn:hover { border-color: var(--border-strong); color: var(--text-primary); }
.filter-btn.active { background: linear-gradient(135deg, #6366f1, #3b82f6); border-color: transparent; color: #fff; font-weight: 600; }
.divider { height: 1px; background: var(--border-subtle); margin: 14px 0; }
.progress-bar { height: 4px; background: var(--bar-empty); border-radius: 4px; overflow: hidden; margin: 6px 0; }
.progress-fill { height: 100%; background: linear-gradient(90deg, #6366f1, #3b82f6); border-radius: 4px; transition: width 1.2s cubic-bezier(0.4,0,0.2,1); }
.rank-badge { font-family: var(--font-mono); font-size: 18px; font-weight: 500; color: var(--text-secondary); line-height: 1; }
.rank-1 { color: #a5b4fc; } .rank-2 { color: #93c5fd; } .rank-3 { color: #6ee7b7; }
.chip { display: inline-flex; align-items: center; height: 24px; padding: 0 10px; border-radius: var(--radius-pill); font-family: var(--font-sans); font-size: 11px; border: 1px solid var(--border); color: var(--text-secondary); }
.chip-green-bg, .chip-yellow-bg, .chip-red-bg, .chip-gray-bg { background: transparent; color: var(--text-secondary); border-color: var(--border); }
@keyframes shimmer { 0%,100%{opacity:0.3} 50%{opacity:0.6} }
.skeleton { background: rgba(255,255,255,0.04); border-radius: var(--radius-sm); animation: shimmer 1.6s ease-in-out infinite; }

/* light theme */
[data-theme="light"] {
  --bg:            #f5f7fc;
  --bg-grad:       radial-gradient(ellipse at 50% 0%, #e8ecf8 0%, #f5f7fc 65%);
  --sticky-bg:     rgba(245, 247, 252, 0.92);
  --surface:       rgba(255,255,255,0.85);
  --surface-raised: rgba(255,255,255,0.95);
  --glass-bg:      rgba(255,255,255,0.75);
  --glass-border:  rgba(0,0,0,0.08);
  --border:        rgba(0,0,0,0.1);
  --border-subtle: rgba(0,0,0,0.05);
  --border-strong: rgba(0,0,0,0.2);
  --text-primary:  #0f1117;
  --text-secondary:#4a5568;
  --text-tertiary: #6b7280;
  --accent:        #4f46e5;
  --accent-dim:    rgba(79,70,229,0.1);
  --accent-hover:  rgba(79,70,229,0.06);
  --glow-primary:  rgba(79,70,229,0.2);
  --dot-online:    #059669;
  --dot-offline:   #dc2626;
  --bar-empty:     rgba(0,0,0,0.08);
  --bar-code:      rgba(79,70,229,1.0);
  --bar-reason:    rgba(59,130,246,0.9);
  --bar-instr:     rgba(6,182,212,0.85);
  --bar-trans:     rgba(16,185,129,0.8);
  --bar-speed:     rgba(245,158,11,0.8);
  --badge-small-bg:  rgba(0,0,0,0.05);
  --badge-small-txt: #4a5568;
  --badge-medium-bg: rgba(0,0,0,0.05);
  --badge-medium-txt:#4a5568;
  --badge-large-bg:  rgba(79,70,229,0.1);
  --badge-large-txt: #4f46e5;
  --shadow-card: 0 2px 16px rgba(0,0,0,0.08), 0 1px 3px rgba(0,0,0,0.05);
  --color-primary:  #6366f1;
  --color-tertiary: #10b981;
}

[data-theme="light"] .header {
  background: rgba(245, 247, 252, 0.92);
}

[data-theme="light"] .nav-link {
  color: #4a5568;
}

[data-theme="light"] .nav-link.active,
[data-theme="light"] .nav-link:hover {
  color: #0f1117;
}

[data-theme="light"] .theme-switch-label {
  color: #4a5568;
}



[data-theme="light"] .size-chip {
  border-color: rgba(0,0,0,0.18);
  color: #2d3748;
  background: rgba(255,255,255,0.7);
}
[data-theme="light"] .size-chip:hover {
  border-color: rgba(0,0,0,0.35);
  color: #1a202c;
  background: rgba(255,255,255,0.9);
}
[data-theme="light"] .size-chip.active {
  background: linear-gradient(135deg, #4f46e5, #2563eb);
  border-color: transparent;
  color: #fff;
  font-weight: 600;
  box-shadow: 0 2px 12px rgba(79,70,229,0.4);
}
[data-theme="light"] .size-filter-label {
  color: #4a5568;
}
[data-theme="light"] .nav-link {
  color: #374151;
}
[data-theme="light"] .nav-link.active,
[data-theme="light"] .nav-link:hover {
  color: #111827;
}

/* aliases for legacy references in html */
:root {
  --metric-code:    #8b5cf6;
  --metric-reason:  #3b82f6;
  --metric-mmlu:    #06b6d4;
  --metric-trans:   #10b981;
  --color-primary:  #a5b4fc;
  --color-tertiary: #6ee7b7;
  --color-outline-var: var(--border-subtle);
  --color-on-surface: var(--text-primary);
  --color-on-surface-var: var(--text-secondary);
  --color-surf-cont-low: var(--glass-bg);
}

/* responsive */
/* Hamburger button */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
  background: none;
  border: none;
  cursor: pointer;
  margin-left: auto;
  flex-shrink: 0;
  border-radius: 8px;
  transition: background 0.15s;
}
.nav-hamburger:hover { background: var(--surface); }
.nav-hamburger span {
  display: block;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: transform 0.25s cubic-bezier(0.4,0,0.2,1), opacity 0.2s, background 0.2s;
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav drawer */
.nav-drawer {
  display: none;
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  background: var(--sticky-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 49;
  flex-direction: column;
  padding: 8px 0 12px;
  transform: translateY(-8px);
  opacity: 0;
  transition: transform 0.25s cubic-bezier(0.4,0,0.2,1), opacity 0.2s;
}
.nav-drawer.open {
  transform: translateY(0);
  opacity: 1;
}
.nav-drawer .nav-link {
  height: 44px;
  padding: 0 20px;
  font-size: 14px;
  width: 100%;
  box-sizing: border-box;
}
.nav-drawer .nav-link.active {
  background: var(--surface);
}

@media (max-width: 960px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav { display: none; }
  .nav-hamburger { display: none; }
  .nav-drawer { display: none !important; }
  .theme-switch-wrap { margin-left: 8px; }
  .theme-switch-label { display: none; }
  .provider-grid { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .hero-headline { font-size: 22px; }
  .hero { padding: 16px 0 14px; }
  .hero-inner { padding: 0 16px; }
  .hero-sub { font-size: 12px; margin-bottom: 12px; }
  .header-content { padding: 0 8px 0 0; }
  .header { height: 52px; }
  .nav-drawer { top: 52px; }
  .size-filter-row { top: 52px; padding: 8px 0; }
  .size-filter-inner { padding: 0 16px; gap: 6px; }
  .container { padding: 16px 16px 48px; }
  .page-hero { padding: 16px 0 14px; }
  .page-hero-inner { padding: 0 16px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .stat-card { padding: 12px; }
  .stat-value { font-size: 20px; }
  .stat-label { font-size: 10px; }
  .grid-cards { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .model-card { padding: 10px; }
  .card-model-name { font-size: 11px; }
  .card-model-meta { font-size: 9px; }
  .score-label { width: 48px; font-size: 8px; }
  .score-val { font-size: 9px; }
  .score-block { gap: 6px; }
  .cmp-chip { font-size: 10px; padding: 0 8px; }
  .size-chip { height: 28px; padding: 0 10px; font-size: 11px; }
  .size-filter-label { display: none; }
  .seg-btn-group { width: 100%; }
  .seg-btn { flex: 1; justify-content: center; font-size: 12px; }
  .category-header { flex-direction: column; align-items: flex-start; gap: 8px; }
  .sort-chip { font-size: 10px; height: 26px; padding: 0 10px; }
  .section-title { font-size: 15px; }
  .section-sub { font-size: 11px; }
  .footer { padding: 16px 14px; }
  .footer-links { gap: 12px; flex-wrap: wrap; }
  .compare-bar { padding: 8px 12px; gap: 8px; font-size: 12px; }
  .rank-num { font-size: 11px; padding: 2px 8px; }
  .legend { gap: 8px; flex-wrap: wrap; }
  .legend-item { font-size: 10px; }
  .hero-score-chip { padding: 4px 10px; font-size: 11px; }
  .chip-val { font-size: 15px !important; }
  .model-hero-name { font-size: 20px; }
  .detail-container { padding: 20px 14px 40px; }
  .speed-grid { grid-template-columns: 1fr 1fr; }
  .summary-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ─── Unified page hero (used by news, search, and other inner pages) ────── */
.page-hero {
  background: transparent;
  border-bottom: 1px solid var(--border);
  padding: 28px 0 20px;
}
.page-hero-inner {
  max-width: 100%;
  margin: 0;
  padding: 0 24px;
}
.page-hero-title {
  font-family: var(--font-sans);
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  margin: 0 0 6px 0;
}
.page-hero-sub {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 560px;
}

/* ─── Page jump fix: ensure consistent min-height so sticky bars don't shift layout ─ */
main { min-height: calc(100vh - 60px); }

/* Search page grid */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); }

/* Provider page */
.provider-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 20px; }
.provider-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px 24px;
  transition: box-shadow 0.2s, transform 0.15s;
}
.provider-card:hover { box-shadow: 0 4px 24px rgba(0,0,0,0.18); transform: translateY(-2px); }
.provider-name { font-size: 20px; font-weight: 700; color: var(--text-primary); margin-bottom: 4px; }
.provider-stat { font-size: 13px; color: var(--text-secondary); margin-bottom: 16px; }
.provider-bar-wrap { height: 8px; background: var(--bar-empty); border-radius: 4px; overflow: hidden; margin-bottom: 16px; }
.provider-bar-fill { height: 100%; border-radius: 4px; background: linear-gradient(90deg, #6366f1, #3b82f6); transition: width 0.6s cubic-bezier(.4,0,.2,1); }
.provider-model-list { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }
.prov-model-row { display: flex; align-items: center; justify-content: space-between; font-size: 13px; padding: 6px 10px; background: var(--glass-bg); border-radius: 8px; border: 1px solid var(--border-subtle); }
.prov-model-name { color: var(--text-primary); font-weight: 500; flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; margin-right: 8px; }
.prov-model-score { font-weight: 700; font-variant-numeric: tabular-nums; color: var(--color-primary); flex-shrink: 0; }
.prov-model-tests { font-size: 11px; color: var(--text-secondary); flex-shrink: 0; margin-left: 8px; }
.prov-response-badge { font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 99px; flex-shrink: 0; margin-left: 6px; }
.prov-response-badge.full { background: rgba(16,185,129,0.15); color: #059669; }
.prov-response-badge.partial { background: rgba(245,158,11,0.15); color: #d97706; }
.prov-response-badge.low { background: rgba(239,68,68,0.15); color: #dc2626; }

/* Score lines (search page) */
.score-line { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.score-line-label { font-size: 12px; color: var(--text-secondary); min-width: 72px; flex-shrink: 0; }
.score-line-bar { flex: 1; height: 5px; background: var(--bar-empty); border-radius: 3px; overflow: hidden; }
.score-line-fill { height: 100%; border-radius: 3px; display: block; transition: width 0.4s; }
.score-line-val { font-size: 12px; font-weight: 600; font-variant-numeric: tabular-nums; color: var(--text-primary); min-width: 28px; text-align: right; }
.fill-quality { background: linear-gradient(90deg, #6366f1, #8b5cf6); }
.fill-code    { background: linear-gradient(90deg, #6366f1, #8b5cf6); }
.fill-mmlu    { background: linear-gradient(90deg, #06b6d4, #3b82f6); }
.fill-reason  { background: linear-gradient(90deg, #3b82f6, #6366f1); }
.fill-trans   { background: linear-gradient(90deg, #10b981, #06b6d4); }
.fill-speed   { background: linear-gradient(90deg, #f59e0b, #10b981); }

/* Search card specifics */
.model-header { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 14px; gap: 10px; }
.model-name { font-size: 15px; font-weight: 700; color: var(--text-primary); margin-bottom: 3px; }
.model-provider { font-size: 12px; color: var(--text-secondary); }
.rank-badge { font-size: 13px; font-weight: 700; color: var(--color-primary); flex-shrink: 0; }
.size-small  { background: var(--badge-small-bg);  color: var(--badge-small-txt);  }
.size-medium { background: var(--badge-medium-bg); color: var(--badge-medium-txt); }
.size-large  { background: var(--badge-large-bg);  color: var(--badge-large-txt);  }
.size-unknown{ background: var(--badge-small-bg);  color: var(--badge-small-txt);  }

/* ─── Unified card appearance across all pages ─────────────────────────── */
/* Make surface-based cards consistent with glass model cards on index */
.provider-card,
.cat-card,
.stat-table,
.search-result-card {
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-color: var(--glass-border);
  box-shadow: 0 2px 16px rgba(0,0,0,0.18), 0 1px 0 rgba(255,255,255,0.05) inset;
}

/* Light mode overrides */
[data-theme="light"] .provider-card,
[data-theme="light"] .cat-card,
[data-theme="light"] .stat-table,
[data-theme="light"] .search-result-card {
  background: var(--glass-bg);
  box-shadow: 0 2px 12px rgba(0,0,0,0.07);
}

/* ─── size-filter-row light mode ────────────────────────────────────────── */
[data-theme="light"] .size-filter-row {
  background: var(--bg);
}

/* ─── Mobile: 2-col model test cards (≤460px extra compact) ─────────────── */
@media (max-width: 460px) {
  .grid-cards { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .model-card { padding: 8px; }
  .card-score-footer { padding: 6px 0; font-size: 10px; }
  .score-block { gap: 4px; margin-bottom: 8px; }
  .card-header { margin-bottom: 8px; }
  .rank-num { font-size: 10px; padding: 2px 6px; }
  .cmp-chip { display: none; } /* hide compare on very small screens */
}

/* ═══════════════════════════════════════════════════════════════════════════
   PRODUCT SWITCHER — 3-bar icon between logo image and product name
   Opens dropdown with Proof / Lab links
   ═══════════════════════════════════════════════════════════════════════════ */
.logo {
  padding-left: 0 !important;
  margin-left: 0 !important;
}
.logo-icon {
  margin-left: 0 !important;
}
.header-content {
  padding-left: 0 !important;
}

/* product-switcher removed — hidden */
.product-switcher { display: none !important; }
.product-switcher-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 28px;
  height: 28px;
  padding: 5px;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: 6px;
  transition: background 0.15s;
}
.product-switcher-btn:hover { background: var(--surface); }
.product-switcher-btn span {
  display: block;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: background 0.2s;
}
.product-switcher-btn:hover span { background: var(--text-primary); }

.product-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: -4px;
  min-width: 140px;
  background: var(--sticky-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  z-index: 200;
  overflow: hidden;
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
  transition: opacity 0.18s, transform 0.18s;
}
.product-dropdown.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.product-dropdown-label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  padding: 10px 14px 6px;
}
.product-dropdown a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}
.product-dropdown a:hover {
  background: var(--surface);
  color: var(--text-primary);
}
.product-dropdown a.active {
  color: var(--accent);
}
.product-dropdown a .prod-icon {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 700;
  font-family: var(--font-mono);
  flex-shrink: 0;
}
.prod-icon.proof { background: rgba(99,102,241,0.15); color: #818cf8; }
.prod-icon.lab   { background: rgba(16,185,129,0.15); color: #34d399; }

/* ═══════════════════════════════════════════════════════════════════════════
   LEFT SIDEBAR NAVIGATION (shared by Proof & Lab layouts)
   ═══════════════════════════════════════════════════════════════════════════ */
.app-layout {
  display: flex;
  min-height: calc(100vh - 60px);
}

.left-sidebar {
  width: 52px;
  background: rgba(13,17,23,0.97);
  border-right: 1px solid var(--border);
  position: fixed;
  left: 0;
  top: 60px;
  height: calc(100vh - 60px);
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  padding-bottom: 24px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
  transition: width 0.2s ease;
  z-index: 50;
  will-change: width;
  /* Shadow that bleeds onto content when expanded */
  box-shadow: 4px 0 20px rgba(0,0,0,0.35), 0 8px 24px rgba(0,0,0,0.2);
}
.left-sidebar.expanded {
  width: 220px;
}
.left-sidebar::-webkit-scrollbar { width: 4px; }
.left-sidebar::-webkit-scrollbar-track { background: transparent; }
.left-sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* Section switcher at top of sidebar */
/* Product switcher buttons at top of sidebar */
.sidebar-product-btns {
  display: flex;
  gap: 8px;
  padding: 12px 12px 10px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.sidebar-product-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 8px 6px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 700;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--text-secondary);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: color 0.15s, background 0.15s, border-color 0.15s, box-shadow 0.15s;
}
.sidebar-product-btn:hover {
  color: var(--text-primary);
  background: var(--surface-raised, rgba(255,255,255,0.06));
}
.sidebar-product-btn.active.proof {
  color: #818cf8;
  background: rgba(99,102,241,0.12);
  border-color: rgba(99,102,241,0.35);
  box-shadow: 0 0 0 1px rgba(99,102,241,0.15);
}
.sidebar-product-btn.active.lab {
  color: #34d399;
  background: rgba(52,211,153,0.12);
  border-color: rgba(52,211,153,0.35);
  box-shadow: 0 0 0 1px rgba(52,211,153,0.15);
}
/* keep prod-icon sizing inside btn */
.sidebar-product-btn .prod-icon {
  width: 20px;
  height: 20px;
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 700;
  font-family: var(--font-mono);
  flex-shrink: 0;
}

/* ── Collapsed sidebar: semi-transparent icons only, overlay on hover ── */

/* Hide text labels when collapsed */
.left-sidebar .btn-label,
.left-sidebar .link-label {
  display: none;
  white-space: nowrap;
  opacity: 0;
  transition: opacity 0.15s ease;
}
.left-sidebar.expanded .btn-label,
.left-sidebar.expanded .link-label {
  display: inline-block;
  opacity: 1;
}

/* Icons semi-transparent when collapsed */
.left-sidebar:not(.expanded) .sidebar-link svg,
.left-sidebar:not(.expanded) .sidebar-topnav-link svg,
.left-sidebar:not(.expanded) .sidebar-product-btn svg {
  opacity: 0.45;
  transition: opacity 0.15s ease;
}
.left-sidebar:not(.expanded) .sidebar-link:hover svg,
.left-sidebar:not(.expanded) .sidebar-topnav-link:hover svg,
.left-sidebar:not(.expanded) .sidebar-product-btn:hover svg {
  opacity: 0.85;
}
.left-sidebar:not(.expanded) .sidebar-link.active svg {
  opacity: 1;
}

/* Product buttons: column when collapsed, row when expanded */
.left-sidebar .sidebar-product-btns {
  flex-direction: column;
  padding: 10px 6px;
  gap: 6px;
}
.left-sidebar.expanded .sidebar-product-btns {
  flex-direction: row;
  padding: 12px 12px 10px;
  gap: 8px;
}

/* Center icons when collapsed */
.left-sidebar .sidebar-product-btn {
  justify-content: center;
  gap: 0;
  overflow: hidden;
}
.left-sidebar.expanded .sidebar-product-btn {
  gap: 7px;
}

/* Nav links: center icon when collapsed */
.left-sidebar .sidebar-topnav-link {
  justify-content: center;
  padding: 10px 0;
  gap: 0;
  position: relative;
  overflow: hidden;
}
.left-sidebar.expanded .sidebar-topnav-link {
  justify-content: flex-start;
  padding: 7px 14px 7px 16px;
  gap: 8px;
}

/* Nav section */
.sidebar-nav { flex: 1; padding: 8px 0; }
.sidebar-section {
  margin-bottom: 2px;
}
.sidebar-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 14px 7px 16px;
  cursor: pointer;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  transition: color 0.15s;
  user-select: none;
  border-radius: 0;
  overflow: hidden;
  white-space: nowrap;
}

/* Hide section header text when collapsed */
.left-sidebar:not(.expanded) .sidebar-section-header span {
  display: none;
}
.left-sidebar:not(.expanded) .sidebar-section-header .chevron {
  display: none;
}
.left-sidebar:not(.expanded) .sidebar-section-header {
  padding: 4px 0;
  height: 4px;
  min-height: 0;
  pointer-events: none;
}

/* Center icons in links when collapsed */
.left-sidebar:not(.expanded) .sidebar-link {
  justify-content: center;
  padding: 8px 0;
}
.left-sidebar:not(.expanded) .sidebar-link::before {
  display: none;
}
.sidebar-section-header:hover { color: var(--text-secondary); }
.sidebar-section-header .chevron {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  transition: transform 0.2s;
  opacity: 0.5;
}
.sidebar-section.open .chevron { transform: rotate(90deg); }

.sidebar-items {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.2s ease;
}
.sidebar-section.open .sidebar-items { max-height: 600px; }

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px 6px 28px;
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 0;
  transition: background 0.12s, color 0.12s;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  position: relative;
}
.sidebar-link::before {
  content: '';
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 100%;
  background: var(--border-subtle);
}
.sidebar-link:hover { background: var(--surface); color: var(--text-primary); }
.sidebar-link.active {
  color: var(--text-primary);
  background: var(--accent-dim);
  font-weight: 500;
}
.sidebar-link.active::before { background: var(--accent); }

/* Sub-sub items */
.sidebar-sub-section { }
.sidebar-sub-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 14px 6px 36px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-tertiary);
  cursor: pointer;
  transition: color 0.15s;
  user-select: none;
}
.sidebar-sub-header:hover { color: var(--text-secondary); }
.sidebar-sub-header .chevron { width: 12px; height: 12px; opacity: 0.4; transition: transform 0.2s; }
.sidebar-sub-section.open .chevron { transform: rotate(90deg); }
.sidebar-sub-items { overflow: hidden; max-height: 0; transition: max-height 0.2s; }
.sidebar-sub-section.open .sidebar-sub-items { max-height: 400px; }
.sidebar-sublink {
  display: block;
  padding: 5px 14px 5px 48px;
  font-size: 12px;
  color: var(--text-tertiary);
  text-decoration: none;
  transition: color 0.12s, background 0.12s;
}
.sidebar-sublink:hover { color: var(--text-secondary); background: var(--surface); }
.sidebar-sublink.active { color: var(--accent); font-weight: 500; }

/* Proof top nav links inside sidebar */
.sidebar-topnav-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px 7px 16px;
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: background 0.12s, color 0.12s;
  white-space: nowrap;
}
.sidebar-topnav-link:hover { background: var(--surface); color: var(--text-primary); }
.sidebar-topnav-link.active { color: var(--text-primary); font-weight: 500; background: var(--accent-dim); }

/* divider in sidebar */
.sidebar-divider {
  height: 1px;
  background: var(--border-subtle);
  margin: 8px 0;
}

/* main content area (right of sidebar) */
/* Sidebar now OVERLAYS content — no margin shift needed */
.sidebar-main {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  margin-left: 52px; /* only offset by collapsed width so icons don't cover edge content */
  position: relative; /* Fix: chat-panel position:absolute must be contained here, not viewport */
}

/* When sidebar is expanded it overlays — no margin change */
/* Sidebar overlays — sidebar-main margin stays fixed at 52px always */
.app-layout.sidebar-expanded .sidebar-main {
  margin-left: 52px;
}

/* Lab accent color overrides */
.lab-accent { color: #34d399 !important; }
.lab-accent-bg { background: rgba(16,185,129,0.12) !important; border-color: rgba(16,185,129,0.25) !important; }

/* Lab hero title */
.lab-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  background: rgba(16,185,129,0.12);
  border: 1px solid rgba(16,185,129,0.25);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #34d399;
  margin-bottom: 12px;
}

/* ═══════════════════════════════════════════════════════════════════════════
   MOBILE: collapse sidebar into top drawer on small screens
   ═══════════════════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  .left-sidebar {
    left: -220px;
    width: 220px;
    transition: left 0.2s ease;
    box-shadow: 4px 0 24px rgba(0,0,0,0.5);
  }
  .left-sidebar.expanded { width: 220px; }
  .left-sidebar.open { left: 0; }
  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 60px 0 0 0;
    background: rgba(0,0,0,0.45);
    z-index: 99;
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
  }
  .sidebar-overlay.open { display: block; }
  .sidebar-main { padding: 0; margin-left: 0 !important; max-width: 100vw; overflow-x: hidden; }
}
@media (min-width: 769px) {
  .sidebar-overlay { display: none !important; }
}

/* sidebar footer (about link) */
.sidebar-footer-links {
  margin-top: auto;
  padding-top: 8px;
  border-top: 1px solid var(--border-subtle);
}