/* ============================================================
   HumorGen — world-class single-page site
   Theme: Anthropic-inspired warm cream / clay, editorial serif
   ============================================================ */

:root {
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Fraunces', Georgia, 'Times New Roman', serif;

  --radius: 16px;
  --radius-sm: 12px;
  --maxw: 1080px;

  --clay: #0d9488;
  --clay-bright: #14b8a6;
  --clay-deep: #0f766e;
  --accent-fill: #0f766e;
  --accent-fill-hover: #115e59;

  --grad: linear-gradient(120deg, var(--clay), var(--clay-bright));
  --grad-soft: linear-gradient(135deg, rgba(13,148,136,.10), rgba(20,184,166,.07));

  --ease: cubic-bezier(.22,.61,.36,1);
  --t: .4s var(--ease);
}

/* DARK — near-black, teal accent */
[data-theme="dark"] {
  --bg: #0b0f0e;
  --bg-2: #131817;
  --surface: rgba(255,255,255,.04);
  --surface-2: rgba(255,255,255,.07);
  --border: rgba(255,255,255,.10);
  --border-strong: rgba(255,255,255,.20);
  --text: #f3f4f6;
  --text-dim: #c4c8cc;
  --text-faint: #7b8088;
  --shadow: 0 18px 50px -24px rgba(0,0,0,.7);
  --nav-bg: rgba(11,15,14,.72);
  --clay: #2dd4bf;
  --clay-bright: #5eead4;
  --clay-deep: #14b8a6;
  --accent-fill: #14b8a6;
  --accent-fill-hover: #2dd4bf;
  --grad: linear-gradient(120deg, #14b8a6, #2dd4bf);
  --grad-soft: linear-gradient(135deg, rgba(20,184,166,.12), rgba(45,212,191,.08));
}

/* LIGHT — clean neutral (default) */
[data-theme="light"] {
  --bg: #f9fafb;
  --bg-2: #f3f4f6;
  --surface: rgba(15,23,42,.035);
  --surface-2: rgba(15,23,42,.06);
  --border: rgba(15,23,42,.10);
  --border-strong: rgba(15,23,42,.18);
  --text: #111827;
  --text-dim: #4b5563;
  --text-faint: #9ca3af;
  --shadow: 0 18px 50px -24px rgba(15,23,42,.16);
  --nav-bg: rgba(249,250,251,.72);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background var(--t), color var(--t);
}

a { color: inherit; text-decoration: none; }
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -.01em;
  line-height: 1.15;
  font-optical-sizing: auto;
}

/* ---------- ambient background ---------- */
.ambient { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.blob { position: absolute; border-radius: 50%; filter: blur(120px); opacity: .42; }
.blob-1 { width: 560px; height: 560px; top: -160px; left: -120px; background: var(--clay); }
.blob-2 { width: 520px; height: 520px; top: 8%; right: -160px; background: #5eead4; }
.blob-3 { width: 480px; height: 480px; bottom: -200px; left: 32%; background: var(--clay-bright); opacity: .28; }
[data-theme="dark"] .blob { opacity: .26; }
[data-theme="dark"] .blob-3 { opacity: .18; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  font-weight: 600; font-size: .95rem;
  padding: .8rem 1.4rem; border-radius: 999px;
  border: 1px solid transparent; cursor: pointer;
  transition: transform var(--t), box-shadow var(--t), background var(--t), border-color var(--t);
  white-space: nowrap;
}
.btn-sm { padding: .55rem 1rem; font-size: .85rem; }
.btn-primary { background: var(--accent-fill); color: #fff; box-shadow: 0 8px 24px -10px rgba(13,148,136,.45); }
.btn-primary:hover { transform: translateY(-2px); background: var(--accent-fill-hover); box-shadow: 0 14px 34px -10px rgba(13,148,136,.55); }
[data-theme="dark"] .btn-primary { color: #042f2e; }
.btn-ghost { border-color: var(--border-strong); color: var(--text); background: var(--surface); }
.btn-ghost:hover { background: var(--surface-2); transform: translateY(-2px); }

/* ---------- nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: flex; align-items: center; gap: 1.5rem;
  padding: .9rem clamp(1rem, 4vw, 2.5rem);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  background: var(--nav-bg);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t), background var(--t);
}
.nav.scrolled { border-bottom-color: var(--border); }
.brand { display: flex; align-items: center; flex-shrink: 0; }
.brand-logo { height: 46px; width: auto; display: block; object-fit: contain; }
.brand-logo--foot { height: 56px; }
.nav-links { display: flex; gap: 1.6rem; margin-left: auto; }
.nav-links a { color: var(--text-dim); font-size: .92rem; font-weight: 500; transition: color var(--t); }
.nav-links a:hover { color: var(--text); }
.nav-actions { display: flex; align-items: center; gap: .8rem; }
.theme-toggle {
  display: grid; place-items: center;
  width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  cursor: pointer; transition: background var(--t), transform var(--t);
}
.theme-toggle:hover { background: var(--surface-2); transform: rotate(-15deg); }
.theme-toggle svg { fill: none; stroke: currentColor; stroke-width: 2; }
.icon-moon { display: none; }
[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: block; }

/* ---------- layout ---------- */
main { padding-top: 88px; }
.section { max-width: var(--maxw); margin: 0 auto; padding: clamp(5rem, 11vw, 8.5rem) clamp(1rem, 4vw, 2.5rem); border-top: 1px solid var(--border); }
.section-head { max-width: 640px; margin-bottom: 3.5rem; }
.kicker {
  display: inline-block; font-size: .8rem; font-weight: 600; letter-spacing: .14em;
  text-transform: uppercase; color: var(--clay); margin-bottom: .8rem;
}
.section-head h2 { font-size: clamp(2rem, 4.5vw, 3rem); margin-bottom: .8rem; }
.section-head p { color: var(--text-dim); font-size: 1.1rem; }
.grad {
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- hero ---------- */
.hero { max-width: var(--maxw); margin: 0 auto; padding: clamp(4rem, 9vw, 7rem) clamp(1rem, 4vw, 2.5rem) 2rem; text-align: center; }
.pill {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .4rem .9rem; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--border);
  font-size: .82rem; color: var(--text-dim); margin-bottom: 1.8rem;
}
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--clay); box-shadow: 0 0 0 4px rgba(13,148,136,.18); }
.hero-title { font-size: clamp(2.8rem, 7vw, 5.2rem); font-weight: 500; margin-bottom: 1.4rem; }
.hero-sub { max-width: 620px; margin: 0 auto 2.2rem; color: var(--text-dim); font-size: 1.2rem; }
.hero-cta { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ticker */
.ticker {
  margin: 3.5rem auto 0; max-width: 720px; text-align: left;
  padding: 1rem 1.3rem; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border);
  font-family: var(--font-display); display: flex; align-items: center; gap: .8rem;
  box-shadow: var(--shadow);
}
.ticker-label {
  font-size: .68rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--text-faint); border-right: 1px solid var(--border); padding-right: .8rem;
}
.ticker-text { color: var(--text); font-size: 1rem; }
.cursor { color: var(--clay); animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* ---------- marquee strip ---------- */
.strip { border-block: 1px solid var(--border); background: var(--surface); overflow: hidden; }
.marquee { display: flex; overflow: hidden; }
.marquee-track {
  display: flex; gap: 2rem; padding: 1.1rem 0; white-space: nowrap;
  font-family: var(--font-display); font-weight: 600; color: var(--text-dim);
  animation: scrollx 28s linear infinite;
}
.marquee-track span:nth-child(odd) { color: var(--text); }
@keyframes scrollx { to { transform: translateX(-50%); } }

/* ---------- cards ---------- */
.grid { display: grid; gap: 1.6rem; }
.cards { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.card {
  position: relative; padding: 2rem 1.8rem; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border);
  transition: transform var(--t), border-color var(--t), background var(--t);
}
.card:hover { transform: translateY(-6px); border-color: var(--border-strong); background: var(--surface-2); }
.card-icon { font-size: 2rem; margin-bottom: 1rem; }
.card h3 { font-size: 1.4rem; margin-bottom: .3rem; }
.card-tag { color: var(--clay); font-size: .85rem; font-weight: 600; margin-bottom: .9rem; }
.card p { color: var(--text-dim); margin-bottom: 1.2rem; }
.persona-fields { display: flex; flex-direction: column; gap: .9rem; margin-top: .1rem; }
.pf { display: flex; flex-direction: column; gap: .25rem; }
.pf span { font-size: .66rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--text-faint); }
.pf p { color: var(--text-dim); font-size: .92rem; line-height: 1.5; margin: 0; }
.mini { list-style: none; display: flex; flex-direction: column; gap: .5rem; }
.mini li { color: var(--text-dim); font-size: .92rem; padding-left: 1.4rem; position: relative; }
.mini li::before { content: '✦'; position: absolute; left: 0; color: var(--clay-bright); }
.card.featured { border-color: var(--border-strong); background: var(--grad-soft); box-shadow: var(--shadow); }
.badge {
  position: absolute; top: 1.2rem; right: 1.2rem;
  font-size: .68rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
  padding: .3rem .7rem; border-radius: 999px; background: var(--accent-fill); color: #fff;
}
[data-theme="dark"] .badge { color: #042f2e; }

/* ---------- demo ---------- */
.demo {
  max-width: 820px; margin: 0 auto; padding: 2rem;
  border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.demo-controls { display: grid; grid-template-columns: 1fr 1fr auto; gap: 1rem; margin-bottom: 1.4rem; }
.field { display: flex; flex-direction: column; gap: .4rem; }
.field span { font-size: .78rem; color: var(--text-faint); font-weight: 600; letter-spacing: .06em; text-transform: uppercase; }
.field input, .field select {
  padding: .7rem .9rem; border-radius: var(--radius-sm);
  background: var(--bg-2); border: 1px solid var(--border); color: var(--text);
  font-family: inherit; font-size: .95rem; transition: border-color var(--t);
}
.field input:focus, .field select:focus { outline: none; border-color: var(--clay); }
.demo-controls .btn { align-self: flex-end; }
.demo-output {
  padding: 1.3rem; border-radius: var(--radius-sm);
  background: var(--bg-2); border: 1px dashed var(--border); min-height: 110px;
}
.output-label { font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; color: var(--text-faint); }
.demo-output p { margin-top: .5rem; font-size: 1.1rem; }
.demo-note { text-align: center; color: var(--text-faint); font-size: .82rem; margin-top: 1rem; }

/* ---------- features ---------- */
.feat { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.feat-item {
  padding: 1.6rem; border-radius: var(--radius); border: 1px solid var(--border);
  background: var(--surface); transition: transform var(--t), border-color var(--t);
}
.feat-item:hover { transform: translateY(-4px); border-color: var(--border-strong); }
.feat-ico { font-size: 1.6rem; margin-bottom: .8rem; }
.feat-item h3 { font-size: 1.15rem; margin-bottom: .4rem; }
.feat-item p { color: var(--text-dim); font-size: .95rem; }

/* ---------- steps ---------- */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.6rem; }
.step {
  padding: 1.8rem; border-radius: var(--radius); border: 1px solid var(--border);
  background: var(--surface); position: relative; overflow: hidden;
}
.step::before { content: ''; position: absolute; inset: 0; background: var(--grad-soft); opacity: 0; transition: opacity var(--t); }
.step:hover::before { opacity: 1; }
.step > * { position: relative; }
.step-num { font-family: var(--font-display); font-weight: 700; font-size: 2.2rem; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.step h3 { font-size: 1.15rem; margin: .6rem 0 .4rem; }
.step p { color: var(--text-dim); font-size: .95rem; }

/* ---------- stats ---------- */
.stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1.5rem; padding: 2.5rem clamp(1rem, 4vw, 2.5rem);
  border-radius: var(--radius); background: var(--grad-soft); border: 1px solid var(--border);
}
.stat { text-align: center; }
.stat-num { display: block; font-family: var(--font-display); font-weight: 700; font-size: 2.4rem; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat-label { color: var(--text-dim); font-size: .88rem; }

/* ---------- faq ---------- */
.faq { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: .8rem; }
details {
  padding: 1.2rem 1.4rem; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--surface);
  transition: border-color var(--t);
}
details[open] { border-color: var(--border-strong); }
summary { cursor: pointer; font-weight: 600; font-family: var(--font-display); list-style: none; display: flex; justify-content: space-between; align-items: center; }
summary::-webkit-details-marker { display: none; }
summary::after { content: '+'; color: var(--clay); font-size: 1.3rem; transition: transform var(--t); }
details[open] summary::after { transform: rotate(45deg); }
details p { color: var(--text-dim); margin-top: .8rem; font-size: .96rem; }

/* ---------- cta band ---------- */
.cta-band {
  max-width: var(--maxw); margin: 2rem auto; padding: clamp(3rem, 7vw, 5rem);
  text-align: center; border-radius: var(--radius);
  background: var(--bg-2); color: var(--text);
  border: 1px solid var(--border); box-shadow: var(--shadow);
}
.cta-band h2 { font-size: clamp(1.9rem, 4vw, 2.8rem); margin-bottom: .6rem; }
.cta-band p { color: var(--text-dim); margin-bottom: 1.8rem; }
.cta-band .btn-ghost { background: transparent; border-color: var(--border-strong); color: var(--text); }
.cta-band .btn-ghost:hover { background: var(--surface); }

/* ---------- footer ---------- */
.footer { border-top: 1px solid var(--border); padding: 3rem clamp(1rem, 4vw, 2.5rem) 2rem; max-width: var(--maxw); margin: 3rem auto 0; }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem; }
.foot-tag { color: var(--text-dim); margin-top: .8rem; font-size: .9rem; }
.foot-col { display: flex; flex-direction: column; gap: .6rem; }
.foot-col h4 { font-size: .8rem; text-transform: uppercase; letter-spacing: .1em; color: var(--text-faint); margin-bottom: .3rem; }
.foot-col a { color: var(--text-dim); font-size: .92rem; transition: color var(--t); }
.foot-col a:hover { color: var(--text); }
.foot-bottom { display: flex; justify-content: space-between; margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--border); color: var(--text-faint); font-size: .85rem; }

/* ---------- framework emphasis ---------- */
.framework .section-head { max-width: 760px; }
.big-head { font-size: clamp(2.2rem, 5.2vw, 3.6rem) !important; font-weight: 600 !important; line-height: 1.1; }
.accent-strong { color: var(--clay); font-weight: 600; }
.framework-lede {
  font-size: 1.25rem; line-height: 1.7; color: var(--text);
  padding: 1.6rem 1.8rem; border-left: 3px solid var(--clay);
  background: var(--grad-soft); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  max-width: 820px; margin-bottom: 3rem;
}
strong { font-weight: 600; color: var(--text); }

/* ---------- key finding ---------- */
.finding {
  margin-top: 3.5rem; max-width: 820px; padding: 1.8rem 2rem;
  border-radius: var(--radius); border: 1px solid var(--border);
  background: var(--grad-soft); position: relative; overflow: hidden;
}
.finding::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 4px; background: var(--clay); }
.finding-tag {
  display: inline-block; font-size: .72rem; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase; color: var(--clay); margin-bottom: .6rem;
}
.finding p { color: var(--text); font-size: 1.08rem; line-height: 1.7; }
.finding strong { color: var(--clay); font-weight: 600; }

/* ---------- usage ---------- */
.usage { max-width: 860px; margin: 0 auto; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); background: var(--surface); }
.usage-tabs { display: flex; gap: .25rem; padding: .5rem .5rem 0; background: var(--surface-2); border-bottom: 1px solid var(--border); }
.usage-tab {
  font: inherit; font-size: .85rem; font-weight: 600; padding: .6rem 1rem; cursor: pointer;
  border: none; background: transparent; color: var(--text-faint); border-radius: 8px 8px 0 0;
  transition: color var(--t), background var(--t);
}
.usage-tab:hover { color: var(--text-dim); }
.usage-tab.active { color: var(--text); background: var(--bg-2); }
.usage-code { margin: 0; padding: 1.4rem 1.6rem; overflow-x: auto; display: block; }
.usage-code.active { display: block; }
.usage-code[hidden] { display: none; }
.usage-code code { font-family: 'JetBrains Mono', monospace; font-size: .82rem; line-height: 1.65; color: var(--text-dim); white-space: pre; }

/* ---------- prose / problem ---------- */
.prose { max-width: 720px; font-size: 1.12rem; color: var(--text-dim); display: flex; flex-direction: column; gap: 1.4rem; }
.prose p { line-height: 1.75; }
.callout {
  padding: 1.4rem 1.6rem; border-radius: var(--radius); border: 1px solid var(--border);
  background: var(--grad-soft); color: var(--text); font-size: 1.05rem;
}
.callout em { color: var(--clay); font-style: normal; font-weight: 600; }
.lede { max-width: 760px; color: var(--text-dim); font-size: 1.15rem; line-height: 1.75; margin-bottom: 2.4rem; }
.inline-link { color: var(--clay); font-weight: 500; border-bottom: 1px solid rgba(13,148,136,.4); transition: border-color var(--t); }
.inline-link:hover { border-bottom-color: var(--clay); }

/* ---------- split / side-by-side boxes ---------- */
.split { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.6rem; margin-top: 1.5rem; }
.split-card {
  padding: 1.8rem; border-radius: var(--radius); border: 1px solid var(--border);
  background: var(--surface); display: flex; flex-direction: column; gap: .7rem;
  transition: border-color var(--t), transform var(--t);
}
.split-card:hover { border-color: var(--border-strong); transform: translateY(-3px); }
.split-card .sc-tag { font-size: .72rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--clay); }
.split-card h3 { font-size: 1.2rem; line-height: 1.3; }
.split-card p { color: var(--text-dim); font-size: .98rem; line-height: 1.65; }
.split-card .vs { align-self: center; font-family: var(--font-display); color: var(--text-faint); font-size: .8rem; letter-spacing: .15em; }

/* three-up theory row */
.theory { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.6rem; margin-top: 3.5rem; }
.theory-card { padding: 1.5rem 1.6rem; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--bg-2); }
.theory-card h4 { font-family: var(--font-display); font-size: 1.05rem; margin-bottom: .4rem; color: var(--text); }
.theory-card .th-tag { font-size: .72rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--clay); display: block; margin-bottom: .5rem; }
.theory-card p { color: var(--text-dim); font-size: .92rem; line-height: 1.6; }
.theory-note { max-width: 760px; color: var(--text-dim); font-size: .95rem; margin-top: 2rem; line-height: 1.7; }

/* DPO vs O-GRPO compare */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 1.6rem; margin-top: 3.5rem; }
.compare-col { padding: 1.8rem; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); }
.compare-col h3 { font-size: 1.15rem; margin-bottom: .3rem; }
.compare-col .cm-sub { font-size: .8rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--clay); margin-bottom: 1rem; }
.compare-col ul { list-style: none; display: flex; flex-direction: column; gap: .55rem; }
.compare-col li { color: var(--text-dim); font-size: .95rem; padding-left: 1.3rem; position: relative; line-height: 1.55; }
.compare-col li::before { content: ''; position: absolute; left: 0; top: .55rem; width: 6px; height: 6px; border-radius: 50%; background: var(--clay); }
@media (max-width: 640px) { .compare { grid-template-columns: 1fr; } }

/* pun-brief example */
.ex-box { margin-top: 2.6rem; border-radius: var(--radius); border: 1px solid var(--border); overflow: hidden; background: var(--surface); }
.ex-head { padding: 1rem 1.4rem; border-bottom: 1px solid var(--border); background: var(--surface-2); font-size: .74rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--text-faint); }
.ex-body { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.ex-cell { padding: 1.3rem 1.4rem; border-right: 1px solid var(--border); }
.ex-cell:last-child { border-right: none; }
.ex-cell .ek { font-size: .72rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--clay); margin-bottom: .4rem; }
.ex-cell .ev { color: var(--text); font-size: 1rem; line-height: 1.55; }
.ex-cell .ev code { font-family: 'JetBrains Mono', monospace; font-size: .85rem; }
.ex-out { padding: 1.3rem 1.4rem; border-top: 1px solid var(--border); background: var(--grad-soft); }
.ex-out .ek { font-size: .72rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--clay); margin-bottom: .4rem; }
.ex-out .ev { color: var(--text); font-style: italic; font-size: 1.05rem; }

.sub-note { max-width: 760px; color: var(--text-dim); font-size: .95rem; margin-top: 1.5rem; line-height: 1.7; }


/* ---------- model tables ---------- */
.model-group { margin-bottom: 2.6rem; }
.model-group-head { display: flex; flex-direction: column; gap: .3rem; margin-bottom: 1rem; }
.model-group-head h3 { font-size: 1.3rem; }
.model-meta { color: var(--text-dim); font-size: .92rem; }
.table-wrap {
  overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border);
  background: var(--surface);
}
table { width: 100%; border-collapse: collapse; min-width: 560px; }
thead th {
  text-align: left; font-size: .76rem; text-transform: uppercase; letter-spacing: .08em;
  color: var(--text-faint); font-weight: 600; padding: 1rem 1.2rem; border-bottom: 1px solid var(--border);
}
tbody td { padding: .9rem 1.2rem; border-bottom: 1px solid var(--border); font-size: .95rem; color: var(--text-dim); }
tbody tr:last-child td { border-bottom: none; }
tbody tr { transition: background var(--t); }
tbody tr:hover { background: var(--surface-2); }
td code, .paper code { font-family: 'JetBrains Mono', monospace; font-size: .86rem; color: var(--text); background: var(--surface-2); padding: .15rem .4rem; border-radius: 6px; }
th.center, td.center { text-align: center; }

/* ---------- leaderboards ---------- */
.bench-tabs {
  display: inline-flex; gap: .35rem; padding: .35rem;
  border-radius: 999px; border: 1px solid var(--border);
  background: var(--surface); margin-bottom: 1.4rem;
}
.bench-tab {
  font-family: var(--font-sans); font-size: .88rem; font-weight: 600;
  padding: .55rem 1.1rem; border-radius: 999px; border: none;
  background: transparent; color: var(--text-dim); cursor: pointer;
  transition: background var(--t), color var(--t);
}
.bench-tab.active { background: var(--bg-2); color: var(--text); box-shadow: var(--shadow); }
.bench-tab:hover:not(.active) { color: var(--text); }
.bench-panel { margin-bottom: .6rem; }
.bench-meta {
  display: flex; flex-direction: column; gap: .35rem;
  margin-bottom: 1rem; color: var(--text-dim); font-size: .92rem;
}
.bench-note { color: var(--text-dim); font-size: .88rem; }
.leaderboard table { min-width: 640px; }
.leaderboard td.num, .leaderboard th.num { text-align: right; font-variant-numeric: tabular-nums; font-family: 'JetBrains Mono', monospace; font-size: .88rem; }
.leaderboard td.ci { font-size: .84rem; color: var(--text-faint); font-variant-numeric: tabular-nums; }
.leaderboard tbody tr.humorgen-row { background: rgba(13,148,136,.08); }
.leaderboard tbody tr.humorgen-row td:first-child + td { color: var(--text); font-weight: 600; }
.leaderboard tbody tr.humorgen-row td.num { color: var(--clay-deep); font-weight: 600; }
[data-theme="dark"] .leaderboard tbody tr.humorgen-row { background: rgba(45,212,191,.12); }
[data-theme="dark"] .leaderboard tbody tr.humorgen-row td.num { color: var(--clay-bright); }
.leaderboard tbody tr.top-row td:first-child + td { font-weight: 600; color: var(--text); }

/* ---------- joker ---------- */
.joker-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.6rem; }
.joker-card { padding: 1.8rem; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); }
.joker-card h3 { font-size: 1.15rem; margin-bottom: .6rem; }
.joker-card p { color: var(--text-dim); font-size: .98rem; }

/* ---------- papers ---------- */
.papers { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.paper { padding: 1.8rem; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); display: flex; flex-direction: column; gap: .7rem; transition: transform var(--t), border-color var(--t); }
.paper:hover { transform: translateY(-4px); border-color: var(--border-strong); }
.paper-venue { font-size: .72rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--clay); }
.paper h3 { font-size: 1.1rem; line-height: 1.35; }
.paper-auth { color: var(--text-dim); font-size: .9rem; }
.paper .btn { align-self: flex-start; margin-top: auto; }

/* ---------- citation ---------- */
.cite { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 1.4rem; }
.cite-block { border-radius: var(--radius); border: 1px solid var(--border); overflow: hidden; background: var(--surface); }
.cite-head { display: flex; justify-content: space-between; align-items: center; padding: .7rem 1rem; border-bottom: 1px solid var(--border); background: var(--surface-2); }
.cite-head span { font-size: .74rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--text-faint); }
.copy-btn {
  font-size: .78rem; font-weight: 600; padding: .3rem .7rem; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg-2); color: var(--text-dim); cursor: pointer;
  transition: color var(--t), border-color var(--t);
}
.copy-btn:hover { color: var(--text); border-color: var(--border-strong); }
.copy-btn.copied { color: var(--clay-deep); border-color: var(--clay); }
.cite-block pre { margin: 0; padding: 1.2rem; overflow-x: auto; }
.cite-block code { font-family: 'JetBrains Mono', monospace; font-size: .82rem; line-height: 1.6; color: var(--text-dim); }

/* ---------- reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .nav-links { display: none; }
  .demo-controls { grid-template-columns: 1fr; }
  .demo-controls .btn { width: 100%; justify-content: center; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .foot-bottom { flex-direction: column; gap: .4rem; }
}
@media (max-width: 520px) {
  .foot-grid { grid-template-columns: 1fr; }
  .nav-actions .btn-sm { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}