:root {
  --paper: #fafaf7;
  --paper-2: #f2f1eb;
  --card: #ffffff;
  --ink: #0d0e13;
  --ink-2: #33363d;
  --muted: #6b6f78;
  --line: #e5e3db;
  --line-2: #d6d4cb;

  --night: #09090e;
  --night-2: #12121a;
  --night-3: #1b1b26;
  --night-line: rgba(255, 255, 255, 0.09);
  --night-text: #e9e9f0;
  --night-muted: #9a9cab;

  --violet: #7b3fe4;
  --sky: #4aa3f0;
  --grad: linear-gradient(95deg, #8b5cf6 0%, #6d6af0 45%, #4aa3f0 100%);
  --violet-soft: #f1ebfd;
  --good: #16a34a;
  --bad: #dc2626;

  --radius: 18px;
  --radius-sm: 11px;
  --max: 1180px;
  --nav-h: 64px;

  --serif: "Instrument Serif", "Iowan Old Style", Georgia, serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 12px); }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: var(--sans); font-size: 16.5px; line-height: 1.65;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
img, video { display: block; max-width: 100%; }
a { color: inherit; }
p a { color: var(--violet); text-underline-offset: 3px; }
.container { max-width: var(--max); margin: 0 auto; padding: 0 28px; }
.skip-link { position: absolute; left: -999px; top: 8px; background: #fff; color: var(--ink); padding: 8px 14px; border-radius: 8px; z-index: 200; }
.skip-link:focus { left: 12px; }
.grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ------------------------------------------------------------------ nav */

.nav {
  position: fixed; inset: 0 0 auto 0; height: var(--nav-h); z-index: 100;
  color: var(--night-text); transition: background .25s, color .25s, border-color .25s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(250, 250, 247, 0.86); color: var(--ink);
  backdrop-filter: saturate(170%) blur(14px); -webkit-backdrop-filter: saturate(170%) blur(14px);
  border-bottom-color: var(--line);
}
.nav .container { height: 100%; display: flex; align-items: center; gap: 26px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 650; font-size: 18px; letter-spacing: -0.01em; }
.brand img { width: 30px; height: 30px; }
.nav-links { display: flex; gap: 2px; margin-left: 6px; }
.nav-links a { text-decoration: none; font-size: 14.5px; opacity: .78; padding: 6px 11px; border-radius: 8px; transition: opacity .15s, background .15s; }
.nav-links a:hover { opacity: 1; background: rgba(127, 127, 127, .12); }
.nav-links a.active { opacity: 1; }
.nav-links a.active::after { content: ""; display: block; height: 2px; margin-top: 2px; border-radius: 2px; background: var(--grad); }
.nav-actions { margin-left: auto; display: flex; gap: 8px; }
.nav-toggle { display: none; margin-left: auto; font: inherit; font-size: 14px; color: inherit; background: none; border: 1px solid currentColor; border-radius: 9px; padding: 5px 11px; opacity: .8; cursor: pointer; }

/* -------------------------------------------------------------- buttons */

.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 9px 16px; border-radius: 999px;
  font-size: 14.5px; font-weight: 550; text-decoration: none; cursor: pointer;
  border: 1px solid var(--line-2); background: var(--card); color: var(--ink);
  transition: transform .14s, box-shadow .2s, background .2s, border-color .2s;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(13, 14, 19, .10); }
.btn svg { width: 16px; height: 16px; flex: none; }
.btn-lg { padding: 12px 22px; font-size: 15.5px; }
.btn-glow { background: #fff; color: var(--ink); border-color: #fff; }
.btn-ghost { background: rgba(255, 255, 255, .06); color: var(--night-text); border-color: rgba(255, 255, 255, .18); }
.btn-ghost:hover { background: rgba(255, 255, 255, .12); box-shadow: none; }
.nav:not(.scrolled) .btn { background: rgba(255, 255, 255, .06); color: var(--night-text); border-color: rgba(255, 255, 255, .18); }

/* ----------------------------------------------------------------- hero */

.hero {
  position: relative; overflow: hidden; background: var(--night); color: var(--night-text);
  padding: calc(var(--nav-h) + 56px) 0 0;
}
.hero::before, .hero::after {
  content: ""; position: absolute; pointer-events: none; border-radius: 50%; filter: blur(90px); opacity: .55;
}
.hero::before { width: 620px; height: 620px; left: -180px; top: -220px; background: radial-gradient(circle, #6d3fe0 0%, transparent 65%); }
.hero::after { width: 700px; height: 700px; right: -220px; top: 120px; background: radial-gradient(circle, #2f7fd6 0%, transparent 65%); opacity: .38; }
.hero-grid-bg {
  position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background-image: linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 56px 56px; mask-image: radial-gradient(ellipse at 50% 30%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, #000 20%, transparent 75%);
}
.hero .container { position: relative; z-index: 1; }
.hero-main { display: grid; grid-template-columns: 1.02fr 1fr; gap: 56px; align-items: center; }

.badge {
  display: inline-flex; align-items: center; gap: 10px; padding: 5px 14px 5px 6px; border-radius: 999px;
  font-size: 13.5px; color: var(--night-text); text-decoration: none;
  background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .14);
}
.badge b { font-weight: 600; padding: 2px 10px; border-radius: 999px; background: var(--grad); color: #fff; white-space: nowrap; }

.hero h1 { margin: 22px 0 18px; font-weight: 400; }
.wordmark {
  display: block; font-family: var(--serif); font-size: clamp(68px, 9vw, 118px); line-height: .95; letter-spacing: -0.02em;
}
.wordmark i { font-style: italic; }
.subtitle {
  display: block; margin-top: 14px; font-family: var(--sans); font-weight: 600;
  font-size: clamp(20px, 2.2vw, 27px); line-height: 1.28; letter-spacing: -0.015em; color: #fff; max-width: 560px;
}
.hero-lead { font-size: 17.5px; color: var(--night-muted); max-width: 540px; margin: 0 0 22px; line-height: 1.62; }
.hero-lead b { color: var(--night-text); font-weight: 550; }
.authors { margin: 0; font-size: 15px; color: var(--night-text); }
.affil { margin: 2px 0 24px; font-size: 13.5px; color: var(--night-muted); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 64px; border-top: 1px solid var(--night-line); }
.stat { padding: 26px 22px 34px 0; }
.stat + .stat { padding-left: 22px; border-left: 1px solid var(--night-line); }
.stat .num { font-family: var(--serif); font-size: clamp(38px, 4vw, 52px); line-height: 1; letter-spacing: -0.01em; white-space: nowrap; }
.stat .num small { font-family: var(--sans); font-size: 14px; font-weight: 500; color: var(--night-muted); margin-left: 6px; letter-spacing: 0; }
.stat:first-child .num { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat p { margin: 10px 0 0; font-size: 13.5px; color: var(--night-muted); line-height: 1.5; }

/* --------------------------------------------------------------- player */

.player {
  background: var(--night-2); border: 1px solid var(--night-line); border-radius: 22px; padding: 12px;
  box-shadow: 0 40px 80px -30px rgba(0, 0, 0, .7), 0 0 0 1px rgba(255,255,255,.02) inset;
}
.player.light { background: var(--card); border-color: var(--line); box-shadow: 0 24px 60px -34px rgba(13, 14, 19, .28); }
.player-head { display: flex; align-items: center; gap: 10px; padding: 4px 6px 10px; font-size: 13px; color: var(--night-muted); }
.player.light .player-head { color: var(--muted); }
.player-head .title { color: var(--night-text); font-weight: 600; font-size: 14px; }
.player.light .player-head .title { color: var(--ink); }
.player-head .hint { margin-left: auto; display: inline-flex; align-items: center; gap: 6px; }
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--grad); box-shadow: 0 0 0 4px rgba(123, 63, 228, .18); }

.compare { position: relative; border-radius: 13px; overflow: hidden; background: #000; touch-action: pan-y; cursor: ew-resize; user-select: none; --pos: 50%; }
.compare video { width: 100%; height: 100%; object-fit: cover; }
.compare .cmp-top { position: absolute; inset: 0; clip-path: inset(0 0 0 var(--pos)); }
.cmp-handle { position: absolute; top: 0; bottom: 0; left: var(--pos); width: 2px; margin-left: -1px; background: #fff; box-shadow: 0 0 12px rgba(0,0,0,.35); pointer-events: none; }
.cmp-handle::after {
  content: ""; position: absolute; top: 50%; left: 50%; width: 34px; height: 34px; transform: translate(-50%, -50%);
  border-radius: 50%; background: #fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230d0e13' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M9 6l-6 6 6 6M15 6l6 6-6 6'/%3E%3C/svg%3E") center / 18px no-repeat;
  box-shadow: 0 4px 14px rgba(0, 0, 0, .35);
}
.cmp-label {
  position: absolute; top: 10px; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; letter-spacing: .01em;
  background: rgba(10, 10, 14, .62); color: #fff; backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); pointer-events: none;
}
.cmp-label.left { left: 10px; }
.cmp-label.right { right: 10px; background: rgba(123, 63, 228, .85); }
.cmp-range { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; cursor: ew-resize; margin: 0; }

.strip { margin-top: 10px; border-radius: 11px; overflow: hidden; background: #f4f4f6; }
.strip video { width: 100%; aspect-ratio: 900 / 338; object-fit: cover; }
.player:not(.light) .strip { background: #0b0b09; }
.player:not(.light) .strip video { filter: invert(1) hue-rotate(180deg) saturate(1.3); }

.player-foot { display: flex; align-items: center; gap: 12px; padding: 12px 6px 4px; font-size: 13px; color: var(--night-muted); }
.player.light .player-foot { color: var(--muted); }
.icon-btn {
  display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; cursor: pointer;
  background: rgba(255,255,255,.08); color: var(--night-text); border: 1px solid var(--night-line);
}
.player.light .icon-btn { background: var(--paper-2); color: var(--ink); border-color: var(--line); }
.icon-btn svg { width: 14px; height: 14px; }
.progress { flex: 1; height: 3px; border-radius: 3px; background: rgba(255,255,255,.12); overflow: hidden; }
.player.light .progress { background: var(--paper-2); }
.progress i { display: block; height: 100%; width: 0; background: var(--grad); }

/* ------------------------------------------------------------- sections */

section { padding: 112px 0 0; }
.sec-head { max-width: 860px; margin-bottom: 38px; }
.sec-kicker { display: flex; align-items: center; gap: 12px; font-size: 13px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.sec-kicker .num { font-family: var(--mono); font-weight: 500; color: var(--violet); letter-spacing: 0; }
.sec-kicker::after { content: ""; flex: 0 0 48px; height: 1px; background: var(--line-2); }
h2.display { font-family: var(--serif); font-weight: 400; font-size: clamp(38px, 4.6vw, 58px); line-height: 1.04; letter-spacing: -0.015em; margin: 14px 0 16px; }
h2.display i { font-style: italic; }
.sec-lead { font-size: 18px; color: var(--ink-2); margin: 0; line-height: 1.6; }
h3.sub { font-size: 22px; font-weight: 650; letter-spacing: -0.015em; margin: 72px 0 8px; }
.sub-lead { color: var(--ink-2); max-width: 820px; margin: 0 0 22px; }

.night { background: var(--night); color: var(--night-text); padding: 104px 0 112px; margin-top: 112px; position: relative; overflow: hidden; }
.night::before { content: ""; position: absolute; width: 760px; height: 760px; right: -260px; top: -300px; border-radius: 50%; background: radial-gradient(circle, rgba(109,63,224,.45), transparent 65%); filter: blur(60px); pointer-events: none; }
.night .container { position: relative; }
.night .sec-kicker { color: var(--night-muted); }
.night .sec-kicker::after { background: var(--night-line); }
.night .sec-lead { color: var(--night-muted); }

/* ---------------------------------------------------------------- chips */

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.chip {
  display: inline-flex; align-items: center; gap: 8px; font: inherit; font-size: 14px; font-weight: 500; cursor: pointer;
  padding: 7px 14px; border-radius: 999px; border: 1px solid var(--line-2); background: var(--card); color: var(--ink-2);
  transition: background .15s, color .15s, border-color .15s;
}
.chip:hover { border-color: var(--ink-2); }
.chip[aria-pressed="true"] { background: var(--ink); color: #fff; border-color: var(--ink); }
.chip .sw { width: 8px; height: 8px; border-radius: 50%; }
.sw.game { background: #f59e0b; }
.sw.robot { background: #10b981; }

/* ---------------------------------------------------------------- demo */

.demo { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 22px; align-items: start; }
.info { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.info-panel[hidden] { display: none; }
.info h4 { font-family: var(--serif); font-weight: 400; font-size: 32px; margin: 0 0 4px; line-height: 1.1; }
.info .src-type { font-size: 13px; color: var(--muted); margin-bottom: 18px; }
.kv { display: grid; grid-template-columns: 112px 1fr; gap: 10px 14px; font-size: 14.5px; margin: 0; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; color: var(--ink); }
.ctrls { display: flex; flex-wrap: wrap; gap: 6px; }
.ctrls span { font-family: var(--mono); font-size: 12px; padding: 3px 8px; border-radius: 7px; background: var(--paper-2); border: 1px solid var(--line); color: var(--ink-2); }
.info .note { margin: 18px 0 0; padding-top: 16px; border-top: 1px solid var(--line); font-size: 14px; color: var(--muted); }

.three { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.tcard { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px; }
.tcard video { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border-radius: 10px; background: #111; }
.tcard video + video { margin-top: 8px; }
.tcard h4 { margin: 12px 4px 2px; font-size: 15.5px; font-weight: 600; }
.tcard p { margin: 0 4px 4px; font-size: 13.5px; color: var(--muted); }

.gallery { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 10px; }
.gallery figure { margin: 0; position: relative; border-radius: 12px; overflow: hidden; background: #111; aspect-ratio: 6 / 5; }
.gallery video { width: 100%; height: 100%; object-fit: cover; }
.gallery figcaption { position: absolute; left: 0; right: 0; bottom: 0; padding: 22px 10px 8px; font-size: 12px; font-weight: 600; color: #fff; background: linear-gradient(transparent, rgba(0,0,0,.65)); }

/* ----------------------------------------------------------- challenges */

.duo { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.dcard { background: var(--night-2); border: 1px solid var(--night-line); border-radius: 22px; padding: 26px; }
.dcard .tag { font-family: var(--mono); font-size: 12px; color: #b9a2f5; letter-spacing: .02em; }
.dcard h4 { font-family: var(--serif); font-weight: 400; font-size: 34px; line-height: 1.08; margin: 8px 0 10px; }
.dcard p { color: var(--night-muted); font-size: 15px; margin: 0; }
.dcard p b { color: var(--night-text); font-weight: 550; }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 20px; }
.pair figure { margin: 0; }
.pair video { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 12px; background: #fff; }
.pair figcaption { margin-top: 8px; font-size: 13px; font-weight: 600; text-align: center; }
.pair .bad { color: #f87171; }
.pair .good { color: #4ade80; }

/* --------------------------------------------------------------- method */

.fig { margin: 0; }
.fig-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.fig-card img { width: 100%; height: auto; }
.fig figcaption { font-size: 14px; color: var(--muted); margin: 12px 4px 0; line-height: 1.55; }
.fig figcaption b { color: var(--ink-2); }

.modules { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 22px; }
.module { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; display: flex; flex-direction: column; }
.module .q { display: inline-flex; align-self: flex-start; gap: 6px; align-items: center; font-size: 12.5px; font-weight: 600; padding: 3px 10px; border-radius: 999px; background: var(--violet-soft); color: var(--violet); }
.module h4 { font-size: 19px; font-weight: 650; letter-spacing: -0.01em; margin: 14px 0 8px; }
.module p { font-size: 15px; color: var(--ink-2); margin: 0 0 10px; }
.module .eq { margin-top: auto; font-family: var(--mono); font-size: 13px; line-height: 1.7; padding: 12px 14px; border-radius: 10px; background: var(--paper); border: 1px solid var(--line); overflow-x: auto; white-space: nowrap; }

.schema-wrap { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; overflow-x: auto; }
.schema { display: grid; grid-template-columns: 138px repeat(12, minmax(46px, 1fr)); gap: 5px; min-width: 780px; }
.schema .hd { font-family: var(--mono); font-size: 11.5px; color: var(--muted); text-align: center; padding-bottom: 4px; }
.schema .hd.hl { color: var(--violet); font-weight: 600; }
.schema .src-name { font-size: 13.5px; font-weight: 600; display: flex; align-items: center; gap: 8px; }
.cell { height: 40px; border-radius: 8px; display: grid; place-items: center; font-family: var(--mono); font-size: 11.5px; font-weight: 500; }
.cell.atk { background: #fde2e1; color: #b42318; }
.cell.mov { background: #dde9fe; color: #1d4ed8; }
.cell.drv { background: #fdf0c8; color: #a15c07; }
.cell.bmb { background: #ffe4cc; color: #c2410c; }
.cell.jnt { background: #dcf5e4; color: #15803d; }
.cell.grp { background: #cff4ee; color: #0f766e; }
.cell.pad { background: repeating-linear-gradient(135deg, #f5f4ef 0 5px, #edece6 5px 10px); color: #b4b3ad; }
.cell.hl { box-shadow: 0 0 0 2px var(--violet); }
.schema-legend { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 16px; font-size: 13px; color: var(--muted); }
.schema-legend span { display: inline-flex; align-items: center; gap: 7px; }
.schema-legend i { width: 14px; height: 14px; border-radius: 4px; }

.stages { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 22px; }
.stage { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; display: flex; flex-direction: column; }
.stage.hl { background: var(--ink); color: #fff; border-color: var(--ink); }
.stage .st { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.stage.hl .st { color: #b9a2f5; }
.stage h4 { font-size: 18px; font-weight: 650; margin: 6px 0 10px; letter-spacing: -0.01em; }
.stage ul { margin: 0 0 18px; padding-left: 18px; font-size: 14.5px; color: var(--ink-2); }
.stage.hl ul { color: #c9cad3; }
.stage li { margin: 3px 0; }
.fpsbar { margin-top: auto; }
.fpsbar .val { font-family: var(--serif); font-size: 40px; line-height: 1; }
.fpsbar .val small { font-family: var(--sans); font-size: 13px; color: var(--muted); margin-left: 4px; }
.stage.hl .fpsbar .val small { color: #9a9cab; }
.fpsbar .track { height: 6px; border-radius: 6px; background: var(--paper-2); margin-top: 10px; overflow: hidden; }
.stage.hl .fpsbar .track { background: rgba(255,255,255,.12); }
.fpsbar .track i { display: block; height: 100%; width: calc(var(--v) * 100%); border-radius: 6px; background: var(--ink-2); }
.stage.hl .fpsbar .track i { background: var(--grad); }

/* -------------------------------------------------------------- results */

.charts { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 18px; }
.chart { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px; }
.chart h4 { margin: 0; font-size: 15.5px; font-weight: 650; }
.chart .ch-sub { font-size: 13px; color: var(--muted); margin: 2px 0 16px; }
.chart-stack { display: grid; gap: 18px; }
.legend { display: flex; gap: 16px; font-size: 12.5px; color: var(--muted); margin: -6px 0 14px; }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend i { width: 10px; height: 10px; border-radius: 3px; }
.brow { display: grid; grid-template-columns: 136px 1fr; gap: 12px; align-items: center; margin: 7px 0; font-size: 13.5px; }
.brow .name { color: var(--ink-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.brow.ours .name { color: var(--violet); font-weight: 650; }
.bars { display: grid; gap: 4px; }
.bar { position: relative; height: 16px; border-radius: 5px; background: var(--paper-2); margin-right: 46px; }
.bar i { position: absolute; inset: 0 auto 0 0; width: calc(var(--v) * 100%); border-radius: 5px; background: #c7c9d1; transition: width 1s cubic-bezier(.2,.8,.2,1); }
.bar.b2 i { background: #9fa3b0; }
.bar span { position: absolute; top: 50%; transform: translateY(-50%); left: calc(var(--v) * 100% + 6px); font-family: var(--mono); font-size: 11.5px; color: var(--muted); white-space: nowrap; }
.brow.ours .bar i { background: var(--grad); }
.brow.ours .bar.b2 i { background: linear-gradient(95deg, #5b3fd0, #2f7fd6); }
.brow.ours .bar span { color: var(--ink); font-weight: 600; }
.charts:not(.in) .bar i { width: 0; }
.lg1 { background: #c7c9d1; }
.lg2 { background: #9fa3b0; }

details.table-details { margin-top: 18px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }
details.table-details summary { cursor: pointer; padding: 16px 22px; font-weight: 600; font-size: 15px; list-style: none; display: flex; align-items: center; gap: 10px; }
details.table-details summary::-webkit-details-marker { display: none; }
details.table-details summary::before { content: "+"; font-family: var(--mono); color: var(--violet); width: 14px; }
details.table-details[open] summary::before { content: "−"; }
.table-wrap { overflow-x: auto; }
details .table-wrap { border-top: 1px solid var(--line); }
table.data { border-collapse: collapse; width: 100%; font-size: 14px; font-variant-numeric: tabular-nums; }
table.data th, table.data td { padding: 10px 14px; text-align: center; white-space: nowrap; }
table.data th:first-child, table.data td:first-child { text-align: left; }
table.data thead th { font-weight: 600; color: var(--muted); font-size: 13px; border-bottom: 1px solid var(--line); }
table.data thead tr.grp th { font-style: italic; font-weight: 500; border-bottom: none; padding-bottom: 0; }
table.data tbody tr + tr td { border-top: 1px solid #f0efe9; }
table.data tr.dom td { background: var(--paper); font-weight: 600; font-size: 12.5px; letter-spacing: .05em; text-transform: uppercase; color: var(--muted); }
table.data tr.ours td { background: var(--violet-soft); font-weight: 650; }
table.data tr.ours td:first-child { color: var(--violet); }
td.best { font-weight: 700; }
.note-sm { font-size: 13px; color: var(--muted); margin: 10px 4px 0; }

.tabs { display: inline-flex; gap: 4px; padding: 4px; border-radius: 999px; background: var(--paper-2); border: 1px solid var(--line); margin-bottom: 18px; flex-wrap: wrap; }
.tab { font: inherit; font-size: 14px; border: none; background: none; padding: 6px 16px; border-radius: 999px; cursor: pointer; color: var(--ink-2); }
.tab[aria-selected="true"] { background: var(--card); color: var(--ink); font-weight: 600; box-shadow: 0 1px 4px rgba(13,14,19,.12); }
.tab-panel[hidden] { display: none; }

.vcard { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; }
.vgrid { display: grid; gap: 10px; }
.vgrid.c3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.vgrid.c4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.vgrid.c2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.vcell { margin: 0; }
.vcell video { width: 100%; border-radius: 9px; background: #111; }
.vcell figcaption { font-size: 13px; color: var(--muted); text-align: center; margin-top: 7px; }
.vcell.gt figcaption { color: var(--ink); font-weight: 600; }
.vcell.ours video { box-shadow: 0 0 0 2.5px var(--violet); }
.vcell.ours figcaption { color: var(--violet); font-weight: 650; }
.vfoot { display: flex; align-items: center; gap: 10px; margin-top: 12px; font-size: 13px; color: var(--muted); }
.vfoot button { font: inherit; font-size: 13px; padding: 4px 12px; border-radius: 999px; border: 1px solid var(--line-2); background: var(--card); cursor: pointer; color: var(--ink); }

.abl { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.9fr); gap: 18px; align-items: start; }
.mini { display: grid; gap: 14px; }
.mini .mrow { display: grid; grid-template-columns: 96px 1fr; gap: 10px; align-items: center; font-size: 13px; }
.mini .metric { font-weight: 600; font-size: 13px; margin: 6px 0 -4px; }
.mini .metric small { color: var(--muted); font-weight: 500; }

.long { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }

/* -------------------------------------------------------------- dataset */

.sources { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.src { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.src video { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; background: #111; }
.src-body { padding: 14px 16px 16px; }
.src-body h4 { margin: 0; font-size: 16px; font-weight: 650; display: flex; align-items: center; gap: 8px; }
.src-body .row { display: flex; flex-wrap: wrap; gap: 6px 16px; margin-top: 8px; font-size: 13.5px; color: var(--muted); }
.src-body .row b { color: var(--ink); font-weight: 600; font-family: var(--mono); font-size: 13px; }
.totals { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin: 22px 0 0; background: var(--ink); color: #fff; border-radius: var(--radius); overflow: hidden; }
.totals div { padding: 20px 22px; }
.totals div + div { border-left: 1px solid rgba(255,255,255,.12); }
.totals .v { font-family: var(--serif); font-size: 38px; line-height: 1; }
.totals .k { font-size: 13px; color: #a8aab6; margin-top: 6px; }

/* ------------------------------------------------------- limits & cite */

.limits { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; list-style: none; padding: 0; margin: 0; }
.limits li { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; font-size: 14.5px; color: var(--ink-2); }
.limits li b { display: block; color: var(--ink); font-size: 15px; margin-bottom: 4px; }

.bib { position: relative; background: var(--night); color: #d9dae3; border-radius: var(--radius); padding: 24px 26px; overflow-x: auto; }
.bib pre { margin: 0; font-family: var(--mono); font-size: 13.5px; line-height: 1.7; }
.bib .k { color: #b9a2f5; }
.bib .s { color: #8fd3a8; }
.copy-btn { position: absolute; top: 14px; right: 14px; font: inherit; font-size: 13px; padding: 5px 13px; border-radius: 999px; cursor: pointer; background: rgba(255,255,255,.08); color: #fff; border: 1px solid rgba(255,255,255,.18); }

footer { margin-top: 120px; background: var(--night); color: var(--night-muted); padding: 40px 0 48px; font-size: 14px; }
footer .container { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 14px; }
footer .brand { color: var(--night-text); }

/* ----------------------------------------------------------- reveal */

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.8,.2,1); }
.reveal.in { opacity: 1; transform: none; }

/* ------------------------------------------------------------ responsive */

@media (max-width: 1040px) {
  .hero-main { grid-template-columns: 1fr; gap: 40px; }
  .subtitle, .hero-lead { max-width: 720px; }
  .demo, .charts, .abl { grid-template-columns: 1fr; }
  .modules, .stages { grid-template-columns: 1fr; }
  .limits { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sources { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 860px) {
  .nav-links, .nav-actions { display: none; }
  .nav-toggle { display: block; }
  .nav.open { background: var(--paper); color: var(--ink); }
  .nav.open .nav-links { display: flex; flex-direction: column; position: absolute; top: var(--nav-h); left: 0; right: 0; background: var(--paper); border-bottom: 1px solid var(--line); padding: 8px 18px 16px; margin: 0; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3) { padding-left: 0; border-left: none; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid var(--night-line); }
  .three, .duo, .long { grid-template-columns: 1fr; }
  .vgrid.c4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .gallery { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .totals { grid-template-columns: repeat(2, 1fr); }
  .totals div:nth-child(3) { border-left: none; }
  .totals div:nth-child(-n+2) { border-bottom: 1px solid rgba(255,255,255,.12); }
}
@media (max-width: 560px) {
  .container { padding: 0 18px; }
  section { padding-top: 84px; }
  .stats { grid-template-columns: 1fr; }
  .stat, .stat + .stat { padding-left: 0; border-left: none; border-bottom: 1px solid var(--night-line); }
  .vgrid.c3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sources, .limits { grid-template-columns: 1fr; }
  .brow { grid-template-columns: 104px 1fr; }
  .kv { grid-template-columns: 96px 1fr; }
  .fig-card { padding: 10px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .bar i { transition: none; }
}

.chart.grouped { display: flex; flex-direction: column; }
.chart.grouped .rows { flex: 1; display: flex; flex-direction: column; justify-content: space-evenly; }

.long { align-items: start; }