/* Dark "flow field" theme. One color rule for the whole page: mint = GPL (ours), gray = every
   baseline, red = failure, blue / amber = the robot's two manners, pick / push (the same colors are
   burned into the adaptation demo video). Grounds: near-black hero (the flow glows best there) fading
   into slate content, which reads easier next to bright robot footage than near-black does. */
:root {
  --bg-deep: #0d1117;
  --bg: #1b2129;
  --bg-2: #232a35;
  --bg-3: #2c3542;
  --ink: #e6eaee;
  --ink-2: #bcc4cd;
  --ink-3: #939dab;
  --line: rgba(255, 255, 255, 0.09);
  --gpl: #3ddc97;
  --gpl-2: #7cf0c4;
  --gpl-soft: rgba(61, 220, 151, 0.12);
  --gpl-dim: rgba(61, 220, 151, 0.38);
  --base: #9aa3ad;
  --base-2: #626b77;
  --pick: #5b9dff;
  --push: #ffb547;
  --bad: #ff6b57;
  --cube: #6f97ff;
  --paper: #f5f6f3;
  --display: "Bricolage Grotesque", "Inter", system-ui, sans-serif;
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  --text: 720px;
  --wide: 1160px;
  --r: 16px;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 64px; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.68 var(--sans); -webkit-font-smoothing: antialiased; }
body::before {          /* film grain */
  content: ""; position: fixed; inset: 0; z-index: 100; pointer-events: none; opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
a { color: var(--gpl); text-decoration: none; }
a:hover { text-decoration: underline; }
img, video, canvas { display: block; max-width: 100%; }
h1, h2, h3, h4 { margin: 0; line-height: 1.1; font-family: var(--display); }
h2 { font-size: clamp(32px, 4.6vw, 54px); font-weight: 700; letter-spacing: -0.03em; margin-bottom: 20px; }
h3 { font-size: 26px; font-weight: 650; letter-spacing: -0.02em; margin: 48px 0 14px; }
h4 { font-size: 18px; font-weight: 650; letter-spacing: -0.01em; }
p { margin: 0 0 14px; }
b, strong { font-weight: 600; color: var(--ink); }
em { color: var(--gpl-2); font-style: italic; }
.wrap { width: min(var(--wide), 100% - 32px); margin-inline: auto; }
.prose { max-width: var(--text); }
.muted { color: var(--ink-2); }
.note { font-size: 13.5px; color: var(--ink-3); line-height: 1.55; }
.grad { background: linear-gradient(100deg, var(--gpl) 10%, var(--gpl-2) 45%, var(--pick) 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ---------------------------------------------------------------- top bar */
.topbar { position: sticky; top: 0; z-index: 50; background: rgba(13, 17, 23, 0.78); backdrop-filter: blur(14px) saturate(1.4); border-bottom: 1px solid var(--line); }
.topbar .wrap { display: flex; align-items: center; gap: 22px; height: 56px; }
.brand { display: flex; align-items: center; gap: 10px; font: 700 17px var(--display); color: var(--ink); letter-spacing: -0.01em; white-space: nowrap; }
.brand:hover { text-decoration: none; }
.brand i { width: 22px; height: 12px; position: relative; }
.brand i::before, .brand i::after { content: ""; position: absolute; top: 2px; width: 8px; height: 8px; border-radius: 50%; background: var(--gpl); box-shadow: 0 0 10px var(--gpl); }
.brand i::after { left: 12px; opacity: 0.55; }
.topbar nav { display: flex; gap: 22px; margin-left: auto; }
.topbar nav a { color: var(--ink-3); font-size: 14px; font-weight: 500; white-space: nowrap; }
.topbar nav a:hover { color: var(--ink); text-decoration: none; }

/* ---------------------------------------------------------------- hero: noise flows into two plans */
.hero { position: relative; min-height: min(92vh, 880px); display: flex; align-items: center; overflow: hidden;
  background: radial-gradient(ellipse 60% 70% at 78% 50%, rgba(61, 220, 151, 0.10), transparent 70%),
    linear-gradient(180deg, var(--bg-deep) 72%, var(--bg)); }
#hero-flow { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-text { position: relative; z-index: 2; width: min(var(--wide), 100% - 32px); margin: 0 auto; padding: 72px 0; }
.hero-text > * { max-width: 640px; }
.hero-text { text-shadow: 0 0 22px rgba(13, 17, 23, 0.95), 0 0 6px rgba(13, 17, 23, 0.9); }
.hero-text .grad, .hero-text .btn, .venue { text-shadow: none; }
.venue { display: inline-flex; align-items: center; gap: 8px; font: 500 12px var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--gpl);
  padding: 6px 12px; border-radius: 99px; background: var(--gpl-soft); border: 1px solid rgba(61, 220, 151, 0.25); margin-bottom: 26px; }
.venue::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--gpl); box-shadow: 0 0 8px var(--gpl); }
.hero h1 { font-size: clamp(48px, 7.6vw, 104px); font-weight: 800; letter-spacing: -0.045em; line-height: 0.95; }
.tagline { font: 650 clamp(24px, 2.7vw, 34px)/1.15 var(--display); letter-spacing: -0.025em; color: var(--ink); margin: 26px 0 0; }
.subtitle { font-size: clamp(16px, 1.6vw, 19px); color: var(--ink-3); margin: 12px 0 24px; line-height: 1.45; }
.authors { font-size: 16.5px; color: var(--ink); margin-bottom: 2px; }
.authors a { color: var(--ink); }
.affil { font-size: 14px; color: var(--ink-3); }
.authors, .affil { text-wrap: balance; }
.authors span, .affil span { white-space: nowrap; margin-right: 10px; }
.authors sup, .affil sup { font-size: 0.68em; margin-left: 1px; }
.links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 11px 18px; border-radius: 12px; border: 1px solid var(--line);
  background: var(--bg-3); color: var(--ink); font: 600 14.5px var(--sans); cursor: pointer; transition: transform 0.15s, border-color 0.15s; }
.btn:hover { text-decoration: none; border-color: rgba(255, 255, 255, 0.28); transform: translateY(-1px); }
.btn.primary { background: var(--gpl); border-color: var(--gpl); color: #04150e; }
.btn svg { width: 17px; height: 17px; }
.modes { position: absolute; z-index: 2; top: 0; bottom: 0; right: max(16px, (100% - var(--wide)) / 2); width: min(410px, 31vw);
  display: flex; flex-direction: column; justify-content: center; gap: clamp(22px, 5vh, 48px); pointer-events: none; }
.modes-cap { margin: -6px 0 0; font: 500 13px var(--mono); color: var(--ink-2); text-align: center; letter-spacing: 0.04em; }
.mode { margin: 0; position: relative; border-radius: 16px; overflow: hidden; pointer-events: auto;
  box-shadow: 0 0 0 1px rgba(61, 220, 151, 0.45), 0 0 46px rgba(61, 220, 151, 0.18); }
.mode video { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.mode figcaption { position: absolute; left: 10px; bottom: 10px; font: 600 12.5px var(--mono); color: #04150e; background: var(--gpl); padding: 3px 10px; border-radius: 99px; }
.mode figcaption.pick { background: var(--pick); color: #031024; }
.mode figcaption.push { background: var(--push); color: #1d1200; }

/* ---------------------------------------------------------------- sections */
section { position: relative; padding: 88px 0; }
section + section { border-top: 1px solid var(--line); }
section.alt { background: var(--bg-2); }
.eyebrow { display: flex; align-items: baseline; gap: 14px; margin-bottom: 14px; font: 500 12.5px var(--mono); letter-spacing: 0.16em; text-transform: uppercase; color: var(--gpl); }
.eyebrow b { font: 800 44px/0.8 var(--display); letter-spacing: 0; color: transparent; -webkit-text-stroke: 1px var(--gpl); }
.lead { font-size: 19.5px; color: var(--ink-2); max-width: var(--text); line-height: 1.6; }
.tldr { padding: 72px 0 80px; }
.claim { font: 600 clamp(24px, 3vw, 38px)/1.2 var(--display); letter-spacing: -0.03em; max-width: 940px; margin: 0 0 44px; }
.tiles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.tile { display: flex; flex-direction: column; background: var(--bg-2); border: 1px solid var(--line); border-radius: 20px; padding: 24px 24px 22px; color: var(--ink);
  transition: border-color 0.2s, transform 0.2s; }
a.tile:hover { text-decoration: none; border-color: rgba(61, 220, 151, 0.45); transform: translateY(-2px); }
.tile .k, .stat .k { font: 500 12px var(--mono); color: var(--gpl); letter-spacing: 0.16em; text-transform: uppercase; }
.tile h3 { font-size: 23px; margin: 10px 0 18px; }
.tile .num { font: 750 44px/1 var(--display); letter-spacing: -0.04em; color: var(--gpl); margin-top: auto; }
.tile .num s, .stat .num s { text-decoration: none; color: var(--ink-3); font-weight: 500; font-size: 0.7em; }
.tile p { font-size: 14.5px; color: var(--ink-2); margin: 12px 0 0; line-height: 1.5; }
.tiles.three .tile .num { margin-top: 0; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1px; margin-top: 34px; background: var(--line); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; }
.stats.one { margin-top: 0; }
.stat { background: var(--bg); padding: 24px 22px 20px; }
section.alt .stat { background: var(--bg-2); }
.stats.one .stat .num { font-size: 52px; margin-top: 12px; }
.stat .num { font: 750 38px/1 var(--display); letter-spacing: -0.035em; color: var(--gpl); font-variant-numeric: tabular-nums; }
.stat p { font-size: 14px; color: var(--ink-2); margin: 14px 0 0; line-height: 1.5; }

/* ---------------------------------------------------------------- media */
.media { position: relative; border-radius: 14px; overflow: hidden; background: var(--bg-2); border: 1px solid var(--line); }
.media video, .media img { width: 100%; height: auto; }
.chip { position: absolute; top: 10px; left: 10px; z-index: 1; font: 500 11.5px var(--mono); letter-spacing: 0.02em; padding: 3px 9px; border-radius: 99px;
  background: rgba(8, 10, 14, 0.78); color: #fff; border: 1px solid rgba(255, 255, 255, 0.14); backdrop-filter: blur(4px); }
.chip.r { left: auto; right: 10px; }
.chip.gpl { background: var(--gpl); color: #04150e; border-color: transparent; }
.chip.bad { background: var(--bad); color: #1d0703; border-color: transparent; }
.chip.pick { background: var(--pick); color: #031024; border-color: transparent; }
.chip.push { background: var(--push); color: #1d1200; border-color: transparent; }
.chip.base { background: var(--base); color: #0a0d12; border-color: transparent; }
.cap { font-size: 14.5px; color: var(--ink-2); margin-top: 12px; line-height: 1.55; }
.cap b { color: var(--ink); }
.grid2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.grid4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.split { display: grid; grid-template-columns: 1.1fr 1fr; gap: 44px; align-items: start; }
.split > *, .grid2 > *, .grid3 > *, .grid4 > *, .viewer > *, .playground > * { min-width: 0; }
figure { margin: 0; }
figure.fig { margin: 34px auto 0; }
.narrow { max-width: 820px; margin-inline: auto; }
figure.fig img { width: 100%; border-radius: 14px; background: var(--paper); padding: 14px; cursor: zoom-in; }
.plancv { width: 100%; aspect-ratio: 1; border-radius: 14px; background: #3a2a20; }
.ptitle { font: 650 17px var(--display); margin: 0 0 10px; display: flex; flex-wrap: wrap; gap: 4px 10px; align-items: baseline; }
.ptitle span { font: 400 14px var(--sans); color: var(--ink-3); }
.plan-ctl { margin-top: 14px; }
figcaption { font-size: 14.5px; color: var(--ink-2); margin-top: 12px; line-height: 1.55; }
dialog.lightbox { border: 0; padding: 0; background: transparent; max-width: 96vw; }
dialog.lightbox::backdrop { background: rgba(4, 6, 9, 0.9); }
dialog.lightbox img { max-height: 92vh; border-radius: 12px; background: var(--paper); padding: 16px; cursor: zoom-out; }

/* segmented buttons: clip switchers, tabs */
.seg { display: inline-flex; flex-wrap: wrap; gap: 3px; padding: 4px; background: var(--bg-3); border: 1px solid var(--line); border-radius: 13px; }
.seg button { font: 600 14px var(--sans); color: var(--ink-3); background: transparent; border: 0; border-radius: 9px; padding: 8px 14px; cursor: pointer; transition: color 0.15s, background 0.15s; }
.seg button:hover { color: var(--ink); }
.seg button[aria-pressed="true"], .seg button[aria-selected="true"] { background: var(--ink); color: var(--bg); }
.tabs { margin: 12px 0 34px; }
.tabs button { font-size: 15px; padding: 10px 20px; }
.ctl { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; margin: 0 0 14px; font: 500 12.5px var(--mono); color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.08em; }

/* ---------------------------------------------------------------- plan playground */
.trip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 40px; }
.flowcard { background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--r); padding: 14px 18px 20px; }
.flowcard canvas { width: 100%; height: 250px; }
.flowcard h4 { margin: 8px 0 6px; }
.flowcard p { font-size: 14px; color: var(--ink-2); margin: 0; line-height: 1.5; }
.tag { display: inline-block; font: 500 11.5px var(--mono); padding: 3px 9px; border-radius: 99px; margin-top: 12px; }
.tag.bad { color: var(--bad); background: rgba(255, 107, 87, 0.12); }
.tag.warn { color: var(--base); background: rgba(154, 163, 173, 0.14); }
.tag.good { color: var(--gpl); background: var(--gpl-soft); }
.playground { display: grid; grid-template-columns: 1.2fr 1fr; gap: 34px; margin-top: 30px; padding: 26px; background: var(--bg-2); border: 1px solid var(--line); border-radius: 20px; }
#pg-adapt { width: 100%; height: 300px; }
#pg-steer { width: 100%; height: 230px; }
.split .playground { grid-template-columns: 1fr; gap: 6px; margin-top: 0; padding: 18px 18px 10px; }
.split .playground .pg-side h4 { margin-top: 0; font-size: 18px; }
.pg-side h4 { font-size: 22px; margin: 18px 0 8px; }
.pg-side p { font-size: 15px; color: var(--ink-2); }
.readout { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 14px 0; }
.readout div { background: var(--bg); border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; font-size: 12.5px; color: var(--ink-3); line-height: 1.35; }
.readout b { display: block; font: 700 26px var(--display); color: var(--ink); font-variant-numeric: tabular-nums; margin-top: 4px; }
.slider { display: grid; grid-template-columns: auto 1fr auto; gap: 12px; align-items: center; font-size: 14px; color: var(--ink-2); margin: 12px 0; }
input[type=range] { width: 100%; accent-color: var(--gpl); }
.row { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.small-btn { font: 600 13.5px var(--sans); padding: 8px 14px; border-radius: 10px; border: 1px solid var(--line); background: var(--bg-3); color: var(--ink); cursor: pointer; }
.small-btn:hover { border-color: rgba(255, 255, 255, 0.3); }
.small-btn.go { background: var(--gpl); border-color: var(--gpl); color: #04150e; }
.log { display: flex; flex-wrap: wrap; gap: 4px; min-height: 24px; margin-top: 10px; }
.run { width: 20px; height: 20px; border-radius: 5px; display: grid; place-items: center; font-size: 12px; font-weight: 700; color: #06140e; }
.run.ok { background: var(--gpl); }
.run.no { background: var(--bad); }

/* ---------------------------------------------------------------- method */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 34px; }
.card { background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--r); padding: 22px; }
.card .k { font: 500 11.5px var(--mono); color: var(--gpl); letter-spacing: 0.14em; text-transform: uppercase; }
.card h4 { margin: 8px 0 8px; font-size: 21px; }
.card .eq { overflow-x: auto; overflow-y: hidden; margin: 8px 0 12px; font-size: 15px; color: var(--ink); }
.card p { font-size: 14.5px; color: var(--ink-2); margin: 0; }

/* ---------------------------------------------------------------- tables, charts, bars */
table { width: 100%; border-collapse: collapse; font-size: 15px; font-variant-numeric: tabular-nums; }
th, td { padding: 11px 12px; text-align: center; border-bottom: 1px solid var(--line); }
tr:last-child td { border-bottom: 0; }
th:first-child, td:first-child { text-align: left; }
th { font: 500 11.5px var(--mono); color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.06em; }
td { color: var(--ink-2); }
tr.ours td { background: var(--gpl-soft); color: var(--gpl); font-weight: 600; }
.tablewrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 14px; background: var(--bg-2); }
.chart { background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--r); padding: 18px 18px 16px; }
.chart svg { width: 100%; height: auto; overflow: visible; touch-action: pan-y; }
.chart .grid { stroke: var(--line); }
.chart .ref { stroke: var(--ink-3); stroke-dasharray: 4 4; }
.chart .cursor { stroke: rgba(255, 255, 255, 0.35); stroke-width: 1; }
.chart .tick { font: 12px var(--sans); fill: var(--ink-3); }
.chart .axis { font: 500 13px var(--sans); fill: var(--ink-2); }
.chart output { display: flex; flex-wrap: wrap; gap: 4px 18px; font-size: 14px; color: var(--ink-2); margin-top: 10px; min-height: 46px; }
.chart output span { display: inline-flex; align-items: center; gap: 6px; }
.chart output i { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }
.chart h4 { margin-bottom: 8px; }
.bars { display: grid; gap: 12px; margin: 18px 0 8px; }
.bar { display: grid; grid-template-columns: 200px 1fr 64px; align-items: center; gap: 14px; font-size: 14.5px; color: var(--ink-2); }
.bar .track { height: 12px; background: var(--bg-3); border-radius: 99px; overflow: hidden; }
.bar .fill { height: 100%; border-radius: 99px; transform-origin: left; transition: transform 1s cubic-bezier(.2, .7, .2, 1); }
.bar b { font-variant-numeric: tabular-nums; text-align: right; }
.js .reveal .bar .fill { transform: scaleX(0); }
.js .reveal.in .bar .fill { transform: none; }

/* robot section: synced viewer, run strip, reel */
.specs { display: flex; flex-wrap: wrap; gap: 8px; margin: 22px 0 0; }
.specs span { font: 500 12px var(--mono); color: var(--ink-2); padding: 5px 11px; border-radius: 99px; border: 1px solid var(--line); background: var(--bg-2); }
.viewer { display: grid; grid-template-columns: 1.7fr 1fr; gap: 18px; align-items: start; }
.panel { background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--r); padding: 18px 18px 14px; display: flex; flex-direction: column; }
.panel .now { font: 700 21px var(--display); letter-spacing: -0.02em; margin: 6px 0 6px; }
.panel p { font-size: 14px; color: var(--ink-2); }
.chapters { display: grid; gap: 1px; margin-top: 10px; }
.chapters button { display: grid; grid-template-columns: 42px 1fr; gap: 8px; text-align: left; font: 500 13.5px var(--sans); color: var(--ink-3);
  background: transparent; border: 0; border-radius: 8px; padding: 4px 8px; cursor: pointer; }
.chapters button span { font: 500 12px var(--mono); }
.chapters button:hover { background: var(--bg-3); color: var(--ink); }
.chapters button[aria-current="true"] { background: var(--gpl-soft); color: var(--ink); }
.chapters button[aria-current="true"] span { color: var(--gpl); }
.strip { display: grid; gap: 6px; margin-top: 16px; }
.strip .seq { display: grid; grid-template-columns: 92px repeat(8, 1fr); gap: 5px; align-items: center; font: 500 12px var(--mono); color: var(--ink-3); }
.strip .cell { height: 28px; border-radius: 6px; display: grid; place-items: center; font-size: 13px; font-weight: 700; color: #0a0d12; }
.cell.pick { background: var(--pick); }
.cell.push { background: var(--push); }
.cell.fail { opacity: 0.32; }
.cell.none { background: transparent; border: 1px dashed rgba(255, 255, 255, 0.2); color: var(--ink-3); }
.strip .head { font-size: 11px; text-align: center; }
.legend { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 13px; color: var(--ink-3); margin-top: 12px; }
.legend i { width: 11px; height: 11px; border-radius: 3px; display: inline-block; margin-right: 6px; vertical-align: -1px; }

/* adapt section: shift cards, compute bars, four-task bars, callout */
.shifts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.shifts > div { position: relative; background: var(--bg-2); border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px 16px; }
.shifts span { display: block; font-size: 14.5px; color: var(--ink-2); line-height: 1.4; padding-right: 54px; }
.shifts b { display: block; font: 650 18px/1.2 var(--display); color: var(--gpl); margin-top: 8px; }
.shifts i { position: absolute; top: 12px; right: 12px; font: 500 10.5px var(--mono); font-style: normal; color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.08em; }
.cost { display: grid; gap: 10px; margin-top: 18px; }
.crow { display: grid; grid-template-columns: 160px 1fr 44px; gap: 12px; align-items: center; font-size: 14.5px; color: var(--ink-2); }
.crow.head { font: 500 11px var(--mono); color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.08em; }
.crow.ours { color: var(--gpl); font-weight: 600; }
.crow .track { position: relative; height: 26px; border-radius: 7px; background: var(--bg-3); overflow: hidden; }
.crow .track i { position: absolute; inset: 0 auto 0 0; min-width: 3px; background: var(--base-2); transform-origin: left; transition: transform 1.2s cubic-bezier(.2, .7, .2, 1); }
.crow.ours .track i { background: var(--gpl); }
.crow .track em { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); font: 500 12px var(--mono); font-style: normal; color: var(--ink); }
.crow.ours .track em { color: var(--gpl); }
.crow > b { text-align: right; font-variant-numeric: tabular-nums; color: var(--ink); }
.crow > b.dim { color: var(--ink-3); }
.crow.head span:last-child { text-align: right; }
.js .reveal .crow .track i { transform: scaleX(0); }
.js .reveal.in .crow .track i { transform: none; }
.fams { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.fam { background: var(--bg-2); border: 1px solid var(--line); border-radius: 14px; padding: 16px 16px 12px; }
.fam > span { display: block; font-size: 13.5px; color: var(--ink-3); margin: 4px 0 12px; line-height: 1.4; }
.fam .bar { grid-template-columns: 48px 1fr 36px; gap: 8px; font-size: 13px; margin-top: 8px; }
.callout { margin-top: 40px; padding: 22px 24px; border-left: 3px solid var(--gpl); background: var(--gpl-soft); border-radius: 0 14px 14px 0; max-width: 880px; }
.callout b { font: 650 19px var(--display); }
.callout p { margin: 8px 0 0; color: var(--ink-2); }

/* collapsed provenance: the audit trail stays, out of the way */
details { margin-top: 18px; max-width: 900px; }
details summary { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; list-style: none; font: 500 12px var(--mono); color: var(--ink-3);
  text-transform: uppercase; letter-spacing: 0.12em; padding: 6px 12px; border: 1px solid var(--line); border-radius: 99px; }
details summary::-webkit-details-marker { display: none; }
details summary::before { content: "+"; font-size: 14px; color: var(--gpl); }
details[open] summary::before { content: "−"; }
details summary:hover { color: var(--ink); }
details > p, details > div { margin-top: 14px; }
details > p { font-size: 13.5px; color: var(--ink-3); line-height: 1.6; }

/* ---------------------------------------------------------------- bibtex, footer */
.bibbox { position: relative; }
pre { background: var(--bg-2); color: var(--ink-2); border: 1px solid var(--line); border-radius: var(--r); padding: 24px; overflow-x: auto; font: 13.5px/1.7 var(--mono); margin: 0; }
.bibbox .btn { position: absolute; top: 12px; right: 12px; padding: 6px 14px; font-size: 13px; }
footer { padding: 44px 0 64px; font-size: 13.5px; color: var(--ink-3); border-top: 1px solid var(--line); }

/* scroll reveal */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.8s ease, transform 0.8s cubic-bezier(.2, .7, .2, 1); }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .js .reveal .bar .fill, .js .reveal .crow .track i { transform: none; }
}

/* ---------------------------------------------------------------- small screens */
@media (max-width: 960px) {
  body { font-size: 16px; }
  section { padding: 76px 0; }
  .split, .playground, .cards, .trip, .grid3, .viewer, .tiles { grid-template-columns: 1fr; }
  .grid4, .shifts, .fams { grid-template-columns: repeat(2, 1fr); }
  .topbar nav { display: none; }
  .hero { flex-direction: column; align-items: stretch; min-height: 0; }
  .hero-text { padding: 64px 0 28px; }
  .modes { position: relative; right: auto; width: min(100% - 32px, 640px); margin: 0 auto 48px; flex-direction: row; gap: 12px; }
  .modes { flex-wrap: wrap; }
  .modes .mode { flex: 1 1 0; }
  .modes-cap { flex: 0 0 100%; margin: 0; }
  .bar { grid-template-columns: 130px 1fr 56px; font-size: 13.5px; }
}
@media (max-width: 560px) {
  .grid2, .shifts, .fams { grid-template-columns: 1fr; }
  .crow { grid-template-columns: 112px 1fr 40px; font-size: 13px; }
  .readout { grid-template-columns: 1fr 1fr; }
  .strip .seq { grid-template-columns: 64px repeat(8, 1fr); }
  .grid4 .chip.r { display: none; }
}