:root{--nav-h:57px;--bg:#050605;--surface:#121512;--surface-2:#0c0e0c;--text:#f4f6f3;--muted:#a3aaa2;--line:rgba(255,255,255,.08);--accent:#7CF03C;--btn-fg:#0a1a04;--est:#e0a93b;--bad:#ff8a7a;color-scheme:dark}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:"Segoe UI",Roboto,Arial,system-ui,sans-serif;font-size:16px;line-height:1.55;letter-spacing:-.011em;overflow-x:hidden}
.wrap{max-width:1080px;margin:0 auto;padding:0 16px}
.narrow{max-width:640px}
a{color:var(--accent)}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:var(--surface);padding:8px;z-index:10}
.top{position:sticky;top:0;z-index:20;height:var(--nav-h);background:rgba(5,6,5,.85);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);transition:background-color .2s,border-color .2s}
/* over the hero the nav sits on the video's own top scrim: no fill, no blur (hero.js toggles .on-hero) */
.top.on-hero{background:transparent;border-color:transparent;backdrop-filter:none}
.bar{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:56px}
.brand{font-weight:850;letter-spacing:-.03em;color:var(--text);text-decoration:none}.brand span{color:var(--accent)}
.top nav{display:flex;gap:16px;align-items:center}
.top nav a{color:var(--muted);text-decoration:none;font-size:14px}
.top nav a:not(.pill){display:none}
.pill{background:var(--accent);color:var(--btn-fg)!important;padding:7px 14px;border-radius:999px;font-weight:700}
@media(min-width:760px){.top nav a:not(.pill){display:inline}}
section{padding:56px 0;border-top:1px solid var(--line)}
h1,h2,h3{font-weight:850;letter-spacing:-.035em;line-height:1.1;margin:0 0 14px}
h1{font-size:clamp(30px,6vw,56px);max-width:20ch}
h2{font-size:clamp(24px,4vw,36px)}
h3{font-size:18px;letter-spacing:-.02em}
.kick{color:var(--accent);font-weight:700;margin:0 0 12px;font-size:14px}
.lead{color:var(--muted);font-size:18px;max-width:60ch}
.sec-lead{color:var(--muted);max-width:62ch;margin:0 0 24px}
.cta-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}
.btn{display:inline-block;background:var(--accent);color:var(--btn-fg);border:0;border-radius:999px;padding:12px 22px;font:inherit;font-weight:700;text-decoration:none;cursor:pointer}
.btn:hover{box-shadow:0 0 24px rgba(124,240,60,.3)}
.btn.ghost{background:rgba(255,255,255,.04);color:var(--text);border:1px solid rgba(255,255,255,.1)}
.btn.small{padding:8px 16px}
.btn[disabled]{opacity:.5;cursor:default;box-shadow:none}
.grid{list-style:none;margin:0;padding:0;display:grid;gap:14px;grid-template-columns:1fr}
@media(min-width:700px){.grid{grid-template-columns:repeat(3,1fr)}}
.cards li{background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:20px}
.cards p{margin:0;color:var(--muted)}
.plain{padding-left:20px;color:var(--muted);max-width:68ch}.plain li{margin-bottom:10px}
.cols{display:grid;gap:28px;grid-template-columns:minmax(0,1fr)}
@media(min-width:900px){.cols{grid-template-columns:repeat(2,minmax(0,1fr))}}
.fields{padding-left:20px;color:var(--muted)}
code{font-family:Consolas,Menlo,monospace;font-size:.9em;color:var(--text);background:var(--surface-2);padding:1px 5px;border-radius:5px;overflow-wrap:anywhere}
pre{background:var(--surface-2);border:1px solid var(--line);border-radius:14px;padding:14px;overflow-x:auto;max-width:100%}
pre code{background:none;padding:0;font-size:13px;overflow-wrap:normal}
/* demo */
.demo{display:grid;gap:12px;grid-template-columns:minmax(0,1fr)}
.pane{background:var(--surface-2);border:1px solid var(--line);border-radius:16px;overflow:hidden;min-width:0}
.pane-video,.pane-scene{aspect-ratio:16/9}
.pane-video img,.pane-video video{display:block;width:100%;height:100%;object-fit:cover;background:#000}
.pane-graph{display:flex;flex-direction:column}
.graph{height:220px;overflow:hidden}
.graph-key{display:flex;flex-wrap:wrap;gap:4px 12px;font-size:12px;color:var(--muted);padding:6px 12px 0}
.graph-key i{display:inline-block;width:10px;height:3px;margin-right:5px;vertical-align:middle}
.readout{font-family:Consolas,Menlo,monospace;font-size:12px;color:var(--muted);padding:8px 12px;min-height:5em}
.pane-scene canvas{display:block;touch-action:none}
.controls{display:flex;gap:10px;align-items:center;order:1}
#demo-play{min-width:5.5em;text-align:center} /* Play and Pause the same width: the label flips when the explorer starts on screen, and a width change shifted the scrub bar (CLS) */
.pane-graph,.pane-scene{order:2}
.controls input[type=range]{flex:1;min-width:0;accent-color:var(--accent)}
select,input,textarea{font:inherit}
.controls select{background:var(--surface);color:var(--text);border:1px solid var(--line);border-radius:8px;padding:6px}
.demo [hidden]{display:none!important}
.demo-note{color:var(--muted);font-size:14px;margin:10px 0 0}
@media(min-width:900px){
  .demo{grid-template-columns:repeat(2,minmax(0,1fr));grid-template-areas:"video scene" "graph graph" "controls controls"}
  .pane-video{grid-area:video}.pane-scene{grid-area:scene}.controls{grid-area:controls}
  .pane-graph{grid-area:graph;display:grid;grid-template-columns:minmax(0,1fr) 300px;grid-template-rows:auto 1fr}
  .graph{grid-row:1/3;height:250px}
  .graph-key,.readout{grid-column:2;border-left:1px solid var(--line)}
  .demo.no-webgl{grid-template-areas:"video video" "graph graph" "controls controls"}
  .demo.no-webgl .pane-video{justify-self:center;width:100%;max-width:720px}
}
.legend{color:var(--muted);font-size:14px;margin-top:14px}
.sw{display:inline-block;width:10px;height:10px;border-radius:50%;margin:0 6px 0 12px;vertical-align:middle}
.sw:first-child{margin-left:0}
.sw.head+.sw,.sw.left+.sw{margin-left:-3px}
/* device colours match DEVICES in js/demo.js */
.sw.head{background:#7CF03C}.sw.left{background:#4cc9f0}.sw.right{background:#f472b6}.sw.est{background:var(--est)}
/* stats */
.stats{display:grid;gap:12px;grid-template-columns:repeat(2,minmax(0,1fr));margin:0}
@media(min-width:700px){.stats{grid-template-columns:repeat(4,minmax(0,1fr))}}
.stats div{background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:18px}
.stats dt{color:var(--muted);font-size:13px}
.stats dd{margin:4px 0 0;font-size:20px;font-weight:800;letter-spacing:-.03em}
#catalog:has(#stats[hidden]){display:none}
/* form */
form label{display:block;margin-bottom:16px;font-weight:600}
form input:not([type=checkbox]),form select,form textarea{display:block;width:100%;margin-top:6px;background:var(--surface);color:var(--text);border:1px solid rgba(255,255,255,.14);border-radius:12px;padding:10px 12px}
form input:focus,form select:focus,form textarea:focus{outline:2px solid var(--accent);outline-offset:1px}
fieldset{border:1px solid var(--line);border-radius:12px;margin:0 0 16px;padding:10px 14px}
legend{font-weight:600;padding:0 6px}
label.check{font-weight:400;display:flex;gap:8px;align-items:flex-start;margin-bottom:8px}
label.check input{margin-top:5px}
.err{display:block;color:var(--bad);font-size:14px;font-weight:400}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.privacy{color:var(--muted);font-size:14px}
#request-status{margin-top:12px;color:var(--muted)}
.thanks{background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:24px}
footer{border-top:1px solid var(--line);padding:32px 0;color:var(--muted);font-size:14px}
.foot p{margin:4px 0}
/* ---------- fonts (self-hosted, OFL; see fonts/LICENSE.txt) ---------- */
@font-face{font-family:"Inter";src:url(fonts/inter-var.woff2) format("woff2");font-weight:100 900;font-display:optional}
@font-face{font-family:"Inter Fallback";src:local("Arial");size-adjust:107.4%;ascent-override:90.2%;descent-override:22.48%;line-gap-override:0%}
@font-face{font-family:"HUD Mono";src:url(fonts/hud-mono.woff) format("woff");font-weight:400;font-display:swap}
:root{--void:#050605;--ink:#f4f6f3;--dim:#6d756c;--hair:rgba(244,246,243,.10);--head:#7CF03C;--left:#4cc9f0;--right:#f472b6;
  --sans:"Inter","Inter Fallback","Segoe UI",Roboto,Arial,system-ui,sans-serif;--mono:"HUD Mono","Cascadia Mono",Consolas,ui-monospace,monospace}
body{font-family:var(--sans)}

/* ---------- hero: sticky stage in a 240svh track (motion spec v2) ----------
   Only transform and opacity change at runtime (js/hero.js). Phones and reduced motion don't pin. */
.hero-track{position:relative;height:240svh;margin-top:calc(-1 * var(--nav-h))}
.stage{position:sticky;top:0;height:100svh;min-height:560px;overflow:hidden;background:var(--void);isolation:isolate;padding:0;border:0;color:var(--ink)}
.h-screen,.h-band{position:absolute;inset:0}
.h-vwrap{position:absolute;inset:0;overflow:hidden;transform-origin:50% 50%;border-radius:16px;box-shadow:0 0 0 1px var(--hair);background:var(--void)}
.h-poster img,.h-video video{position:absolute;inset:0;display:block;width:100%;height:100%;object-fit:cover;object-position:60% 50%}
.h-video video{opacity:0;transition:opacity .4s cubic-bezier(.4,0,.2,1)}
.h-video video.on{opacity:1}
.h-scrim{position:absolute;inset:0;background:
  linear-gradient(90deg,rgba(5,6,5,.88) 0%,rgba(5,6,5,.84) 30%,rgba(5,6,5,.40) 44%,rgba(5,6,5,.15) 53%,rgba(5,6,5,.15) 70%,rgba(5,6,5,.30) 100%),
  linear-gradient(180deg,rgba(5,6,5,.62) 0%,rgba(5,6,5,0) 13%,rgba(5,6,5,0) 76%,rgba(5,6,5,.80) 100%)}
.h-dark{position:absolute;inset:0;background:#000;opacity:0}
.h-figscrim{position:absolute;left:0;top:0;width:520px;height:520px;margin:-260px 0 0 -260px;border-radius:50%;z-index:2;opacity:0;
  background:radial-gradient(closest-side,rgba(5,6,5,.55),rgba(5,6,5,.35) 55%,rgba(5,6,5,0))}
.h-figure,.h-stream{position:absolute;inset:0;display:block;width:100%;height:100%;pointer-events:none}
.h-figure{z-index:3}.h-stream{z-index:5}
.h-leaders{position:absolute;inset:0;width:100%;height:100%;z-index:4;pointer-events:none;overflow:visible;opacity:0}
.h-leaders line{stroke-width:1;stroke-linecap:round}
.h-leaders line.k{stroke:rgba(5,6,5,.7);stroke-width:4}
.h-leaders .lh{stroke:var(--head)}.h-leaders .ll{stroke:var(--left)}.h-leaders .lr{stroke:var(--right)}
.h-legend{position:absolute;left:0;top:0;z-index:5;display:flex;flex-direction:column;gap:6px;font-size:12px;color:var(--muted);opacity:0;white-space:nowrap}
.h-legend span{display:flex;align-items:center;gap:8px}
.h-legend .trio{display:inline-flex;gap:4px}
.h-legend .dot{width:8px;height:8px;border-radius:50%}
.h-legend .dot.head{background:var(--head)}.h-legend .dot.left{background:var(--left)}.h-legend .dot.right{background:var(--right)}
.h-legend .dash{width:20px;height:0;border-top:1px dashed var(--est);opacity:.6}
.h-clip{display:none}
/* copy column */
.h-copy{position:absolute;z-index:6;left:72px;top:clamp(84px,20.5svh,184px);width:min(690px,54vw)}
.stage .kick{font-size:15px;font-weight:600;color:var(--accent);margin:0 0 18px;display:flex;align-items:center;gap:10px}
.stage .kick i{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px var(--accent)}
.h-h1,.h-closeline{font-weight:850;letter-spacing:-.04em;line-height:.98;margin:0;text-wrap:balance;max-width:none}
.h-h1{font-size:clamp(40px,min(4.3vw,6.9svh),62px)}
.stage .lead{color:#c3c9c2;margin:22px 0 0;line-height:1.5;font-size:18px;max-width:52ch;text-wrap:pretty}
.stage .ctas{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap}
.stage .btn{display:inline-flex;align-items:center;justify-content:center;height:50px;padding:0 24px;font-size:16px;letter-spacing:-.01em;white-space:nowrap}
.stage .btn.pri{box-shadow:0 0 0 1px rgba(124,240,60,.5),0 10px 40px -8px rgba(124,240,60,.45)}
.stage .btn.sec{background:rgba(5,6,5,.5);color:var(--ink);border:0;box-shadow:inset 0 0 0 1px rgba(244,246,243,.22)}
.stage .btn.small{height:auto;padding:8px 16px;font-size:14px}
.segs{list-style:none;margin:30px 0 0;padding:0;display:grid;gap:7px;font-size:13px;font-weight:500;color:var(--muted)}
.segs em{font-style:normal;color:var(--ink)}
.cred{margin:18px 0 0;font-size:12.5px;color:#858d84} /* B5: --dim gave 4.26:1 on the phone void (axe); this is 5.5:1 */
.cred .short{display:none}
/* rail, cue, beat titles, facts */
.h-rail{position:absolute;z-index:6;left:72px;right:360px;bottom:24px;display:flex;gap:28px;align-items:center;font-size:12px;color:var(--muted);white-space:nowrap}
.h-rail .h-cliplabel{color:#c3c9c2}
.h-rail .k span{font:400 12px var(--mono);font-variant-numeric:tabular-nums;color:var(--ink);margin-left:6px}
/* fixed number boxes: '—' to '1033' / '14.497' (and the HUD Mono swap) must not move the bar (CLS 0) */
.h-rail .h-fr{display:inline-block;width:2.6em}.h-rail .h-t{display:inline-block;width:3.8em;text-align:right}
.h-rail .h-bar{flex:1;min-width:60px;height:1px;background:rgba(244,246,243,.18);position:relative}
.h-rail .h-bar i{position:absolute;left:0;top:0;bottom:0;width:100%;background:rgba(124,240,60,.45);transform-origin:0 0;transform:scaleX(0)}
.h-cue{position:absolute;z-index:6;left:calc(100% - 328px);bottom:22px;margin:0;font-size:12px;color:var(--muted);display:flex;align-items:center;gap:8px}
.h-cue i{width:1px;height:14px;background:linear-gradient(var(--accent),transparent)}
.h-beat{position:absolute;z-index:6;left:72px;top:96px;margin:0;font-size:15px;font-weight:700;color:var(--muted);letter-spacing:-.015em;opacity:0}
.h-facts{position:absolute;z-index:6;right:72px;top:104px;width:390px;opacity:0}
.h-facts p{margin:0;font-size:20px;font-weight:700;letter-spacing:-.025em;line-height:1.28}
.h-facts p span{color:var(--muted);font-weight:500}
/* beat 3 title card */
.h-close{position:absolute;z-index:6;left:72px;top:clamp(110px,21.8svh,196px);width:min(780px,60vw);pointer-events:none}
/* it overlaps the copy column: only a shown closing lead takes clicks (h-sub ships data-off + inert) */
.h-sub:not([data-off]){pointer-events:auto}
.h-closeline{font-size:clamp(52px,min(5.6vw,8.9svh),80px);line-height:.96}
.h-closeline span{display:block;opacity:0}
.h-live{margin:22px 0 0;font:400 13px var(--mono);font-variant-numeric:tabular-nums;white-space:pre;color:rgba(244,246,243,.72);opacity:0}
.h-live .fr,.h-live .t{color:var(--muted)}
.h-live .head{color:var(--head)}.h-live .left{color:var(--left)}.h-live .right{color:var(--right)}
.h-sub{opacity:0}
.h-sub .lead{max-width:46ch;margin-top:20px}
.h-play{position:absolute;z-index:7;right:48px;bottom:18px}
.h-play[hidden]{display:none}
.stage [data-off]{visibility:hidden}
/* B5: the scroll beats change these every frame; own layers halve GPU raster work while scrolling. */
@media (min-width:768px){
  .hero-track:not(.rm) :is(.h-vwrap,.h-dark,.h-figscrim,.h-leaders,.h-legend,.h-copy,.h-beat,.h-facts,.h-closeline span,.h-live,.h-sub){will-change:transform,opacity}
}
/* short desktop viewports: keep the CTA row above the fold */
@media (min-width:768px) and (max-height:780px){
  .stage .lead{font-size:16px;margin-top:14px}.stage .ctas{margin-top:18px}
  .segs{margin-top:18px;gap:4px}.cred{margin-top:10px}.stage .kick{margin-bottom:12px}
}
@media (min-width:768px) and (max-height:660px){.segs,.cred{display:none}}
/* narrow desktop and portrait tablets: the rail is wider than the space left of the stream
   panel, so the clip label takes its own line instead of running under the scroll cue */
@media (min-width:768px) and (max-width:1199px){
  .h-rail{flex-wrap:wrap;row-gap:6px;column-gap:20px}
  .h-rail .h-cliplabel{flex-basis:100%}
}

/* reduced motion: hero.js sets .rm from matchMedia (no pin, no beats). Without JS nothing moves,
   so the stage stays pinned; the shrink when .rm lands happens below the fold (no layout shift). */
.hero-track.rm{height:auto}
.rm .stage{position:relative;height:auto;min-height:0;overflow:visible}
.rm .h-screen{position:relative;height:100svh;min-height:560px;overflow:hidden}
.rm .h-cue,.rm .h-beat,.rm .h-facts,.rm .h-live{display:none}
.rm .h-close{position:relative;left:auto;top:auto;width:auto;max-width:1080px;margin:0 auto;padding:56px 72px 8px}
.rm .h-closeline span,.rm .h-sub{opacity:1}
.rm .h-close{pointer-events:auto}
.rm .h-sub .ctas{display:none}
.rm .h-video video{transition:none}

/* phones: one static stacked hero, no pinning */
@media (max-width:767px){
  .hero-track,.hero-track.rm{height:auto}
  .stage,.rm .stage{position:relative;height:auto;min-height:0;overflow:visible}
  .h-screen,.rm .h-screen{position:relative;height:auto;min-height:0}
  .h-band{position:relative;height:300px;overflow:hidden}
  .h-vwrap{border-radius:0;box-shadow:none}
  .h-poster img,.h-video video{object-position:50% 60%}
  .h-scrim{background:linear-gradient(180deg,rgba(5,6,5,.70) 0%,rgba(5,6,5,.05) 22%,rgba(5,6,5,.10) 70%,rgba(5,6,5,.92) 100%),linear-gradient(90deg,rgba(5,6,5,.05) 40%,rgba(5,6,5,.45) 100%)}
  .h-figscrim,.h-leaders,.h-rail,.h-cue,.h-beat,.h-facts,.h-live{display:none}
  .h-legend{left:auto;right:16px;top:226px;font-size:11px;gap:4px}
  .h-clip{display:block;position:absolute;z-index:6;left:16px;top:274px;margin:0;font-size:11px;color:#c3c9c2}
  .h-stream{position:relative;inset:auto;width:calc(100% - 32px);height:66px;margin:6px 16px 0}
  .h-copy{position:relative;left:auto;top:auto;width:auto;padding:16px 16px 0}
  .stage .kick{font-size:13px;margin-bottom:10px}
  .h-h1{font-size:30px;line-height:1;letter-spacing:-.035em}
  .stage .lead{font-size:14.5px;margin-top:12px;line-height:1.45}
  .h-copy .ctas{display:block;margin-top:18px}
  .h-copy .btn.pri{display:flex;width:100%;height:48px;font-size:15px}
  .h-copy .btn.sec{display:block;height:auto;margin-top:12px;padding:0;background:none;box-shadow:none;text-align:center;font-size:14px;font-weight:600;text-decoration:underline;text-decoration-color:rgba(244,246,243,.35);text-underline-offset:3px}
  .segs{margin-top:22px;font-size:12.5px;gap:6px;line-height:1.35}
  .cred{margin-top:12px;font-size:12px}.cred .long{display:none}.cred .short{display:inline}
  .h-close,.rm .h-close{position:relative;left:auto;top:auto;width:auto;margin:0;padding:48px 16px 8px}
  .h-closeline{font-size:40px}
  .h-closeline span,.h-sub{opacity:1}
  .h-close{pointer-events:auto}
  .stage .h-sub[data-off]{visibility:visible} /* the lead shows before hero.js (its CTAs stay hidden) */
  .h-sub .ctas{display:none}
  .h-play{left:16px;right:auto;bottom:40px}
}