:root{--ink:#10261d;--muted:#687970;--line:#dfe8e2;--paper:#f8faf8;--glass:rgba(255,255,255,.82);--green:#42c77d;--green-dark:#175b3d;--shadow:0 28px 80px rgba(26,63,44,.12)}
*{box-sizing:border-box}html{background:var(--paper);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif}body{margin:0;min-height:100vh;background:radial-gradient(circle at 80% 12%,rgba(61,203,125,.10),transparent 30%),linear-gradient(rgba(248,250,248,.92),rgba(248,250,248,.97)),repeating-linear-gradient(90deg,transparent 0 31px,rgba(25,76,51,.035) 32px),repeating-linear-gradient(0deg,transparent 0 31px,rgba(25,76,51,.035) 32px)}button,input{font:inherit}button{cursor:pointer}.topbar{height:76px;display:flex;align-items:center;justify-content:space-between;padding:0 clamp(24px,5vw,74px);border-bottom:1px solid rgba(24,74,50,.10);background:rgba(248,250,248,.76);backdrop-filter:blur(16px);position:sticky;top:0;z-index:10}.brand{display:flex;align-items:center;gap:12px}.brand-mark{font-size:29px;color:var(--green)}.brand strong{display:block;letter-spacing:.18em;font-size:14px}.brand small{display:block;color:var(--muted);margin-top:3px;font-size:10px;letter-spacing:.05em}.header-status{display:flex;align-items:center;gap:9px;font-size:12px;color:var(--muted)}.pulse{width:8px;height:8px;background:var(--green);border-radius:50%;box-shadow:0 0 0 6px rgba(66,199,125,.12)}main{max-width:1500px;margin:auto;padding:68px clamp(20px,5vw,72px) 40px}.hero-copy{max-width:900px;margin-bottom:38px}.eyebrow{font-size:10px;letter-spacing:.19em;font-weight:800;color:var(--green-dark);margin:0 0 16px}h1{font-size:clamp(44px,6vw,84px);line-height:.96;letter-spacing:-.055em;margin:0;font-weight:590}h1 em{font-family:Georgia,serif;font-weight:400;color:var(--green);letter-spacing:-.04em}.lead{font-size:15px;line-height:1.75;color:var(--muted);max-width:760px;margin:28px 0 0}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 350px;gap:22px;align-items:start}.stage-card,.inspector{background:var(--glass);border:1px solid rgba(35,90,60,.12);border-radius:24px;box-shadow:var(--shadow);backdrop-filter:blur(18px)}.stage-toolbar{min-height:60px;display:flex;align-items:center;justify-content:space-between;padding:10px 18px;border-bottom:1px solid var(--line);gap:14px}.segmented{display:flex;flex-wrap:wrap;background:#edf3ef;border-radius:12px;padding:3px}.segment{border:0;background:transparent;color:var(--muted);padding:8px 12px;border-radius:9px;font-size:11px;font-weight:750}.segment.active{background:white;color:var(--ink);box-shadow:0 3px 14px rgba(20,55,38,.10)}.stage-hint{font-size:11px;color:var(--muted)}.stage{position:relative;aspect-ratio:16/10;overflow:hidden;background:white}.stage canvas,.stage video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}.stage video{display:none}.corner-tag{position:absolute;top:14px;right:14px;padding:7px 10px;border-radius:999px;background:rgba(14,38,28,.82);color:white;font-size:9px;letter-spacing:.12em;pointer-events:none}.controls{border-top:1px solid var(--line);padding:18px;display:grid;grid-template-columns:auto minmax(160px,1fr) minmax(190px,1fr) auto auto;gap:18px;align-items:end}.control-group label{font-size:10px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);display:block;margin-bottom:8px}.chips{display:flex;gap:6px;flex-wrap:wrap}.chip{border:1px solid var(--line);background:white;border-radius:999px;padding:7px 10px;font-size:11px;color:var(--muted)}.chip.active{background:var(--ink);color:white;border-color:var(--ink)}.slider-group input{width:100%;accent-color:var(--green)}.slider-group output{float:right;color:var(--green-dark);font-size:9px}.toggles{display:grid;gap:5px;font-size:10px;color:var(--muted);white-space:nowrap}.toggles input{accent-color:var(--green)}.toggles b{font-size:8px;color:var(--green-dark)}.export-btn{border:0;border-radius:12px;background:var(--green);color:#062417;font-weight:800;padding:11px 14px;font-size:11px}.inspector{padding:21px;position:sticky;top:98px;max-height:calc(100vh - 120px);overflow:auto}.inspector-title{display:flex;align-items:flex-start;justify-content:space-between}.inspector-title h2{font-size:22px;margin:0;letter-spacing:-.035em}.fps-badge{background:#e7f8ee;color:var(--green-dark);border-radius:999px;font-size:10px;font-weight:900;padding:7px 9px}.metric-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:20px 0}.metric-grid div{background:#f3f7f4;border-radius:13px;padding:11px}.metric-grid .metric-wide{grid-column:1/-1}.metric-grid span{display:block;color:var(--muted);font-size:9px;margin-bottom:4px}.metric-grid strong{font-size:12px;overflow-wrap:anywhere}.inspector-section{border-top:1px solid var(--line);padding-top:16px;margin-top:16px}.inspector-section h3{font-size:10px;letter-spacing:.13em;text-transform:uppercase;color:var(--muted);margin:0 0 12px}.state-vector{display:grid;gap:6px}.state-row{display:grid;grid-template-columns:76px 1fr 54px;align-items:center;gap:8px;font-size:10px}.state-bar{height:5px;background:#edf2ef;border-radius:999px;overflow:hidden}.state-bar i{display:block;height:100%;background:var(--green);border-radius:999px;transition:width .08s linear}.state-row code{text-align:right;color:var(--green-dark);font-size:9px}.layer-stack{display:grid;gap:7px}.layer{display:grid;grid-template-columns:34px 1fr auto;gap:8px;align-items:center;padding:8px 9px;border:1px solid var(--line);border-radius:11px;transition:.18s}.layer b{font-size:10px;color:var(--green-dark)}.layer span{font-size:10px}.layer small{font-size:8px;color:var(--muted)}.layer.dirty{border-color:rgba(66,199,125,.75);background:#effbf4;transform:translateX(3px)}.dirty-nodes{display:flex;flex-wrap:wrap;gap:6px;min-height:28px}.dirty-node,.surface-node{font-size:9px;padding:5px 7px;border-radius:999px;animation:pop .18s ease}.dirty-node{background:#e7f8ee;color:#155839}.surface-node{background:#eef2fa;color:#365184}.empty{color:var(--muted);font-size:10px}.note{font-size:9px;color:var(--muted);line-height:1.55;margin:10px 0 0}.architecture{margin:22px 0 0;display:flex;align-items:center;justify-content:center;gap:16px;background:rgba(255,255,255,.66);border:1px solid rgba(35,90,60,.1);border-radius:18px;padding:18px;overflow:auto}.architecture div{min-width:126px}.architecture span{display:block;font-size:8px;color:var(--muted);letter-spacing:.15em}.architecture strong{font-size:13px}.architecture i{color:var(--green);font-style:normal}footer{text-align:center;color:var(--muted);font-size:10px;padding:28px}@keyframes pop{from{transform:scale(.85);opacity:.2}}@media(max-width:1120px){.workspace{grid-template-columns:1fr}.inspector{position:static;max-height:none}.controls{grid-template-columns:1fr 1fr}}@media(max-width:650px){main{padding-top:45px}h1{font-size:46px}.controls{grid-template-columns:1fr}.topbar{padding:0 18px}.brand small{display:none}.architecture{justify-content:flex-start}.stage-toolbar{align-items:flex-start;flex-direction:column}.stage-hint{display:none}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}

.stage #webglCanvas{display:none}
.stage-actions{display:flex;align-items:center;gap:12px}
.import-link{font-size:10px;color:var(--green-dark);text-decoration:none;border:1px solid var(--line);background:white;padding:7px 9px;border-radius:999px;white-space:nowrap}
.import-link:hover{border-color:var(--green)}
.controls{grid-template-columns:auto minmax(130px,1fr) minmax(130px,1fr) minmax(170px,1fr) auto auto}
@media(max-width:1280px){.controls{grid-template-columns:1fr 1fr 1fr}.stage-actions{align-items:flex-end;flex-direction:column}}
@media(max-width:720px){.controls{grid-template-columns:1fr}.stage-actions{align-items:flex-start}.import-link{display:inline-block}}

.scene-links{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin:0 0 18px}
.scene-links a{font-size:11px;color:var(--green-dark);text-decoration:none;background:white;border:1px solid var(--line);padding:8px 12px;border-radius:999px}
.scene-pills{display:inline-flex;gap:10px;align-items:center;background:white;border:1px solid var(--line);padding:8px 12px;border-radius:999px}
.scene-pills b{font-size:11px;color:var(--green-dark)} .scene-pills small{font-size:10px;color:var(--muted)}

.controls{grid-template-columns:auto repeat(5,minmax(118px,1fr)) auto auto}
@media(max-width:1450px){.controls{grid-template-columns:repeat(4,1fr)}}
@media(max-width:880px){.controls{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.controls{grid-template-columns:1fr}}

.controls{grid-template-columns:auto repeat(7,minmax(112px,1fr)) auto auto}
@media(max-width:1680px){.controls{grid-template-columns:repeat(5,1fr)}}
@media(max-width:1080px){.controls{grid-template-columns:repeat(3,1fr)}}
@media(max-width:650px){.controls{grid-template-columns:1fr}}

/* Deterministic visual-regression layout. */
body.regression-mode .topbar,
body.regression-mode .hero-copy,
body.regression-mode .scene-links,
body.regression-mode .inspector,
body.regression-mode .controls,
body.regression-mode .architecture,
body.regression-mode footer {
  display: none !important;
}
body.regression-mode main {
  max-width: none;
  margin: 0;
  padding: 0;
}
body.regression-mode .workspace {
  display: block;
  margin: 0;
}
body.regression-mode .stage-card {
  border: 0;
  border-radius: 0;
  box-shadow: none;
}
body.regression-mode .stage-toolbar {
  display: none;
}
body.regression-mode .stage {
  width: 100vw;
  height: 100vh;
  aspect-ratio: auto;
  border-radius: 0;
}
body.regression-mode .stage canvas,
body.regression-mode .stage video {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
body.regression-mode .corner-tag {
  display: none;
}