/* Stillpoint shared design system. Static, local assets; no framework or remote fonts. */
:root {
  color-scheme: dark;
  --dark: #101416; --dark-card: #171d20; --card: #171d20; --border: #344047;
  --text: #d5dfe2; --text-dim: #a6b6bd; --dim: #a6b6bd;
  --cyan: #38ded5; --green: #4de0a5; --magenta: #b69aff; --yellow: #f2bc62; --orange: #ff9285;
  --kv: var(--magenta); --storage: var(--yellow); --cold: var(--orange); --restored: var(--green);
  --neon-cyan: var(--cyan); --neon-green: var(--green); --neon-magenta: var(--magenta);
  --neon-yellow: var(--yellow); --neon-orange: var(--orange);
  --mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  --pixel: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 110px; }
body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; background: var(--dark); color: var(--text); line-height: 1.75; }
[hidden] { display: none !important; }
a { color: var(--cyan); text-underline-offset: 4px; overflow-wrap: anywhere; }
a:hover { color: #edffff; }
button { font: inherit; cursor: pointer; }
a:focus-visible, button:focus-visible, input:focus-visible, [tabindex]:focus-visible { outline: 2px solid var(--cyan); outline-offset: 5px; }
[id] { scroll-margin-top: 110px; }
.skip-link { position: fixed; top: 8px; left: 16px; z-index: 200; padding: 12px 20px; background: var(--cyan); color: #101416; transform: translateY(-160%); }
.skip-link:focus { transform: none; }
nav.site-nav { position: sticky; inset: 0 0 auto; z-index: 100; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 18px max(24px, calc((100vw - 1200px) / 2)); background: #101416f2; backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); }
nav.site-nav .logo { font-family: var(--pixel); font-size: 17px; font-weight: 650; letter-spacing: .18em; color: #f1f7f7; text-decoration: none; text-shadow: none; white-space: nowrap; }
.logo-symbol { display: inline-grid; place-items: center; width: 24px; height: 24px; margin-right: 10px; border: 1px solid var(--cyan); border-radius: 50%; color: var(--cyan); font-size: 12px; }
nav.site-nav .links { display: flex; align-items: center; flex-wrap: wrap; gap: 6px 22px; }
nav.site-nav .links a { margin: 0; padding: 7px 0; color: var(--text-dim); font-size: 13px; text-decoration: none; }
nav.site-nav .links a:hover, nav.site-nav .links a[aria-current] { color: #fff; }
.nav-toggle { color: var(--text); background: transparent; border: 1px solid var(--border); padding: 8px 14px; border-radius: 6px; }
main { max-width: 1000px; margin: 0 auto; padding: 72px 28px 100px; min-width: 0; }
main.home { max-width: none; padding: 0; }
h1, h2, h3 { color: #f0f5f5; text-shadow: none; letter-spacing: -.035em; text-transform: none; line-height: 1.2; }
h1 { font-size: clamp(32px, 4.5vw, 52px); font-weight: 550; margin: 0 0 24px; }
h2 { font-size: clamp(26px, 3.5vw, 38px); font-weight: 550; margin: 40px 0 20px; }
h3 { font-size: 20px; font-weight: 600; }
p { margin: 0 0 18px; }
.home > section { max-width: 1200px; margin: 0 auto; padding: 84px 28px; border-bottom: 1px solid var(--border); }
.home h2 { text-align: left; margin: 8px 0 20px; }
.eyebrow, .section-kicker { font: 11px/1.6 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--cyan); margin-bottom: 24px; }
.section-sub, .lede { color: var(--text-dim); max-width: 720px; font-size: 17px; margin-bottom: 32px; }
.btn, .download { display: inline-flex; align-items: center; justify-content: center; gap: 12px; padding: 12px 20px; border: 1px solid var(--cyan); border-radius: 5px; background: var(--cyan); color: #102124; text-decoration: none; font-size: 14px; font-weight: 600; box-shadow: none; }
.btn:hover, .download:hover { background: #b8f2ed; color: #102124; box-shadow: none; }
.btn-secondary { background: transparent; color: var(--text); border-color: var(--border); }
.btn-secondary:hover { background: #263438; color: #fff; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0; }
.home .hero { display: grid; grid-template-columns: 1fr 1.15fr; gap: 48px; align-items: center; min-height: 760px; padding-top: 64px; padding-bottom: 64px; }
.hero h1 { font-size: clamp(46px, 5.2vw, 74px); line-height: 1.04; max-width: 560px; margin-bottom: 28px; }
.hero h1 em { font-style: normal; color: var(--cyan); }
.hero .sub { font-size: 18px; max-width: 470px; color: var(--text-dim); }
.hero-proof { border-top: 1px solid var(--border); padding-top: 20px; font-size: 13px; max-width: 440px; color: var(--text-dim); }
.hero-proof strong { color: var(--green); }
.context-figure { margin: 0; min-width: 0; border: 1px solid var(--border); border-radius: 14px; background: #141b1e; overflow: hidden; }
.figure-head { display: flex; justify-content: space-between; gap: 16px; padding: 18px 22px; border-bottom: 1px solid var(--border); font: 10px var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--text-dim); }
.figure-head span:first-child { color: var(--cyan); }
.context-scene { height: 360px; position: relative; perspective: 950px; overflow: hidden; background: radial-gradient(ellipse at 50% 50%, #21404666, transparent 65%), linear-gradient(#9ac1c508 1px, transparent 1px), linear-gradient(90deg, #9ac1c508 1px, transparent 1px); background-size: auto, 32px 32px, 32px 32px; }
.scene-label { position: absolute; left: 22px; top: 18px; font: 11px var(--mono); color: var(--text-dim); z-index: 2; }
.runtime-world { position: absolute; left: 50%; top: 43%; width: 240px; height: 170px; margin: -85px -120px; transform-style: preserve-3d; transform: rotateX(54deg) rotateZ(-28deg); transition: opacity .5s, transform .7s; }
.recurrent-core { position: absolute; width: 76px; height: 76px; top: 47px; left: 22px; transform-style: preserve-3d; transform: translateZ(45px); }
.core-face { position: absolute; inset: 0; border: 1px solid #b6faf3; background: #367a7cbb; box-shadow: inset 0 0 28px #97e9dc22; }
.core-face.front { transform: translateZ(38px); }
.core-face.back { transform: translateZ(-38px); }
.core-face.left { transform: rotateY(90deg) translateZ(-38px); }
.core-face.right { transform: rotateY(90deg) translateZ(38px); }
.core-face.top { transform: rotateX(90deg) translateZ(38px); }
.core-face.bottom { transform: rotateX(90deg) translateZ(-38px); }
.kv-layer { position: absolute; left: 122px; top: 30px; width: 114px; height: 120px; border: 1px solid #b5c6da99; background: linear-gradient(135deg, #adbed826, #adbed805); transform: translateZ(var(--z)); transition: width .65s, opacity .5s; }
.kv-layer:nth-child(2) { --z: -24px; }
.kv-layer:nth-child(3) { --z: 0px; }
.kv-layer:nth-child(4) { --z: 24px; }
.kv-layer:nth-child(5) { --z: 48px; }
.kv-layer:nth-child(6) { --z: 72px; }
.context-scene[data-volume="short"] .kv-layer { width: 64px; }
.context-scene[data-volume="short"] .kv-layer:nth-child(n+5) { opacity: 0; }
.context-scene[data-step="select"] .runtime-world { opacity: .28; }
.context-scene[data-step="restart"] .runtime-world { opacity: 0; transform: rotateX(54deg) rotateZ(-28deg) translateZ(-40px); }
.engine-off { position: absolute; top: 40%; left: 0; right: 0; text-align: center; color: var(--text-dim); opacity: 0; font: 13px var(--mono); }
.context-scene[data-step="restart"] .engine-off { opacity: 1; }
.disk-checkpoint { position: absolute; left: 50%; bottom: 23px; transform: translateX(-50%); width: 78%; border: 1px dashed #526268; border-radius: 6px; padding: 12px 16px; background: #151d20; font: 11px/1.6 var(--mono); color: var(--text-dim); }
.disk-checkpoint strong { color: var(--text-dim); font-weight: 500; }
.checkpoint-payload { display: flex; gap: 12px; margin-top: 6px; visibility: hidden; }
.checkpoint-payload span { border: 1px solid #6eb8b2; border-radius: 2px; padding: 2px 8px; color: var(--cyan); }
.context-scene[data-step="persist"] .disk-checkpoint, .context-scene[data-step="restart"] .disk-checkpoint, .context-scene[data-step="restore"] .disk-checkpoint { border-style: solid; border-color: #6eb8b2; }
.context-scene[data-step="persist"] .checkpoint-payload, .context-scene[data-step="restart"] .checkpoint-payload, .context-scene[data-step="restore"] .checkpoint-payload { visibility: visible; }
.diagram-legend { display: flex; gap: 20px; flex-wrap: wrap; padding: 0 22px 16px; color: var(--text-dim); font-size: 11px; }
.diagram-legend span::before { content: ''; display: inline-block; width: 8px; height: 8px; background: var(--cyan); margin-right: 7px; }
.diagram-legend span:last-child::before { background: #b5c6da; }
.diagram-controls { padding: 18px 22px; border-top: 1px solid var(--border); }
.context-steps { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.context-steps button { flex: 1; min-width: 67px; padding: 9px 4px; border: 1px solid var(--border); border-radius: 4px; font-size: 11px; color: var(--text-dim); background: transparent; }
.context-steps button[aria-pressed="true"] { color: #112123; background: var(--cyan); border-color: var(--cyan); }
.volume-control { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; font-size: 11px; color: var(--text-dim); }
.volume-control button, .motion-control { padding: 6px 10px; border: 1px solid var(--border); border-radius: 4px; background: #1b272c; color: var(--text); font-size: 11px; }
.context-figure figcaption { margin: 0; padding: 0 22px 22px; min-height: 114px; font-size: 12px; color: var(--text-dim); }
.context-figure figcaption strong { display: block; color: #ecf7f6; margin-bottom: 5px; font-size: 14px; }
.motion-control { margin: 14px 0 0; }
.evidence-layout { display: grid; grid-template-columns: 1.5fr 1fr; gap: 32px; }
.evidence-chart { margin: 0; padding: 30px; background: var(--card); border: 1px solid var(--border); border-radius: 10px; }
.bar-row { margin: 20px 0 26px; }
.bar-label { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; font-size: 14px; margin-bottom: 10px; }
.bar-label strong { color: #eef5f5; font: 18px var(--mono); }
.bar-track { height: 20px; background: #273237; border-radius: 3px; overflow: hidden; }
.bar { height: 100%; background: #91a7b0; width: 100%; }
.bar.restored { width: 13.1339%; background: var(--cyan); }
.evidence-chart figcaption { font-size: 12px; color: var(--text-dim); }
.evidence-summary { padding: 12px 0; }
.evidence-summary .metric { font-size: 68px; font-weight: 450; letter-spacing: -.06em; color: var(--cyan); line-height: 1.1; }
.evidence-summary p { color: var(--text-dim); font-size: 14px; }
.evidence-summary ul { padding-left: 20px; font-size: 14px; }
.evidence-context, .boundary-note { margin-top: 28px; padding: 20px 24px; border-left: 2px solid #68898b; background: #182226; color: var(--text-dim); font-size: 14px; }
.concept-grid, .why-grid, .pipeline { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.concept-card, .why-card, .pipe-node { border: 1px solid var(--border); background: var(--card); border-radius: 9px; padding: 28px; }
.concept-card h3, .why-card h3, .pipe-node h3 { margin: 0 0 14px; }
.concept-card p, .why-card p, .pipe-node p { color: var(--text-dim); font-size: 15px; margin: 0; }
.pipeline { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.pipe-node .step-number { font: 12px var(--mono); color: var(--cyan); display: block; margin-bottom: 25px; }
.pipe-badge { display: inline-block; margin-top: 20px; border-top: 1px solid var(--border); padding-top: 12px; color: var(--cyan); font: 11px var(--mono); }
.memory-intro { text-align: left; margin: 0 0 36px; max-width: 740px; }
.memory-scene { background: radial-gradient(ellipse at 50% 50%, #244044 0%, #172024 45%, #101416 75%); border: 1px solid var(--border); height: 390px; }
.memory-scene::after { background: linear-gradient(transparent 85%, #101416); }
.memory-axis { background: radial-gradient(circle, #d5f5f2, #7ebcb988 15%, #73bbb530 45%, transparent 70%); box-shadow: 0 0 35px #6cd6c733; }
.memory-orbit.second { border-color: #9bb7c560; }
.second .memory-signal { background: #b5d4d6; box-shadow: 0 0 15px #81b7b9; }
.memory-label.bottom { color: #b2c7cc; }
.memory-world, .memory-orbit { animation-play-state: paused; }
.motion-enabled .memory-scene.in-view:not(.paused) .memory-world, .motion-enabled .memory-scene.in-view:not(.paused) .memory-orbit { animation-play-state: running; }
.memory-boundary { background: #182226; border-color: #68898b; }
.lab-box { border: 0; padding: 0; }
.lab-box > p { max-width: 740px; }
.patch-box { background: var(--card); border: 1px solid var(--border); border-radius: 9px; padding: 28px; margin: 28px 0; }
.patch-head { font: 12px/1.6 var(--mono); color: var(--cyan); margin-bottom: 16px; }
.patch-box p { font-size: 15px; color: var(--text-dim); }
.patch-box strong { color: #e8f0f1; }
.patch-sha { display: flex; flex-wrap: wrap; gap: 8px; border-top: 1px solid var(--border); padding-top: 18px; font: 12px/1.8 var(--mono); }
.pin-list { display: grid; gap: 10px; }
.pin-item { display: flex; justify-content: space-between; gap: 18px; padding: 20px 0; border-top: 1px solid var(--border); font-size: 14px; }
.pin-id { font: 12px var(--mono); color: var(--cyan); margin-right: 16px; }
.status-done { color: var(--green); white-space: nowrap; }
.status-active, .status-next { color: var(--text-dim); white-space: nowrap; }
.table-scroll { overflow-x: auto; max-width: 100%; margin: 20px 0; border: 1px solid var(--border); border-radius: 6px; }
.table-scroll table { min-width: 620px; width: 100%; margin: 0; font-size: 12px; border-collapse: collapse; }
.table-scroll th, .table-scroll td { padding: 12px 14px; border-bottom: 1px solid var(--border); }
.table-scroll th { color: #c0d0d5; font-size: 11px; }
.card, .executive, .paper, .setup, .abstract, .credit, .note { border-color: var(--border); }
.card, .result-card { padding: 28px; }
.executive h2, .result-card h2, .paper h2 { font-size: 23px; letter-spacing: -.025em; }
.principle, .note { background: #25251f; color: #d9c499; border-color: #67604e; }
footer { border-top: 1px solid var(--border); padding: 40px 28px; text-align: center; color: var(--text-dim); font-size: 12px; }
footer p { max-width: 900px; margin: 0 auto 10px; }
footer a { color: var(--cyan); }
/* A shared semantic palette: component identity survives storage and restore. */
.core-face { border-color: var(--cyan); background: #168e91b3; box-shadow: inset 0 0 28px #38ded540, 0 0 14px #38ded520; }
.kv-layer { border-color: #b69affcc; background: linear-gradient(135deg, #9670f54d, #9670f514); }
.context-scene[data-step="select"] .runtime-world { opacity: .72; }
.checkpoint-payload span { border-color: var(--cyan); }
.checkpoint-payload span:last-child { border-color: var(--kv); color: var(--kv); }
.context-scene:is([data-step="persist"], [data-step="restart"], [data-step="restore"]) .disk-checkpoint { border-color: var(--storage); background: #30271a; }
.context-scene:is([data-step="persist"], [data-step="restart"], [data-step="restore"]) .disk-checkpoint strong { color: var(--storage); }
.diagram-legend .legend-kv::before { background: var(--kv); }
.diagram-legend .legend-storage::before { background: var(--storage); }
.diagram-legend .legend-restored::before { background: var(--restored); }
.context-steps button[data-context-step="persist"][aria-pressed="true"] { background: var(--storage); border-color: var(--storage); }
.context-steps button[data-context-step="restore"][aria-pressed="true"] { background: var(--restored); border-color: var(--restored); }
.context-steps button[data-context-step="restart"][aria-pressed="true"] { background: var(--cold); border-color: var(--cold); }
/* Animate the core inside the state-controlled runtime, never the runtime transform. */
.recurrent-core { animation: core-float 6s ease-in-out infinite paused; }
@keyframes core-float { 0%, 100% { transform: translateZ(45px) rotateZ(-4deg); } 50% { transform: translateZ(64px) rotateZ(8deg); } }
.motion-enabled .context-scene.in-view:not([data-step="restart"]) .recurrent-core { animation-play-state: running; }
/* No transitions on lifecycle state: finite WAAPI flows truly pause at their current frame. */
.runtime-world, .kv-layer { transition: none; }
.state-flow { position: absolute; z-index: 3; top: 43%; opacity: 0; padding: 3px 8px; border: 1px solid currentColor; border-radius: 4px; background: #102327; color: var(--cyan); font: 11px var(--mono); pointer-events: none; }
.flow-gdn { left: 29%; }
.flow-kv { left: 60%; color: var(--kv); background: #251e36; }
.context-scene[data-step="compile"] .state-flow::before { content: 'tokens → '; }
.context-scene[data-step="restore"] .state-flow span { display: inline-block; transform: rotate(180deg); }
.restore-success { position: absolute; top: 59%; width: 100%; text-align: center; font: 11px var(--mono); color: var(--restored); visibility: hidden; }
.context-scene[data-step="restore"] .restore-success { visibility: visible; }
.bar { background: var(--cold); transform-origin: left center; }
.bar.restored { background: var(--restored); }
.bar-row:first-of-type .bar-label span { color: var(--cold); }
.bar-row:nth-of-type(2) .bar-label span { color: var(--restored); }
.evidence-chart figcaption { margin-top: 20px; }
.evidence-summary .metric { color: var(--restored); }
.concept-card:first-child { border-top: 2px solid var(--cyan); }
.concept-card:last-child { border-top: 2px solid var(--kv); }
.concept-card:last-child .eyebrow { color: var(--kv); }
.pipe-node:nth-child(2) .step-number, .pipe-node:nth-child(2) .pipe-badge { color: var(--storage); }
.pipe-node:nth-child(3) .step-number, .pipe-node:nth-child(3) .pipe-badge { color: var(--restored); }
/* Flaiwheel stays a distinct knowledge metaphor, not KV transfer. */
.memory-plane { border-color: #38ded580; }
.memory-orbit.second { border-color: #38ded580; }
.second .memory-signal { background: var(--cyan); box-shadow: 0 0 18px #38ded5; }
button:disabled { cursor: default; opacity: .65; }
.no-motion *, .no-motion *::before, .no-motion *::after { transition: none !important; animation-play-state: paused !important; }
@media (max-width: 1000px) {
  .home .hero { grid-template-columns: 1fr 1fr; gap: 28px; }
  nav.site-nav { padding: 16px 24px; }
  nav.site-nav .links { gap: 4px 14px; }
  .hero h1 { font-size: 52px; }
}
@media (max-width: 780px) {
  nav.site-nav { flex-wrap: wrap; gap: 12px; }
  nav.site-nav .links { width: 100%; }
  .js nav.site-nav .nav-toggle { display: block; }
  .js nav.site-nav .links { display: none; }
  .js nav.site-nav .links.is-open { display: flex; flex-direction: column; align-items: stretch; gap: 0; }
  nav.site-nav .links a { padding: 10px 0; }
  .home .hero, .evidence-layout, .memory-layout { grid-template-columns: 1fr; }
  .home .hero { min-height: auto; padding-top: 48px; }
  .hero h1 { font-size: clamp(44px, 9vw, 68px); }
  .hero .sub { max-width: 600px; }
  .context-figure { max-width: 600px; width: 100%; }
  .concept-grid, .why-grid, .pipeline { grid-template-columns: 1fr; }
  .home > section { padding: 56px 22px; }
  .pin-item { flex-wrap: wrap; }
  main { padding: 48px 22px 72px; }
  .card, .result-card, .patch-box, .evidence-chart { padding: 22px; }
  .executive-grid, .setup { grid-template-columns: 1fr; }
  .structure ol { columns: 1; }
  .papers { grid-template-columns: 1fr; }
}
@media (min-width: 781px) { nav.site-nav .nav-toggle { display: none; } }
@media (max-width: 380px) {
  .runtime-world { scale: .85; }
  .figure-head, .diagram-controls { padding-inline: 16px; }
  .context-steps { gap: 4px; }
  .context-steps button { min-width: 62px; }
  .disk-checkpoint { width: 88%; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
@media print {
  :root { color-scheme: light; --text: #111; --text-dim: #333; --dim: #333; --dark: #fff; --card: #fff; --dark-card: #fff; --cyan: #16545a; }
  nav.site-nav, .skip-link, button, .context-figure, .memory-figure { display: none !important; }
  body, main { background: white; color: #111; }
  h1, h2, h3, strong { color: #111; }
  .table-scroll { overflow: visible; }
}