:root{color-scheme:dark;--night:#102c37;--deep:#0b222c;--paper:#eee9dd;--muted:#a8bdba;--gold:#efd49a;--rule:#ede8d82e;--mint:#8dcfc1}
*{box-sizing:border-box}.shell{max-width:1440px;margin:auto;padding:0 24px}.intro{margin:0 0 30px}.intro h1{margin:0}.intro h2{margin:18px 0 10px;font-size:21px;font-weight:500;letter-spacing:.1em}.intro p:not(.eyebrow){color:var(--muted);font-size:12px;line-height:2.2}.eyebrow{color:var(--gold);font:10px Georgia,serif;letter-spacing:.24em}.workspace{display:grid;grid-template-columns:260px minmax(0,1fr);gap:38px;align-items:start}
.controls{border-top:1px solid var(--gold);padding-top:8px}.controls label{display:block;margin:16px 0 8px;font-size:11px;font-weight:500}input[type=number],select{width:100%;padding:11px 9px;border:1px solid #a8bdba42;background:#0b222c85;color:var(--paper);font:inherit;font-size:14px}button{padding:11px 14px;border:1px solid var(--rule);background:transparent;color:var(--paper);font:inherit;font-size:11px;cursor:pointer}button:hover{color:var(--gold);border-color:var(--gold)}button:disabled{opacity:.45;cursor:default}#play,form button{background:var(--gold);border-color:var(--gold);color:var(--deep);font-weight:700}#play:hover,form button:hover{background:#ffe9b7}form button{width:100%}.presets,.playback{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}.check{line-height:1.8}.check input{accent-color:var(--gold)}.help,#limit{font-size:11px;line-height:1.9;color:var(--muted)}#error{color:#ffbca8;font-size:11px}
.chart-panel{padding:24px 25px 18px;background:radial-gradient(ellipse at 50% 30%,#21485280,#0d2a3570);border:1px solid #efd49a38;box-shadow:0 22px 60px #000c111a}.stats{display:flex;justify-content:space-between;gap:15px;padding-bottom:18px;border-bottom:1px solid var(--rule);font-size:10px;color:var(--muted)}.stats strong{display:block;font:28px Georgia,serif;color:var(--gold);margin-top:9px;font-variant-numeric:tabular-nums}#chart{display:block;width:100%;height:auto;margin-top:16px;overflow:visible}#grid line{stroke:var(--rule)}#grid text{fill:var(--muted)}#line{stroke:var(--gold)}#point{fill:var(--mint);stroke:var(--deep);stroke-width:2}#scrub{width:100%;margin:12px 0;accent-color:var(--gold)}.chart-panel>label{display:block;margin-top:20px;padding-top:13px;border-top:1px solid var(--rule);font-size:10px}#status{color:var(--gold);font-size:11px;line-height:1.8}#transition{min-height:24px;color:var(--muted);font-size:11px;font-variant-numeric:tabular-nums}.explanation{margin:42px 0 30px;padding-top:28px;border-top:1px solid var(--rule);line-height:2;color:var(--muted);font-size:12px}.explanation h2{color:var(--paper);font-size:17px;font-weight:500}
@media(max-width:1050px){.workspace{gap:24px}.chart-panel{padding-left:17px;padding-right:17px}}@media(max-width:760px){.workspace{grid-template-columns:1fr;gap:25px}.chart-panel{padding:18px 13px}.stats{gap:8px}.stats strong{font-size:24px}.controls label,.help,#limit{font-size:12px}}

.intro{display:flex;align-items:center;gap:clamp(48px,9vw,150px)}.intro-copy h2{margin:0;font-size:21px;letter-spacing:.14em}.intro-copy p{margin:16px 0 0}.eyebrow{margin:0 0 21px}.eyebrow::before{content:"";display:inline-block;vertical-align:middle;width:26px;height:1px;background:var(--gold);margin-right:13px}.explanation{display:grid;grid-template-columns:260px minmax(0,1fr);gap:38px;margin:42px 0 0;padding:34px 0 40px}.explanation h2{margin:0;line-height:1.8}.model-copy{min-width:0}.model-copy p{margin:0 0 13px;font-size:11px;line-height:2}.footer-ad{display:flex;justify-content:center;align-items:flex-start;min-width:0;margin:0 0 28px;overflow:hidden;text-align:center}.footer-ad-content{flex:none;width:max-content;transform-origin:top center}footer .disclaimer{flex:0 0 100%;min-width:0;color:var(--muted);font-size:12px;line-height:1.9;letter-spacing:.03em}footer .disclaimer h2{margin:0 0 6px;color:var(--gold);font-size:12px;font-weight:500;line-height:1.9}footer .disclaimer p{margin:0;overflow-wrap:anywhere}@media(max-width:1050px){.explanation{gap:24px}}@media(max-width:760px){.intro{display:block}.intro-copy{margin-top:25px}.intro-copy h2{font-size:18px}.explanation{grid-template-columns:1fr;gap:15px;margin-top:31px;padding:29px 0}.model-copy p{font-size:12px}}

#chart{width:100%;height:100%;margin:0;image-rendering:pixelated}.canvas-wrap{height:440px;margin-top:12px;overflow:hidden;border:1px solid var(--rule)}#seed{display:block;width:100%;height:32px;cursor:crosshair;image-rendering:pixelated;touch-action:manipulation}.seed-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:16px 0 10px;font-size:11px;color:var(--muted)}.seed-heading button{padding:7px}.chart-caption{font-size:10px;color:var(--muted);line-height:1.8}.rule-panel{border-top:1px solid var(--rule);margin-top:36px;padding-top:26px}.rule-panel h2{font-size:17px;font-weight:500}.rule-panel p:not(.eyebrow){font-size:11px;color:var(--muted);line-height:2}#rule-table{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:8px}.rule-case{display:flex;flex-direction:column;align-items:center;gap:7px;padding:14px 4px}.neighbors{display:flex;gap:3px}.cell{display:block;width:14px;height:14px;background:#214852;border:1px solid #a8bdba42}.cell.on{background:var(--gold);border-color:var(--gold)}.rule-arrow{color:var(--muted)}.rule-case small{font-size:10px;color:var(--muted)}@media(max-width:760px){#rule-table{grid-template-columns:repeat(4,minmax(0,1fr))}.canvas-wrap{height:360px}.seed-heading{flex-wrap:wrap}}