:root{--bg:#0b0d12;--paper:#f2f1ed;--yellow:#f6c945;--mint:#67d3b2;--panel:#151923;--border:#343c49}*{box-sizing:border-box}html{background:var(--bg);color:var(--paper)}body{margin:0;min-width:320px;background:linear-gradient(rgba(255,255,255,.018) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.018) 1px,transparent 1px),var(--bg);background-size:32px 32px;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}button,input{font:inherit}main{width:min(1240px,calc(100% - 40px));margin:auto;padding:48px 0 42px}.intro{max-width:920px}.eyebrow,.step-label{margin:0 0 12px;color:var(--yellow);font-size:12px;font-weight:750;letter-spacing:.16em;text-transform:uppercase}h1{max-width:850px;margin:0;font-size:clamp(44px,6.8vw,92px);font-weight:760;letter-spacing:-.06em;line-height:.94}h1 span{color:var(--mint)}.lede{max-width:700px;margin:22px 0 0;color:#adb6c2;font-size:clamp(16px,2vw,20px);line-height:1.5}.experiment{display:grid;grid-template-columns:minmax(0,1.72fr) minmax(310px,.82fr);gap:18px;margin-top:38px}.play-area,.tuning-panel{border:1px solid var(--border);background:var(--panel)}.play-area{padding:12px}.game-shell{position:relative}canvas{display:block;width:100%;height:auto;aspect-ratio:2/1;background:#111522}.touch-controls{position:absolute;inset:auto 14px 14px;display:none;justify-content:space-between;pointer-events:none}.touch-controls button{min-width:48px;min-height:48px;border:1px solid rgba(255,255,255,.3);border-radius:6px;background:rgba(11,13,18,.72);color:white;font-weight:750;pointer-events:auto;touch-action:none}.touch-controls .jump-button{min-width:84px;color:var(--yellow)}.keyboard-hint{display:flex;justify-content:space-between;gap:12px;padding:12px 4px 1px;color:#9ba6b4;font-size:12px}.keyboard-hint span{display:flex;align-items:center;gap:5px}kbd{border:1px solid #465060;border-bottom-width:2px;border-radius:3px;background:#232a36;padding:2px 6px;color:#e8ebee;font:650 10px ui-monospace,SFMono-Regular,Menlo,monospace}.tuning-panel{display:flex;flex-direction:column;padding:24px}.panel-heading,.slider-row>span,.panel-actions{display:flex;align-items:center;justify-content:space-between;gap:12px}.panel-heading{padding-bottom:22px;border-bottom:1px solid #303744}.panel-heading .step-label{margin-bottom:5px;font-size:9px}h2{margin:0;font-size:24px;letter-spacing:-.035em}.icon-button{width:36px;height:36px;border:0;border-radius:6px;background:transparent;color:#d9dee5;font-size:22px;cursor:pointer}.icon-button:hover{background:#232a36}.slider-stack{display:grid;gap:21px;padding:24px 0}.slider-row{display:grid;gap:12px;color:#d9dee5;font-size:13px}.slider-row output{color:var(--yellow);font:650 12px ui-monospace,SFMono-Regular,Menlo,monospace}.slider-row input{width:100%;accent-color:var(--yellow);cursor:pointer}.panel-actions{margin-top:auto;padding-top:4px}.panel-actions button{min-height:38px;border:1px solid #465060;border-radius:6px;background:transparent;padding:0 13px;color:var(--paper);font-size:13px;font-weight:650;cursor:pointer}.panel-actions button:hover{background:#232a36}.panel-actions .primary{border-color:var(--yellow);background:var(--yellow);color:#10131a}.brief{display:grid;grid-template-columns:auto 1fr auto 1fr auto 1.25fr;gap:13px;align-items:start;margin-top:18px;border-top:1px solid var(--border);padding-top:22px;color:#9ba6b4;font-size:13px;line-height:1.45}.brief p{margin:0}.brief strong{color:#eef0f2;font-weight:650}.brief-number{color:var(--yellow);font:650 11px ui-monospace,SFMono-Regular,Menlo,monospace}@media(max-width:900px){.experiment{grid-template-columns:1fr}.tuning-panel{min-height:440px}.brief{grid-template-columns:auto 1fr}}@media(max-width:620px){main{width:min(100% - 24px,1240px);padding-top:28px}h1{font-size:clamp(42px,13vw,68px)}.lede{margin-top:17px}.experiment{margin-top:28px}.play-area{padding:7px}.touch-controls{display:flex}.keyboard-hint{display:none}.tuning-panel{min-height:0;padding:20px}.panel-actions{flex-wrap:wrap}.panel-actions button{flex:1}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}