@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{font-family:'DM Sans',sans-serif;color:#202d33;background:#f5f4ee;--muted:#697472;--line:#ddded5;--accent:#c3ec93}*{box-sizing:border-box}body{margin:0}button,input,a{-webkit-tap-highlight-color:transparent}button,a,input{outline-offset:5px}button{font:inherit;cursor:pointer}a{color:inherit}header{min-height:88px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px max(24px,calc((100vw - 1320px)/2))}.brand{text-decoration:none;font-size:32px;display:flex;align-items:center;gap:4px}.brand>span{color:#759a4e;font-size:30px}.brand strong{font-size:20px;margin-left:8px;letter-spacing:-1px}.brand small{font-weight:400;color:var(--muted)}.title{font-weight:700;display:flex;gap:10px;align-items:center}.version{font-size:11px;background:#e8ebdf;border:1px solid #d1d8c6;border-radius:5px;padding:4px 7px;color:#56644e}nav{display:flex;gap:24px;font-size:13px}nav a{text-decoration:none}nav button,footer button{border:0;background:none;padding:0;color:inherit}main{max-width:1320px;margin:auto;padding:0 24px}.intro{display:flex;justify-content:space-between;align-items:center;padding:42px 0 32px}.eyebrow{font-size:10px;font-weight:700;letter-spacing:2px;color:var(--muted)}h1,h2,h3{font-family:Manrope,sans-serif}h1{font-size:clamp(40px,5vw,64px);font-weight:600;letter-spacing:-3px;margin:8px 0 12px}h1 em{font-family:Georgia,serif;font-weight:400;color:#668953}p{line-height:1.6}.intro p:last-child{font-size:15px;color:var(--muted);margin-bottom:0}.intro-mark{font:110px Georgia;color:#91ad83;margin-right:30px;transform:rotate(-15deg)}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 312px;gap:26px;align-items:start}.tank{border-radius:13px;overflow:hidden;background:#101c23;color:#c8d5d7;border:1px solid #263941}.tank-top{height:62px;padding:12px 20px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #ffffff12}.tabs{display:flex;gap:4px}.tabs button{border:0;color:#92a4a9;background:transparent;font-size:12px;padding:8px 14px;border-radius:6px}.tabs button.active{background:#2a3d41;color:#daf1d6}#state{font-size:9px;letter-spacing:1.5px}#state i{display:inline-block;width:6px;height:6px;background:#b9ec8e;border-radius:50%;margin-right:8px}.canvas-wrap{position:relative;aspect-ratio:1.25;overflow:hidden;background:#101c23}canvas{display:block;width:100%;height:100%;touch-action:none;cursor:crosshair}.canvas-label{position:absolute;top:22px;left:24px;pointer-events:none}.canvas-label>span{font-size:9px;letter-spacing:2px;color:#a4b7b9}.canvas-label small{display:block;font-size:11px;margin-top:7px;color:#7c969d}.canvas-hint{position:absolute;bottom:18px;left:24px;right:24px;display:flex;justify-content:space-between;font-size:10px;color:#7c969d;pointer-events:none}.tank-bottom{display:flex;gap:8px;flex-wrap:wrap;padding:14px 18px;border-top:1px solid #ffffff12;align-items:center}.tank-bottom button{color:#bccdd0;border:1px solid #34474e;border-radius:5px;background:#192b33;font-size:11px;padding:8px 12px}.tank-bottom #play{background:var(--accent);color:#243723;border-color:var(--accent);min-width:84px}.tank-bottom label{font-size:11px;margin-left:auto;display:flex;align-items:center;gap:6px}input[type=checkbox]{accent-color:#b5dd93}.legend{padding:0 20px 16px;font-size:10px;color:#8ba0a6}aside{padding:8px 8px 0}aside h2{font-size:24px;line-height:1.3;letter-spacing:-.7px;margin:10px 0 25px}.control{margin:0 0 19px}.control label{display:flex;justify-content:space-between;font-size:12px;font-weight:600}.control output{font-size:11px;color:#748363;font-weight:400;font-variant-numeric:tabular-nums}input[type=range]{width:100%;accent-color:#749460;height:20px;margin:9px 0 0;cursor:pointer}.range-ends{display:flex;justify-content:space-between;color:#7d857a;font-size:9px}.control p{font-size:11px;color:var(--muted);margin:9px 0 0}.color-control{display:flex;align-items:center;justify-content:space-between;font-size:12px;margin:0 0 20px}#colors{display:flex;gap:9px}.color{width:23px;height:23px;border:3px solid #f5f4ee;border-radius:50%;background:var(--color)}.color[aria-pressed=true]{outline:1px solid #475e4b;outline-offset:2px}.primary{display:flex;justify-content:space-between;width:100%;border:0;border-radius:6px;background:#273f37;color:#e5f0df;padding:13px 16px;font-size:12px}.keyboard-note{font-size:10px;color:#80877c;line-height:1.6}.experiments{padding:42px 0 20px}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:15px}.section-heading h2{font-size:27px;letter-spacing:-1px;margin:8px 0 22px}.section-heading>span{font-size:11px;color:var(--muted);margin-bottom:26px}.experiment-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.experiment{text-align:left;background:#eeeee5;border:1px solid #dbdfcf;border-radius:8px;padding:23px;color:inherit;transition:background .15s}.experiment:hover{background:#e4e9d9}.experiment.active{border-color:#879e6f;background:#e6ecd9}.experiment-number{font-size:9px;letter-spacing:1.6px;color:#78816c}.experiment h3{font-size:17px;font-weight:600;display:flex;justify-content:space-between;gap:10px}.experiment p{font-size:12px;color:var(--muted);margin-bottom:0}#experiment-note{font-size:12px;color:#61764f;padding-left:2px}.learn{border-top:1px solid var(--line);padding:23px 0}.learn-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:35px}.learn h3{font-size:15px}.learn p{font-size:12px;color:var(--muted)}footer{padding:24px 0;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;font-size:10px;color:var(--muted)}footer button{margin-left:14px;font-size:10px}dialog{border:1px solid #d9dfcf;border-radius:12px;background:#f5f4ee;color:#26352c;max-width:620px;width:calc(100% - 32px);padding:32px;max-height:85vh}dialog::backdrop{background:#101c23aa}dialog p,dialog li{font-size:13px;line-height:1.8}dialog h2{letter-spacing:-1px}.close{float:right;border:0;background:none;padding:5px;color:inherit}@media(min-width:1100px){.canvas-wrap{aspect-ratio:1.32}}@media(max-width:800px){header{flex-wrap:wrap;padding:15px 20px}.brand{font-size:25px}.brand strong{font-size:17px}nav{font-size:11px;gap:14px}.title{font-size:13px}.workspace{grid-template-columns:1fr}aside{display:grid;grid-template-columns:1fr 1fr;gap:0 20px;padding:12px 0}aside>.eyebrow,aside>h2{grid-column:1/-1}aside h2{margin-bottom:22px}.primary{align-self:start}.keyboard-note{margin-top:0}.experiment-grid,.learn-grid{gap:12px}.experiment{padding:16px}.section-heading>span{display:none}}@media(max-width:520px){main{padding:0 16px}header{gap:12px}nav{width:100%;justify-content:space-between}.intro{padding:26px 0}.intro-mark{display:none}.intro p:last-child{font-size:13px}h1{letter-spacing:-2px}.tank-top{padding:10px 12px}.tabs button{padding:7px 10px}#state{font-size:8px;letter-spacing:.5px}.canvas-wrap{aspect-ratio:1}.canvas-label{left:15px;top:16px}.canvas-hint{left:15px;right:15px;font-size:9px}.tank-bottom{gap:6px;padding:12px}.tank-bottom button{padding:8px;font-size:10px}.tank-bottom label{margin-left:0}.legend{padding-left:12px;font-size:9px}.experiment-grid,.learn-grid{grid-template-columns:1fr}.experiment h3{margin:10px 0}.experiments{padding-top:26px}.section-heading h2{font-size:25px}.learn-grid{gap:2px}footer{flex-direction:column}.version{font-size:10px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}

[hidden]{display:none!important}.simulation-picker{display:grid;grid-template-columns:235px 1fr auto;gap:26px;align-items:center;padding:20px 24px;margin:0 0 14px;background:#e9eddf;border:1px solid #d6ddca;border-radius:10px}.simulation-picker label{display:block;margin-bottom:9px}.simulation-picker select{font:600 17px Manrope,sans-serif;width:100%;color:#2a4034;background:#f5f6ee;border:1px solid #c7d1bc;border-radius:6px;padding:10px;cursor:pointer}.simulation-picker p{font-size:13px;color:#5e705d;margin:0}.picker-note{font-size:10px;line-height:1.8;color:#7c8872}.source-control{display:flex;justify-content:space-between;gap:15px;align-items:center;padding:2px 4px 16px;color:#66745f;font-size:11px}.source-control label{display:flex;align-items:center;gap:7px}.source-control>span{font-size:10px}@media(max-width:800px){.simulation-picker{grid-template-columns:220px 1fr;gap:15px}.picker-note{display:none}.source-control{align-items:start}.source-control>span{max-width:45%;text-align:right}}@media(max-width:520px){.simulation-picker{grid-template-columns:1fr;padding:17px;gap:10px}.simulation-picker p{font-size:12px}.source-control{font-size:10px}.source-control>span{font-size:9px}}

.comparison-panel body>header,.comparison-panel .intro,.comparison-panel .learn,.comparison-panel footer{display:none!important}.comparison-panel main{padding:14px;max-width:none}.comparison-panel .workspace{display:block}.comparison-panel .simulation-picker{grid-template-columns:1fr;margin-bottom:10px;padding:12px;gap:8px}.comparison-panel .simulation-picker select{font-size:15px}.comparison-panel .simulation-picker p{font-size:11px}.comparison-panel .picker-note,.comparison-panel .source-control>span{display:none}.comparison-panel .source-control{padding-bottom:12px}.comparison-panel .tank-top{padding:10px 12px}.comparison-panel .canvas-wrap{aspect-ratio:1.15}.comparison-panel .canvas-label{top:15px;left:15px}.comparison-panel .canvas-label>span{font-size:8px}.comparison-panel #play,.comparison-panel #step{display:none}.comparison-panel #state{font-size:8px}.comparison-panel aside{display:grid;grid-template-columns:1fr 1fr;gap:0 16px;padding:20px 0 0}.comparison-panel aside>h2,.comparison-panel aside>.eyebrow{display:none}.comparison-panel .control{margin-bottom:15px}.comparison-panel .control p{display:none}.comparison-panel .range-ends{font-size:8px}.comparison-panel .color-control{grid-column:1/-1;margin-bottom:15px}.comparison-panel .primary{align-self:start;grid-column:1/-1}.comparison-panel .keyboard-note{grid-column:1/-1;margin-bottom:0}.comparison-panel .experiments{padding:18px 0 0}.comparison-panel .section-heading h2{font-size:18px;margin:6px 0 12px}.comparison-panel .section-heading>span,.comparison-panel .experiment p{display:none}.comparison-panel .experiment-grid{grid-template-columns:repeat(3,1fr);gap:6px}.comparison-panel .experiment{padding:10px}.comparison-panel .experiment-number{font-size:7px;letter-spacing:.4px}.comparison-panel .experiment h3{font-size:11px;margin:8px 0 0}.comparison-panel #experiment-note{font-size:10px}.comparison-panel #keyboard-help{font-size:9px}nav .compare-link{font-weight:700;color:#537647}@media(max-width:400px){.comparison-panel .tabs button{font-size:10px;padding:7px}.comparison-panel #state{letter-spacing:0;font-size:7px}.comparison-panel .canvas-label small{font-size:9px}.comparison-panel #colors{gap:7px}}

.volume-controls{padding:12px 16px;display:flex;gap:12px;flex-wrap:wrap;align-items:center;border-bottom:1px solid #ffffff16;background:#14252b;font-size:10px;color:#a6bebd}.volume-controls label{display:flex;align-items:center;gap:6px}.volume-controls input[type=range]{width:95px;margin:0}.volume-controls select,.volume-controls button{font:inherit;color:#d0e4d6;background:#223d3e;border:1px solid #3f5955;border-radius:4px;padding:7px}.volume-controls .slice-label{white-space:nowrap}.volume-controls output{font-size:9px;color:#b6d68e}.comparison-panel .volume-controls{padding:9px;gap:8px}.comparison-panel .volume-controls input[type=range]{width:70px}.comparison-panel .volume-controls{font-size:9px}@media(max-width:520px){.volume-controls{font-size:9px;padding:10px;gap:8px}.volume-controls input[type=range]{width:75px}}

.tank.volume-tank .canvas-wrap{aspect-ratio:1}

.obstacle-controls{flex:1 0 100%;border-top:1px solid #75959144;padding-top:12px}.obstacle-controls summary{cursor:pointer;font-weight:600}.obstacle-controls summary span{font-weight:400;opacity:.6;margin-left:8px}.obstacle-controls p{font-size:12px;line-height:1.6;max-width:85ch;opacity:.8}.object-actions{display:flex;gap:8px;flex-wrap:wrap}.object-fields{display:grid;grid-template-columns:repeat(3,minmax(120px,1fr));gap:12px;margin-top:16px}.object-fields label{display:block}.object-fields output{float:right}.object-fields input{width:100%}.object-fields[hidden]{display:none}@media(max-width:600px){.object-fields{grid-template-columns:repeat(2,minmax(100px,1fr))}}

.volume-controls .object-fields label{display:block}.volume-controls .object-fields input[type=range]{width:100%;margin-top:8px}