:root{color-scheme:light;--paper:#faf8f5;--ink:#292524;--muted:#625e5a;--line:#d0d1ca;--green:#738b71;--tank:#e1eae0;font-family:"Avenir Next",Avenir,"Helvetica Neue",sans-serif;color:var(--ink);background:var(--paper);font-size:16px}
*{box-sizing:border-box}body{margin:0}main{max-width:1100px;margin:0 auto;padding:24px 32px}header{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:18px;margin-bottom:24px}h1{font-size:38px;letter-spacing:-1.5px;line-height:1.1;margin:0;font-weight:650}h2{font-size:18px;margin:0 0 10px;font-weight:600}p{margin:0;line-height:1.5}.actions{display:flex;gap:12px}button{font:inherit;color:inherit;background:transparent;border:1px solid #899186;border-radius:8px;padding:10px 18px;cursor:pointer}button:hover{background:#e8ebe3}button:active{background:#d8dfd4}button.primary{background:var(--green);color:white;border-color:var(--green)}button:focus-visible,canvas:focus-visible,#scrub:focus-visible,summary:focus-visible{outline:3px solid #836522;outline-offset:4px}.game{display:grid;grid-template-columns:minmax(0,min(600px,calc(100svh - 230px))) minmax(230px,1fr);gap:48px;padding:0 16px}.tank-wrap{position:relative;aspect-ratio:1}#tank{display:block;width:100%;height:100%;border:2px solid #7c9379;border-radius:12px;background:var(--tank);touch-action:none;cursor:grab}#tank:active{cursor:grabbing}#paused{position:absolute;inset:0;display:grid;place-items:center;background:#faf8f5a8;font-size:30px;border-radius:12px;pointer-events:none}#paused[hidden]{display:none}aside{padding-top:12px}.readouts{display:grid;gap:28px}#next{display:block;margin-left:-5px}#score{font-size:38px;line-height:1.15;font-variant-numeric:tabular-nums}#water{font-size:21px}.random{color:var(--muted);font-size:15px}.instructions{border-top:1px solid var(--line);margin-top:30px;padding-top:28px}.instructions p{color:var(--muted);font-size:15px;margin-bottom:26px}#status{font-size:14px;color:#75542c;min-height:42px}.stir{display:flex;align-items:center;gap:20px;margin-top:16px}.stir button{font-size:30px;width:48px;height:48px;line-height:1;padding:0;border-radius:50%}#scrub{height:44px;flex:1;position:relative;touch-action:none;cursor:ew-resize}#scrub:before{content:"";position:absolute;left:0;right:0;top:15px;height:14px;border-radius:7px;background:#dedfda}#flow-mark{position:absolute;left:50%;top:7px;width:3px;height:30px;background:var(--ink)}.caption{text-align:center;font-size:14px;color:var(--muted);margin-top:4px}.sequence{display:flex;align-items:center;gap:32px;border-top:1px solid var(--line);margin-top:28px;padding:24px 0 12px}.sequence h2{white-space:nowrap;font-size:16px;margin:0}#sequence{display:flex;align-items:center;justify-content:space-between;gap:8px;flex:1}#sequence canvas{width:clamp(32px,5vw,70px);height:72px}#sequence span{color:var(--muted)}footer{display:flex;justify-content:space-between;gap:24px;color:var(--muted);font-size:13px;border-top:1px solid var(--line);padding-top:16px;margin-top:12px}details{max-width:350px}summary{cursor:pointer}details p{margin:12px 0}a{color:#4f694c}
@media(max-width:740px){main{padding:16px}.game{display:flex;flex-direction:column;gap:8px;padding:0}header{margin-bottom:14px;padding-bottom:14px}h1{font-size:28px;letter-spacing:-1px}.actions{gap:6px}button{padding:8px 11px;font-size:14px}aside{display:contents}.readouts{order:-1;display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px;padding:0 2px 10px;align-items:start}.readouts h2{font-size:14px;margin:0 0 5px}.readouts section:first-child{display:grid;grid-template-columns:auto 38px;align-items:center}.readouts section:first-child h2{grid-column:1/-1}#next{width:38px;height:38px;grid-column:2;grid-row:2;margin:0}.random{font-size:11px;max-width:48px;grid-row:2}#score{font-size:28px}#water{font-size:17px;line-height:1.7}.instructions{display:flex;flex-wrap:wrap;gap:4px 12px;margin-top:10px;padding-top:14px}.instructions h2{font-size:14px;width:82px;margin:0}.instructions p{font-size:13px;flex-basis:calc(100% - 94px);margin-bottom:5px}#status{min-height:0;font-size:13px}.sequence{display:block;margin-top:16px;padding:16px 0 0}.sequence h2{margin-bottom:8px}#sequence{gap:2px}#sequence canvas{width:36px;height:auto;aspect-ratio:76/80}#sequence span{font-size:12px}.stir{margin-top:10px}.caption{font-size:12px}footer{font-size:11px;gap:12px}footer>span{max-width:150px}details{max-width:170px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto}}

.stir svg{width:25px;height:25px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;vertical-align:middle}

button:disabled{opacity:.45;cursor:default}