:root{font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#253b3e;background:#fff;font-size:14px;--teal:#16887c;--coral:#d45c4d;--amber:#b7831e;--ink:#253b3e;--violet:#805c9c;--line:#dbe5e4}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,select{cursor:pointer}a{color:#26766e;text-underline-offset:3px}header{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:18px 26px;border-bottom:1px solid var(--line)}h1{font-size:25px;font-weight:650;margin:3px 0 0;letter-spacing:0}h2{font-size:14px;margin:0;font-weight:650;letter-spacing:0}.library{font-size:12px;text-decoration:none}.equation{font-family:Georgia,serif;font-size:19px}main{display:grid;grid-template-columns:260px minmax(0,1fr)}aside{padding:20px 18px;background:#f5f8f8;border-right:1px solid var(--line)}.modes{display:flex;margin-bottom:17px;border:1px solid #a7bfbb;border-radius:4px;overflow:hidden}.modes button{flex:1;border:0;border-right:1px solid #a7bfbb;background:transparent;padding:9px 4px;font-size:12px;color:#324d4b}.modes button:last-child{border:0}.modes button[aria-pressed=true]{background:#286e65;color:white}.preset{display:grid;gap:6px;font-weight:600;margin-bottom:19px}select{background:white;color:var(--ink);border:1px solid #b7cac6;border-radius:3px;padding:7px;min-width:0;max-width:100%}.field{margin:13px 0}.field-head{display:flex;align-items:center;justify-content:space-between;gap:8px}.field-head label{font-size:12px;color:#465d5b}.field-head input{width:73px;padding:4px;border:1px solid #bdcecb;border-radius:3px;font-variant-numeric:tabular-nums;text-align:right;background:white;color:var(--ink)}input[type=range]{width:100%;accent-color:#287f74;cursor:pointer;margin:7px 0 0;min-height:22px}.field:has(input:disabled){opacity:.5}.natural{border-top:1px solid var(--line);margin-top:20px;padding-top:16px}dl{display:grid;grid-template-columns:1fr auto;gap:8px;font-size:12px}dt{color:#627673}dd{margin:0;font-variant-numeric:tabular-nums}.workspace{min-width:0}.scene-heading{display:flex;justify-content:space-between;gap:10px;padding:15px 24px 0;font-size:12px;min-height:35px;background:#edf5f2}#classification{font-weight:650}#scale{color:#647773}#scene{height:350px;position:relative;background:#edf5f2;overflow:hidden}#scene>canvas{width:100%;height:100%;display:block;touch-action:pan-y}.scene-labels{position:absolute;bottom:12px;left:24px;right:24px;display:flex;justify-content:space-between;gap:12px;font-size:11px;pointer-events:none;color:#4b7167}#force-label{color:#956219}#fallback{position:absolute;inset:0;display:grid;place-content:center;padding:20px;text-align:center;font-size:14px}#fallback[hidden]{display:none}.transport{display:grid;grid-template-columns:auto auto 1fr;align-items:center;gap:12px;padding:12px 24px 10px;border-bottom:1px solid var(--line)}.tools{display:flex;gap:4px}.icon{display:grid;place-items:center;width:32px;height:32px;border:1px solid #c4d5d1;border-radius:4px;color:#286e65;background:white}.icon:hover{background:#eef5f2}.icon:disabled{opacity:.4;cursor:not-allowed}.icon svg{width:17px;height:17px}#play{background:#286e65;color:white;border-color:#286e65}.speed{display:flex;align-items:center;gap:7px;font-size:12px}.speed select{padding:5px}#time{text-align:right;font-size:12px;min-width:82px;font-variant-numeric:tabular-nums}#timeline{grid-column:1/-1;margin:0}.readouts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));padding:15px 24px;gap:16px}.readouts span{display:block;color:#687c79;font-size:11px;margin-bottom:5px}.readouts strong{font-size:17px;font-weight:600;white-space:nowrap;font-variant-numeric:tabular-nums}.charts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;padding:10px 24px 0}.plot{min-width:0}.legend{display:flex;justify-content:flex-start;gap:9px;font-size:11px;height:25px;align-items:center}.legend span:before{content:"";display:inline-block;width:8px;height:2px;background:currentColor;margin-right:4px;vertical-align:middle}.legend .muted:before{display:none}.teal{color:var(--teal)}.coral{color:var(--coral)}.amber{color:var(--amber)}.ink{color:var(--ink)}.violet{color:var(--violet)}.muted{color:#6d7d7a}.plot canvas{display:block;width:100%;height:206px}.balance{display:flex;flex-wrap:wrap;gap:8px 18px;padding:10px 24px 18px;font-size:11px;color:#667c77}#response{flex-basis:100%;color:#956219}#error{margin:10px 24px;padding:10px;color:#a33b33;background:#fff2ef}footer{padding:14px 26px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:11px;color:#74837e}footer nav{display:flex;flex-wrap:wrap;gap:14px}button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid #bf763b;outline-offset:2px}
@media(min-width:1550px){#scene{height:410px}.plot canvas{height:240px}}
@media(max-width:1080px){main{grid-template-columns:230px minmax(0,1fr)}.charts{grid-template-columns:1fr 1fr}.plot:last-child{grid-column:1/-1}.readouts{grid-template-columns:1fr 1fr}.scene-labels{font-size:10px}.equation{font-size:16px}}
@media(max-width:700px){header{padding:14px 16px;align-items:flex-start}h1{font-size:22px}.equation{font-size:13px;padding-top:21px}main{display:flex;flex-direction:column}aside{border-right:0;border-bottom:1px solid var(--line);padding:14px 16px}.modes{margin-bottom:12px}.preset{margin-bottom:8px}#fields{display:grid;grid-template-columns:1fr 1fr;gap:0 18px}.field{margin:7px 0}.field-head{gap:4px}.field-head label{font-size:11px}.field-head input{width:60px;font-size:12px}.natural{margin-top:9px;padding-top:10px}.natural dl{grid-template-columns:1fr auto 1fr auto;gap:7px 10px;font-size:11px}#scene{height:285px}.scene-heading{padding:12px 16px 0}.scene-labels{left:16px;right:16px;bottom:9px;flex-wrap:wrap;justify-content:center}.transport{padding:12px 16px;gap:8px;grid-template-columns:1fr auto}#time{grid-column:2;grid-row:2}#timeline{grid-column:1;grid-row:2}.speed{justify-self:end}.tools{gap:5px}.readouts{padding:14px 16px;gap:15px}.charts{padding:8px 16px;grid-template-columns:1fr;gap:18px}.plot:last-child{grid-column:auto}.plot canvas{height:220px}.balance{padding:8px 16px 16px}footer{padding:14px 16px}.equation{max-width:138px}.readouts strong{font-size:16px}}
@media(max-width:700px){header{display:block}.equation{padding-top:7px;max-width:none}.workspace{display:contents}.scene-heading{order:0}#scene{order:1}.transport{order:2}aside{order:3}.readouts{order:4}.charts{order:5}.balance{order:6}#error{order:7}}