:root{color-scheme:light;--ink:#283047;--muted:#657087;--accent:#6544b6;--line:#dfe3ed}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:#f3f4f9;font:16px/1.6 system-ui,sans-serif}header,main,footer{max-width:1240px;margin:auto;padding:24px}header{display:flex;justify-content:space-between;align-items:center;gap:14px}header strong{font-size:14px;letter-spacing:.1em}.hero{max-width:800px;margin:8px 0 30px}.eyebrow{color:var(--accent);font-weight:700}h1{font-size:clamp(31px,5vw,48px);letter-spacing:-.04em;line-height:1.2;margin:12px 0}h2{font-size:21px;margin:0 0 16px}p{margin:10px 0 18px}.muted,small{color:var(--muted)}.layout{display:grid;grid-template-columns:minmax(290px,.8fr) minmax(0,1.2fr);gap:22px;align-items:start}.panel{border:1px solid var(--line);background:#fff;padding:26px;border-radius:18px;box-shadow:0 10px 32px #333c6004}.sticky{position:sticky;top:20px}label{display:block;font-weight:650;margin:14px 0 6px}input,textarea,select,button{font:inherit;color:inherit}input,select,textarea{border:1px solid #b8c1d5;border-radius:8px;padding:10px;background:#fcfcff;width:100%}textarea{height:230px;resize:vertical;font:15px/1.65 ui-monospace,monospace}header select{width:auto}button{border:1px solid var(--line);background:white;border-radius:8px;padding:10px 15px;cursor:pointer}button.primary{background:var(--accent);border-color:var(--accent);color:white;width:100%;margin:18px 0 12px}button:focus-visible,input:focus,textarea:focus,select:focus,a:focus-visible{outline:3px solid #b3a2e1;outline-offset:2px}.row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.examples,.actions{display:flex;flex-wrap:wrap;gap:8px}.examples button{font-size:13px;padding:7px 10px}.error{min-height:26px;color:#a22440;font-size:14px}.status{color:var(--accent);font-size:14px}.metrics{display:grid;grid-template-columns:1fr 1fr;gap:12px}.metric{background:#f4f1fa;padding:14px;border-radius:10px;min-width:0}.metric b{display:block;font-size:24px;overflow-wrap:anywhere;line-height:1.3}.metric span{font-size:13px}.metric small{display:block}.formula{font:19px/1.5 ui-monospace,monospace;overflow-wrap:anywhere;background:#252c43;color:#e7e0ff;padding:18px;border-radius:10px}canvas{display:block;width:100%;height:380px;border:1px solid var(--line);border-radius:10px;margin:10px 0;background:#fff}.residual-canvas{height:260px}.wide{margin-top:24px}.table-wrap{overflow:auto;max-height:360px;border:1px solid var(--line);border-radius:10px}table{width:100%;border-collapse:collapse;font-size:14px;font-variant-numeric:tabular-nums;text-align:right}td,th{padding:9px 12px;border-bottom:1px solid var(--line);white-space:nowrap}th{position:sticky;top:0;background:#f0edf7}details summary{cursor:pointer;font-weight:700}footer{display:flex;justify-content:space-between;gap:16px;font-size:13px}footer a{color:#777d88}.prediction{padding:15px;background:#f5f3fa;border-radius:10px}.prediction button{margin-top:10px}#prediction{font-weight:650;overflow-wrap:anywhere}@media(max-width:850px){.layout{grid-template-columns:1fr}.sticky{position:static}header,main,footer{padding:18px}.panel{padding:20px}.hero{margin-bottom:22px}canvas{height:320px}.residual-canvas{height:240px}.metric b{font-size:22px}footer{flex-direction:column;gap:5px}}