:root{color-scheme:light;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;--bg: #eef2ef;--ink: #20251f;--muted: #667066;--panel: #fbfcf8;--panel-border: #d5ddd2;--accent: #256b5f;--accent-strong: #154b43;--red: #b9232f;--black: #202327;--board: #d7a45f;--board-dark: #c8924d;--board-line: #6b3e1f;--warn: #b66b10;--error: #b42318;--shadow: 0 18px 45px rgb(34 40 31 / .14)}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;color:var(--ink);background:linear-gradient(135deg,rgb(37 107 95 / .12),transparent 36%),linear-gradient(315deg,rgb(185 35 47 / .1),transparent 38%),var(--bg)}button,input{font:inherit}button{display:inline-flex;min-height:40px;align-items:center;justify-content:center;gap:8px;border:1px solid var(--panel-border);border-radius:8px;color:var(--ink);background:#fff;cursor:pointer;transition:transform .12s ease,border-color .12s ease,background .12s ease}button:hover:not(:disabled){transform:translateY(-1px);border-color:var(--accent)}button:disabled{cursor:not-allowed;opacity:.45}input{width:100%;min-height:40px;border:1px solid var(--panel-border);border-radius:8px;padding:0 11px;color:var(--ink);background:#fff}input:focus,button:focus-visible{outline:3px solid rgb(37 107 95 / .24);outline-offset:2px}h1,h2,p{margin:0}.app-shell{display:grid;grid-template-columns:minmax(460px,1fr) minmax(350px,420px);gap:22px;width:min(1440px,100%);min-height:100vh;margin:0 auto;padding:22px}.play-area{display:flex;min-width:0;flex-direction:column;justify-content:start;gap:18px;padding-top:clamp(16px,5vh,86px)}.board-header{display:flex;align-items:end;justify-content:space-between;gap:16px}.eyebrow{color:var(--accent);font-size:.78rem;font-weight:750;letter-spacing:0;text-transform:uppercase}h1{margin-top:4px;font-size:clamp(1.65rem,3rem,3.25rem);line-height:1}h2{font-size:.98rem;line-height:1.2}.turn-strip{display:flex;min-width:150px;align-items:center;justify-content:space-between;gap:10px;border:1px solid var(--panel-border);border-radius:8px;padding:10px 12px;color:var(--accent-strong);background:#fbfcf8c7;box-shadow:var(--shadow)}.turn-strip span{color:var(--muted);font-size:.86rem}.board-shell{position:relative;width:min(100%,650px,calc((100vh - 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