:root{--bg:#f4f5f7;--surface:#fff;--text:#1c2330;--muted:#5f6b7a;--line:#c9d0da;--line-strong:#1c2330;--accent:#2459d6;--accent-text:#fff;--given:#1c2330;--user:#2459d6;--cell:#fff;--peer:#e9eef8;--same:#bcd0f6;--selected:#a9c2f5;--recent:#fff3bf;--conflict:#c62828;--conflict-bg:#fde3e3;--pattern:#d7f0dc;--target:#8fd69c;--elimination:#ffe0c2;--remove:#c62828;--place:#1b7a34;--focus:#e07b00;--chain:#6a35c2;--color-a:#2459d6;--color-b:#e07b00;--level-very-easy:#0e8a7d;--level-easy:#2f8f3e;--level-medium:#c27c0e;--level-hard:#d1492b;--level-extreme:#7d3cc8;--trophy:#b7860b;--radius:8px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}@media 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;--lightningcss-dark:initial;color-scheme:dark}}:root[data-theme=dark]{--bg:#12151b;--surface:#1b2029;--text:#e6e9ef;--muted:#9aa5b5;--line:#3a4352;--line-strong:#cfd6e2;--accent:#7aa2ff;--accent-text:#0e1420;--given:#e6e9ef;--user:#8fb1ff;--cell:#1b2029;--peer:#232a37;--same:#34497a;--selected:#3c5594;--recent:#4a4320;--conflict:#ff8a80;--conflict-bg:#4a2224;--pattern:#1f3d2a;--target:#2f6b3f;--elimination:#4d3520;--remove:#ff8a80;--place:#86e39a;--focus:#ffb347;--chain:#c49bff;--color-a:#7aa2ff;--color-b:#ffb347;--level-very-easy:#4fd1c5;--level-easy:#7bd88f;--level-medium:#f6c35b;--level-hard:#ff8f6b;--level-extreme:#c49bff;--trophy:#f2c94c;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.45}button,select,textarea{font:inherit;color:inherit}:focus-visible{outline:3px solid 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mistake-bump{0%,to{transform:translate(0)scale(1)}20%{transform:translate(-3px)scale(1.25)}45%{transform:translate(3px)scale(1.25)}70%{transform:translate(-2px)scale(1.1)}}.visually-hidden{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.icon-btn{cursor:pointer;background:0 0;border:0;border-radius:12px;place-items:center;width:44px;height:44px;padding:0;display:inline-grid}.icon-btn:hover,.icon-btn[aria-expanded=true]{background:var(--peer)}.menu-wrap{display:flex;position:relative}.menu{z-index:10;border:1px solid var(--line);background:var(--surface);border-radius:12px;min-width:210px;padding:6px;display:grid;position:absolute;top:calc(100% + 6px);right:0;box-shadow:0 12px 32px #0003}.menu-item{text-align:left;cursor:pointer;background:0 0;border:0;border-radius:8px;padding:10px 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.pad-key{border-style:dashed;border-color:var(--accent)}.pad-key.focused{border-color:var(--accent);box-shadow:inset 0 0 0 2px var(--accent)}.pad-tools{grid-template-columns:repeat(5,minmax(0,1fr));gap:4px;display:grid}.tool{border-radius:var(--radius);cursor:pointer;background:0 0;border:0;justify-items:center;gap:2px;min-width:0;padding:6px 2px;font-size:.8rem;display:grid;position:relative}.tool:hover:not(:disabled){background:var(--peer)}.tool:disabled{opacity:.4;cursor:not-allowed}.tool.active{color:var(--accent)}.tool-state{background:var(--line);color:var(--text);border-radius:999px;padding:0 5px;font-size:.65rem;font-weight:700;line-height:1.5;position:absolute;top:2px;left:calc(50% + 8px)}.tool.active .tool-state{background:var(--accent);color:var(--accent-text)}.panel{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);padding:12px 16px}.panel summary{cursor:pointer;font-weight:700}.panel h3{margin:12px 0 4px;font-size:1rem}.panel p{margin:8px 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