:root{--bg: #f4efe6;--ink: #1c1914;--muted: #6b6458;--paper: #fffaf3;--line: #c9bfb0;--thick: #2c261e;--accent: #c45c26;--accent-soft: #f3d5c0;--sel: #e8d5a8;--peer: #efe6d4;--same: #d7e4c7;--bad: #e8b4b4;--wrong: #f0c9c4;--given: #1c1914;--fill: #3d5a80;--note: #6b6458;--shadow: 0 18px 40px rgba(44, 38, 30, .12);color-scheme:light}[data-theme=dark]{--bg: #161410;--ink: #f3ece2;--muted: #a39888;--paper: #221e18;--line: #3d372e;--thick: #e8dfd2;--accent: #e07a3d;--accent-soft: #3a2a22;--sel: #3a3428;--peer: #2a261f;--same: #2d3a28;--bad: #5a2e2e;--wrong: #4a2a28;--given: #f3ece2;--fill: #9ec1e0;--note: #b7ae9f;--shadow: 0 18px 40px rgba(0, 0, 0, .35);color-scheme:dark}*{box-sizing:border-box}html,body{margin:0;min-height:100%}body{font-family:IBM Plex Sans,system-ui,sans-serif;background:radial-gradient(1200px 600px at 10% -10%,var(--accent-soft),transparent 55%),var(--bg);color:var(--ink)}.app{max-width:720px;margin:0 auto;padding:1.25rem 1rem 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