:root{--bg:#f6f7f9;--surface:#ffffff;--ink:#1b1f24;--muted:#5b6470;--line:#dde1e6;--accent:#0b5cad;--accent-ink:#ffffff;--accent-soft:#e7f0fa;--ok:#1a7f37;--ok-soft:#e6f4ea;--warn:#8a5a00;--warn-soft:#fff4d6;--bad:#b42318;--bad-soft:#fde8e7;--info:#0b5cad;--info-soft:#e7f0fa;--demo:#6b3fa0;--demo-soft:#f1eafa;--radius:10px;color-scheme:light}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#0f1216;--surface:#171b21;--ink:#e8ebef;--muted:#9aa4b1;--line:#2a3038;--accent:#5aa2f0;--accent-ink:#0b1220;--accent-soft:#15263a;--ok:#4cc26a;--ok-soft:#12291a;--warn:#e0b04a;--warn-soft:#2e2510;--bad:#f07a6f;--bad-soft:#341614;--info:#5aa2f0;--info-soft:#15263a;--demo:#c4a0f0;--demo-soft:#261b36;color-scheme:dark}}*{box-sizing:border-box}body,html{margin:0}body{background:var(--bg);color:var(--ink);font:15px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}a{color:var(--accent)}h1{font-size:1.6rem;margin:0 0 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