:root{--bg:#f4f5f7;--panel:#fff;--text:#1d2330;--muted:#6b7280;--border:#dfe2e8;--accent:#3b5bdb;--accent-text:#fff;--right:#2f9e44;--wrong:#e03131;--soft:#eef1f8;--radius:10px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;color:var(--text);background:var(--bg);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}@media (prefers-color-scheme:dark){:root{--bg:#14161b;--panel:#1d2027;--text:#e6e8ec;--muted:#9aa1ad;--border:#2e333d;--accent:#5c7cfa;--right:#40c057;--wrong:#ff6b6b;--soft:#252a34;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}}*{box-sizing:border-box}body{background:var(--bg);margin:0;line-height:1.45}h1{margin:0 0 .5rem;font-size:1.6rem}h2{margin:1.5rem 0 .75rem;font-size:1.15rem}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:960px;margin:0 auto;padding:1.25rem 1rem 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