:root{--bg:#0C0E10;--card:#15181B;--text:#E9EDF0;--mute:#9AA3AB;--line:#262B30;--cyan:#38D6E8}
@media (prefers-color-scheme: light){:root{--bg:#F6F7F8;--card:#fff;--text:#14181C;--mute:#5B646C;--line:#DCE2E8;--cyan:#007C8C}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
main{max-width:720px;margin:0 auto;padding:32px 16px 64px}h1{font-size:1.9rem;line-height:1.2;margin:0 0 6px}h2{font-size:1.15rem;margin:32px 0 6px}h3{font-size:1rem;margin:20px 0 4px}
p,li{color:var(--text)}.mute{color:var(--mute);font-size:.9rem}a{color:var(--cyan)}hr{border:0;border-top:1px solid var(--line);margin:40px 0}
.back{display:inline-block;margin-bottom:20px;font-weight:600;text-decoration:none}.todo{background:#5a3a00;color:#ffd27a;padding:0 4px;border-radius:4px}