:root{--bg:#f9fafb;--fg:#000033;--muted:#5c5c70;--card:#fff;--line:#e5e7eb;--brand:#000066;--gold:#ffbf00;--link:#000066;--todo:#fff4d6;--todofg:#7a5b00}
@media (prefers-color-scheme:dark){:root{--bg:#00001f;--fg:#f2f2ff;--muted:#a3a3c2;--card:#0d0d26;--line:#20203c;--link:#ffbf00;--todo:#2a2200;--todofg:#ffd75e}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
header{background:var(--brand);color:#fff;padding:18px 20px}header a{color:#fff;text-decoration:none;font-weight:800;letter-spacing:.14em}
header small{display:block;color:#c7c7ea;font-size:11px;letter-spacing:.18em;margin-top:2px;font-weight:600}
main{max-width:760px;margin:0 auto;padding:28px 20px 56px}h1{font-size:28px;line-height:1.25;margin:0 0 4px}h2{font-size:19px;margin:32px 0 6px}
.meta{color:var(--muted);font-size:14px;margin-bottom:20px}p,li{margin:8px 0}ul{padding-left:22px}a{color:var(--link)}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:6px 18px;margin:16px 0}
mark.todo{background:var(--todo);color:var(--todofg);padding:0 4px;border-radius:4px}
nav.f{border-top:1px solid var(--line);margin-top:40px;padding-top:16px;font-size:14px;display:flex;flex-wrap:wrap;gap:6px 18px}
.note{border-left:4px solid var(--gold);background:var(--card);padding:6px 14px;margin:16px 0}