:root{--ink:#1d2433;--muted:#566074;--line:#d9dee8;--bg:#fbfbf8;--accent:#1f4e79}
@media (prefers-color-scheme:dark){:root{--ink:#e8ebf2;--muted:#a7b0c2;--line:#2c3446;--bg:#12161f;--accent:#8fb8e8}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.65 Georgia,"Times New Roman",serif}
header,main,footer{max-width:720px;margin:0 auto;padding:0 20px}
header{padding-top:28px;padding-bottom:14px;border-bottom:1px solid var(--line);display:flex;flex-wrap:wrap;gap:8px 24px;align-items:baseline;justify-content:space-between}
header a.brand{font:600 20px/1.2 system-ui,Segoe UI,Arial,sans-serif;color:var(--ink);text-decoration:none}
nav a{font:15px system-ui,Segoe UI,Arial,sans-serif;color:var(--accent);margin-right:16px}
main{padding-top:28px;padding-bottom:40px}
h1{font:600 30px/1.25 system-ui,Segoe UI,Arial,sans-serif;margin:0 0 6px}
h2{font:600 20px/1.3 system-ui,Segoe UI,Arial,sans-serif;margin:32px 0 8px}
p,li{max-width:68ch}
.meta{color:var(--muted);font:15px system-ui,Segoe UI,Arial,sans-serif;margin-bottom:24px}
a{color:var(--accent)}
footer{padding-top:18px;padding-bottom:36px;border-top:1px solid var(--line);color:var(--muted);font:14px/1.5 system-ui,Segoe UI,Arial,sans-serif}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}