:root{--bg:#f6f7f6;--ink:#1a2129;--muted:#5a6573;--rule:#dde2e5;--accent:#2c47a3;color-scheme:light}
@media (prefers-color-scheme:dark){:root{--bg:#12171d;--ink:#e5e9ed;--muted:#9aa5b1;--rule:#2a333d;--accent:#8ea6ff;color-scheme:dark}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;padding:56px 20px 80px}
main{max-width:640px;margin:0 auto}
h1{font-size:1.9rem;line-height:1.2;margin:0 0 8px;letter-spacing:-.01em}
h2{font-size:1.1rem;margin:32px 0 6px}
p,li{margin:0 0 12px}
ul{padding-left:20px;margin:0 0 12px}
.meta{color:var(--muted);font-size:.9rem;margin-bottom:28px}
a{color:var(--accent)}
footer{margin-top:48px;padding-top:16px;border-top:1px solid var(--rule);color:var(--muted);font-size:.9rem}