:root{--bg:#ECEEF1;--surface:#fff;--ink:#14171C;--muted:#5D6573;--line:#D3D8DF;--accent:#D3263C;--link:#2452CF}
@media (prefers-color-scheme:dark){:root{--bg:#0E1115;--surface:#171B21;--ink:#EDF0F4;--muted:#8C95A3;--line:#2A3039;--accent:#F0475B;--link:#6C8EF5}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
main{max-width:680px;margin:0 auto;padding:28px 16px 64px}
.brand{font:900 34px/1 "Avenir Next Condensed","Arial Narrow",sans-serif;letter-spacing:-.5px;text-decoration:none;color:var(--ink)}.brand b{color:var(--accent)}
nav{display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap;margin-bottom:28px}nav a{color:var(--link);font-weight:600;text-decoration:none;font-size:15px}
h1{font:800 34px/1.15 "Avenir Next Condensed","Arial Narrow",sans-serif;margin:0 0 6px}
h2{font-size:19px;margin:30px 0 6px}
p,li{color:var(--ink)}.muted{color:var(--muted);font-size:14px}
a{color:var(--link)}
.card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:18px 20px;margin:16px 0}
.card h2{margin-top:0}
ul{padding-left:20px}
footer{margin-top:40px;color:var(--muted);font-size:13px}