:root{--bg:#ffffff;--fg:#1a1d21;--muted:#5b6470;--line:#e4e7eb;--accent:#3b6ea5;--card:#f7f8fa}
@media (prefers-color-scheme:dark){:root{--bg:#14171a;--fg:#e8eaed;--muted:#9aa4b0;--line:#2a2f36;--accent:#7aa9d8;--card:#1b1f24}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);
  font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
.wrap{max-width:44rem;margin:0 auto;padding:3rem 1.25rem 4rem}
header{border-bottom:1px solid var(--line);padding-bottom:1.25rem;margin-bottom:2rem}
h1{font-size:1.6rem;margin:0 0 .35rem;letter-spacing:-.01em}
h2{font-size:1.1rem;margin:2rem 0 .6rem;letter-spacing:-.005em}
.sub{color:var(--muted);margin:0;font-size:.95rem}
p,li{color:var(--fg)}
ul{padding-left:1.15rem}
li{margin:.3rem 0}
a{color:var(--accent)}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:1rem 1.15rem;margin:1.5rem 0}
footer{margin-top:3rem;padding-top:1.25rem;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}
footer a{margin-right:1rem}
.date{color:var(--muted);font-size:.9rem}