:root{--bg:#fbfaf7;--fg:#1c2430;--muted:#5b6574;--accent:#1f5f8b;--rule:#e3e0d8}
@media (prefers-color-scheme:dark){:root{--bg:#11161d;--fg:#e8ebef;--muted:#a3adba;--accent:#7cb7e0;--rule:#2a3340}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
main{max-width:42rem;margin:0 auto;padding:3rem 1rem 4rem}
header{margin-bottom:2.5rem}
.brand{font-weight:700;font-size:1.35rem;letter-spacing:.01em;color:var(--fg);text-decoration:none}
h1{font-size:2rem;line-height:1.2;margin:.2rem 0 1rem}
h2{font-size:1.2rem;margin:2.2rem 0 .6rem}
p,li{color:var(--fg)}
.lede{font-size:1.2rem;color:var(--muted)}
a{color:var(--accent)}
ul{padding-left:1.2rem}
footer{margin-top:3.5rem;padding-top:1.2rem;border-top:1px solid var(--rule);color:var(--muted);font-size:.9rem}
footer a{color:var(--muted)}