:root{--bg:#ffffff;--fg:#16181d;--muted:#5b6170;--rule:#e4e6eb;--link:#1f5fbf}
@media (prefers-color-scheme:dark){:root{--bg:#0f1115;--fg:#e8eaf0;--muted:#9aa1ae;--rule:#262a33;--link:#8ab4ff}}
*{box-sizing:border-box}
html{background:var(--bg);color:var(--fg);font:17px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif}
body{margin:0;min-height:100vh;display:flex;flex-direction:column}
main{flex:1;width:100%;max-width:44rem;margin:0 auto;padding:5rem 1.25rem 3rem}
h1{font-size:2rem;line-height:1.2;margin:0 0 .75rem;letter-spacing:-.01em}
h2{font-size:1.15rem;margin:2rem 0 .5rem}
p,li{color:var(--fg)}
.lede{font-size:1.15rem;color:var(--muted);margin:0 0 2.5rem}
a{color:var(--link)}
footer{border-top:1px solid var(--rule);color:var(--muted);font-size:.9rem}
footer div{max-width:44rem;margin:0 auto;padding:1.25rem;display:flex;flex-wrap:wrap;gap:.25rem 1.25rem;justify-content:space-between}
footer nav{display:flex;gap:1.25rem}
.back{display:inline-block;margin-bottom:2rem;font-size:.95rem}