:root{--bg:#f7f6f2;--fg:#1d2420;--muted:#5b6660;--card:#fff;--line:#e3e1da;--brand:#1f5fbf}
@media (prefers-color-scheme:dark){:root{--bg:#141816;--fg:#ecefe9;--muted:#a7b0aa;--card:#1d2320;--line:#2e3632}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
header,main,footer{max-width:760px;margin:0 auto;padding:0 18px}
header{display:flex;align-items:center;justify-content:space-between;padding-top:18px;padding-bottom:6px;gap:12px}
.logo{font-weight:800;font-size:20px;color:var(--brand);text-decoration:none;letter-spacing:-.01em}
nav a{color:var(--muted);text-decoration:none;margin-left:14px;font-size:15px}nav a[aria-current]{color:var(--fg);font-weight:600}
h1{font-size:28px;line-height:1.2;margin:18px 0 6px}h2{font-size:19px;margin:26px 0 6px}
p,li{color:var(--fg)}.muted{color:var(--muted)}.lead{font-size:18px;color:var(--muted)}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px 18px;margin:16px 0}
ul{padding-left:20px}li{margin:4px 0}a{color:var(--brand)}
.links a{display:block;padding:12px 0;border-top:1px solid var(--line);text-decoration:none;font-weight:600}
.links a:first-child{border-top:0}
footer{padding-top:24px;padding-bottom:30px;font-size:14px;color:var(--muted)}