:root{--bg:#fafaf9;--fg:#1c1917;--muted:#57534e;--accent:#0f766e;--line:#e7e5e4}
@media (prefers-color-scheme:dark){:root{--bg:#121212;--fg:#f5f5f4;--muted:#a8a29e;--accent:#2dd4bf;--line:#2e2e2e}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
main{max-width:760px;margin:0 auto;padding:48px 16px}
header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:32px}
header a.brand{font-weight:700;font-size:1.2rem;color:var(--fg);text-decoration:none}
nav a{margin-left:16px;color:var(--muted);text-decoration:none}
nav a:hover,a{color:var(--accent)}
h1{font-size:2rem;line-height:1.2;margin:0 0 16px}
h2{font-size:1.2rem;margin-top:32px}
p.lead{font-size:1.15rem;color:var(--muted)}
footer{margin-top:48px;padding-top:16px;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}