:root{--bg:#fff;--fg:#0a0a0a;--muted:#6b7280;--border:#e5e7eb;--primary:#29a36f;--card:#f9fafb}
@media (prefers-color-scheme:dark){:root{--bg:#0a0a0a;--fg:#fafafa;--muted:#9ca3af;--border:#27272a;--card:#141414}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}
main{max-width:720px;margin:0 auto;padding:48px 16px 64px}
header{display:flex;align-items:center;justify-content:space-between;max-width:720px;margin:0 auto;padding:20px 16px;border-bottom:1px solid var(--border)}
header a{color:var(--fg);text-decoration:none;font-weight:600}
header nav a{font-weight:500;color:var(--muted);margin-left:20px;font-size:14px}
h1{font-size:32px;line-height:1.2;margin:0 0 12px}
h2{font-size:20px;margin:36px 0 8px}
p,li{color:var(--fg)}
.lead{font-size:18px;color:var(--muted)}
.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:20px 24px;margin:24px 0}
.btn{display:inline-block;background:var(--primary);color:#fff;padding:10px 18px;border-radius:8px;text-decoration:none;font-weight:600;font-size:14px}
.btn.secondary{background:transparent;color:var(--fg);border:1px solid var(--border)}
footer{max-width:720px;margin:0 auto;padding:24px 16px;border-top:1px solid var(--border);color:var(--muted);font-size:13px}
footer a{color:var(--muted)}
small{color:var(--muted)}