:root{--bg:#fff;--fg:#0f172a;--muted:#5b6472;--border:#e5e8ee;--card:#f8fafc;--accent:#1877f2;--accent-fg:#fff;--maxw:900px}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--fg);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif,Apple Color Emoji,Segoe UI Emoji;line-height:1.6}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}.site-header,.site-footer{border-bottom:1px solid var(--border)}.site-footer{border-bottom:none;border-top:1px solid var(--border);color:var(--muted);margin-top:64px;font-size:14px}.site-header .inner,.site-footer .inner{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;padding:16px 0;display:flex}.brand{color:var(--fg);font-size:18px;font-weight:700}.nav a{color:var(--muted);margin-left:18px;font-size:15px}main{padding:48px 0}h1{margin:0 0 16px;font-size:34px;line-height:1.2}h2{margin:32px 0 12px;font-size:22px}p{margin:0 0 14px}.lead{color:var(--muted);margin-bottom:28px;font-size:19px}.btn{background:var(--accent);color:var(--accent-fg);cursor:pointer;border:none;border-radius:8px;align-items:center;gap:8px;padding:12px 22px;font-size:16px;font-weight:600;display:inline-flex}.btn:hover{filter:brightness(.95);text-decoration:none}.card{background:var(--card);border:1px solid var(--border);border-radius:12px;margin:16px 0;padding:22px}.grid{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin:24px 0;display:grid}table{border-collapse:collapse;width:100%;font-size:14px}th,td{text-align:left;border-bottom:1px solid var(--border);padding:10px 12px}th{color:var(--muted);font-weight:600}.muted{color:var(--muted)}.prose h2{font-size:20px}.prose ul{margin:0 0 14px;padding-left:22px}@media (prefers-color-scheme:dark){:root{--bg:#0b1120;--fg:#e6e9ef;--muted:#97a1b2;--border:#1e2634;--card:#111827;--accent:#3b82f6}}