:root{--bg:#fbfbfa;--fg:#1d2127;--muted:#5c6673;--line:#e3e5e8;--accent:#1f7a5a}
*{box-sizing:border-box}
body{margin:0;font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--fg)}
header{border-bottom:1px solid var(--line);background:#fff}
.wrap{max-width:860px;margin:0 auto;padding:0 20px}
nav{display:flex;align-items:center;gap:22px;height:62px}
nav .brand{font-weight:600;letter-spacing:-.2px;margin-right:auto}
nav a{color:var(--muted);text-decoration:none;font-size:15px}
nav a:hover,nav a.on{color:var(--accent)}
h1{font-size:30px;line-height:1.25;margin:34px 0 10px;letter-spacing:-.4px}
h2{font-size:20px;margin:30px 0 8px}
p{margin:12px 0}
.lead{font-size:18px;color:var(--muted)}
code,pre{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px}
pre{background:#fff;border:1px solid var(--line);border-radius:8px;padding:14px;overflow:auto}
code{background:#f0f1f2;padding:2px 5px;border-radius:4px}
table{border-collapse:collapse;width:100%;margin:16px 0;font-size:15px}
th,td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line)}
th{color:var(--muted);font-weight:600}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin:22px 0}
.card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px}
.card h3{margin:0 0 6px;font-size:16px}
.card p{margin:0;color:var(--muted);font-size:15px}
.ok{color:var(--accent);font-weight:600}
footer{border-top:1px solid var(--line);margin-top:48px;padding:22px 0;color:var(--muted);font-size:14px}
@media (max-width:600px){h1{font-size:25px}nav{gap:14px}}