:root{--bg:#ffffff;--fg:#1f2328;--muted:#59636e;--line:#d8dee4;--accent:#0b5cad;--soft:#f6f8fa}
*{box-sizing:border-box}
html{font-size:16px}
body{margin:0;background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;line-height:1.6}
header{border-bottom:1px solid var(--line);background:var(--soft)}
.wrap{max-width:820px;margin:0 auto;padding:0 20px}
header .wrap{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;padding-top:16px;padding-bottom:16px}
.brand{font-weight:700;font-size:1.1rem;color:var(--fg);text-decoration:none;letter-spacing:.2px}
nav a{color:var(--muted);text-decoration:none;margin-left:18px;font-size:.95rem}
nav a:hover,nav a[aria-current]{color:var(--accent)}
main{padding:40px 0 60px}
h1{font-size:2rem;margin:0 0 6px}
h2{font-size:1.3rem;margin:32px 0 8px}
h3{font-size:1.05rem;margin:22px 0 6px}
p,li{font-size:1rem}
.meta{color:var(--muted);margin:0 0 24px;font-size:.95rem}
a{color:var(--accent)}
table{border-collapse:collapse;width:100%;margin:12px 0 20px}
td,th{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
th{background:var(--soft);width:34%;font-weight:600}
footer{border-top:1px solid var(--line);padding:24px 0;color:var(--muted);font-size:.9rem}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
footer a{color:var(--muted);margin-right:14px}
.card{border:1px solid var(--line);border-radius:8px;padding:18px 20px;margin:18px 0;background:var(--soft)}
@media (max-width:600px){h1{font-size:1.6rem} nav a{margin-left:12px}}