:root{--bg:#f7fafb;--card:#fff;--ink:#0f172a;--muted:#5b6b7a;--line:#e2e8f0;--accent:#0e7490}
@media (prefers-color-scheme:dark){:root{--bg:#0b1117;--card:#111a22;--ink:#e6edf3;--muted:#93a4b5;--line:#1f2c38;--accent:#5eead4}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
header{border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;justify-content:space-between;padding-top:18px;padding-bottom:18px}
.brand{font-weight:800;font-size:20px;color:var(--ink);text-decoration:none;letter-spacing:-.02em}
.brand{display:inline-flex;align-items:center}
.brand img{height:30px;width:auto;display:block}
nav a{color:var(--muted);text-decoration:none;margin-left:16px;font-size:14px}
nav a:hover,nav a[aria-current]{color:var(--accent)}
.wrap{max-width:760px;margin:0 auto;padding:0 20px}
main{padding:40px 0 64px}
h1{font-size:32px;line-height:1.2;letter-spacing:-.02em;margin:0 0 6px}
.meta{color:var(--muted);font-size:14px;margin:0 0 28px}
h2{font-size:20px;margin:36px 0 8px}
a{color:var(--accent)}
ul{padding-left:22px}
li{margin:4px 0}
.box{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin:20px 0}
table{width:100%;border-collapse:collapse;font-size:15px}
th,td{text-align:left;padding:10px 8px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--muted);font-weight:600}
footer{border-top:1px solid var(--line);color:var(--muted);font-size:14px;padding:24px 0}
@media (max-width:520px){h1{font-size:26px}nav a{margin-left:10px}}