:root{
  --bg:#ffffff; --panel:#f6f7f9; --text:#16181d; --muted:#5b6472;
  --accent:#1f6feb; --line:#e3e6ea;
}
@media (prefers-color-scheme: dark){
  :root{ --bg:#0e1013; --panel:#171a1f; --text:#e9ecf1; --muted:#9aa4b2;
         --accent:#66a3ff; --line:#252a31; }
}
*{box-sizing:border-box}
body{
  margin:0; background:var(--bg); color:var(--text);
  font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-text-size-adjust:100%;
}
.wrap{max-width:760px;margin:0 auto;padding:32px 20px 80px}
header.site{display:flex;gap:12px;align-items:center;justify-content:space-between;
  flex-wrap:wrap;padding:18px 0;border-bottom:1px solid var(--line);margin-bottom:32px}
header.site a.brand{font-weight:650;color:var(--text);text-decoration:none;font-size:17px}
header.site nav{display:flex;gap:18px;flex-wrap:wrap}
header.site nav a{color:var(--muted);text-decoration:none;font-size:14px}
header.site nav a:hover{color:var(--accent)}
h1{font-size:28px;line-height:1.25;margin:0 0 6px;letter-spacing:-.01em}
h2{font-size:19px;margin:34px 0 10px;letter-spacing:-.005em}
h3{font-size:16px;margin:22px 0 6px}
p,li{color:var(--text)}
.lede{color:var(--muted);margin:0 0 28px}
a{color:var(--accent)}
ul{padding-left:22px}
li{margin:6px 0}
.box{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin:22px 0}
.box strong{display:block;margin-bottom:4px}
table{width:100%;border-collapse:collapse;margin:14px 0;font-size:15px}
th,td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--muted);font-weight:600}
footer.site{margin-top:56px;padding-top:20px;border-top:1px solid var(--line);
  color:var(--muted);font-size:13px;display:flex;gap:16px;flex-wrap:wrap;justify-content:space-between}
footer.site a{color:var(--muted)}
.btn{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;
  padding:11px 20px;border-radius:10px;font-weight:600;font-size:15px;margin-top:8px}