:root{
  --bg:#f6f7f9;--card:#fff;--text:#1d2430;--muted:#5f6b7a;--line:#e3e7ec;
  --accent:#1f6feb;--ok:#1a7f37;--code:#f0f2f5;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#0f1318;--card:#171c23;--text:#e6ebf1;--muted:#97a3b3;--line:#262d37;
  --accent:#58a6ff;--ok:#3fb950;--code:#1f252e}
}
*{box-sizing:border-box}
html{font-size:16px}
body{margin:0;background:var(--bg);color:var(--text);
  font:15px/1.6 -apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}
header{background:var(--card);border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:60px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;color:var(--text)}
.brand img{width:26px;height:26px}
nav a{margin-left:20px;color:var(--muted);font-size:14px}
nav a.active,nav a:hover{color:var(--text);text-decoration:none}
main{padding:32px 0 48px}
h1{font-size:26px;margin:0 0 6px}
h2{font-size:18px;margin:32px 0 12px}
.lead{color:var(--muted);margin:0 0 24px}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:20px 22px}
.clock{display:grid;grid-template-columns:1fr auto;gap:20px;align-items:center}
.time{font:600 44px/1.1 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;letter-spacing:1px}
.date{color:var(--muted);margin-top:4px}
.status{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--ok);font-weight:500}
.status::before{content:"";width:9px;height:9px;border-radius:50%;background:var(--ok)}
.offset{font-size:13px;color:var(--muted);text-align:right;margin-top:6px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;margin-top:14px}
.kv{font-size:13px;color:var(--muted)}
.kv b{display:block;font-size:17px;color:var(--text);font-weight:600;margin-top:2px}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line)}
th{color:var(--muted);font-weight:500;font-size:13px}
td code,p code,li code{background:var(--code);padding:1px 6px;border-radius:4px;font-size:13px}
pre{background:var(--code);border-radius:8px;padding:14px 16px;overflow-x:auto;font-size:13px;line-height:1.5;margin:8px 0 18px}
.note{border-left:3px solid var(--accent);padding:4px 0 4px 14px;color:var(--muted);font-size:14px}
footer{border-top:1px solid var(--line);color:var(--muted);font-size:13px;padding:20px 0 30px}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
@media (max-width:600px){
  .time{font-size:32px}.clock{grid-template-columns:1fr}.offset{text-align:left}
  nav a{margin-left:12px}
}