:root{--bg:#fbfaf7;--fg:#1d1f22;--muted:#5b6068;--line:#dcd8cf;--accent:#b4540a;--card:#ffffff;--code:#f0ede6}
@media (prefers-color-scheme:dark){:root{--bg:#15171a;--fg:#e8e6e1;--muted:#a3a7ad;--line:#33373d;--accent:#f0a052;--card:#1d2024;--code:#262a2f}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
a{color:var(--accent)}a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.skip{position:absolute;left:-9999px}.skip:focus{left:16px;top:8px;background:var(--card);padding:8px;z-index:9}
header,main,footer{max-width:820px;margin:0 auto;padding:0 16px}
header{display:flex;flex-wrap:wrap;gap:8px 16px;align-items:center;justify-content:space-between;padding-top:16px;padding-bottom:12px;border-bottom:1px solid var(--line)}
header .brand{font-weight:700;text-decoration:none;color:var(--fg)}
nav ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:4px 14px;font-size:15px}
h1{font-size:1.75rem;line-height:1.25;margin:28px 0 12px}h2{font-size:1.25rem;margin:32px 0 8px;padding-top:8px;border-top:1px solid var(--line)}
h3{font-size:1.05rem;margin:20px 0 6px}
code{background:var(--code);padding:1px 5px;border-radius:4px;font-size:.92em}
.lang{font-size:15px;color:var(--muted)}
.toc{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:10px 16px;margin:16px 0}.toc ol{margin:6px 0;padding-left:22px}
.table{overflow-x:auto;margin:12px 0}table{border-collapse:collapse;width:100%;font-size:15px;background:var(--card)}
th,td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}thead th{background:var(--code)}
@media (max-width:640px){thead{position:absolute;left:-9999px}table,tbody,tr,th,td{display:block;width:100%}
tr{border:1px solid var(--line);border-radius:8px;margin:0 0 12px;overflow:hidden}th[scope=row]{background:var(--code);border:0}
td{border:0;border-top:1px solid var(--line)}td::before{content:attr(data-label);display:block;font-weight:600;color:var(--muted);font-size:13px}}
.card{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:12px 16px;margin:14px 0}
footer{margin-top:40px;padding-top:16px;padding-bottom:32px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}