:root{--bg:#161B23;--fg:#e7e9ee;--mut:#8a93a3;--acc:#7aa2ff;--card:#1d2430;--line:#2a3242;--mono:"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;color-scheme:dark}
@media (prefers-color-scheme:light){:root{--bg:#f6f7f9;--fg:#1c2230;--mut:#5f6879;--acc:#2f5fd1;--card:#ffffff;--line:#dfe3ea;color-scheme:light}}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--fg);font:15px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,sans-serif}
a{color:var(--acc);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:860px;margin:0 auto;padding:40px 20px}
header{margin-bottom:32px}
.brand{font-weight:700;font-size:20px;letter-spacing:-.01em}
.tag{color:var(--mut);font-size:13px;margin-top:4px}
nav.toc{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0 8px}
nav.toc a{font-size:13px;padding:4px 10px;background:var(--card);border:1px solid var(--line);border-radius:999px;color:var(--fg)}
nav.toc a:hover{border-color:var(--acc);text-decoration:none}
section{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:18px 20px;margin:16px 0}
section h2{font-size:14px;letter-spacing:.04em;text-transform:uppercase;color:var(--acc);margin:0 0 4px;font-weight:600}
section .sub{color:var(--mut);font-size:13px;margin:0 0 14px}
table{width:100%;border-collapse:collapse;font:13px/1.5 var(--mono)}
th,td{text-align:left;padding:6px 10px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--mut);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.04em}
td.n{color:var(--acc)}
td.k{color:var(--mut)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media (max-width:640px){.grid2{grid-template-columns:1fr}}
footer{margin-top:48px;padding-top:18px;border-top:1px solid var(--line);color:var(--mut);font-size:12px;display:flex;gap:14px;flex-wrap:wrap}
footer .dot{color:var(--line)}
.brand a{color:var(--fg)}
.brand a:hover{text-decoration:none;color:var(--acc)}
nav.site{display:flex;gap:16px;margin-top:12px;font-size:13px}
nav.site a{color:var(--mut)}
nav.site a[aria-current]{color:var(--fg)}
nav.site a:hover{color:var(--acc);text-decoration:none}
.prose{max-width:620px}
.prose h1{font-size:22px;letter-spacing:-.01em;margin:0 0 16px}
.prose p{color:var(--fg)}
.prose p.mut{color:var(--mut)}
.log dt{font:13px var(--mono);color:var(--acc);margin-top:14px}
.log dd{margin:4px 0 0;color:var(--fg)}
.log dd.mut{color:var(--mut);font-size:13px}
footer a{color:var(--mut)}
.mono{font-family:var(--mono)}
.lead{color:var(--mut);max-width:620px}

section h2 .anchor{color:var(--line);font-weight:400;margin-left:6px;text-decoration:none}
section:hover h2 .anchor,section h2 .anchor:focus{color:var(--acc)}
section:target{border-color:var(--acc)}
@media print{
  :root{--bg:#fff;--fg:#000;--mut:#444;--acc:#000;--card:#fff;--line:#999}
  html,body{font-size:11px}
  .wrap{max-width:none;padding:0}
  nav.toc,nav.site,footer,.anchor{display:none}
  section{break-inside:avoid;border:0;border-top:1px solid #999;border-radius:0;padding:8px 0;margin:8px 0}
  a{color:#000;text-decoration:none}
  table{font-size:10px}
  th,td{padding:3px 6px}
}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
@media (max-width:640px){.grid4{grid-template-columns:1fr 1fr}}

/* mobile */
.scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:0 -4px;padding:0 4px}
.scroll table{min-width:100%}
th,td{white-space:nowrap}
td:last-child{white-space:normal}
.wrap{padding-left:max(20px,env(safe-area-inset-left));padding-right:max(20px,env(safe-area-inset-right))}
nav.toc a,nav.site a{display:inline-block;padding:6px 12px;line-height:1.3}
nav.site{gap:4px;margin-left:-12px}
@media (hover:none){section h2 .anchor{color:var(--mut)}}
@media (max-width:640px){
  .wrap{padding-top:20px;padding-bottom:20px;padding-left:max(14px,env(safe-area-inset-left));padding-right:max(14px,env(safe-area-inset-right))}
  header{margin-bottom:20px}
  nav.toc{gap:6px}
  nav.toc a{font-size:12px;padding:5px 10px}
  section{padding:14px 12px;margin:12px 0;border-radius:8px}
  section .sub{margin-bottom:10px}
  table{font-size:12px}
  th,td{padding:5px 7px}
  .grid2,.grid4{gap:8px}
  footer{margin-top:32px;gap:10px}
}
@media (max-width:360px){
  .grid4{grid-template-columns:1fr}
}