:root {
  --ink: #1b1b1b;
  --muted: #5a5a5a;
  --rule: #d4d4d4;
  --panel: #f3f3f3;
  --page: #ffffff;
  --head: #262626;
  --head-ink: #ffffff;
  --accent: #f96302;
  --link: #0b57a4;
  --code: #f5f5f5;
  --font: "Segoe UI", "Segoe UI Variable Text", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: "Cascadia Mono", "Cascadia Code", Consolas, "SF Mono", Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8e8e8; --muted: #a8a8a8; --rule: #3c3c3c; --panel: #262626;
    --page: #1b1b1b; --head: #111111; --link: #79b4ef; --code: #242424;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--page); color: var(--ink); font: 15px/1.55 var(--font); }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  display: flex; align-items: center; gap: 28px; padding: 0 24px; height: 48px;
  background: var(--head); color: var(--head-ink); border-bottom: 4px solid var(--accent);
}
.site-name { color: var(--head-ink); font-weight: 700; font-size: 16px; letter-spacing: .01em; }
.site-nav { display: flex; gap: 20px; font-size: 14px; }
.site-nav a { color: #d9d9d9; }
.site-nav a[aria-current] { color: #fff; font-weight: 600; }

.breadcrumbs { border-bottom: 1px solid var(--rule); padding: 9px 24px; font-size: 13px; background: var(--panel); }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; margin: 0; padding: 0; }
.breadcrumbs li + li::before { content: "/"; color: var(--muted); margin-right: 6px; }
.breadcrumbs [aria-current] { color: var(--muted); }

.layout { display: grid; grid-template-columns: 250px minmax(0, 1fr) 210px; gap: 36px; max-width: 1440px; margin: 0 auto; padding: 24px; }
.layout.wide { grid-template-columns: minmax(0, 1fr); max-width: 1180px; }
.layout.no-rail { grid-template-columns: 250px minmax(0, 1fr); }

.toc-wrap > summary { display: none; }
.toc { font-size: 13.5px; position: sticky; top: 16px; align-self: start; max-height: calc(100vh - 32px); overflow: auto; }
.toc-title { font-weight: 700; font-size: 14px; margin: 0 0 8px; }
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc li { margin: 0; }
.toc a { display: block; padding: 4px 8px; color: var(--ink); border-left: 3px solid transparent; }
.toc a[aria-current] { border-left-color: var(--accent); font-weight: 600; background: var(--panel); }
.toc .group { margin: 12px 0 4px; padding-left: 8px; font-size: 11.5px; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }

.rail { font-size: 13px; position: sticky; top: 16px; align-self: start; }
.rail h2 { font-size: 13px; margin: 0 0 8px; }
.rail ul { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--rule); }
.rail a { display: block; padding: 3px 10px; color: var(--muted); }

.article { min-width: 0; max-width: 820px; }
.article h1 { font-size: 30px; line-height: 1.25; font-weight: 600; margin: 0 0 10px; }
.article h2 { font-size: 22px; font-weight: 600; margin: 34px 0 10px; padding-bottom: 4px; border-bottom: 1px solid var(--rule); }
.article h3 { font-size: 17px; font-weight: 600; margin: 24px 0 8px; }
.article p, .article li { max-width: 78ch; }
.article code { font: 13px var(--mono); background: var(--code); padding: 1px 4px; border-radius: 2px; }
.article pre { background: var(--code); border: 1px solid var(--rule); padding: 12px 14px; overflow-x: auto; }
.article pre code { padding: 0; background: none; }
.article table { border-collapse: collapse; width: 100%; margin: 14px 0; font-size: 13.5px; display: block; overflow-x: auto; }
.article th { text-align: left; font-size: 11.5px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); background: var(--panel); border-bottom: 2px solid var(--ink); }
.article th, .article td { padding: 7px 10px; border-bottom: 1px solid var(--rule); vertical-align: top; }
.article tbody tr:nth-child(even) td { background: color-mix(in srgb, var(--panel) 45%, transparent); }

.meta { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 20px; font-size: 12px; }
.pill { display: inline-block; padding: 2px 9px; border: 1px solid var(--rule); border-radius: 999px; color: var(--muted); font-weight: 600; }
.pill.status { background: #6e6e6e; border-color: #6e6e6e; color: #fff; }
.pill.status.planned { background: transparent; border-color: var(--accent); color: var(--accent); }

.markdown-alert { border-left: 4px solid #6e6e6e; background: var(--panel); padding: 8px 14px; margin: 16px 0; }
.markdown-alert-title { display: flex; align-items: center; gap: 6px; font-weight: 700; margin: 0 0 4px; }
.markdown-alert-title svg { fill: currentColor; }
.markdown-alert-note { border-left-color: #0b57a4; }
.markdown-alert-important, .markdown-alert-warning { border-left-color: var(--accent); }
.markdown-alert-caution { border-left-color: #c00000; }

.catalog { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 14px; margin: 18px 0; }
.catalog .item { border: 1px solid var(--rule); border-top: 3px solid var(--head); padding: 12px 14px; }
.catalog .item h3 { margin: 0 0 4px; font-size: 16px; }
.catalog .item p { margin: 0 0 8px; font-size: 13.5px; }
.catalog .item dl { display: grid; grid-template-columns: auto 1fr; gap: 2px 10px; margin: 0; font-size: 12.5px; }
.catalog .item dt { color: var(--muted); }
.catalog .item dd { margin: 0; }

.site-footer { display: flex; flex-wrap: wrap; gap: 20px; padding: 16px 24px; margin-top: 40px; border-top: 1px solid var(--rule); font-size: 12.5px; color: var(--muted); }

@media (max-width: 1100px) { .layout { grid-template-columns: 220px minmax(0, 1fr); } .rail { display: none; } }
@media (max-width: 760px) {
  .toc-wrap > summary { display: block; cursor: pointer; font-weight: 600; font-size: 14px; padding: 4px 0; }
  .layout, .layout.no-rail { grid-template-columns: minmax(0, 1fr); padding: 16px; gap: 16px; }
  .toc { position: static; max-height: none; border-bottom: 1px solid var(--rule); padding-bottom: 12px; }
  .site-header { padding: 0 16px; gap: 14px; } .site-name { font-size: 15px; } .site-nav { gap: 12px; font-size: 13px; } .breadcrumbs { padding: 8px 16px; }
  .toc-wrap:not([open]) { border-bottom: 1px solid var(--rule); padding-bottom: 8px; }
  .article h1 { font-size: 25px; }
}