:root {
  color-scheme: light;
  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-muted: #eef2f7;
  --text: #1b2430;
  --muted: #5d6a79;
  --border: #d8e0e9;
  --link: #075985;
  --link-hover: #0c4a6e;
  --topbar: #102a43;
  --topbar-text: #f8fafc;
  --live-bg: #e6f4ea;
  --live-border: #29944a;
  --stage3-bg: #fff4d6;
  --stage3-border: #c77d00;
  --planned-bg: #e8edf4;
  --planned-border: #718096;
  --limited-bg: #fff4d6;
  --limited-border: #c77d00;
  --dev-bg: #fde8e8;
  --dev-border: #b42318;
}

* { box-sizing: border-box; }
html { overflow-x: hidden; }
body {
  margin: 0;
  min-width: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: var(--link); }
a:hover { color: var(--link-hover); }
.topbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 3.75rem;
  padding: .75rem 1rem;
  background: var(--topbar);
  color: var(--topbar-text);
}
.brand { flex: 1; min-width: 0; font-weight: 700; overflow-wrap: anywhere; }
.brand-version { font-weight: 500; opacity: .8; }
.nav-toggle { display: none; border: 1px solid #9fb4c8; border-radius: .45rem; padding: .45rem .65rem; background: transparent; color: inherit; cursor: pointer; }
.layout { display: grid; grid-template-columns: minmax(0, 16rem) minmax(0, 1fr) minmax(0, 15rem); gap: 1.5rem; max-width: 1440px; margin: 0 auto; padding: 1.5rem; }
.site-nav, main, .toc { min-width: 0; }
.site-nav { align-self: start; position: sticky; top: 1rem; max-height: calc(100vh - 2rem); overflow: auto; }
.nav-section + .nav-section { margin-top: 1.25rem; }
.nav-section h2, .toc h2 { margin: 0 0 .45rem; font-size: .78rem; letter-spacing: .04em; text-transform: uppercase; color: var(--muted); }
.nav-section ul, .toc ul { list-style: none; padding: 0; margin: 0; }
.nav-link { display: block; padding: .35rem .55rem; border-radius: .35rem; text-decoration: none; overflow-wrap: anywhere; }
.nav-link:hover { background: var(--surface-muted); }
.nav-current { background: var(--surface-muted); color: var(--text); font-weight: 700; }
main { background: var(--surface); border: 1px solid var(--border); border-radius: .65rem; padding: clamp(1rem, 3vw, 2.25rem); }
main > :first-child { margin-top: 0; }
h1, h2, h3, h4, h5, h6 { line-height: 1.25; scroll-margin-top: 1rem; }
h1 { font-size: clamp(1.65rem, 3vw, 2.3rem); }
h2 { margin-top: 2rem; font-size: 1.5rem; }
h3 { margin-top: 1.5rem; font-size: 1.2rem; }
h4, h5, h6 { margin-top: 1.25rem; font-size: 1rem; }
p, ul, ol, blockquote, pre, .table-scroll { margin: 1rem 0; }
ul, ol { padding-left: 1.5rem; }
li + li { margin-top: .35rem; }
blockquote { margin-left: 0; padding: .25rem 1rem; border-left: .25rem solid var(--border); color: var(--muted); }
hr { border: 0; border-top: 1px solid var(--border); margin: 2rem 0; }
code { padding: .12rem .3rem; border-radius: .25rem; background: var(--surface-muted); font-size: .92em; overflow-wrap: anywhere; word-break: break-word; }
pre { max-width: 100%; overflow-x: auto; padding: 1rem; border: 1px solid var(--border); border-radius: .45rem; background: #f1f5f9; }
pre code { padding: 0; background: transparent; overflow-wrap: normal; word-break: normal; white-space: pre; }
.table-scroll { max-width: 100%; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: .55rem .7rem; border: 1px solid var(--border); text-align: left; vertical-align: top; }
th { background: var(--surface-muted); }
input[type="checkbox"] { width: 1rem; height: 1rem; vertical-align: -.12rem; }
.status-banner { margin: .75rem 0 1.25rem; padding: .55rem .8rem; border-left: .28rem solid; border-radius: .3rem; font-weight: 700; }
.status-live { background: var(--live-bg); border-color: var(--live-border); }
.status-stage3 { background: var(--stage3-bg); border-color: var(--stage3-border); }
.status-planned { background: var(--planned-bg); border-color: var(--planned-border); }
.status-limited { background: var(--limited-bg); border-color: var(--limited-border); }
.status-dev { background: var(--dev-bg); border-color: var(--dev-border); }
.toc { align-self: start; position: sticky; top: 1rem; max-height: calc(100vh - 2rem); overflow: auto; }
.toc li { border-left: 1px solid var(--border); }
.toc li + li { margin-top: 0; }
.toc a { display: block; padding: .25rem .6rem; text-decoration: none; overflow-wrap: anywhere; }
.toc-level-3 a { padding-left: 1.25rem; font-size: .92rem; }
@media (max-width: 960px) { .layout { grid-template-columns: minmax(0, 13rem) minmax(0, 1fr); } .toc { display: none; } }
@media (max-width: 700px) {
  .topbar { padding-left: 1rem; padding-right: 1rem; }
  .nav-toggle { display: inline-block; }
  .layout { display: block; padding: 1rem; }
  .site-nav { display: none; position: static; max-height: none; margin-bottom: 1rem; padding: .75rem; background: var(--surface); border: 1px solid var(--border); border-radius: .55rem; }
  body.nav-open .site-nav { display: block; }
  main { padding: 1rem; }
}
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #0f1720;
    --surface: #17212b;
    --surface-muted: #243240;
    --text: #e6edf3;
    --muted: #a9b7c5;
    --border: #3a4a59;
    --link: #7dd3fc;
    --link-hover: #bae6fd;
    --topbar: #091522;
    --topbar-text: #f8fafc;
    --live-bg: #143522;
    --live-border: #56c878;
    --stage3-bg: #493714;
    --stage3-border: #f0b44d;
    --planned-bg: #263546;
    --planned-border: #9fb0c3;
    --limited-bg: #493714;
    --limited-border: #f0b44d;
    --dev-bg: #4a1c1c;
    --dev-border: #f19999;
  }
  pre { background: #101923; }
}