/* UIForge docs: the BBB brand (warm dark, sky accent), GitBook-like layout. */
:root {
  --bg: #0f0f0e; --bg-2: #141413; --surface: #1b1b19; --surface-2: #22221f;
  --ink: #edebe5; --ink-2: #c9c6bd; --ink-3: #8e8b83; --ink-4: #5f5d58;
  --line: rgba(237, 235, 229, 0.09); --line-strong: rgba(237, 235, 229, 0.2);
  --accent: #6cb2e6; --accent-2: #4f93c7; --accent-3: #3a76a3;
  --ok: #86c79d; --warn: #e0a25a; --err: #eb8f7e;
  --code-bg: #171715;
  --side-w: 280px; --toc-w: 230px; --top-h: 60px;
  --display: 'Bricolage Grotesque', Georgia, serif;
  --body: 'Geist', ui-sans-serif, system-ui, sans-serif;
  --mono: 'Geist Mono', ui-monospace, monospace;
}
:root[data-theme='light'] {
  --bg: #f6f4ef; --bg-2: #efece6; --surface: #fbfaf7; --surface-2: #ecE8e0;
  --ink: #161614; --ink-2: #3a3935; --ink-3: #6b6962; --ink-4: #9f9c94;
  --line: rgba(22, 22, 20, 0.1); --line-strong: rgba(22, 22, 20, 0.22);
  --accent: #2f7fb8; --accent-2: #4f93c7; --accent-3: #6cb2e6;
  --code-bg: #efece6;
}
* { box-sizing: border-box; }
html { scroll-padding-top: calc(var(--top-h) + 20px); }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.65 var(--body); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* top bar */
.top { position: sticky; top: 0; z-index: 20; height: var(--top-h); display: flex; align-items: center; gap: 18px; padding: 0 20px;
  background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font: 650 18px var(--display); letter-spacing: -0.02em; white-space: nowrap; }
.brand:hover { text-decoration: none; }
.brand b { color: var(--accent); font-weight: 650; }
.logo { display: grid; gap: 3px; width: 26px; }
.logo i { display: block; height: 6px; border-radius: 3px; background: var(--accent); }
.logo i:nth-child(1) { border-radius: 6px 6px 3px 3px; }
.logo i:nth-child(2) { width: 82%; margin-left: 18%; background: var(--accent-2); }
.logo i:nth-child(3) { width: 64%; margin-left: 36%; background: var(--accent-3); }
.search { position: relative; flex: 1; max-width: 460px; margin-left: auto; }
.search .bi { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--ink-3); }
.search input { width: 100%; height: 38px; padding: 0 40px 0 36px; border-radius: 10px; border: 1px solid var(--line-strong); background: var(--surface);
  color: var(--ink); font: 14px var(--body); outline: none; }
.search input:focus { border-color: var(--accent); }
.kbd { position: absolute; right: 10px; top: 50%; transform: translateY(-50%); font: 12px var(--mono); color: var(--ink-4); border: 1px solid var(--line-strong); border-radius: 5px; padding: 0 5px; }
.results { position: absolute; top: 44px; left: 0; right: 0; max-height: 60vh; overflow: auto; background: var(--surface); border: 1px solid var(--line-strong);
  border-radius: 12px; box-shadow: 0 24px 60px -20px rgba(0, 0, 0, 0.6); padding: 6px; }
.results a { display: block; padding: 8px 10px; border-radius: 8px; color: var(--ink); }
.results a:hover, .results a.is-on { background: var(--surface-2); text-decoration: none; }
.results small { display: block; color: var(--ink-3); font-size: 12.5px; }
.results mark { background: none; color: var(--accent); }
.top-links { display: flex; align-items: center; gap: 6px; }
.top-links a { display: flex; align-items: center; gap: 6px; padding: 6px 10px; border-radius: 8px; color: var(--ink-2); font-size: 14px; white-space: nowrap; }
.top-links a:hover { background: var(--surface); color: var(--ink); text-decoration: none; }
.icon-btn { width: 36px; height: 36px; display: grid; place-items: center; border-radius: 8px; border: 0; background: none; color: var(--ink-2); font-size: 18px; cursor: pointer; }
.icon-btn:hover { background: var(--surface); color: var(--ink); }
.menu-btn { display: none; }

/* layout */
.shell { display: grid; grid-template-columns: var(--side-w) minmax(0, 1fr) var(--toc-w); max-width: 1440px; margin: 0 auto; }
.side { position: sticky; top: var(--top-h); height: calc(100vh - var(--top-h)); overflow: auto; padding: 22px 14px 40px 20px; border-right: 1px solid var(--line); }
.side h4 { margin: 18px 0 6px 10px; font: 600 11.5px var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-4); }
.side h4:first-child { margin-top: 0; }
.side a { display: flex; align-items: center; gap: 9px; padding: 6px 10px; border-radius: 8px; color: var(--ink-2); font-size: 14.5px; }
.side a .bi { color: var(--ink-4); font-size: 15px; }
.side a:hover { background: var(--surface); color: var(--ink); text-decoration: none; }
.side a.is-on { background: color-mix(in srgb, var(--accent) 14%, transparent); color: var(--ink); font-weight: 550; }
.side a.is-on .bi { color: var(--accent); }
.side .sub { margin-left: 18px; border-left: 1px solid var(--line); padding-left: 6px; }
.page { min-width: 0; padding: 34px 56px 60px; }
.toc { position: sticky; top: var(--top-h); height: calc(100vh - var(--top-h)); overflow: auto; padding: 34px 20px; font-size: 13.5px; }
.toc h5 { margin: 0 0 10px; font: 600 11.5px var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-4); }
.toc a { display: block; padding: 3px 0 3px 10px; color: var(--ink-3); border-left: 2px solid var(--line); }
.toc a.l3 { padding-left: 22px; }
.toc a.is-on { color: var(--ink); border-left-color: var(--accent); text-decoration: none; }
.crumbs { font: 12.5px var(--mono); color: var(--ink-4); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 8px; }

/* content */
.doc { max-width: 800px; }
.doc h1 { font: 700 44px/1.02 var(--display); letter-spacing: -0.04em; margin: 0 0 12px; }
.doc .lead { font-size: 18.5px; color: var(--ink-2); margin: 0 0 28px; }
.doc h2 { font: 680 28px/1.15 var(--display); letter-spacing: -0.03em; margin: 44px 0 12px; padding-top: 8px; }
.doc h3 { font: 650 20px/1.25 var(--display); letter-spacing: -0.02em; margin: 30px 0 8px; }
.doc h2 .anchor, .doc h3 .anchor { opacity: 0; margin-left: 8px; color: var(--ink-4); font-weight: 400; }
.doc h2:hover .anchor, .doc h3:hover .anchor { opacity: 1; }
.doc p, .doc li { color: var(--ink-2); }
.doc strong { color: var(--ink); }
.doc img { max-width: 100%; border-radius: 12px; border: 1px solid var(--line); }
.doc hr { border: 0; border-top: 1px solid var(--line); margin: 36px 0; }
.doc code { font: 0.88em var(--mono); background: var(--surface-2); padding: 0.12em 0.4em; border-radius: 5px; color: var(--ink); }
.doc pre { position: relative; background: var(--code-bg); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; overflow: auto; font-size: 13.5px; line-height: 1.6; }
.doc pre code { background: none; padding: 0; font-size: inherit; }
.doc pre .copy { position: absolute; top: 8px; right: 8px; opacity: 0; transition: opacity 0.15s; border: 1px solid var(--line-strong); background: var(--surface); color: var(--ink-2);
  border-radius: 7px; font: 12px var(--body); padding: 3px 8px; cursor: pointer; }
.doc pre:hover .copy { opacity: 1; }
.doc table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 14.5px; display: block; overflow-x: auto; }
.doc th { text-align: left; font: 600 12px var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-3); border-bottom: 1px solid var(--line-strong); padding: 8px 12px; }
.doc td { border-bottom: 1px solid var(--line); padding: 9px 12px; vertical-align: top; color: var(--ink-2); }
.doc td code { white-space: nowrap; }
.doc blockquote { margin: 18px 0; padding: 12px 16px 12px 46px; border-radius: 12px; background: var(--surface); border: 1px solid var(--line); position: relative; }
.doc blockquote p { margin: 4px 0; }
.doc blockquote::before { content: '\F431'; font-family: 'bootstrap-icons'; position: absolute; left: 16px; top: 13px; color: var(--accent); }
.doc blockquote.tip::before { content: '\F46A'; color: var(--ok); }
.doc blockquote.warning::before { content: '\F33B'; color: var(--warn); }
.doc blockquote.danger::before { content: '\F33A'; color: var(--err); }
.doc .badge { display: inline-block; font: 600 11px var(--mono); padding: 1px 7px; border-radius: 99px; border: 1px solid var(--line-strong); color: var(--ink-3); vertical-align: middle; margin-left: 6px; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; margin: 20px 0; }
.cards a { display: block; padding: 16px; border-radius: 12px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); }
.cards a:hover { border-color: var(--accent); text-decoration: none; transform: translateY(-2px); transition: transform 0.15s; }
.cards .bi { font-size: 20px; color: var(--accent); }
.cards b { display: block; margin: 8px 0 2px; font: 650 16px var(--display); }
.cards small { color: var(--ink-3); font-size: 13.5px; line-height: 1.45; display: block; }
.pager { display: flex; gap: 12px; max-width: 800px; margin-top: 48px; }
.pager a { flex: 1; padding: 14px 16px; border: 1px solid var(--line); border-radius: 12px; color: var(--ink); }
.pager a:hover { border-color: var(--accent); text-decoration: none; }
.pager small { display: block; color: var(--ink-4); font: 12px var(--mono); text-transform: uppercase; letter-spacing: 0.1em; }
.pager .next { text-align: right; }
.foot { max-width: 800px; margin-top: 40px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--ink-4); font-size: 13px; }
.loading { color: var(--ink-3); }

/* highlight.js, brand colours */
.hljs-keyword, .hljs-selector-tag, .hljs-built_in { color: #b39cf0; }
.hljs-string, .hljs-attr + .hljs-string { color: #86c79d; }
.hljs-attr, .hljs-name, .hljs-property { color: var(--accent); }
.hljs-number, .hljs-literal { color: #e0a25a; }
.hljs-comment { color: var(--ink-4); font-style: italic; }
.hljs-title, .hljs-title.function_, .hljs-type { color: #ec8fb8; }
.hljs-meta, .hljs-bullet { color: var(--ink-3); }

@media (max-width: 1180px) { .shell { grid-template-columns: var(--side-w) minmax(0, 1fr); } .toc { display: none; } }
@media (max-width: 820px) {
  .shell { grid-template-columns: 1fr; }
  .menu-btn { display: grid; }
  .side { position: fixed; top: var(--top-h); left: 0; width: 290px; z-index: 15; background: var(--bg); transform: translateX(-100%); transition: transform 0.2s; }
  body.side-open .side { transform: none; }
  .page { padding: 24px 18px 50px; }
  .doc h1 { font-size: 34px; }
  .top-links a span, .kbd { display: none; }
  .brand span:last-child { display: none; }
}