/* AI Workforce OS Documentation — core stylesheet
   No external fonts/CDN. System font stack only. */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --sidebar-width: 280px;
  --toc-width: 240px;
  --header-height: 60px;
  --radius: 6px;
  --radius-lg: 10px;
  --max-content: 840px;

  /* Light theme */
  --bg: #ffffff;
  --bg-alt: #f6f7f9;
  --bg-inset: #f0f2f5;
  --bg-sidebar: #f8f9fb;
  --bg-header: #ffffff;
  --bg-hover: #eef1f5;
  --border: #e1e4e9;
  --border-strong: #cbd1db;
  --text: #1a1d23;
  --text-muted: #5b6270;
  --text-faint: #8b93a3;
  --link: #2454ff;
  --link-hover: #163bcc;
  --accent: #2454ff;
  --accent-bg: #eaf0ff;
  --code-bg: #f0f2f5;
  --code-text: #b0165a;
  --shadow: 0 4px 16px rgba(20, 24, 33, 0.08);
  --shadow-sm: 0 1px 3px rgba(20, 24, 33, 0.08);

  --note-bg: #eaf1ff; --note-border: #2454ff; --note-text: #103a9e;
  --tip-bg: #eafbf1; --tip-border: #1a9e57; --tip-text: #0d5c33;
  --warn-bg: #fff7e6; --warn-border: #d98c00; --warn-text: #7a4f00;
  --success-bg: #eafbf1; --success-border: #1a9e57; --success-text: #0d5c33;
  --danger-bg: #fdeced; --danger-border: #d92d3c; --danger-text: #8c1622;
}

:root[data-theme="dark"] {
  --bg: #14161b;
  --bg-alt: #1a1d23;
  --bg-inset: #1f232b;
  --bg-sidebar: #16181e;
  --bg-header: #14161b;
  --bg-hover: #23272f;
  --border: #2b2f38;
  --border-strong: #3a3f4b;
  --text: #e7e9ee;
  --text-muted: #a3a9b7;
  --text-faint: #6d7383;
  --link: #6d93ff;
  --link-hover: #93aeff;
  --accent: #6d93ff;
  --accent-bg: #1c2440;
  --code-bg: #1f232b;
  --code-text: #ff8fc0;
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);

  --note-bg: #16233f; --note-border: #6d93ff; --note-text: #c3d3ff;
  --tip-bg: #123726; --tip-border: #2fbf72; --tip-text: #a6ecc7;
  --warn-bg: #3a2c0c; --warn-border: #e0a53a; --warn-text: #f4d99a;
  --success-bg: #123726; --success-border: #2fbf72; --success-text: #a6ecc7;
  --danger-bg: #3a151a; --danger-border: #e0596a; --danger-text: #f6b9c1;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14161b; --bg-alt: #1a1d23; --bg-inset: #1f232b; --bg-sidebar: #16181e;
    --bg-header: #14161b; --bg-hover: #23272f; --border: #2b2f38; --border-strong: #3a3f4b;
    --text: #e7e9ee; --text-muted: #a3a9b7; --text-faint: #6d7383;
    --link: #6d93ff; --link-hover: #93aeff; --accent: #6d93ff; --accent-bg: #1c2440;
    --code-bg: #1f232b; --code-text: #ff8fc0;
    --shadow: 0 4px 16px rgba(0,0,0,.4); --shadow-sm: 0 1px 3px rgba(0,0,0,.3);
    --note-bg: #16233f; --note-border: #6d93ff; --note-text: #c3d3ff;
    --tip-bg: #123726; --tip-border: #2fbf72; --tip-text: #a6ecc7;
    --warn-bg: #3a2c0c; --warn-border: #e0a53a; --warn-text: #f4d99a;
    --success-bg: #123726; --success-border: #2fbf72; --success-text: #a6ecc7;
    --danger-bg: #3a151a; --danger-border: #e0596a; --danger-text: #f6b9c1;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hover); text-decoration: underline; }

img { max-width: 100%; }

/* Skip link */
.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 999;
  background: var(--accent); color: #fff; padding: 10px 16px; border-radius: var(--radius);
}
.skip-link:focus { left: 8px; top: 8px; }

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  height: var(--header-height);
  display: flex; align-items: center; gap: 16px;
  padding: 0 16px;
  background: var(--bg-header);
  border-bottom: 1px solid var(--border);
}
.site-header .brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 16px; color: var(--text);
  white-space: nowrap;
}
.site-header .brand .logo-mark {
  width: 28px; height: 28px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), #7a4dff);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 800; font-size: 14px;
}
.version-badge {
  font-size: 11px; font-weight: 700; letter-spacing: .02em;
  background: var(--accent-bg); color: var(--accent);
  border: 1px solid var(--accent); border-radius: 999px;
  padding: 2px 9px; white-space: nowrap;
}
.menu-toggle {
  display: none;
  background: none; border: 1px solid var(--border); border-radius: var(--radius);
  width: 36px; height: 36px; align-items: center; justify-content: center;
  color: var(--text); cursor: pointer; flex-shrink: 0;
}

/* Search box */
.search-box { position: relative; flex: 1; max-width: 480px; margin: 0 auto; }
.search-box input {
  width: 100%; padding: 8px 36px 8px 34px;
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  background: var(--bg-alt); color: var(--text); font-size: 14px;
  font-family: var(--font-sans);
}
.search-box input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.search-box .search-icon {
  position: absolute; left: 10px; top: 50%; transform: translateY(-50%);
  color: var(--text-faint); pointer-events: none;
}
.search-box .search-kbd {
  position: absolute; right: 8px; top: 50%; transform: translateY(-50%);
  font-size: 11px; color: var(--text-faint); border: 1px solid var(--border);
  border-radius: 4px; padding: 1px 6px; background: var(--bg);
}
.search-results {
  position: absolute; top: calc(100% + 6px); left: 0; right: 0;
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-lg);
  box-shadow: var(--shadow); max-height: 60vh; overflow-y: auto; z-index: 60;
  display: none;
}
.search-results.open { display: block; }
.search-results .result-item {
  display: block; padding: 10px 14px; border-bottom: 1px solid var(--border);
  color: var(--text);
}
.search-results .result-item:last-child { border-bottom: none; }
.search-results .result-item:hover,
.search-results .result-item.active { background: var(--bg-hover); text-decoration: none; }
.search-results .result-item .result-title { font-weight: 600; font-size: 14px; }
.search-results .result-item .result-cat { font-size: 11px; color: var(--accent); text-transform: uppercase; letter-spacing: .04em; }
.search-results .result-item .result-snippet { font-size: 12.5px; color: var(--text-muted); margin-top: 2px; }
.search-results .result-empty { padding: 16px; color: var(--text-muted); font-size: 14px; text-align: center; }
.search-results mark { background: var(--accent-bg); color: var(--accent); border-radius: 3px; padding: 0 1px; }

.header-actions { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.icon-btn {
  width: 36px; height: 36px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--bg-alt); color: var(--text);
  display: flex; align-items: center; justify-content: center; cursor: pointer;
}
.icon-btn:hover { background: var(--bg-hover); }
.icon-btn svg { width: 18px; height: 18px; }
.theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: inline-flex; }

/* ===== Layout ===== */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr) var(--toc-width);
  max-width: 1440px;
  margin: 0 auto;
}
.layout.no-toc { grid-template-columns: var(--sidebar-width) minmax(0, 1fr); }
.sidebar-backdrop { display: none; }

/* ===== Sidebar ===== */
.sidebar {
  border-right: 1px solid var(--border);
  background: var(--bg-sidebar);
  padding: 20px 12px 60px;
  position: sticky; top: var(--header-height);
  height: calc(100vh - var(--header-height));
  overflow-y: auto;
}
.sidebar-collapse-btn {
  display: flex; align-items: center; gap: 8px; width: 100%;
  padding: 7px 10px; margin-bottom: 8px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--bg-alt); color: var(--text-muted);
  font-size: 12px; cursor: pointer; font-family: var(--font-sans);
}
.sidebar-collapse-btn:hover { background: var(--bg-hover); }
:root[data-sidebar="collapsed"] .sidebar { width: 60px; padding-left: 8px; padding-right: 8px; }
:root[data-sidebar="collapsed"] .layout { grid-template-columns: 60px minmax(0, 1fr) var(--toc-width); }
:root[data-sidebar="collapsed"] .layout.no-toc { grid-template-columns: 60px minmax(0, 1fr); }
:root[data-sidebar="collapsed"] .sidebar .nav-label,
:root[data-sidebar="collapsed"] .sidebar-group-title,
:root[data-sidebar="collapsed"] .sidebar-collapse-btn .collapse-label { display: none; }
:root[data-sidebar="collapsed"] .sidebar a.nav-link { justify-content: center; }
.sidebar-section { margin-bottom: 4px; }
.sidebar-group-title {
  font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .06em;
  color: var(--text-faint); padding: 14px 10px 6px;
}
.sidebar a.nav-link, .sidebar button.nav-toggle {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  width: 100%; text-align: left;
  padding: 7px 10px; border-radius: var(--radius);
  color: var(--text); font-size: 14px;
  border: none; background: none; cursor: pointer; font-family: var(--font-sans);
}
.sidebar a.nav-link:hover, .sidebar button.nav-toggle:hover { background: var(--bg-hover); text-decoration: none; }
.sidebar a.nav-link.active { background: var(--accent-bg); color: var(--accent); font-weight: 600; }
.sidebar .nav-caret { transition: transform .15s ease; color: var(--text-faint); flex-shrink: 0; }
.sidebar li.expanded > button .nav-caret { transform: rotate(90deg); }
.sidebar .nav-children {
  list-style: none; margin: 0; padding: 0 0 4px 14px;
  border-left: 1px solid var(--border);
  max-height: 0; overflow: hidden;
}
.sidebar li.expanded > .nav-children { max-height: 2000px; }
.sidebar ul { list-style: none; margin: 0; padding: 0; }
.sidebar li { margin: 1px 0; }

/* ===== Main content ===== */
.content {
  min-width: 0;
  padding: 28px 40px 80px;
}
.breadcrumb {
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px;
  font-size: 13px; color: var(--text-muted); margin-bottom: 18px;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: var(--text-faint); }
.breadcrumb .current { color: var(--text); font-weight: 600; }

.page-header { margin-bottom: 24px; }
.page-header h1 { margin: 0 0 8px; font-size: 32px; line-height: 1.25; }
.page-subtitle { color: var(--text-muted); font-size: 16px; margin: 0; }
.page-meta { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 12px; }
.pill {
  font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 999px;
  background: var(--bg-inset); color: var(--text-muted); border: 1px solid var(--border);
}

.prose { max-width: var(--max-content); }
.prose h2 {
  font-size: 22px; margin: 40px 0 14px; padding-top: 8px;
  border-top: 1px solid var(--border);
  scroll-margin-top: calc(var(--header-height) + 16px);
}
.prose section:first-of-type h2 { border-top: none; padding-top: 0; margin-top: 0; }
.prose h3 { font-size: 17px; margin: 24px 0 10px; scroll-margin-top: calc(var(--header-height) + 16px); }
.prose h2 .anchor-link, .prose h3 .anchor-link {
  opacity: 0; margin-left: 6px; color: var(--text-faint); font-weight: 400; font-size: .85em;
}
.prose h2:hover .anchor-link, .prose h3:hover .anchor-link { opacity: 1; }
.prose p { margin: 12px 0; color: var(--text); }
.prose ul, .prose ol { margin: 12px 0; padding-left: 24px; }
.prose li { margin: 6px 0; }
.prose ol.steps { padding-left: 0; list-style: none; counter-reset: step; }
.prose ol.steps > li {
  counter-increment: step;
  position: relative; padding: 4px 0 4px 40px; margin: 14px 0;
}
.prose ol.steps > li::before {
  content: counter(step);
  position: absolute; left: 0; top: 2px;
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--accent); color: #fff; font-weight: 700; font-size: 13px;
  display: flex; align-items: center; justify-content: center;
}
.prose strong { color: var(--text); }
.prose table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 14.5px; }
.prose th, .prose td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; }
.prose th { background: var(--bg-alt); font-weight: 700; }
.prose code {
  font-family: var(--font-mono); background: var(--code-bg); color: var(--code-text);
  padding: 2px 6px; border-radius: 4px; font-size: 13px;
}
.prose kbd {
  font-family: var(--font-mono); background: var(--bg-inset); border: 1px solid var(--border-strong);
  border-bottom-width: 2px; border-radius: 4px; padding: 1px 6px; font-size: 12.5px;
}

/* Code block with copy button */
.code-block { position: relative; margin: 16px 0; }
.code-block pre {
  background: var(--bg-inset); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 14px 16px; overflow-x: auto; font-size: 13px; line-height: 1.55;
}
.code-block pre code { background: none; padding: 0; color: var(--text); }
.copy-btn {
  position: absolute; top: 8px; right: 8px;
  font-size: 12px; padding: 4px 10px; border-radius: var(--radius);
  background: var(--bg); border: 1px solid var(--border); color: var(--text-muted);
  cursor: pointer; opacity: 0; transition: opacity .12s ease;
}
.code-block:hover .copy-btn, .copy-btn:focus { opacity: 1; }
.copy-btn.copied { color: var(--tip-border); border-color: var(--tip-border); }

/* Callouts */
.callout {
  display: flex; gap: 10px; align-items: flex-start;
  border-left: 4px solid var(--border); border-radius: var(--radius);
  background: var(--bg-alt); padding: 12px 14px; margin: 16px 0; font-size: 14.5px;
}
.callout .callout-icon { flex-shrink: 0; margin-top: 1px; }
.callout .callout-body p:first-child { margin-top: 0; }
.callout .callout-body p:last-child { margin-bottom: 0; }
.callout .callout-title { font-weight: 700; display: block; margin-bottom: 2px; }
.callout.note { background: var(--note-bg); border-color: var(--note-border); color: var(--note-text); }
.callout.tip { background: var(--tip-bg); border-color: var(--tip-border); color: var(--tip-text); }
.callout.warning { background: var(--warn-bg); border-color: var(--warn-border); color: var(--warn-text); }
.callout.success { background: var(--success-bg); border-color: var(--success-border); color: var(--success-text); }
.callout.not-available { background: var(--danger-bg); border-color: var(--danger-border); color: var(--danger-text); }

/* Screenshot placeholder */
.screenshot-placeholder {
  border: 1px dashed var(--border-strong); border-radius: var(--radius-lg);
  background: var(--bg-alt); color: var(--text-faint);
  padding: 46px 20px; text-align: center; font-size: 13.5px; margin: 18px 0;
}
.screenshot-placeholder .ph-icon { margin-bottom: 8px; opacity: .6; }
.screenshot-placeholder .ph-label { font-family: var(--font-mono); }

/* Feature status badges */
.status { font-size: 11.5px; font-weight: 700; padding: 2px 8px; border-radius: 4px; text-transform: uppercase; letter-spacing: .03em; }
.status.available { background: var(--tip-bg); color: var(--tip-text); }
.status.unavailable { background: var(--danger-bg); color: var(--danger-text); }
.status.partial { background: var(--warn-bg); color: var(--warn-text); }

/* Cards (homepage / category grids) */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; margin: 20px 0; }
.card {
  display: block; padding: 16px; border: 1px solid var(--border); border-radius: var(--radius-lg);
  background: var(--bg-alt); color: var(--text); transition: border-color .12s ease, transform .12s ease;
}
.card:hover { border-color: var(--accent); text-decoration: none; transform: translateY(-1px); }
.card .card-icon { font-size: 22px; margin-bottom: 8px; display: block; }
.card .card-title { font-weight: 700; font-size: 15px; margin-bottom: 4px; }
.card .card-desc { font-size: 13px; color: var(--text-muted); }

/* Related pages / FAQ */
.related-list { display: flex; flex-wrap: wrap; gap: 8px; }
.related-list a {
  font-size: 13.5px; padding: 6px 12px; border: 1px solid var(--border); border-radius: 999px;
  background: var(--bg-alt); color: var(--text);
}
.related-list a:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

details.faq-item {
  border: 1px solid var(--border); border-radius: var(--radius); margin: 8px 0; background: var(--bg-alt);
}
details.faq-item summary {
  cursor: pointer; padding: 12px 14px; font-weight: 600; font-size: 14.5px; list-style: none;
  display: flex; justify-content: space-between; align-items: center; gap: 10px;
}
details.faq-item summary::-webkit-details-marker { display: none; }
details.faq-item summary::after { content: "+"; color: var(--text-faint); font-size: 18px; }
details.faq-item[open] summary::after { content: "\2212"; }
details.faq-item .faq-answer { padding: 0 14px 14px; color: var(--text-muted); font-size: 14px; }

/* Prev/Next footer nav */
.page-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 48px 0 0; }
.page-nav a {
  border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 14px 16px;
  color: var(--text); display: block;
}
.page-nav a:hover { border-color: var(--accent); text-decoration: none; }
.page-nav .nav-dir { font-size: 12px; color: var(--text-faint); text-transform: uppercase; letter-spacing: .04em; }
.page-nav .nav-title { font-weight: 700; font-size: 14.5px; margin-top: 3px; }
.page-nav .next { text-align: right; grid-column: 2; }
.page-nav .prev:only-child { grid-column: 1; }

/* Site footer */
.site-footer {
  border-top: 1px solid var(--border); padding: 24px 40px; margin-top: 24px;
  font-size: 13px; color: var(--text-muted); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
}
.site-footer a { color: var(--text-muted); }
.site-footer .footer-links { display: flex; gap: 16px; flex-wrap: wrap; }

/* ===== TOC ===== */
.toc {
  padding: 28px 16px 60px;
  position: sticky; top: var(--header-height);
  height: calc(100vh - var(--header-height));
  overflow-y: auto;
  font-size: 13px;
  border-left: 1px solid var(--border);
}
.toc-title { font-weight: 700; font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--text-faint); margin-bottom: 10px; }
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc li { margin: 2px 0; }
.toc a {
  display: block; color: var(--text-muted); padding: 4px 0 4px 10px;
  border-left: 2px solid transparent;
}
.toc a.level-3 { padding-left: 22px; font-size: 12.5px; }
.toc a:hover { color: var(--text); text-decoration: none; }
.toc a.active { color: var(--accent); border-left-color: var(--accent); font-weight: 600; }

/* Home hero */
.hero { padding: 56px 40px 32px; max-width: 900px; }
.hero h1 { font-size: 40px; margin: 0 0 12px; }
.hero p.lead { font-size: 18px; color: var(--text-muted); margin: 0 0 24px; max-width: 640px; }
.hero-search { max-width: 560px; }
.hero-actions { display: flex; gap: 12px; margin-top: 20px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 18px; border-radius: var(--radius); font-weight: 600; font-size: 14.5px;
  border: 1px solid var(--border); cursor: pointer;
}
.btn.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn.primary:hover { background: var(--link-hover); text-decoration: none; }
.btn.secondary { background: var(--bg-alt); color: var(--text); }
.btn.secondary:hover { background: var(--bg-hover); text-decoration: none; }

.home-section { padding: 8px 40px 40px; max-width: 1100px; }
.home-section h2 { font-size: 22px; margin-bottom: 14px; }
.stat-row { display: flex; gap: 32px; flex-wrap: wrap; margin: 24px 0; }
.stat-row .stat-num { font-size: 28px; font-weight: 800; color: var(--accent); }
.stat-row .stat-label { font-size: 13px; color: var(--text-muted); }

/* keyboard focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}

::selection { background: var(--accent-bg); color: var(--accent); }

/* scrollbars (webkit) - subtle */
.sidebar::-webkit-scrollbar, .toc::-webkit-scrollbar { width: 8px; }
.sidebar::-webkit-scrollbar-thumb, .toc::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 8px; }