/* ============================================================
   OPENSENTINEL DOCS - Shared Stylesheet
   Inspired by OpenClaw docs / Docusaurus / VitePress
   ============================================================ */

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg-body: #0b0d11;
  --bg-surface: #12151b;
  --bg-card: #171b22;
  --bg-card-hover: #1c2029;
  --bg-code: #0d1017;
  --bg-inline-code: rgba(16, 185, 129, 0.08);
  --bg-sidebar: #0f1218;

  --text-primary: #e6edf3;
  --text-secondary: #9ca3b0;
  --text-muted: #6b7280;
  --text-faint: #4b5563;

  --accent: #10b981;
  --accent-hover: #34d399;
  --accent-dim: rgba(16, 185, 129, 0.12);
  --accent-border: rgba(16, 185, 129, 0.25);
  --cyan: #06b6d4;
  --blue: #3b82f6;
  --yellow: #eab308;
  --red: #ef4444;
  --orange: #f97316;

  --border: rgba(255, 255, 255, 0.07);
  --border-hover: rgba(255, 255, 255, 0.14);

  --radius: 10px;
  --radius-sm: 6px;
  --radius-lg: 14px;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  --header-height: 56px;
  --sidebar-width: 272px;
}

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 16px); }

body {
  font-family: var(--font-sans);
  background: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

code, pre, kbd { font-family: var(--font-mono); }


/* ========================================
   HEADER
   ======================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(11, 13, 17, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 24px;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 24px;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 15px;
  color: var(--text-primary);
}

.header-logo:hover { color: var(--text-primary); }

.header-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--accent-dim);
  color: var(--accent);
  letter-spacing: 0.02em;
}

.header-nav {
  display: flex;
  gap: 4px;
}

.header-nav a {
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.15s;
}

.header-nav a:hover { background: var(--bg-card); color: var(--text-primary); }
.header-nav a.active { background: var(--accent-dim); color: var(--accent); }

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-search {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-surface);
  font-size: 13px;
  color: var(--text-muted);
  cursor: pointer;
  transition: border-color 0.15s;
  min-width: 200px;
}

.header-search:hover { border-color: var(--border-hover); }

.header-search kbd {
  font-size: 11px;
  padding: 1px 6px;
  border-radius: 3px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-faint);
  margin-left: auto;
}

.header-github {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: all 0.15s;
}

.header-github:hover { background: var(--bg-card); color: var(--text-primary); }

.header-mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 4px;
}


/* ========================================
   HUB LAYOUT (docs landing page)
   ======================================== */
.hub {
  max-width: 960px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.hub-hero {
  text-align: center;
  margin-bottom: 48px;
}

.hub-hero-icon {
  margin-bottom: 16px;
}

.hub-hero h1 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}

.hub-hero p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* Primary action cards */
.hub-actions {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 48px;
}

.hub-action-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 28px 20px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-card);
  transition: all 0.2s;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}

.hub-action-card:hover {
  border-color: var(--accent-border);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
  color: inherit;
}

.hub-action-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 14px;
}

.hub-action-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}

.hub-action-card p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* What is section */
.hub-section {
  margin-bottom: 48px;
}

.hub-section h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

.hub-section > p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}

/* Architecture diagram */
.hub-arch {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-code);
  padding: 24px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.hub-arch .hl { color: var(--accent); }
.hub-arch .cy { color: var(--cyan); }
.hub-arch .dim { color: var(--text-faint); }

/* Capability cards */
.hub-caps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.hub-cap {
  padding: 18px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
  transition: border-color 0.15s;
}

.hub-cap:hover { border-color: var(--border-hover); }

.hub-cap-icon {
  font-size: 20px;
  margin-bottom: 8px;
}

.hub-cap h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
}

.hub-cap p {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Quick start code */
.hub-quickstart {
  margin-bottom: 48px;
}

.hub-quickstart h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

/* Nav card groups */
.hub-nav-group {
  margin-bottom: 32px;
}

.hub-nav-group h3 {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.hub-nav-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.hub-nav-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.15s;
}

.hub-nav-card:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: var(--bg-card-hover);
}

.hub-nav-card .icon { font-size: 16px; flex-shrink: 0; }


/* ========================================
   DOC PAGE LAYOUT (sidebar + content)
   ======================================== */
.doc-layout {
  display: flex;
  min-height: calc(100vh - var(--header-height));
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  position: fixed;
  top: var(--header-height);
  left: 0;
  bottom: 0;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 12px 0;
  z-index: 40;
}

.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.sidebar-group { padding: 0 8px; margin-bottom: 4px; }

.sidebar-group-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  padding: 16px 12px 6px;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text-secondary);
  transition: all 0.12s;
}

.sidebar-link:hover {
  background: var(--bg-card);
  color: var(--text-primary);
}

.sidebar-link.active {
  background: var(--accent-dim);
  color: var(--accent);
  font-weight: 600;
}

.sidebar-link .ico { width: 18px; text-align: center; flex-shrink: 0; font-size: 13px; }

/* Main content area */
.doc-main {
  margin-left: var(--sidebar-width);
  flex: 1;
  max-width: 780px;
  padding: 36px 48px 80px;
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-faint);
  margin-bottom: 28px;
}

.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent); }


/* ========================================
   CONTENT TYPOGRAPHY
   ======================================== */
.content h1 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.content .lead {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
}

.content h2 {
  font-size: 22px;
  font-weight: 700;
  margin-top: 40px;
  margin-bottom: 14px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

.content h3 {
  font-size: 17px;
  font-weight: 600;
  margin-top: 28px;
  margin-bottom: 10px;
}

.content p {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 14px;
}

.content ul, .content ol {
  padding-left: 20px;
  margin-bottom: 14px;
}

.content li {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 3px;
}

.content strong { color: var(--text-primary); }

.content p code, .content li code, .content td code {
  background: var(--bg-inline-code);
  padding: 2px 7px;
  border-radius: 4px;
  font-size: 13px;
  color: var(--accent);
}


/* ========================================
   CODE BLOCKS
   ======================================== */
.codeblock {
  margin: 14px 0 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-code);
  overflow: hidden;
}

.codeblock-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 14px;
  background: rgba(255,255,255,0.02);
  border-bottom: 1px solid var(--border);
}

.codeblock-lang {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.codeblock-copy {
  background: none;
  border: none;
  font-size: 12px;
  color: var(--text-faint);
  cursor: pointer;
  padding: 2px 8px;
  border-radius: 4px;
  font-family: var(--font-sans);
  transition: all 0.12s;
}

.codeblock-copy:hover { background: var(--bg-card); color: var(--text-secondary); }

.codeblock pre {
  padding: 14px 16px;
  font-size: 13px;
  line-height: 1.7;
  overflow-x: auto;
}

/* Tabs inside code blocks */
.codeblock-tabs {
  display: flex;
  gap: 0;
  padding: 0 14px;
  background: rgba(255,255,255,0.02);
  border-bottom: 1px solid var(--border);
}

.codeblock-tab {
  padding: 8px 14px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-faint);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
  font-family: var(--font-sans);
  transition: all 0.12s;
}

.codeblock-tab:hover { color: var(--text-secondary); }
.codeblock-tab.active { color: var(--accent); border-bottom-color: var(--accent); }

/* Syntax colors */
.ck { color: #c084fc; }    /* keyword */
.cs { color: #34d399; }    /* string */
.cf { color: #60a5fa; }    /* function */
.cv { color: #fbbf24; }    /* variable/flag */
.cc { color: var(--text-faint); font-style: italic; }  /* comment */
.cp { color: var(--accent); user-select: none; }        /* prompt */


/* ========================================
   CALLOUTS
   ======================================== */
.callout {
  display: flex;
  gap: 12px;
  padding: 14px 18px;
  border-radius: var(--radius);
  margin: 18px 0;
  font-size: 13.5px;
  line-height: 1.7;
  border: 1px solid;
}

.callout-ico { font-size: 16px; flex-shrink: 0; margin-top: 2px; }

.callout p { margin-bottom: 0; font-size: 13.5px; }
.callout a { text-decoration: underline; }

.callout-info {
  background: rgba(59, 130, 246, 0.06);
  border-color: rgba(59, 130, 246, 0.18);
  color: var(--text-secondary);
}

.callout-tip {
  background: var(--accent-dim);
  border-color: var(--accent-border);
  color: var(--text-secondary);
}

.callout-warn {
  background: rgba(249, 115, 22, 0.06);
  border-color: rgba(249, 115, 22, 0.18);
  color: var(--text-secondary);
}

.callout-success {
  background: rgba(16, 185, 129, 0.06);
  border-color: rgba(16, 185, 129, 0.18);
  color: var(--text-secondary);
}


/* ========================================
   STEPS
   ======================================== */
.steps {
  counter-reset: step-counter;
  margin: 20px 0;
}

.step {
  counter-increment: step-counter;
  position: relative;
  padding-left: 48px;
  padding-bottom: 28px;
  margin-left: 15px;
  border-left: 2px solid var(--border);
}

.step:last-child { border-left-color: transparent; padding-bottom: 0; }

.step::before {
  content: counter(step-counter);
  position: absolute;
  left: -16px;
  top: 0;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--bg-body);
  border: 2px solid var(--accent);
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
  margin-top: 2px;
}

.step p { font-size: 14px; }


/* ========================================
   TABLES
   ======================================== */
.content table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0 20px;
  font-size: 13.5px;
}

.content table th {
  text-align: left;
  padding: 9px 14px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  font-weight: 600;
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.content table td {
  padding: 9px 14px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
}


/* ========================================
   GO DEEPER / PAGE NAV
   ======================================== */
.go-deeper {
  margin-top: 40px;
}

.go-deeper h3 {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  margin-bottom: 12px;
}

.go-deeper-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.go-deeper-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  transition: all 0.15s;
}

.go-deeper-card:hover {
  border-color: var(--accent-border);
  color: var(--text-primary);
  background: var(--bg-card-hover);
}

.go-deeper-card .ico { font-size: 20px; flex-shrink: 0; }

.go-deeper-card strong {
  display: block;
  font-size: 14px;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.go-deeper-card span {
  font-size: 12px;
  color: var(--text-muted);
}

/* Page bottom nav */
.page-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.page-nav-link {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: all 0.15s;
  color: inherit;
  max-width: 48%;
}

.page-nav-link:hover {
  border-color: var(--border-hover);
  background: var(--bg-card);
  color: inherit;
}

.page-nav-label { font-size: 11px; color: var(--text-faint); }
.page-nav-title { font-size: 14px; font-weight: 600; color: var(--text-primary); }
.page-nav-link--next { text-align: right; margin-left: auto; }


/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 900px) {
  .sidebar { display: none; }
  .doc-main { margin-left: 0; padding: 24px 20px 60px; }

  .hub-actions { grid-template-columns: 1fr; }
  .hub-caps { grid-template-columns: 1fr 1fr; }
  .hub-nav-cards { grid-template-columns: 1fr; }
  .go-deeper-cards { grid-template-columns: 1fr; }

  .header-search { display: none; }
  .header-nav { display: none; }
  .header-mobile-toggle { display: block; }
}

@media (max-width: 600px) {
  .hub-caps { grid-template-columns: 1fr; }
}