/* ============================================
   SNServiXO Documentation — Global Styles
   ============================================ */

/* ---- CSS Variables (Light Theme) ---- */
:root {
  --brand-primary: #4F46E5;
  --brand-primary-light: #6366F1;
  --brand-primary-dark: #3730A3;
  --brand-accent: #7C3AED;
  --brand-gradient: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);

  --sidebar-width: 280px;
  --topbar-height: 56px;
  --page-nav-width: 220px;

  --bg-page: #F8F9FC;
  --bg-content: #FFFFFF;
  --bg-sidebar: #FFFFFF;
  --bg-topbar: rgba(255, 255, 255, 0.95);
  --bg-card: #FFFFFF;
  --bg-code: #F3F4F6;
  --bg-callout-info: #EEF2FF;
  --bg-callout-tip: #F0FDF4;
  --bg-callout-warn: #FFFBEB;
  --bg-callout-danger: #FEF2F2;

  --text-primary: #111827;
  --text-secondary: #4B5563;
  --text-muted: #9CA3AF;
  --text-link: #4F46E5;
  --text-on-brand: #FFFFFF;

  --border-color: #E5E7EB;
  --border-sidebar: #E5E7EB;

  --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

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

  --nav-item-active: #EEF2FF;
  --nav-item-active-text: #4F46E5;
  --nav-item-hover: #F3F4F6;

  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---- Dark Theme ---- */
[data-theme="dark"] {
  --bg-page: #0F1117;
  --bg-content: #1A1D27;
  --bg-sidebar: #13151F;
  --bg-topbar: rgba(19, 21, 31, 0.97);
  --bg-card: #1E2130;
  --bg-code: #252836;
  --bg-callout-info: #1E2749;
  --bg-callout-tip: #0D2818;
  --bg-callout-warn: #2D2000;
  --bg-callout-danger: #2D0E0E;

  --text-primary: #F1F3F9;
  --text-secondary: #9CA3AF;
  --text-muted: #6B7280;
  --text-link: #818CF8;

  --border-color: #2D3048;
  --border-sidebar: #2D3048;

  --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.3);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.4);

  --nav-item-active: #1E2749;
  --nav-item-active-text: #818CF8;
  --nav-item-hover: #1E2130;
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-sans);
  background: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
}
a { color: var(--text-link); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }

/* ============================================
   LAYOUT
   ============================================ */
.layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin-left: var(--sidebar-width);
  transition: margin-left var(--transition);
}

/* ============================================
   SIDEBAR
   ============================================ */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-sidebar);
  overflow-y: auto;
  overflow-x: hidden;
  z-index: 100;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), background var(--transition);
}

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

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border-sidebar);
  flex-shrink: 0;
}

.logo-link { display: flex; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { flex-shrink: 0; }
.logo-text { display: flex; flex-direction: column; line-height: 1.1; }
.logo-name { font-size: 15px; font-weight: 700; color: var(--text-primary); letter-spacing: -0.3px; }
.logo-tag {
  font-size: 10px;
  font-weight: 600;
  color: var(--brand-primary);
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.sidebar-close {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
}
.sidebar-close:hover { background: var(--nav-item-hover); }

/* Search */
.search-box {
  position: relative;
  margin: 14px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 8px 12px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.search-box:focus-within {
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(79,70,229,0.12);
}
.search-icon { color: var(--text-muted); flex-shrink: 0; }
#searchInput {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  font-size: 13px;
  font-family: var(--font-sans);
  color: var(--text-primary);
}
#searchInput::placeholder { color: var(--text-muted); }
.search-kbd {
  font-size: 10px;
  color: var(--text-muted);
  background: var(--bg-content);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 1px 5px;
  font-family: var(--font-mono);
  flex-shrink: 0;
}

/* Nav */
.nav-tree { flex: 1; padding: 8px 0 16px; overflow-y: auto; }
.nav-section { padding: 8px 0; }
.nav-label {
  display: block;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  padding: 6px 20px 4px;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 20px;
  font-size: 13.5px;
  font-weight: 450;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: 0;
  transition: all var(--transition);
  border-left: 2px solid transparent;
  text-decoration: none;
}
.nav-item:hover { background: var(--nav-item-hover); color: var(--text-primary); text-decoration: none; }
.nav-item.active {
  background: var(--nav-item-active);
  color: var(--nav-item-active-text);
  border-left-color: var(--brand-primary);
  font-weight: 600;
}
.nav-item.sub { padding-left: 38px; font-size: 13px; }
.nav-item.sub.active { border-left-color: var(--brand-primary); }

.nav-group-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 20px;
  width: 100%;
  background: none;
  border: none;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  text-align: left;
  transition: all var(--transition);
  border-left: 2px solid transparent;
  font-family: var(--font-sans);
}
.nav-group-btn:hover { background: var(--nav-item-hover); color: var(--text-primary); }
.nav-group-btn .chevron { margin-left: auto; transition: transform var(--transition); }
.nav-group.open .nav-group-btn .chevron { transform: rotate(180deg); }
.nav-group-children { display: none; }
.nav-group.open .nav-group-children { display: block; }

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border-sidebar);
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex-shrink: 0;
}
.support-link {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  color: var(--brand-primary);
  font-weight: 500;
}
.support-link:hover { text-decoration: underline; }
.doc-version { font-size: 11px; color: var(--text-muted); }

/* ============================================
   TOPBAR
   ============================================ */
.topbar {
  position: sticky;
  top: 0;
  height: var(--topbar-height);
  background: var(--bg-topbar);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  z-index: 50;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background var(--transition);
}
.topbar-left { display: flex; align-items: center; gap: 12px; }
.topbar-right { display: flex; align-items: center; gap: 8px; }

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
}
.menu-toggle:hover { background: var(--nav-item-hover); }

.breadcrumb { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-muted); }
.breadcrumb span:last-child { color: var(--text-primary); font-weight: 500; }

.theme-toggle {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  transition: all var(--transition);
}
.theme-toggle:hover { background: var(--nav-item-hover); color: var(--text-primary); }
.sun-icon { display: block; }
.moon-icon { display: none; }
[data-theme="dark"] .sun-icon { display: none; }
[data-theme="dark"] .moon-icon { display: block; }

.topbar-support {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--brand-primary);
  color: white;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  transition: all var(--transition);
}
.topbar-support:hover { background: var(--brand-primary-dark); text-decoration: none; opacity: 0.92; }

/* ============================================
   CONTENT
   ============================================ */
.content {
  flex: 1;
  min-width: 0;
  padding: 40px 48px;
  max-width: 900px;
}

/* Sections */
.doc-section { display: none; animation: fadeIn 0.25s ease; }
.doc-section.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* Section header */
.section-header { margin-bottom: 32px; }
.section-header h1 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.5px;
  margin-bottom: 12px;
  line-height: 1.2;
}
.section-intro {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 680px;
}

/* Typography */
h2 {
  font-size: 22px;
  font-weight: 650;
  color: var(--text-primary);
  margin: 36px 0 14px;
  letter-spacing: -0.3px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}
h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 24px 0 10px;
}
h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary);
  margin: 18px 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}
p { margin-bottom: 14px; color: var(--text-secondary); font-size: 15px; line-height: 1.75; }
ul, ol { padding-left: 22px; margin-bottom: 14px; }
li { margin-bottom: 6px; color: var(--text-secondary); font-size: 15px; line-height: 1.65; }

/* Code */
code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--bg-code);
  color: var(--brand-accent);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border-color);
}
pre {
  background: var(--bg-code);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  overflow-x: auto;
  margin-bottom: 20px;
}
pre code { background: none; border: none; padding: 0; color: var(--text-primary); font-size: 13px; }

/* Tables */
.doc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin-bottom: 24px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
}
.doc-table th {
  background: var(--bg-page);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}
.doc-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}
.doc-table tr:last-child td { border-bottom: none; }
.doc-table tr:hover td { background: var(--nav-item-hover); }

/* Callouts */
.callout {
  display: flex;
  gap: 14px;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  border: 1px solid transparent;
  font-size: 14.5px;
  line-height: 1.65;
}
.callout-icon { font-size: 18px; flex-shrink: 0; line-height: 1; margin-top: 1px; }
.callout--info { background: var(--bg-callout-info); border-color: rgba(79,70,229,0.2); color: var(--text-primary); }
.callout--tip { background: var(--bg-callout-tip); border-color: rgba(34,197,94,0.2); color: var(--text-primary); }
.callout--warn { background: var(--bg-callout-warn); border-color: rgba(234,179,8,0.25); color: var(--text-primary); }
.callout--danger { background: var(--bg-callout-danger); border-color: rgba(239,68,68,0.2); color: var(--text-primary); }

/* ============================================
   HERO
   ============================================ */
.section-hero {
  background: var(--brand-gradient);
  border-radius: var(--radius-lg);
  padding: 48px 48px 52px;
  margin-bottom: 40px;
  color: white;
  position: relative;
  overflow: hidden;
}
.section-hero::before {
  content: '';
  position: absolute;
  top: -60px; right: -60px;
  width: 300px; height: 300px;
  background: rgba(255,255,255,0.05);
  border-radius: 50%;
}
.section-hero::after {
  content: '';
  position: absolute;
  bottom: -80px; left: -40px;
  width: 240px; height: 240px;
  background: rgba(255,255,255,0.04);
  border-radius: 50%;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  background: rgba(255,255,255,0.18);
  color: white;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 18px;
  letter-spacing: 0.3px;
  border: 1px solid rgba(255,255,255,0.2);
}
.hero-title {
  font-size: 38px;
  font-weight: 800;
  letter-spacing: -0.8px;
  margin-bottom: 14px;
  line-height: 1.15;
  color: white;
  border-bottom: none;
  padding-bottom: 0;
}
.hero-subtitle {
  font-size: 16px;
  color: rgba(255,255,255,0.85);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 28px;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: white;
  color: var(--brand-primary);
  font-weight: 600;
  font-size: 14px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  cursor: pointer;
  text-decoration: none;
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); text-decoration: none; }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.15);
  color: white;
  border: 1px solid rgba(255,255,255,0.3);
  font-weight: 500;
  font-size: 14px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  cursor: pointer;
  text-decoration: none;
}
.btn-secondary:hover { background: rgba(255,255,255,0.25); text-decoration: none; }

/* ============================================
   CARDS GRID
   ============================================ */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
  margin-bottom: 40px;
}
.doc-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: flex-start;
  gap: 16px;
  position: relative;
}
.doc-card:hover {
  border-color: var(--brand-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.card-icon {
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.card-icon--blue { background: #EEF2FF; color: #4F46E5; }
.card-icon--purple { background: #F5F3FF; color: #7C3AED; }
.card-icon--green { background: #F0FDF4; color: #16A34A; }
.card-icon--orange { background: #FFF7ED; color: #EA580C; }
.card-icon--teal { background: #F0FDFA; color: #0D9488; }
.card-icon--indigo { background: #EEF2FF; color: #4338CA; }
.card-icon--rose { background: #FFF1F2; color: #E11D48; }
.card-icon--amber { background: #FFFBEB; color: #D97706; }
.card-icon--slate { background: #F8FAFC; color: #475569; }
[data-theme="dark"] .card-icon--blue { background: #1E2749; color: #818CF8; }
[data-theme="dark"] .card-icon--purple { background: #2D1B69; color: #A78BFA; }
[data-theme="dark"] .card-icon--green { background: #052E16; color: #4ADE80; }
[data-theme="dark"] .card-icon--orange { background: #431407; color: #FB923C; }
[data-theme="dark"] .card-icon--teal { background: #042F2E; color: #2DD4BF; }
[data-theme="dark"] .card-icon--indigo { background: #1E2749; color: #818CF8; }
[data-theme="dark"] .card-icon--rose { background: #4C0519; color: #FB7185; }
[data-theme="dark"] .card-icon--amber { background: #292201; color: #FCD34D; }
[data-theme="dark"] .card-icon--slate { background: #1E293B; color: #94A3B8; }

.card-body { flex: 1; min-width: 0; }
.card-body h3 { font-size: 14px; font-weight: 600; margin: 0 0 6px; color: var(--text-primary); }
.card-body p { font-size: 13px; color: var(--text-secondary); margin: 0; line-height: 1.5; }
.card-arrow { color: var(--text-muted); font-size: 18px; flex-shrink: 0; transition: transform var(--transition); }
.doc-card:hover .card-arrow { transform: translateX(4px); color: var(--brand-primary); }

/* ============================================
   QUICK LINKS
   ============================================ */
.quick-links { margin-bottom: 40px; }
.quick-links h2 { margin-top: 0; }
.quick-links-grid { display: flex; flex-wrap: wrap; gap: 10px; }
.quick-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
  font-weight: 450;
}
.quick-link:hover {
  border-color: var(--brand-primary);
  color: var(--brand-primary);
  background: var(--nav-item-active);
  text-decoration: none;
}

/* ============================================
   FEATURE LIST
   ============================================ */
.feature-list { display: flex; flex-direction: column; gap: 10px; margin-bottom: 28px; }
.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}
.feature-badge {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 2px 7px;
  border-radius: 10px;
  background: var(--brand-primary);
  color: white;
  flex-shrink: 0;
  margin-top: 1px;
}

/* ============================================
   ENTERPRISE PLATFORM ARCHITECTURE
   ============================================ */
.architecture-header {
  position: relative;
  padding: 30px 32px;
  margin-bottom: 22px;
  overflow: hidden;
  border: 1px solid rgba(79, 70, 229, 0.18);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 95% 0%, rgba(124, 58, 237, 0.14), transparent 34%),
    linear-gradient(145deg, var(--bg-card) 0%, var(--bg-callout-info) 100%);
}
.architecture-header::after {
  content: '';
  position: absolute;
  width: 220px;
  height: 220px;
  right: -110px;
  bottom: -150px;
  border: 28px solid rgba(79, 70, 229, 0.06);
  border-radius: 50%;
  pointer-events: none;
}
.architecture-header h1 { margin-bottom: 12px; }
.architecture-header .section-intro { max-width: 780px; margin-bottom: 18px; }
.architecture-principles { display: flex; flex-wrap: wrap; gap: 8px; position: relative; z-index: 1; }
.architecture-principles span {
  padding: 5px 10px;
  border: 1px solid rgba(79, 70, 229, 0.22);
  border-radius: 999px;
  background: var(--bg-card);
  color: var(--brand-primary);
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.2px;
}
.architecture-note { margin-bottom: 30px; }
.architecture-map {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 18px 0 38px;
  padding: 20px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: var(--bg-page);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.35);
}
.architecture-layer {
  padding: 20px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  box-shadow: var(--shadow-sm);
}
.architecture-layer--channels { border-top: 3px solid #0EA5E9; }
.architecture-layer--access { border-top: 3px solid #8B5CF6; }
.architecture-layer--operations { border-top: 3px solid var(--brand-primary); }
.architecture-layer--shared { border-top: 3px solid #14B8A6; }
.architecture-layer--foundation { border-top: 3px solid #F59E0B; }
.architecture-layer-heading { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.architecture-layer-title { display: block; margin: 0 0 2px; font-size: 15px; color: var(--text-primary); }
.architecture-layer-heading p { margin: 0; font-size: 12px; line-height: 1.45; color: var(--text-muted); }
.architecture-layer-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  border-radius: 9px;
  background: var(--brand-gradient);
  color: #fff;
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.5px;
}
.architecture-node-grid { display: grid; gap: 10px; }
.architecture-node-grid--four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.architecture-node-grid--three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.architecture-node {
  min-width: 0;
  padding: 13px 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-page);
}
.architecture-node--accent { background: linear-gradient(145deg, var(--bg-card), var(--bg-callout-info)); }
.architecture-node strong { display: block; margin-bottom: 4px; color: var(--text-primary); font-size: 12px; line-height: 1.4; }
.architecture-node span { display: block; color: var(--text-secondary); font-size: 11px; line-height: 1.45; }
.architecture-connector {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  color: var(--text-muted);
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.4px;
  text-transform: uppercase;
}
.architecture-connector::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: linear-gradient(var(--brand-primary), var(--brand-accent));
  transform: translateX(-50%);
}
.architecture-connector::after {
  content: '';
  position: absolute;
  bottom: 7px;
  left: 50%;
  width: 7px;
  height: 7px;
  border-right: 2px solid var(--brand-accent);
  border-bottom: 2px solid var(--brand-accent);
  transform: translateX(-50%) rotate(45deg);
}
.architecture-connector span { position: relative; z-index: 1; padding: 3px 9px; background: var(--bg-page); }
.architecture-control-strip { display: flex; flex-wrap: wrap; gap: 8px; }
.architecture-control-strip span {
  flex: 1 1 150px;
  padding: 9px 11px;
  border: 1px solid rgba(124, 58, 237, 0.2);
  border-radius: var(--radius-sm);
  background: var(--bg-callout-info);
  color: var(--text-primary);
  font-size: 11px;
  font-weight: 600;
  text-align: center;
}
.architecture-control-strip--shared span { border-color: rgba(20, 184, 166, 0.22); background: var(--bg-callout-tip); }
.architecture-foundation-grid { display: grid; grid-template-columns: 1fr 1.25fr; gap: 12px; }
.architecture-foundation-card {
  padding: 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-page);
}
.architecture-foundation-card strong { display: block; margin: 6px 0; font-size: 13px; color: var(--text-primary); }
.architecture-foundation-card p { margin: 0; font-size: 11px; line-height: 1.55; }
.architecture-card-label { color: #B45309; font-size: 9px; font-weight: 750; letter-spacing: 0.5px; text-transform: uppercase; }
[data-theme="dark"] .architecture-card-label { color: #FBBF24; }
.architecture-integration-list { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.architecture-integration-list span {
  padding: 5px 8px;
  border: 1px solid var(--border-color);
  border-radius: 999px;
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 10px;
}
.architecture-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr auto 1fr;
  align-items: stretch;
  gap: 8px;
  margin: 18px 0 36px;
}
.architecture-flow-step {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  box-shadow: var(--shadow-sm);
}
.architecture-flow-step > span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  margin-bottom: 8px;
  border-radius: 50%;
  background: var(--brand-primary);
  color: white;
  font-size: 10px;
  font-weight: 700;
}
.architecture-flow-step strong { color: var(--text-primary); font-size: 12px; }
.architecture-flow-step small { margin-top: 4px; color: var(--text-secondary); font-size: 10px; line-height: 1.45; }
.architecture-flow-arrow { display: flex; align-items: center; color: var(--brand-primary); font-size: 18px; }
.architecture-checkpoints { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin: 18px 0 36px; }
.architecture-checkpoints article {
  display: flex;
  gap: 12px;
  padding: 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-card);
}
.architecture-checkpoint-title { display: block; margin: 0 0 4px; color: var(--text-primary); font-size: 13px; }
.architecture-checkpoints p { margin: 0; font-size: 12px; line-height: 1.55; }
.checkpoint-mark {
  width: 10px;
  height: 10px;
  margin-top: 5px;
  flex: 0 0 10px;
  border: 2px solid var(--brand-primary);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(79,70,229,0.1);
}
.architecture-responsibility-table td:first-child { width: 22%; white-space: nowrap; }

/* ============================================
   STEPS
   ============================================ */
.steps { counter-reset: step; margin-bottom: 28px; }
.step {
  display: flex;
  gap: 18px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-color);
  counter-increment: step;
}
.step:last-child { border-bottom: none; }
.step-num {
  width: 32px; height: 32px;
  background: var(--brand-gradient);
  color: white;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700;
  flex-shrink: 0;
}
.step-content { flex: 1; }
.step-content h4 { margin: 0 0 6px; color: var(--text-primary); font-size: 15px; }
.step-content p { margin: 0; }

/* ============================================
   SEARCH RESULTS
   ============================================ */
.search-results {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 28px;
  overflow: hidden;
}
.search-results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}
.search-results-header button {
  background: none;
  border: none;
  color: var(--brand-primary);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
}
.search-result-item {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  transition: background var(--transition);
}
.search-result-item:last-child { border-bottom: none; }
.search-result-item:hover { background: var(--nav-item-hover); }
.search-result-title { font-size: 14px; font-weight: 600; color: var(--text-primary); margin-bottom: 4px; }
.search-result-excerpt { font-size: 13px; color: var(--text-muted); line-height: 1.5; }
.search-result-section { font-size: 11px; color: var(--brand-primary); font-weight: 500; margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.4px; }
.search-highlight { background: rgba(79,70,229,0.15); color: var(--brand-primary); border-radius: 2px; padding: 0 2px; }

/* ============================================
   PAGE NAV (right sidebar)
   ============================================ */
.page-nav {
  position: fixed;
  top: var(--topbar-height);
  right: 0;
  width: var(--page-nav-width);
  padding: 32px 20px;
  overflow-y: auto;
  max-height: calc(100vh - var(--topbar-height));
}
.page-nav-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  margin-bottom: 12px;
}
#pageNavList { list-style: none; padding: 0; }
#pageNavList li { margin-bottom: 4px; }
#pageNavList a {
  display: block;
  font-size: 12.5px;
  color: var(--text-muted);
  padding: 4px 8px;
  border-left: 2px solid transparent;
  transition: all var(--transition);
  line-height: 1.4;
}
#pageNavList a:hover { color: var(--text-primary); border-left-color: var(--border-color); text-decoration: none; }
#pageNavList a.active { color: var(--brand-primary); border-left-color: var(--brand-primary); font-weight: 500; }
#pageNavList li.indent a { padding-left: 18px; font-size: 12px; }

/* ============================================
   CONTACT CARDS
   ============================================ */
.contact-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 20px; margin-bottom: 28px; }
.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
}
.contact-icon { font-size: 32px; margin-bottom: 14px; }
.contact-card h3 { font-size: 16px; margin-bottom: 8px; }
.contact-card p { font-size: 13.5px; color: var(--text-muted); margin-bottom: 16px; }
.contact-card ul { text-align: left; padding-left: 18px; }
.contact-card .btn-primary { justify-content: center; margin-top: 12px; background: var(--brand-primary); color: white; }
.contact-card .btn-secondary { justify-content: center; background: var(--bg-page); color: var(--text-primary); border: 1px solid var(--border-color); }

/* ============================================
   RELEASE NOTES
   ============================================ */
.release { display: flex; gap: 20px; margin-bottom: 28px; }
.release-badge {
  background: var(--brand-gradient);
  color: white;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 12px;
  height: fit-content;
  flex-shrink: 0;
  margin-top: 2px;
}
.release-content { flex: 1; }
.release-date { font-size: 12px; color: var(--text-muted); margin-bottom: 4px; }
.release-content h3 { font-size: 16px; margin-bottom: 10px; }
.release-content ul { padding-left: 18px; }
.release-content li { font-size: 14px; margin-bottom: 4px; }

/* ============================================
   OVERLAY
   ============================================ */
.overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 90;
  backdrop-filter: blur(4px);
}
.overlay.active { display: block; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1360px) {
  .page-nav { display: none !important; }
  .content { max-width: 100%; }
}

@media (max-width: 900px) {
  .layout { margin-left: 0; }
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); box-shadow: var(--shadow-lg); }
  .sidebar-close { display: flex; }
  .menu-toggle { display: flex; }
  .content { padding: 28px 20px; }
  .section-hero { padding: 32px 24px; }
  .hero-title { font-size: 28px; }
  .cards-grid { grid-template-columns: 1fr; }
  .architecture-node-grid--four, .architecture-node-grid--three { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .architecture-flow { grid-template-columns: 1fr; }
  .architecture-flow-arrow { justify-content: center; transform: rotate(90deg); min-height: 20px; }
}

@media (max-width: 600px) {
  .topbar { padding: 0 16px; }
  .content { padding: 20px 16px; }
  .hero-title { font-size: 24px; }
  .hero-actions { flex-direction: column; }
  .contact-cards { grid-template-columns: 1fr; }
  .search-kbd { display: none; }
  .architecture-header { padding: 24px 20px; }
  .architecture-map { padding: 12px; }
  .architecture-layer { padding: 16px; }
  .architecture-node-grid--four, .architecture-node-grid--three { grid-template-columns: 1fr; }
  .architecture-foundation-grid, .architecture-checkpoints { grid-template-columns: 1fr; }
  .architecture-control-strip { flex-direction: column; }
  .architecture-control-strip span { flex-basis: auto; }
  .architecture-responsibility-table,
  .architecture-responsibility-table tbody,
  .architecture-responsibility-table tr,
  .architecture-responsibility-table td { display: block; width: 100%; }
  .architecture-responsibility-table thead { display: none; }
  .architecture-responsibility-table { border: 0; background: transparent; }
  .architecture-responsibility-table tr {
    margin-bottom: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-card);
  }
  .architecture-responsibility-table td,
  .architecture-responsibility-table td:first-child {
    display: grid;
    grid-template-columns: 106px minmax(0, 1fr);
    gap: 12px;
    padding: 12px 14px;
    border: 0;
    border-bottom: 1px solid var(--border-color);
    white-space: normal;
  }
  .architecture-responsibility-table td:last-child { border-bottom: 0; }
  .architecture-responsibility-table td::before {
    content: attr(data-label);
    color: var(--text-muted);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.45px;
    text-transform: uppercase;
  }
}

/* ============================================
   PRINT
   ============================================ */
@media print {
  .sidebar, .topbar, .page-nav { display: none !important; }
  .layout { margin-left: 0; }
  .doc-section { display: block !important; break-inside: avoid; }
}

/* ============================================
   DYNAMIC SECTION ELEMENTS
   ============================================ */
.doc-origin {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--brand-primary);
  margin-bottom: 10px;
  opacity: 0.8;
}
.section-footer {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  font-size: 13px;
  color: var(--text-muted);
}
.section-body { line-height: 1.75; }
.section-body h2 { margin-top: 40px; }
.section-body h3 { margin-top: 28px; color: var(--text-primary); scroll-margin-top: 72px; }
.section-body h4 { margin-top: 18px; scroll-margin-top: 72px; }
.section-body h2 { scroll-margin-top: 72px; }
.section-body p + p { margin-top: 0; }
.section-body ul { margin-bottom: 16px; }
.section-body ul li { margin-bottom: 5px; color: var(--text-secondary); }

/* Tag pills for tables */
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
  background: var(--bg-code);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

/* Divider */
hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 32px 0;
}

/* ============================================
   AUTH OVERLAY (Login Gate)
   ============================================ */
.auth-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg-page);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  transition: opacity 0.3s ease;
}
.auth-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}
.auth-card {
  background: var(--bg-content);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px 44px;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
  animation: authSlideUp 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}
@keyframes authSlideUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
.auth-logo { display: flex; align-items: center; gap: 14px; margin-bottom: 28px; }
.auth-logo-name { font-size: 18px; font-weight: 700; color: var(--text-primary); letter-spacing: -0.3px; }
.auth-logo-sub { font-size: 12px; color: var(--text-muted); font-weight: 500; }
.auth-title { font-size: 22px; font-weight: 700; color: var(--text-primary); margin-bottom: 6px; border-bottom: none; padding-bottom: 0; }
.auth-desc { font-size: 14px; color: var(--text-muted); margin-bottom: 24px; line-height: 1.6; }
.auth-error {
  background: #FEF2F2;
  border: 1px solid rgba(239,68,68,0.3);
  border-radius: var(--radius-sm);
  color: #DC2626;
  font-size: 13.5px;
  padding: 10px 14px;
  margin-bottom: 16px;
}
[data-theme="dark"] .auth-error { background: #2D0E0E; color: #F87171; }
.auth-form { display: flex; flex-direction: column; gap: 16px; }
.auth-field { display: flex; flex-direction: column; gap: 6px; }
.auth-field label { font-size: 13px; font-weight: 600; color: var(--text-secondary); }
.auth-field input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-page);
  color: var(--text-primary);
  font-size: 14px;
  font-family: var(--font-sans);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.auth-field input:focus { border-color: var(--brand-primary); box-shadow: 0 0 0 3px rgba(79,70,229,0.12); }
.auth-field input::placeholder { color: var(--text-muted); }
.auth-password-wrap { position: relative; }
.auth-password-wrap input { padding-right: 42px; }
.auth-toggle-pw {
  position: absolute; right: 10px; top: 50%; transform: translateY(-50%);
  background: none; border: none; color: var(--text-muted); cursor: pointer;
  padding: 4px; display: flex; align-items: center;
}
.auth-toggle-pw:hover { color: var(--text-primary); }
.auth-submit {
  width: 100%; padding: 11px 20px;
  background: var(--brand-gradient);
  color: white; border: none; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 600; font-family: var(--font-sans);
  cursor: pointer; display: flex; align-items: center; justify-content: center; gap: 10px;
  margin-top: 4px; transition: opacity var(--transition), transform var(--transition);
}
.auth-submit:hover { opacity: 0.92; transform: translateY(-1px); }
.auth-submit:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.auth-spinner {
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.35);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.auth-footer { margin-top: 22px; font-size: 12.5px; color: var(--text-muted); text-align: center; }
.auth-footer a { color: var(--brand-primary); }

/* ============================================
   USER MENU (Topbar Avatar)
   ============================================ */
.user-menu { position: relative; }
.user-avatar-btn {
  display: flex; align-items: center; gap: 8px;
  background: none; border: 1px solid var(--border-color);
  border-radius: 24px; padding: 5px 12px 5px 5px;
  cursor: pointer; color: var(--text-secondary);
  font-family: var(--font-sans); font-size: 13px; font-weight: 500;
  transition: all var(--transition);
}
.user-avatar-btn:hover { border-color: var(--brand-primary); color: var(--text-primary); background: var(--nav-item-active); }
.user-initials {
  width: 28px; height: 28px; background: var(--brand-gradient); color: white;
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 700; flex-shrink: 0; letter-spacing: 0.5px;
}
.user-name { max-width: 120px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.user-dropdown {
  position: absolute; top: calc(100% + 8px); right: 0; min-width: 220px;
  background: var(--bg-content); border: 1px solid var(--border-color);
  border-radius: var(--radius-md); box-shadow: var(--shadow-lg);
  padding: 10px; z-index: 200; display: none;
  animation: dropdownIn 0.15s ease;
}
@keyframes dropdownIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.user-dropdown.open { display: block; }
.user-dropdown-header { display: flex; flex-direction: column; gap: 2px; padding: 4px 6px 10px; }
.user-dropdown-header span:first-child { font-size: 14px; font-weight: 600; color: var(--text-primary); }
.user-dropdown-email { font-size: 12px !important; color: var(--text-muted) !important; font-weight: 400 !important; }
.user-dropdown-item {
  display: flex; align-items: center; gap: 8px; width: 100%;
  padding: 8px 10px; background: none; border: none; border-radius: var(--radius-sm);
  font-size: 13.5px; color: var(--text-secondary); font-family: var(--font-sans);
  cursor: pointer; text-align: left; transition: all var(--transition);
}
.user-dropdown-item:hover { background: #FEF2F2; color: #DC2626; }
[data-theme="dark"] .user-dropdown-item:hover { background: #2D0E0E; color: #F87171; }
@media (max-width: 600px) {
  .user-name { display: none; }
  .user-avatar-btn { padding: 5px; border-radius: 50%; }
}

/* ============================================
   GUIDE METADATA CARD
   ============================================ */
.guide-meta-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  margin: 24px 0 32px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--brand-primary);
}

.meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.meta-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--brand-primary);
}

.meta-val {
  font-size: 13.5px;
  color: var(--text-primary);
  line-height: 1.5;
  font-weight: 450;
}

/* ============================================
   STEP CARDS / SEQUENCES
   ============================================ */
.steps-container {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 24px 0 32px;
}

.step-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

.step-card:hover {
  border-color: var(--brand-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.step-card-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--brand-gradient);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
}

.step-card-content {
  flex: 1;
  min-width: 0;
}

.step-card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 4px !important;
  line-height: 1.3;
}

.step-card-desc {
  font-size: 13.5px;
  color: var(--text-secondary);
  margin: 0 !important;
  line-height: 1.5;
}

/* ============================================
   NAVIGATION CALLOUT / BADGE
   ============================================ */
.callout-nav {
  background: var(--bg-callout-info);
  border-left: 4px solid var(--brand-primary);

}

.nav-path {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--brand-primary);
  background: rgba(79, 70, 229, 0.08);
  padding: 2px 8px;
  border-radius: 4px;
  display: inline-block;
  margin-top: 4px;
}

/* ============================================
   TOC GRID
   ============================================ */
.toc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
  margin: 20px 0 32px;
}

.toc-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 13.5px;
  color: var(--text-primary);
  font-weight: 500;
}

.toc-page {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 600;
  background: var(--bg-page);
  padding: 2px 6px;
  border-radius: 4px;
}