/* ==========================================================================
   魔戒机场 (Mojie Cloud) - Product Documentation Design System
   Palette: White, Graphite, Muted Teal
   Typography: Crisp Sans-serif with Monospace used sparingly
   Design Metaphor: High-Grade Developer & Enterprise Product Documentation
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* Canvas & White Foundations */
  --bg-canvas: #FFFFFF;
  --bg-page: #F8FAFC;
  --bg-surface: #FFFFFF;
  --bg-subtle: #F1F5F9;
  --bg-muted: #E2E8F0;
  
  /* Graphite Text & Neutral Hierarchy */
  --graphite-950: #090D16;
  --graphite-900: #0F172A;
  --graphite-800: #1E293B;
  --graphite-700: #334155;
  --graphite-600: #475569;
  --graphite-500: #64748B;
  --graphite-400: #94A3B8;
  --graphite-300: #CBD5E1;
  --graphite-200: #E2E8F0;
  --graphite-100: #F1F5F9;
  --graphite-50:  #F8FAFC;

  /* Muted Teal Accent (Calm, Technical, Precise - Never Neon) */
  --teal-900: #134E4A;
  --teal-800: #115E59;
  --teal-700: #0F766E;
  --teal-600: #0D9488;
  --teal-500: #14B8A6;
  --teal-400: #2DD4BF;
  --teal-300: #5EEAD4;
  --teal-200: #99F6E4;
  --teal-100: #CCFBF1;
  --teal-50:  #F0FDFA;

  /* Semantic Borders & Dividers */
  --border-subtle: #E2E8F0;
  --border-light: #EDF2F7;
  --border-strong: #CBD5E1;
  --border-teal: #CCFBF1;
  --border-teal-focus: #0D9488;

  /* Shadows (Subtle, Layered, Tactile) */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --shadow-modal: 0 20px 25px -5px rgba(15, 23, 42, 0.12), 0 8px 10px -6px rgba(15, 23, 42, 0.08);

  /* Typography Stack */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Layout Constants */
  --header-height: 64px;
  --sidebar-width: 270px;
  --content-max-width: 1400px;
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   Base & Reset
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 15px;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--bg-page);
  color: var(--graphite-700);
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--graphite-700);
  line-height: 1.65;
  overflow-x: hidden;
}

a {
  color: var(--teal-700);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--teal-800);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

code, kbd, samp, pre {
  font-family: var(--font-mono);
  font-size: 0.88em;
}

code {
  background: var(--graphite-100);
  color: var(--graphite-800);
  padding: 0.18em 0.45em;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-subtle);
}

kbd {
  background: var(--bg-surface);
  border: 1px solid var(--graphite-300);
  box-shadow: 0 1px 0 var(--graphite-300);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-xs);
  font-size: 0.8em;
  color: var(--graphite-600);
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   Site Header / Top Navigation (Docs Navigation)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  transition: border-color var(--transition-fast);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--graphite-900);
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--graphite-900);
  color: var(--teal-300);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-xs);
}

.brand-tag {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: var(--radius-xs);
  background: var(--teal-50);
  color: var(--teal-800);
  border: 1px solid var(--border-teal);
  letter-spacing: 0.02em;
}

.header-nav {
  display: none;
}

@media (min-width: 1024px) {
  .header-nav {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-left: 20px;
  }
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--graphite-600);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--graphite-900);
  background: var(--graphite-100);
}

.nav-link.active {
  color: var(--teal-700);
  font-weight: 600;
}

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

.status-badge {
  display: none;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--graphite-600);
  padding: 6px 12px;
  border-radius: var(--radius-full);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
}

@media (min-width: 1200px) {
  .status-badge {
    display: flex;
  }
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--teal-600);
  box-shadow: 0 0 0 2px var(--teal-100);
  animation: pulse-dot 2.5s infinite;
}

@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.15); opacity: 0.75; }
}

.search-trigger {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--graphite-500);
  background: var(--graphite-50);
  border: 1px solid var(--border-subtle);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.search-trigger:hover {
  background: var(--bg-surface);
  border-color: var(--graphite-300);
  color: var(--graphite-800);
}

.search-trigger kbd {
  font-size: 0.72rem;
}

/* Primary Action Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.88rem;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: var(--teal-700);
  color: #FFFFFF;
  border: 1px solid var(--teal-800);
  box-shadow: var(--shadow-xs);
}

.btn-primary:hover {
  background: var(--teal-800);
  color: #FFFFFF;
  box-shadow: var(--shadow-sm);
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--graphite-700);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-xs);
}

.btn-secondary:hover {
  background: var(--graphite-50);
  color: var(--graphite-900);
  border-color: var(--graphite-300);
}

.btn-outline-teal {
  background: var(--teal-50);
  color: var(--teal-800);
  border: 1px solid var(--border-teal);
}

.btn-outline-teal:hover {
  background: var(--teal-100);
  color: var(--teal-900);
}

.btn-lg {
  padding: 10px 22px;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
}

.btn-sm {
  padding: 5px 10px;
  font-size: 0.78rem;
}

/* Mobile Toggle */
.mobile-nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  color: var(--graphite-700);
}

@media (min-width: 1024px) {
  .mobile-nav-toggle {
    display: none;
  }
}

/* ==========================================================================
   Mobile Navigation Drawer & Mobile Section Quick Bar
   ========================================================================== */
.mobile-drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(4px);
  z-index: 1100;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.mobile-drawer-overlay.open {
  opacity: 1;
  visibility: visible;
}

.mobile-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 320px;
  max-width: 85vw;
  background: var(--bg-surface);
  z-index: 1101;
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-modal);
}

.mobile-drawer.open {
  transform: translateX(0);
}

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

.drawer-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-xs);
  color: var(--graphite-500);
}

.drawer-body {
  padding: 20px;
  overflow-y: auto;
  flex: 1;
}

.drawer-group-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--graphite-400);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 16px 0 8px 0;
}

.drawer-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.drawer-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 12px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--graphite-700);
  border-radius: var(--radius-sm);
}

.drawer-nav-link:hover, .drawer-nav-link.active {
  background: var(--teal-50);
  color: var(--teal-800);
}

.drawer-footer {
  padding: 18px 20px;
  border-top: 1px solid var(--border-subtle);
  background: var(--graphite-50);
}

/* Mobile Quick Bar: Horizontal Sticky Chips on Mobile */
.mobile-quick-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  padding: 10px 16px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: var(--header-height);
  z-index: 900;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.mobile-quick-bar::-webkit-scrollbar {
  display: none;
}

@media (min-width: 1024px) {
  .mobile-quick-bar {
    display: none;
  }
}

.mobile-chip {
  flex-shrink: 0;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--graphite-600);
  background: var(--graphite-100);
  border: 1px solid var(--border-subtle);
  padding: 5px 12px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.mobile-chip.active {
  background: var(--teal-50);
  color: var(--teal-800);
  border-color: var(--teal-300);
  font-weight: 600;
}

/* ==========================================================================
   Documentation Main Layout: Sticky Sidebar + Main Content Stream
   ========================================================================== */
.docs-layout {
  display: block;
  padding: 32px 0 80px 0;
}

@media (min-width: 1024px) {
  .docs-layout {
    display: grid;
    grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }
}

/* Sticky In-Page Section Menu (Sidebar TOC) */
.docs-sidebar {
  display: none;
}

@media (min-width: 1024px) {
  .docs-sidebar {
    display: block;
    position: sticky;
    top: calc(var(--header-height) + 24px);
    max-height: calc(100vh - var(--header-height) - 48px);
    overflow-y: auto;
    padding-right: 14px;
    scrollbar-width: thin;
    scrollbar-color: var(--graphite-300) transparent;
  }
}

.docs-sidebar::-webkit-scrollbar {
  width: 4px;
}
.docs-sidebar::-webkit-scrollbar-thumb {
  background: var(--graphite-300);
  border-radius: 4px;
}

.sidebar-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-xs);
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-light);
}

.sidebar-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--graphite-500);
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 6px;
}

.sidebar-group {
  margin-bottom: 16px;
}

.sidebar-group:last-child {
  margin-bottom: 0;
}

.sidebar-category {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--graphite-400);
  margin-bottom: 6px;
  padding-left: 8px;
  text-transform: uppercase;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toc-item {
  position: relative;
}

.toc-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--graphite-600);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  line-height: 1.4;
}

.toc-link:hover {
  color: var(--graphite-900);
  background: var(--graphite-100);
}

.toc-link.active {
  color: var(--teal-800);
  background: var(--teal-50);
  font-weight: 600;
}

.toc-index {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--graphite-400);
  margin-right: 6px;
}

.toc-link.active .toc-index {
  color: var(--teal-600);
}

.sidebar-quick-card {
  margin-top: 16px;
  padding: 14px;
  background: var(--graphite-50);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
}

.sidebar-quick-card h4 {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--graphite-900);
  margin-bottom: 4px;
}

.sidebar-quick-card p {
  color: var(--graphite-500);
  font-size: 0.76rem;
  line-height: 1.45;
  margin-bottom: 10px;
}

/* Main Content Stream */
.docs-content {
  min-width: 0;
}

/* ==========================================================================
   Documentation Sections & Headings
   ========================================================================== */
.doc-section {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  margin-bottom: 32px;
  box-shadow: var(--shadow-xs);
  position: relative;
}

@media (max-width: 768px) {
  .doc-section {
    padding: 24px 18px;
    margin-bottom: 20px;
    border-radius: var(--radius-md);
  }
}

.doc-section-header {
  margin-bottom: 28px;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 16px;
}

.section-label-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.section-mono-id {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--teal-700);
  background: var(--teal-50);
  border: 1px solid var(--border-teal);
  padding: 2px 8px;
  border-radius: var(--radius-xs);
}

.section-updated {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--graphite-400);
}

.doc-section-title {
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--graphite-900);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.doc-section-desc {
  font-size: 0.95rem;
  color: var(--graphite-600);
  margin-top: 6px;
  line-height: 1.6;
}

/* ==========================================================================
   Section 0: Practical Documentation Hero
   ========================================================================== */
.hero-section {
  background: #FFFFFF;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-bottom: 32px;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

@media (max-width: 768px) {
  .hero-section {
    padding: 24px 18px;
  }
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: center;
}

@media (min-width: 1080px) {
  .hero-grid {
    grid-template-columns: 1.25fr 1fr;
    gap: 40px;
  }
}

.hero-meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--graphite-700);
  background: var(--graphite-100);
  border: 1px solid var(--border-subtle);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 18px;
}

.hero-meta-badge .badge-tag-teal {
  color: var(--teal-800);
  font-weight: 600;
  background: var(--teal-100);
  padding: 1px 6px;
  border-radius: var(--radius-xs);
}

.hero-title {
  font-size: 2.3rem;
  font-weight: 700;
  color: var(--graphite-950);
  line-height: 1.25;
  letter-spacing: -0.03em;
  margin-bottom: 14px;
}

@media (max-width: 640px) {
  .hero-title {
    font-size: 1.75rem;
  }
}

.hero-title .brand-accent {
  color: var(--teal-700);
  position: relative;
}

.hero-lead {
  font-size: 1.05rem;
  color: var(--graphite-600);
  line-height: 1.68;
  margin-bottom: 24px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.hero-spec-pills {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 12px;
  padding-top: 20px;
  border-top: 1px solid var(--border-light);
}

.spec-pill {
  display: flex;
  flex-direction: column;
}

.spec-pill-value {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--graphite-900);
}

.spec-pill-label {
  font-size: 0.75rem;
  color: var(--graphite-500);
  margin-top: 2px;
}

/* Quick Snippet Box in Hero (Practical Documentation Feature) */
.hero-code-snippet {
  background: var(--graphite-900);
  border-radius: var(--radius-md);
  border: 1px solid var(--graphite-800);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.snippet-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: #0B1120;
  border-bottom: 1px solid var(--graphite-800);
}

.snippet-tabs {
  display: flex;
  align-items: center;
  gap: 8px;
}

.snippet-tab-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--graphite-400);
  padding: 4px 8px;
  border-radius: var(--radius-xs);
  transition: all var(--transition-fast);
}

.snippet-tab-btn.active {
  color: #FFFFFF;
  background: var(--graphite-800);
}

.copy-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--graphite-300);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  transition: all var(--transition-fast);
}

.copy-btn:hover {
  background: rgba(255, 255, 255, 0.18);
  color: #FFFFFF;
}

.snippet-code-area {
  padding: 16px;
  color: #E2E8F0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  overflow-x: auto;
}

.snippet-code-area .comment { color: #64748B; }
.snippet-code-area .command { color: #5EEAD4; }
.snippet-code-area .flag { color: #FCD34D; }
.snippet-code-area .url { color: #93C5FD; }

/* Real-Time Telemetry Board in Hero */
.telemetry-board {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-top: 14px;
  padding: 14px 16px;
}

.telemetry-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.telemetry-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--graphite-700);
  display: flex;
  align-items: center;
  gap: 6px;
}

.telemetry-refresh {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--teal-700);
  display: flex;
  align-items: center;
  gap: 4px;
}

.telemetry-refresh:hover {
  color: var(--teal-800);
  text-decoration: underline;
}

.telemetry-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.telemetry-node {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  background: var(--graphite-50);
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-light);
}

.telemetry-flag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--graphite-800);
  background: #FFFFFF;
  border: 1px solid var(--border-subtle);
  padding: 1px 5px;
  border-radius: 3px;
  margin-right: 6px;
}

.telemetry-name {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--graphite-700);
}

.telemetry-ping {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--teal-700);
  background: var(--teal-50);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
}

/* ==========================================================================
   Helpful Feature Diagrams Built with HTML/CSS (Pure CSS / Responsive)
   ========================================================================== */
.diagram-container {
  background: var(--graphite-50);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 20px 0;
  position: relative;
  overflow: hidden;
}

.diagram-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.diagram-caption {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--graphite-600);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.diagram-legend {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--graphite-500);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 5px;
}

.legend-swatch {
  width: 10px;
  height: 10px;
  border-radius: 2px;
}
.legend-swatch.teal { background: var(--teal-600); }
.legend-swatch.graphite { background: var(--graphite-400); }
.legend-swatch.slate { background: var(--graphite-800); }

/* Diagram 1: Multi-Hop Topology Diagram */
.topology-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  position: relative;
}

@media (min-width: 900px) {
  .topology-flow {
    grid-template-columns: 1fr auto 1.3fr auto 1fr;
    align-items: center;
  }
}

.topology-node-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-xs);
  transition: all var(--transition-fast);
}

.topology-node-box:hover {
  border-color: var(--teal-400);
  box-shadow: var(--shadow-sm);
}

.topology-node-box.highlight {
  border-color: var(--teal-500);
  background: var(--teal-50);
}

.topo-node-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--teal-800);
  background: #FFFFFF;
  border: 1px solid var(--border-teal);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
  display: inline-block;
  margin-bottom: 8px;
}

.topo-node-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--graphite-900);
  margin-bottom: 6px;
}

.topo-node-specs {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--graphite-500);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.topo-connector {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px 0;
}

@media (min-width: 900px) {
  .topo-connector {
    flex-direction: column;
    padding: 0 8px;
  }
}

.connector-line {
  height: 2px;
  width: 32px;
  background: var(--graphite-300);
  position: relative;
}

@media (max-width: 899px) {
  .connector-line {
    width: 2px;
    height: 20px;
  }
}

.connector-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--teal-700);
  background: var(--teal-50);
  border: 1px solid var(--border-teal);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
  margin: 4px 0;
  white-space: nowrap;
}

/* Diagram 2: Split-Tunneling & AI Filter Map */
.split-routing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 768px) {
  .split-routing-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.route-branch {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 18px;
}

.route-branch.direct {
  border-top: 3px solid var(--graphite-400);
}

.route-branch.proxy {
  border-top: 3px solid var(--teal-600);
  background: #FCFDFD;
}

.branch-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.branch-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--graphite-900);
}

.branch-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: var(--radius-xs);
}

.branch-badge.direct {
  background: var(--graphite-100);
  color: var(--graphite-600);
}

.branch-badge.proxy {
  background: var(--teal-50);
  color: var(--teal-800);
  border: 1px solid var(--border-teal);
}

.branch-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.85rem;
}

.branch-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  background: var(--graphite-50);
  border-radius: var(--radius-xs);
}

.service-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--graphite-500);
}

/* ==========================================================================
   Documentation Grid Cards (Advantages & Nodes)
   ========================================================================== */
.docs-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.docs-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px;
  transition: all var(--transition-fast);
}

.docs-card:hover {
  border-color: var(--teal-400);
  box-shadow: var(--shadow-sm);
}

.card-mono-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--teal-700);
  background: var(--teal-50);
  border: 1px solid var(--border-teal);
  padding: 2px 8px;
  border-radius: var(--radius-xs);
  display: inline-block;
  margin-bottom: 12px;
}

.docs-card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--graphite-900);
  margin-bottom: 8px;
  line-height: 1.35;
}

.docs-card-body {
  font-size: 0.88rem;
  color: var(--graphite-600);
  line-height: 1.6;
}

/* Node Spec Cards */
.node-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.node-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.node-country {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 1rem;
  color: var(--graphite-900);
}

.country-code-pill {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--graphite-800);
  background: var(--graphite-100);
  border: 1px solid var(--border-subtle);
  padding: 2px 6px;
  border-radius: 4px;
}

.node-latency-pill {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--teal-700);
  background: var(--teal-50);
  border: 1px solid var(--border-teal);
  padding: 2px 8px;
  border-radius: var(--radius-xs);
}

.node-card-desc {
  font-size: 0.85rem;
  color: var(--graphite-600);
  line-height: 1.55;
  margin-bottom: 14px;
}

.node-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--border-light);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--graphite-500);
}

/* AI & Streaming Badges */
.app-chips-container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.app-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--graphite-800);
  background: var(--graphite-50);
  border: 1px solid var(--border-subtle);
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  transition: all var(--transition-fast);
}

.app-chip:hover {
  background: var(--teal-50);
  color: var(--teal-800);
  border-color: var(--border-teal);
}

/* ==========================================================================
   Easy-to-Scan Plan Matrix (Technical Pricing & Comparison Table)
   ========================================================================== */
.pricing-matrix-wrapper {
  margin-top: 24px;
}

.matrix-controls-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 20px;
  padding: 12px 18px;
  background: var(--graphite-50);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.cycle-tabs {
  display: inline-flex;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 3px;
  gap: 2px;
}

.cycle-tab-btn {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--graphite-600);
  padding: 5px 14px;
  border-radius: 4px;
  transition: all var(--transition-fast);
}

.cycle-tab-btn.active {
  background: var(--teal-700);
  color: #FFFFFF;
  font-weight: 600;
}

.matrix-tip-note {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--graphite-500);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Comparison Table */
.matrix-table-container {
  width: 100%;
  overflow-x: auto;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xs);
}

.matrix-table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.matrix-table th, .matrix-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}

.matrix-table th {
  background: var(--graphite-50);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--graphite-700);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.matrix-table th.col-featured,
.matrix-table td.col-featured {
  background: #FAFDFD;
  border-left: 2px solid var(--teal-600);
  border-right: 2px solid var(--teal-600);
}

.matrix-table th.col-featured {
  border-top: 3px solid var(--teal-600);
  background: var(--teal-50);
}

.matrix-table tr:last-child td {
  border-bottom: none;
}

.plan-col-header {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.plan-name-label {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--graphite-900);
  text-transform: none;
}

.plan-featured-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--teal-800);
  background: var(--teal-100);
  border: 1px solid var(--teal-200);
  padding: 1px 6px;
  border-radius: var(--radius-xs);
  display: inline-block;
  width: fit-content;
}

.plan-price-num {
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--graphite-950);
}

.plan-price-period {
  font-size: 0.78rem;
  font-weight: normal;
  color: var(--graphite-500);
}

.spec-category-row td {
  background: var(--graphite-100);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--graphite-600);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 8px 20px;
}

.spec-key {
  font-weight: 600;
  color: var(--graphite-800);
}

.spec-val-mono {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--graphite-700);
}

.feature-check {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--teal-700);
  font-weight: 500;
}

.feature-check svg {
  color: var(--teal-600);
  flex-shrink: 0;
}

/* Mobile Friendly Plan Cards */
.mobile-plan-cards {
  display: none;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 20px;
}

@media (max-width: 768px) {
  .matrix-table-container {
    display: none;
  }
  .mobile-plan-cards {
    display: grid;
  }
}

.mobile-plan-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-xs);
}

.mobile-plan-card.featured {
  border: 2px solid var(--teal-600);
  background: #FAFDFD;
}

.card-price-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin: 10px 0 16px 0;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
}

.mobile-spec-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.84rem;
  margin-bottom: 18px;
}

.mobile-spec-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--graphite-600);
}

.mobile-spec-list li strong {
  font-family: var(--font-mono);
  color: var(--graphite-900);
}

/* ==========================================================================
   Client Setup Guide (Tabbed Technical Documentation)
   ========================================================================== */
.client-tabs-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 10px;
  margin-bottom: 24px;
}

.client-tab-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--graphite-600);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.client-tab-btn:hover {
  color: var(--graphite-900);
  border-color: var(--graphite-300);
}

.client-tab-btn.active {
  background: var(--teal-50);
  border-color: var(--teal-400);
  color: var(--teal-800);
  font-weight: 600;
}

.client-tab-content {
  display: none;
}

.client-tab-content.active {
  display: block;
}

.setup-steps-list {
  list-style: none;
  counter-reset: setup-counter;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.setup-step-item {
  position: relative;
  padding-left: 48px;
}

.setup-step-item::before {
  counter-increment: setup-counter;
  content: counter(setup-counter);
  position: absolute;
  left: 0;
  top: 0;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-xs);
  background: var(--graphite-100);
  color: var(--graphite-800);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.88rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-subtle);
}

.step-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--graphite-900);
  margin-bottom: 6px;
}

.step-desc {
  font-size: 0.88rem;
  color: var(--graphite-600);
  line-height: 1.6;
}

.step-callout {
  margin-top: 10px;
  padding: 10px 14px;
  background: var(--graphite-50);
  border-left: 3px solid var(--teal-600);
  border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
  font-size: 0.82rem;
  color: var(--graphite-700);
}

/* ==========================================================================
   Support-Style FAQs (Knowledge Base / Helpdesk Format)
   ========================================================================== */
.faq-controls-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
  padding: 12px 16px;
  background: var(--graphite-50);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.faq-filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.faq-chip {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--graphite-600);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  transition: all var(--transition-fast);
}

.faq-chip.active {
  background: var(--teal-700);
  color: #FFFFFF;
  border-color: var(--teal-800);
  font-weight: 600;
}

.faq-expand-all-btn {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--teal-700);
  display: flex;
  align-items: center;
  gap: 4px;
}

.faq-expand-all-btn:hover {
  text-decoration: underline;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.support-faq-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.support-faq-card:hover {
  border-color: var(--graphite-300);
}

.support-faq-card.open {
  border-color: var(--teal-300);
  box-shadow: var(--shadow-xs);
}

.faq-summary-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  text-align: left;
  background: var(--bg-surface);
  color: var(--graphite-900);
  font-size: 0.98rem;
  font-weight: 600;
  gap: 16px;
}

.faq-meta-left {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
}

.faq-ticket-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--teal-800);
  background: var(--teal-50);
  border: 1px solid var(--border-teal);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
  flex-shrink: 0;
}

.faq-chevron {
  width: 18px;
  height: 18px;
  color: var(--graphite-400);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

.support-faq-card.open .faq-chevron {
  transform: rotate(180deg);
  color: var(--teal-700);
}

.faq-details-body {
  display: none;
  padding: 0 20px 20px 20px;
  color: var(--graphite-700);
  font-size: 0.9rem;
  line-height: 1.68;
  border-top: 1px dashed var(--border-light);
  margin-top: 0;
  padding-top: 16px;
}

.support-faq-card.open .faq-details-body {
  display: block;
}

.faq-solution-box {
  background: var(--graphite-50);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  margin-top: 12px;
  border-left: 3px solid var(--teal-600);
  font-size: 0.85rem;
}

.faq-footer-action {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 14px;
}

.faq-copy-btn {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--graphite-500);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  gap: 4px;
}

.faq-copy-btn:hover {
  color: var(--teal-800);
  border-color: var(--teal-300);
}

/* ==========================================================================
   Knowledge Base Articles Section
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.article-doc-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

.article-doc-card:hover {
  border-color: var(--teal-400);
  box-shadow: var(--shadow-sm);
}

.article-category-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--teal-800);
  background: var(--teal-50);
  border: 1px solid var(--border-teal);
  padding: 2px 8px;
  border-radius: var(--radius-xs);
  display: inline-block;
  margin-bottom: 12px;
  width: fit-content;
}

.article-doc-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--graphite-900);
  line-height: 1.45;
  margin-bottom: 10px;
}

.article-doc-title a {
  color: inherit;
}

.article-doc-title a:hover {
  color: var(--teal-700);
}

.article-doc-desc {
  font-size: 0.85rem;
  color: var(--graphite-600);
  line-height: 1.6;
  margin-bottom: 18px;
}

.article-doc-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--graphite-400);
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
}

/* ==========================================================================
   User Testimonials Section
   ========================================================================== */
.testimonials-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.testimonial-doc-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
}

.testimonial-author-box {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.author-avatar-badge {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-xs);
  background: var(--graphite-800);
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

.author-name {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--graphite-900);
}

.author-role-label {
  font-size: 0.75rem;
  color: var(--graphite-500);
}

.testimonial-quote {
  font-size: 0.88rem;
  color: var(--graphite-600);
  line-height: 1.65;
}

/* ==========================================================================
   Documentation Footer
   ========================================================================== */
.site-footer {
  background: var(--graphite-900);
  color: var(--graphite-400);
  padding: 60px 0 40px 0;
  border-top: 1px solid var(--graphite-800);
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 40px;
}

@media (max-width: 900px) {
  .footer-top-grid {
    grid-template-columns: 1fr 1fr;
    gap: 30px;
  }
}

@media (max-width: 580px) {
  .footer-top-grid {
    grid-template-columns: 1fr;
  }
}

.footer-brand-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.15rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 12px;
}

.footer-brand-desc {
  font-size: 0.85rem;
  line-height: 1.65;
  color: var(--graphite-400);
  max-width: 380px;
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--teal-300);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links-list a {
  color: var(--graphite-400);
  font-size: 0.85rem;
  transition: color var(--transition-fast);
}

.footer-links-list a:hover {
  color: #FFFFFF;
}

.footer-divider {
  height: 1px;
  background: var(--graphite-800);
  margin-bottom: 30px;
}

.footer-bottom-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.8rem;
}

.partner-links-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 0.78rem;
}

.partner-links-row a {
  color: var(--graphite-400);
}

.partner-links-row a:hover {
  color: var(--teal-300);
}

/* ==========================================================================
   Documentation Search Modal (Ctrl + K)
   ========================================================================== */
.search-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(4px);
  z-index: 1200;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.search-modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.search-modal-dialog {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  width: 90%;
  max-width: 580px;
  box-shadow: var(--shadow-modal);
  overflow: hidden;
  transform: translateY(-10px);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.search-modal-backdrop.open .search-modal-dialog {
  transform: translateY(0);
}

.search-input-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.search-input-field {
  flex: 1;
  border: none;
  outline: none;
  font-size: 1rem;
  color: var(--graphite-900);
  background: transparent;
}

.search-results-list {
  max-height: 340px;
  overflow-y: auto;
  padding: 12px;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.search-result-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.search-result-item:hover, .search-result-item.highlighted {
  background: var(--teal-50);
}

.result-item-title {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--graphite-900);
}

.result-item-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--teal-800);
  background: var(--teal-100);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
}

.search-modal-footer {
  padding: 10px 16px;
  background: var(--graphite-50);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--graphite-500);
}

/* Toast Notification for Clipboard Copy */
.toast-notice {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--graphite-900);
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 1500;
  transform: translateY(60px);
  opacity: 0;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
}

.toast-notice.show {
  transform: translateY(0);
  opacity: 1;
}

/* Print Styling */
@media print {
  .site-header, .docs-sidebar, .mobile-quick-bar, .search-modal-backdrop, .toast-notice {
    display: none !important;
  }
  .docs-layout {
    display: block !important;
  }
}

/* ==========================================================================
   Documentation Article & Subpage Layouts
   ========================================================================== */
.article-page-header {
  padding: 36px 0 20px 0;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 32px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--graphite-500);
  margin-bottom: 12px;
}

.breadcrumb a {
  color: var(--graphite-600);
}

.breadcrumb a:hover {
  color: var(--teal-700);
}

.article-page-title, .text-gradient-blue {
  font-size: 2rem;
  font-weight: 700;
  color: var(--graphite-950);
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}

.article-body {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-xs);
  color: var(--graphite-700);
  font-size: 0.98rem;
  line-height: 1.8;
  max-width: 900px;
  margin: 0 auto 48px auto;
}

@media (max-width: 768px) {
  .article-body {
    padding: 22px 16px;
  }
}

.article-body h2 {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--graphite-900);
  margin: 30px 0 12px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-light);
}

.article-body h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--graphite-900);
  margin: 22px 0 10px 0;
}

.article-body p {
  margin-bottom: 14px;
}

.article-body ul, .article-body ol {
  margin: 14px 0 18px 24px;
}

.article-body li {
  margin-bottom: 6px;
}

.article-body blockquote {
  border-left: 3px solid var(--teal-600);
  background: var(--teal-50);
  padding: 12px 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 18px 0;
  color: var(--teal-900);
  font-size: 0.92rem;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.88rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.article-body th, .article-body td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}

.article-body th {
  background: var(--graphite-50);
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--graphite-800);
}

.article-body tr:last-child td {
  border-bottom: none;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.82rem;
  padding-top: 20px;
}

.footer-recommended {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
}

.footer-recommended a {
  color: var(--graphite-400);
}

.footer-recommended a:hover {
  color: var(--teal-300);
}

/* Blog Index & Legacy Compatibility Classes */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.article-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

.article-card:hover {
  border-color: var(--teal-400);
  box-shadow: var(--shadow-sm);
}

.article-category {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--teal-800);
  background: var(--teal-50);
  border: 1px solid var(--border-teal);
  padding: 2px 8px;
  border-radius: var(--radius-xs);
  display: inline-block;
  margin-bottom: 12px;
  width: fit-content;
}

.article-card h3 {
  font-size: 1.08rem;
  font-weight: 600;
  color: var(--graphite-900);
  line-height: 1.45;
  margin-bottom: 10px;
}

.article-card h3 a {
  color: inherit;
}

.article-card h3 a:hover {
  color: var(--teal-700);
}

.article-excerpt {
  font-size: 0.88rem;
  color: var(--graphite-600);
  line-height: 1.6;
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--graphite-400);
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
}

.nav-menu {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}