/* ============================================================
   FanyiAPI Docs — Design System: "Aether Deep"
   Dark theme · Glass morphism · Editorial typography
   ============================================================ */

/* ----- Google Fonts ----- */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Plus+Jakarta+Sans:wght@300;400;450;500;600;700&family=JetBrains+Mono:wght@400;450;500&display=swap');

/* ============================================================
   CSS Variables — Light (default) + Dark themes
   ============================================================ */
:root {
  /* ---- Light Theme: Blue-White ---- */
  /* Background */
  --bg-root: #f4f7fb;
  --bg-base: #f8fafc;
  --bg-elevated: #ffffff;
  --bg-surface: #ffffff;
  --bg-surface-hover: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.82);
  --bg-glass-hover: rgba(255, 255, 255, 0.94);
  --header-bg: rgba(255, 255, 255, 0.8);
  --sidebar-bg: rgba(247, 249, 252, 0.6);
  --search-input-bg: rgba(241, 245, 249, 0.9);

  /* Borders */
  --border-subtle: rgba(15, 23, 42, 0.07);
  --border-default: rgba(15, 23, 42, 0.11);
  --border-hover: rgba(37, 99, 235, 0.24);
  --border-focus: rgba(59, 130, 246, 0.5);

  /* Text */
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;

  /* Accent */
  --accent: #2563eb;
  --accent-deep: #1d4ed8;
  --accent-glow: #0891b2;
  --accent-sky: #14b8a6;
  --accent-warm: #f59e0b;
  --accent-coral: #f97316;

  /* Accent opacity helpers */
  --accent-opa-06: rgba(59, 130, 246, 0.06);
  --accent-opa-08: rgba(59, 130, 246, 0.08);
  --accent-opa-10: rgba(59, 130, 246, 0.10);
  --accent-opa-12: rgba(59, 130, 246, 0.12);
  --accent-opa-13: rgba(59, 130, 246, 0.13);
  --accent-opa-15: rgba(59, 130, 246, 0.15);
  --accent-opa-18: rgba(59, 130, 246, 0.18);
  --accent-opa-20: rgba(59, 130, 246, 0.20);
  --accent-opa-25: rgba(59, 130, 246, 0.25);
  --accent-opa-30: rgba(59, 130, 246, 0.30);
  --accent-opa-35: rgba(59, 130, 246, 0.35);
  --accent-opa-03: rgba(59, 130, 246, 0.03);
  --accent-opa-40: rgba(59, 130, 246, 0.40);
  --accent-opa-50: rgba(59, 130, 246, 0.50);

  /* Glow opacity helpers */
  --glow-opa-08: rgba(99, 102, 241, 0.08);
  --glow-opa-15: rgba(99, 102, 241, 0.15);

  /* Gradients */
  --gradient-brand: linear-gradient(135deg, #2563eb 0%, #0891b2 48%, #14b8a6 100%);
  --gradient-brand-reverse: linear-gradient(135deg, #14b8a6 0%, #0891b2 52%, #2563eb 100%);
  --gradient-hero: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(20, 184, 166, 0.08) 46%, rgba(245, 158, 11, 0.08));

  /* Semantic */
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.08);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.08);
  --error: #ef4444;
  --error-bg: rgba(239, 68, 68, 0.08);
  --info: #3b82f6;
  --info-bg: rgba(59, 130, 246, 0.08);

  /* Method badges */
  --method-post-bg: rgba(59, 130, 246, 0.12);
  --method-post-color: #2563eb;
  --method-get-bg: rgba(14, 165, 233, 0.12);
  --method-get-color: #0284c7;
  --method-put-bg: rgba(245, 158, 11, 0.12);
  --method-put-color: #d97706;
  --method-delete-bg: rgba(239, 68, 68, 0.12);
  --method-delete-color: #dc2626;

  /* Code */
  --code-bg: #1e293b;
  --code-border: rgba(59, 130, 246, 0.2);
  --code-text: #e2e8f0;
  --code-keyword: #818cf8;
  --code-string: #34d399;
  --code-function: #60a5fa;
  --code-comment: #94a3b8;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 8px;
  --radius-xl: 8px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 12px 30px rgba(15, 23, 42, 0.07), 0 0 0 1px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 18px 50px rgba(15, 23, 42, 0.1), 0 0 0 1px rgba(15, 23, 42, 0.06);
  --shadow-glow: 0 18px 46px rgba(37, 99, 235, 0.14);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;

  /* Typography */
  --font-display: 'Outfit', system-ui, sans-serif;
  --font-body: 'Plus Jakarta Sans', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Sidebar */
  --sidebar-width: 260px;

  /* Noise texture */
  --noise: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.015'/%3E%3C/svg%3E");
}

/* ---- Dark Theme ---- */
[data-theme="dark"] {
  --bg-root: #0b1020;
  --bg-base: #101624;
  --bg-elevated: #151b2a;
  --bg-surface: #192232;
  --bg-surface-hover: #202b3d;
  --bg-glass: rgba(21, 27, 42, 0.78);
  --bg-glass-hover: rgba(25, 34, 50, 0.88);
  --header-bg: rgba(11, 16, 32, 0.84);
  --sidebar-bg: rgba(16, 22, 36, 0.72);
  --search-input-bg: rgba(25, 34, 50, 0.86);

  --border-subtle: rgba(139, 143, 255, 0.08);
  --border-default: rgba(139, 143, 255, 0.13);
  --border-hover: rgba(139, 143, 255, 0.25);
  --border-focus: rgba(139, 143, 255, 0.4);

  --text-primary: #e4e5f0;
  --text-secondary: #9b9db8;
  --text-muted: #5e6078;
  --text-inverse: #08090f;

  --accent: #60a5fa;
  --accent-deep: #3b82f6;
  --accent-glow: #2dd4bf;
  --accent-sky: #22d3ee;
  --accent-warm: #fbbf24;
  --accent-coral: #fb923c;

  --accent-opa-06: rgba(139, 143, 255, 0.06);
  --accent-opa-08: rgba(139, 143, 255, 0.08);
  --accent-opa-10: rgba(139, 143, 255, 0.10);
  --accent-opa-12: rgba(139, 143, 255, 0.12);
  --accent-opa-13: rgba(139, 143, 255, 0.13);
  --accent-opa-15: rgba(139, 143, 255, 0.15);
  --accent-opa-18: rgba(139, 143, 255, 0.18);
  --accent-opa-20: rgba(139, 143, 255, 0.20);
  --accent-opa-25: rgba(139, 143, 255, 0.25);
  --accent-opa-30: rgba(139, 143, 255, 0.30);
  --accent-opa-35: rgba(139, 143, 255, 0.35);
  --accent-opa-03: rgba(139, 143, 255, 0.03);
  --accent-opa-40: rgba(139, 143, 255, 0.40);
  --accent-opa-50: rgba(139, 143, 255, 0.50);

  --glow-opa-08: rgba(192, 132, 252, 0.08);
  --glow-opa-15: rgba(192, 132, 252, 0.15);

  --gradient-brand: linear-gradient(135deg, #60a5fa 0%, #22d3ee 48%, #2dd4bf 100%);
  --gradient-brand-reverse: linear-gradient(135deg, #2dd4bf 0%, #22d3ee 52%, #60a5fa 100%);
  --gradient-hero: linear-gradient(135deg, rgba(96, 165, 250, 0.18), rgba(45, 212, 191, 0.1) 46%, rgba(251, 191, 36, 0.1));

  --success: #34d399;
  --success-bg: rgba(52, 211, 153, 0.1);
  --warning: #fbbf24;
  --warning-bg: rgba(251, 191, 36, 0.1);
  --error: #f87171;
  --error-bg: rgba(248, 113, 113, 0.1);
  --info: #60a5fa;
  --info-bg: rgba(96, 165, 250, 0.1);

  --method-post-bg: rgba(139, 143, 255, 0.15);
  --method-post-color: #8b8fff;
  --method-get-bg: rgba(100, 181, 246, 0.15);
  --method-get-color: #64b5f6;
  --method-put-bg: rgba(251, 191, 36, 0.15);
  --method-put-color: #fbbf24;
  --method-delete-bg: rgba(248, 113, 113, 0.15);
  --method-delete-color: #f87171;

  --code-bg: #05060d;
  --code-border: rgba(139, 143, 255, 0.18);
  --code-text: #e0e0ec;
  --code-keyword: #c084fc;
  --code-string: #6ee7b7;
  --code-function: #64b5f6;
  --code-comment: #5a5c78;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(139, 143, 255, 0.06);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(139, 143, 255, 0.1);
  --shadow-glow: 0 0 20px rgba(139, 143, 255, 0.15), 0 0 60px rgba(192, 132, 252, 0.08);

  --noise: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.025'/%3E%3C/svg%3E");
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0) 320px),
    var(--bg-root);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Noise overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: var(--noise);
  pointer-events: none;
  z-index: 9999;
  opacity: 0.6;
}

/* Ambient glow — full width */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 520px;
  background: var(--gradient-hero);
  mask-image: linear-gradient(to bottom, #000, transparent 86%);
  pointer-events: none;
  z-index: 0;
}

[data-theme="dark"] body {
  background:
    linear-gradient(180deg, rgba(11, 16, 32, 0.92), rgba(11, 16, 32, 0) 360px),
    var(--bg-root);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}
a:hover {
  color: var(--accent-glow);
}

code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--accent-opa-10);
  padding: 2px 6px;
  border-radius: 3px;
  color: var(--accent-glow);
}

pre {
  font-family: var(--font-mono);
  line-height: 1.6;
}

ul, ol {
  margin: 8px 0 16px 20px;
}

li {
  margin-bottom: 4px;
}

img {
  max-width: 100%;
  height: auto;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--accent-opa-20);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-opa-35);
}

/* Selection */
::selection {
  background: var(--accent-opa-35);
  color: #fff;
}

/* ============================================================
   Typography
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--text-primary);
  line-height: 1.25;
  letter-spacing: 0;
}
h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); font-weight: 700; margin-bottom: 12px; }
h2 { font-size: 1.375rem; font-weight: 600; margin-top: 36px; margin-bottom: 12px; padding-top: 8px; border-top: 1px solid var(--border-subtle); }
h2:first-of-type { border-top: none; padding-top: 0; }
h3 { font-size: 1.1rem; font-weight: 600; margin-top: 24px; margin-bottom: 8px; color: var(--text-secondary); }

.page-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
  border-top: none;
  padding-top: 0;
}

.page-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin-bottom: 32px;
  font-weight: 400;
}

/* ============================================================
   Header
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding: 0 var(--space-lg);
  background: var(--header-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.55) inset;
}

.header-left,
.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  min-width: 0;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.01em;
  margin-right: var(--space-lg);
  white-space: nowrap;
}
.logo:hover { color: var(--text-primary); }
.logo-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px var(--accent-opa-30);
  overflow: hidden;
  object-fit: cover;
}

/* Top Nav */
.top-nav {
  display: flex;
  gap: 4px;
  align-items: center;
}
.top-nav a {
  padding: 7px 13px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
}
.top-nav a:hover,
.top-nav a.active {
  color: var(--text-primary);
  background: var(--bg-surface);
  box-shadow: var(--shadow-sm);
}
.top-nav .product-nav-link:nth-child(2) {
  margin-right: 8px;
  border-right: 1px solid var(--border-default);
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  padding-right: 17px;
}
.product-mobile-nav { display: none; }

/* Search */
.search-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}
.search-input {
  width: 220px;
  padding: 7px 14px 7px 36px;
  background: var(--search-input-bg);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.825rem;
  font-family: var(--font-body);
  outline: none;
  transition: all var(--duration-normal) var(--ease-out);
}
.search-input:focus {
  width: 300px;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-opa-10), 0 0 12px var(--accent-opa-08);
}
.search-input::placeholder {
  color: var(--text-muted);
}
.search-icon {
  position: absolute;
  left: 12px;
  font-size: 0.9rem;
  color: var(--text-muted);
  pointer-events: none;
}
.search-results {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-height: 360px;
  overflow-y: auto;
  z-index: 200;
}
.search-results.visible {
  display: block;
}
.search-result-item {
  padding: 10px 16px;
  cursor: pointer;
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
  border-bottom: 1px solid var(--border-subtle);
}
.search-result-item:last-child { border-bottom: none; }
.search-result-item:hover,
.search-result-item.active {
  background: var(--accent-opa-08);
  color: var(--text-primary);
}
.search-result-item .result-title {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}
.search-result-item .result-path {
  font-size: 0.75rem;
  color: var(--text-muted);
}
.search-result-no {
  padding: 14px 16px;
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
}

/* Language switch */
.lang-switch {
  display: flex;
  background: var(--bg-surface-hover);
  border-radius: var(--radius-sm);
  padding: 2px;
  border: 1px solid var(--border-subtle);
}
.lang-btn {
  padding: 4px 10px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  border-radius: calc(var(--radius-sm) - 2px);
  transition: all var(--duration-fast) var(--ease-out);
}
.lang-btn.active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 8px var(--accent-opa-40);
}
.lang-btn:hover:not(.active) {
  color: var(--text-secondary);
}

/* Theme toggle button */
.theme-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  margin-left: var(--space-sm);
  background: var(--bg-surface-hover);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1.1rem;
  color: var(--text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
  line-height: 1;
  padding: 0;
}
.theme-toggle-btn:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border-color: var(--border-default);
  transform: rotate(15deg);
}

/* Mobile menu button */
.mobile-menu-btn {
  display: none;
  width: 38px;
  height: 38px;
  display: none;
  align-items: center;
  justify-content: center;
  background: var(--bg-surface-hover);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0;
  line-height: 1;
}

/* ============================================================
   Layout: Sidebar + Content
   ============================================================ */
.page-wrapper {
  display: flex;
  min-height: calc(100vh - 64px);
  position: relative;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  height: calc(100vh - 64px);
  position: sticky;
  top: 64px;
  overflow-y: auto;
  padding: var(--space-lg) var(--space-md);
  background: var(--sidebar-bg);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-right: 1px solid var(--border-subtle);
}

.sidebar-section {
  margin-bottom: var(--space-lg);
}
.sidebar-section-title {
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 0 var(--space-sm);
  margin-bottom: var(--space-sm);
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.825rem;
  color: var(--text-secondary);
  font-weight: 450;
  transition: all var(--duration-fast) var(--ease-out);
  position: relative;
  line-height: 1.4;
}
.sidebar-link:hover {
  color: var(--text-primary);
  background: var(--accent-opa-06);
}
.sidebar-link.active {
  color: var(--text-primary);
  background: var(--accent-opa-10);
  font-weight: 600;
}
.sidebar-link.active::before {
  content: '';
  position: absolute;
  left: -12px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 16px;
  background: var(--gradient-brand);
  border-radius: 0 3px 3px 0;
}

/* API method badge */
.api-method {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  min-width: 34px;
  height: 18px;
  border-radius: 3px;
  font-size: 0.6rem;
  font-weight: 700;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}
.method-post { background: var(--method-post-bg); color: var(--method-post-color); }
.method-get { background: var(--method-get-bg); color: var(--method-get-color); }
.method-put { background: var(--method-put-bg); color: var(--method-put-color); }
.method-delete { background: var(--method-delete-bg); color: var(--method-delete-color); }

.sidebar-badge {
  font-size: 0.6rem;
  font-weight: 700;
  font-family: var(--font-display);
  background: var(--glow-opa-15);
  color: var(--accent-glow);
  padding: 1px 6px;
  border-radius: var(--radius-full);
  letter-spacing: 0.03em;
}

/* Sidebar overlay (mobile) */
.sidebar-overlay {
  display: none;
}

.mobile-nav-drawer {
  display: none;
}

body.nav-open {
  overflow: hidden;
}

/* Main content */
.main-content {
  flex: 1;
  padding: var(--space-2xl) clamp(var(--space-lg), 4vw, var(--space-3xl));
  max-width: 980px;
  min-width: 0;
}

.content-inner {
  position: relative;
}

/* ============================================================
   API Documentation Elements
   ============================================================ */

/* Endpoint display */
.endpoint {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 8px 16px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  margin: 8px 0 20px;
}
.endpoint-method {
  font-weight: 700;
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  padding: 2px 8px;
  border-radius: 4px;
}
.endpoint-post { background: var(--accent-opa-20); color: var(--method-post-color); }
.endpoint-get { background: var(--accent-opa-20); color: var(--method-get-color); }
.endpoint-put { background: var(--accent-opa-20); color: var(--method-put-color); }
.endpoint-delete { background: var(--accent-opa-20); color: var(--method-delete-color); }
.endpoint-path { color: var(--text-primary); letter-spacing: -0.01em; }

/* Tables */
.doc-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 12px 0 24px;
  font-size: 0.85rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.doc-table th {
  text-align: left;
  padding: 10px 14px;
  background: color-mix(in srgb, var(--bg-surface) 86%, var(--accent) 14%);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-default);
}
.doc-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  line-height: 1.5;
}
.doc-table tr:last-child td {
  border-bottom: none;
}
.doc-table tr:hover td {
  background: var(--accent-opa-06);
}
.doc-table .param-name {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent-glow);
  font-weight: 500;
}
.param-required,
.param-optional {
  display: inline-block;
  padding: 1px 8px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.param-required {
  background: rgba(248, 113, 113, 0.12);
  color: #f87171;
}
.param-optional {
  background: rgba(100, 181, 246, 0.1);
  color: #64b5f6;
}

/* Code blocks */
.code-block-wrapper {
  margin: 16px 0 24px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--code-border);
  background: var(--code-bg);
  box-shadow: var(--shadow-md);
}

.code-tabs {
  display: flex;
  gap: 2px;
  background: var(--bg-surface);
  padding: 4px;
  margin: 0;
  border-bottom: 1px solid var(--border-subtle);
  overflow-x: auto;
}
.code-tab {
  padding: 6px 14px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}
.code-tab:hover {
  color: var(--text-secondary);
  background: var(--accent-opa-06);
}
.code-tab.active {
  color: var(--accent);
  background: var(--accent-opa-10);
}

.code-block {
  position: relative;
}
.code-panel {
  padding: 16px 20px;
  overflow-x: auto;
}
.code-panel pre {
  font-size: 0.82rem;
  color: var(--code-text);
  white-space: pre;
  margin: 0;
}

/* Response block */
.response-block {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin: 12px 0 24px;
  overflow-x: auto;
  position: relative;
  box-shadow: var(--shadow-sm);
}
.response-block pre {
  font-size: 0.82rem;
  color: var(--code-text);
  margin: 0;
}

/* Copy button */
.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 4px 10px;
  border: 1px solid var(--border-default);
  background: rgba(22, 24, 35, 0.9);
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
  backdrop-filter: blur(8px);
}
.copy-btn:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: var(--accent-opa-12);
}
.copy-btn.copied {
  background: rgba(52, 211, 153, 0.15);
  border-color: rgba(52, 211, 153, 0.3);
  color: var(--success);
}

/* Callouts */
.callout {
  padding: 18px 22px 18px 20px;
  border-radius: 12px;
  margin: 20px 0 24px;
  border: 1px solid;
  border-left: 4px solid;
  font-size: 0.85rem;
  line-height: 1.7;
  box-shadow: var(--shadow-sm);
}
.callout-info {
  background: var(--info-bg);
  border-color: rgba(96, 165, 250, 0.18);
  border-left-color: rgba(96, 165, 250, 0.5);
  color: var(--info);
}
.callout-warning {
  background: var(--warning-bg);
  border-color: rgba(251, 191, 36, 0.18);
  border-left-color: rgba(251, 191, 36, 0.5);
  color: var(--warning);
}
.callout-danger {
  background: var(--error-bg);
  border-color: rgba(248, 113, 113, 0.18);
  border-left-color: rgba(248, 113, 113, 0.5);
  color: var(--error);
}
.callout-success {
  background: var(--success-bg);
  border-color: rgba(52, 211, 153, 0.18);
  border-left-color: rgba(52, 211, 153, 0.5);
  color: var(--success);
}
.callout-title {
  display: block;
  font-weight: 700;
  font-family: var(--font-display);
  margin-bottom: 6px;
  font-size: 0.9rem;
}
.callout p { margin: 4px 0 0; }
.callout code {
  background: var(--accent-opa-12);
  color: var(--text-primary);
}

/* Badges */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 700;
  font-family: var(--font-display);
  letter-spacing: 0.03em;
}
.badge-new {
  background: rgba(52, 211, 153, 0.15);
  color: #34d399;
}
.badge-beta {
  background: var(--glow-opa-15);
  color: var(--accent-glow);
}
.badge-deprecated {
  background: rgba(248, 113, 113, 0.12);
  color: #f87171;
}

/* ============================================================
   Footer Navigation
   ============================================================ */
.footer-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-3xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border-subtle);
}
.footer-nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
}
.footer-nav-link:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: var(--accent-opa-06);
}

/* ============================================================
   Homepage
   ============================================================ */
.home-main {
  position: relative;
  z-index: 1;
}

/* Inner container — keeps content centered while backgrounds span full width */
.home-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 clamp(var(--space-md), 4vw, var(--space-xl));
}

/* ---- Hero ---- */
.home-hero {
  text-align: center;
  padding: clamp(64px, 10vw, 112px) var(--space-lg) clamp(48px, 8vw, 80px);
  position: relative;
  isolation: isolate;
}
/* Glass backdrop — full viewport width */
.home-hero::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  z-index: -2;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  background:
    linear-gradient(150deg, var(--bg-glass), rgba(255,255,255,0.38)),
    linear-gradient(110deg, rgba(37,99,235,0.09) 0%, rgba(20,184,166,0.07) 48%, rgba(245,158,11,0.08) 100%);
  box-shadow: 0 20px 60px rgba(15,23,42,0.06);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}
/* Floating gradient orbs */
.home-hero::after {
  content: '';
  position: absolute;
  z-index: -1;
  width: 580px;
  height: 580px;
  top: -200px;
  right: -200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37,99,235,0.13) 0%, transparent 70%);
  pointer-events: none;
}
/* Cyan orb across the full page */
.home-main::before {
  content: '';
  position: absolute;
  z-index: -1;
  width: 520px;
  height: 520px;
  bottom: 140px;
  left: -180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(20,184,166,0.10) 0%, transparent 70%);
  pointer-events: none;
}
[data-theme="dark"] .home-hero::before {
  background:
    linear-gradient(150deg, rgba(21,27,42,0.9), rgba(25,34,50,0.55)),
    linear-gradient(110deg, rgba(96,165,250,0.12) 0%, rgba(45,212,191,0.09) 48%, rgba(251,191,36,0.08) 100%);
}
/* Warm orb — bottom right */
.home-main::after {
  content: '';
  position: absolute;
  z-index: -1;
  width: 480px;
  height: 480px;
  bottom: -80px;
  right: -140px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(245,158,11,0.09) 0%, transparent 70%);
  pointer-events: none;
}

[data-theme="dark"] .home-hero::after {
  background: radial-gradient(circle, rgba(96,165,250,0.16) 0%, transparent 70%);
}
[data-theme="dark"] .home-main::before {
  background: radial-gradient(circle, rgba(45,212,191,0.13) 0%, transparent 70%);
}
[data-theme="dark"] .home-main::after {
  background: radial-gradient(circle, rgba(251,191,36,0.10) 0%, transparent 70%);
}
/* Hero badge */
.home-hero .hero-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 16px 6px 6px;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 28px;
  letter-spacing: 0;
  box-shadow: 0 2px 12px var(--accent-opa-08);
}
.home-hero .hero-label::before {
  content: '';
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--success), #0d9488);
  box-shadow: 0 0 0 4px rgba(16,185,129,0.18), 0 0 12px rgba(16,185,129,0.2);
  flex-shrink: 0;
}
/* Hero title */
.home-hero h1 {
  font-size: clamp(2.4rem, 6.5vw, 4.5rem);
  font-weight: 800;
  line-height: 1.05;
  margin-bottom: 18px;
  background: linear-gradient(135deg, var(--accent) 0%, #0d9488 60%, #f59e0b 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
  letter-spacing: -0.02em;
}
[data-theme="dark"] .home-hero h1 {
  background: linear-gradient(135deg, #a5b4fc 0%, #5eead4 50%, #fbbf24 100%);
  -webkit-background-clip: text;
  background-clip: text;
}
.home-hero .hero-desc {
  font-size: clamp(1rem, 2vw, 1.18rem);
  color: var(--text-secondary);
  max-width: 660px;
  margin: 0 auto 32px;
  line-height: 1.75;
}
.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 32px;
  background: var(--gradient-brand);
  color: #fff;
  border: none;
  border-radius: var(--radius-full);
  font-size: 0.92rem;
  font-weight: 650;
  font-family: var(--font-body);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s var(--ease-out);
  box-shadow: 0 4px 24px var(--accent-opa-35);
}
.btn-primary:hover {
  box-shadow: 0 8px 32px var(--accent-opa-50);
  transform: translateY(-2px);
  color: #fff;
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 32px;
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1.5px solid var(--border-default);
  border-radius: var(--radius-full);
  font-size: 0.92rem;
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.25s var(--ease-out);
  backdrop-filter: blur(8px);
}
.btn-secondary:hover {
  border-color: var(--accent);
  background: var(--accent-opa-06);
  color: var(--accent);
  box-shadow: 0 4px 16px var(--accent-opa-10);
}

/* Feature cards grid */
.features-section {
  padding: var(--space-2xl) 0 var(--space-2xl);
}
.features-section .section-title {
  text-align: center;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.2vw, 2.1rem);
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
[data-theme="dark"] .features-section .section-title {
  background: linear-gradient(135deg, #a5b4fc, #5eead4, #fbbf24);
  -webkit-background-clip: text;
  background-clip: text;
}
.features-section .section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.95rem;
  max-width: 480px;
  margin: 0 auto var(--space-2xl);
  line-height: 1.6;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
}
.feature-card {
  min-height: 168px;
  padding: 22px 20px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  transition: all 0.35s var(--ease-out);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  display: flex;
  flex-direction: column;
}
.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 16px;
  opacity: 0;
  transition: opacity 0.35s var(--ease-out);
  pointer-events: none;
}
.feature-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px -12px rgba(37,99,235,0.15), 0 0 0 1px rgba(37,99,235,0.08);
}
.feature-card:hover::before {
  opacity: 1;
}
.feature-card .feature-icon {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  margin-bottom: 14px;
  flex-shrink: 0;
  position: relative;
}
.feature-card h3 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 650;
  margin: 0 0 4px;
  color: var(--text-primary);
  border: none;
  padding: 0;
}
.feature-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.5;
  position: relative;
  z-index: 1;
}

/* ---- Per-card accent colors ---- */
.feature-card:nth-child(8n+1) .feature-icon {
  background: linear-gradient(135deg, rgba(37,99,235,0.12), rgba(59,130,246,0.18));
  color: #2563eb;
}
.feature-card:nth-child(8n+2) .feature-icon {
  background: linear-gradient(135deg, rgba(20,184,166,0.12), rgba(13,148,136,0.18));
  color: #0d9488;
}
.feature-card:nth-child(8n+3) .feature-icon {
  background: linear-gradient(135deg, rgba(6,182,212,0.12), rgba(8,145,178,0.18));
  color: #0891b2;
}
.feature-card:nth-child(8n+4) .feature-icon {
  background: linear-gradient(135deg, rgba(99,102,241,0.12), rgba(79,70,229,0.18));
  color: #6366f1;
}
.feature-card:nth-child(8n+5) .feature-icon {
  background: linear-gradient(135deg, rgba(168,85,247,0.12), rgba(147,51,234,0.18));
  color: #9333ea;
}
.feature-card:nth-child(8n+6) .feature-icon {
  background: linear-gradient(135deg, rgba(249,115,22,0.12), rgba(234,88,12,0.18));
  color: #ea580c;
}
.feature-card:nth-child(8n+7) .feature-icon {
  background: linear-gradient(135deg, rgba(245,158,11,0.12), rgba(217,119,6,0.18));
  color: #d97706;
}
.feature-card:nth-child(8n+8) .feature-icon {
  background: linear-gradient(135deg, rgba(236,72,153,0.12), rgba(219,39,119,0.18));
  color: #db2777;
}

/* Card hover glows */
.feature-card:nth-child(8n+1):hover { border-color: rgba(37,99,235,0.3); }
.feature-card:nth-child(8n+2):hover { border-color: rgba(20,184,166,0.3); }
.feature-card:nth-child(8n+3):hover { border-color: rgba(6,182,212,0.3); }
.feature-card:nth-child(8n+4):hover { border-color: rgba(99,102,241,0.3); }
.feature-card:nth-child(8n+5):hover { border-color: rgba(168,85,247,0.3); }
.feature-card:nth-child(8n+6):hover { border-color: rgba(249,115,22,0.3); }
.feature-card:nth-child(8n+7):hover { border-color: rgba(245,158,11,0.3); }
.feature-card:nth-child(8n+8):hover { border-color: rgba(236,72,153,0.3); }

/* Dark mode icon colors */
[data-theme="dark"] .feature-card:nth-child(8n+1) .feature-icon {
  background: linear-gradient(135deg, rgba(96,165,250,0.18), rgba(59,130,246,0.26));
  color: #93c5fd;
}
[data-theme="dark"] .feature-card:nth-child(8n+2) .feature-icon {
  background: linear-gradient(135deg, rgba(45,212,191,0.18), rgba(20,184,166,0.26));
  color: #5eead4;
}
[data-theme="dark"] .feature-card:nth-child(8n+3) .feature-icon {
  background: linear-gradient(135deg, rgba(34,211,238,0.18), rgba(6,182,212,0.26));
  color: #67e8f9;
}
[data-theme="dark"] .feature-card:nth-child(8n+4) .feature-icon {
  background: linear-gradient(135deg, rgba(165,180,252,0.18), rgba(129,140,248,0.26));
  color: #c7d2fe;
}
[data-theme="dark"] .feature-card:nth-child(8n+5) .feature-icon {
  background: linear-gradient(135deg, rgba(192,132,252,0.18), rgba(168,85,247,0.26));
  color: #d8b4fe;
}
[data-theme="dark"] .feature-card:nth-child(8n+6) .feature-icon {
  background: linear-gradient(135deg, rgba(251,146,60,0.18), rgba(249,115,22,0.26));
  color: #fdba74;
}
[data-theme="dark"] .feature-card:nth-child(8n+7) .feature-icon {
  background: linear-gradient(135deg, rgba(251,191,36,0.18), rgba(245,158,11,0.26));
  color: #fde68a;
}
[data-theme="dark"] .feature-card:nth-child(8n+8) .feature-icon {
  background: linear-gradient(135deg, rgba(244,114,182,0.18), rgba(236,72,153,0.26));
  color: #f9a8d4;
}

/* ============================================================
   SDK Page — Cards
   ============================================================ */
.sdk-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--space-md);
  margin: var(--space-lg) 0;
}
.sdk-card {
  padding: var(--space-lg);
  background: linear-gradient(180deg, var(--bg-surface), color-mix(in srgb, var(--bg-surface) 92%, var(--accent) 8%));
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  transition: all var(--duration-normal) var(--ease-out);
  box-shadow: var(--shadow-sm);
}
.sdk-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}
.sdk-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.sdk-card-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  font-size: 1.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.sdk-card h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 4px;
  border: none;
  padding: 0;
}
.sdk-card .sdk-link {
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 500;
}

/* ============================================================
   FAQ — Accordion style
   ============================================================ */
.faq-item {
  background: linear-gradient(180deg, var(--bg-surface), color-mix(in srgb, var(--bg-surface) 94%, var(--accent) 6%));
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  margin-bottom: 12px;
  transition: all var(--duration-fast) var(--ease-out);
  box-shadow: var(--shadow-sm);
}
.faq-item:hover {
  border-color: var(--border-default);
}
.faq-item h3 {
  margin-top: 0;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  border: none;
  padding: 0;
}
.faq-item p {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin: 6px 0 0;
}

/* ============================================================
   Changelog — Timeline
   ============================================================ */
.changelog-entry {
  position: relative;
  padding: 20px 0 20px 28px;
  border-left: 1px solid var(--border-default);
}
.changelog-entry::before {
  content: '';
  position: absolute;
  left: -5px;
  top: 26px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-opa-50);
}
.changelog-entry:first-child::before {
  background: var(--success);
  box-shadow: 0 0 8px rgba(52, 211, 153, 0.5);
}
.changelog-entry h2 {
  border: none;
  padding: 0;
  margin-top: 0;
  font-size: 1.15rem;
  font-weight: 700;
}
.changelog-entry .cl-date {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 8px;
}

/* ============================================================
   Reveal Animations
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.05s; }
.reveal-delay-2 { transition-delay: 0.1s; }
.reveal-delay-3 { transition-delay: 0.15s; }
.reveal-delay-4 { transition-delay: 0.2s; }
.reveal-delay-5 { transition-delay: 0.25s; }

/* Staggered list reveals */
.reveal-list > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out);
}
.reveal-list.visible > *:nth-child(1) { transition-delay: 0s; opacity: 1; transform: translateY(0); }
.reveal-list.visible > *:nth-child(2) { transition-delay: 0.08s; opacity: 1; transform: translateY(0); }
.reveal-list.visible > *:nth-child(3) { transition-delay: 0.16s; opacity: 1; transform: translateY(0); }
.reveal-list.visible > *:nth-child(4) { transition-delay: 0.24s; opacity: 1; transform: translateY(0); }
.reveal-list.visible > *:nth-child(5) { transition-delay: 0.32s; opacity: 1; transform: translateY(0); }
.reveal-list.visible > *:nth-child(6) { transition-delay: 0.4s; opacity: 1; transform: translateY(0); }
.reveal-list.visible > *:nth-child(7) { transition-delay: 0.48s; opacity: 1; transform: translateY(0); }
.reveal-list.visible > *:nth-child(8) { transition-delay: 0.56s; opacity: 1; transform: translateY(0); }

/* ============================================================
   Section Divider
   ============================================================ */
.section-divider {
  display: flex;
  align-items: center;
  gap: 20px;
  margin: var(--space-3xl) 0 var(--space-2xl);
  color: var(--text-muted);
  font-size: 0.82rem;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.section-divider::before,
.section-divider::after {
  content: '';
  flex: 1;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent, var(--border-subtle), transparent);
}
.section-divider::before {
  background: linear-gradient(90deg, transparent, var(--border-subtle));
}
.section-divider::after {
  background: linear-gradient(90deg, var(--border-subtle), transparent);
}

/* ============================================================
   Progress bar (scroll indicator)
   ============================================================ */
.reading-progress {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  height: 2px;
  background: transparent;
  z-index: 101;
}
.reading-progress-bar {
  height: 100%;
  background: var(--gradient-brand);
  width: 0%;
  transition: width 0.1s linear;
}

/* ============================================================
   Stats Section
   ============================================================ */
.stats-section {
  background: var(--bg-raised);
  border-block: 1px solid var(--border);
  padding: var(--space-2xl) 0;
  margin: var(--space-3xl) calc(-1 * var(--space-2xl)) 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-2xl);
}
.stat-item {
  text-align: center;
}
.stat-number {
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 800;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}
.stat-label {
  margin-top: 6px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ============================================================
   Language Showcase
   ============================================================ */
.lang-showcase {
  margin-top: var(--space-3xl);
}
.lang-showcase h2 {
  text-align: center;
  margin-bottom: var(--space-sm);
}
.lang-showcase .lang-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: var(--space-2xl);
  max-width: 36rem;
  margin-inline: auto;
}
.lang-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px;
}
.lang-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--bg-default);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: all 0.2s var(--ease-out);
  cursor: default;
}
.lang-item:hover {
  border-color: var(--accent);
  background: var(--bg-raised);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}
.lang-flag {
  font-size: 1.2rem;
  line-height: 1;
}
.lang-code {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
}

/* ============================================================
   Use Cases Section
   ============================================================ */
.use-cases {
  margin-top: var(--space-3xl);
}
.use-cases h2 {
  text-align: center;
  margin-bottom: var(--space-sm);
}
.use-cases .uc-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: var(--space-2xl);
  max-width: 36rem;
  margin-inline: auto;
}
.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}
.uc-card {
  padding: var(--space-2xl);
  background: var(--bg-default);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all 0.25s var(--ease-out);
}
.uc-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.uc-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent-soft), rgba(102,126,234,0.15));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
}
.uc-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}
.uc-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* ============================================================
   CTA Section
   ============================================================ */
.cta-section {
  margin-top: var(--space-3xl);
  padding: var(--space-2xl) var(--space-2xl);
  background: linear-gradient(135deg, var(--accent), #764ba2);
  border-radius: var(--radius-xl);
  text-align: center;
  color: #fff;
}
.cta-section h2 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: var(--space-sm);
  color: #fff;
}
.cta-section p {
  font-size: 1.05rem;
  opacity: 0.9;
  margin-bottom: var(--space-xl);
  max-width: 32rem;
  margin-inline: auto;
}
.cta-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}
.btn-cta-white {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: rgba(255,255,255,0.95);
  color: var(--accent);
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.95rem;
  transition: all 0.2s var(--ease-out);
  text-decoration: none;
}
.btn-cta-white:hover {
  background: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.2);
}
.btn-cta-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.5);
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.95rem;
  transition: all 0.2s var(--ease-out);
  text-decoration: none;
}
.btn-cta-outline:hover {
  border-color: #fff;
  background: rgba(255,255,255,0.1);
  transform: translateY(-2px);
}

/* ============================================================
   Global Footer
   ============================================================ */
.global-footer {
  margin-top: var(--space-3xl);
  padding: var(--space-3xl) var(--space-2xl) var(--space-xl);
  border-top: 1px solid var(--border);
  background: var(--bg-raised);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  max-width: var(--content-max);
  margin: 0 auto;
}
.footer-brand .logo-text {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}
.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-tertiary);
  line-height: 1.6;
  margin: 0;
  max-width: 18rem;
}
.footer-col h4 {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}
.footer-col a {
  display: block;
  font-size: 0.88rem;
  color: var(--text-tertiary);
  text-decoration: none;
  padding: 5px 0;
  transition: color 0.2s;
}
.footer-col a:hover {
  color: var(--accent);
}
.footer-bottom {
  max-width: var(--content-max);
  margin: var(--space-2xl) auto 0;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--text-tertiary);
}
.footer-bottom-links {
  display: flex;
  gap: var(--space-lg);
}
.footer-bottom-links a {
  color: var(--text-tertiary);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-bottom-links a:hover {
  color: var(--accent);
}

/* ============================================================
   FAQ Accordion
   ============================================================ */
.faq-search {
  margin-bottom: var(--space-xl);
  position: relative;
}
.faq-search input {
  width: 100%;
  padding: 14px 20px 14px 48px;
  background: var(--bg-default);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  font-size: 0.95rem;
  color: var(--text-primary);
  font-family: inherit;
  outline: none;
  transition: all 0.2s var(--ease-out);
}
.faq-search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.faq-search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1rem;
  color: var(--text-tertiary);
  pointer-events: none;
}
.faq-categories {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-bottom: var(--space-2xl);
}
.faq-cat-btn {
  padding: 8px 18px;
  background: var(--bg-default);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s var(--ease-out);
  font-family: inherit;
}
.faq-cat-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.faq-cat-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.faq-group {
  margin-bottom: var(--space-2xl);
}
.faq-group-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--accent);
  display: inline-block;
}
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
  background: var(--bg-default);
  overflow: hidden;
  transition: all 0.2s var(--ease-out);
}
.faq-item:hover {
  border-color: var(--accent-soft);
}
.faq-question {
  width: 100%;
  padding: 18px 20px;
  background: none;
  border: none;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  font-family: inherit;
  line-height: 1.5;
}
.faq-arrow {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  transition: transform 0.3s var(--ease-out);
  color: var(--text-tertiary);
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.faq-item.open .faq-arrow {
  transform: rotate(180deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s var(--ease-out), padding 0.35s var(--ease-out);
}
.faq-item.open .faq-answer {
  max-height: 600px;
}
.faq-answer-content {
  padding: 0 20px 20px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
}
.faq-answer-content p {
  margin: 0 0 8px;
}
.faq-answer-content code {
  background: var(--bg-raised);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
}
.faq-no-results {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--text-tertiary);
  font-size: 0.95rem;
}

/* ============================================================
   Enhanced Changelog Timeline
   ============================================================ */
.changelog-timeline {
  position: relative;
  padding-left: var(--space-2xl);
}
.changelog-timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--border));
  border-radius: 1px;
}
.changelog-entry {
  position: relative;
  margin-bottom: var(--space-xl);
}
.changelog-entry::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-2xl) + 1px);
  top: 10px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg-default);
  border: 3px solid var(--accent);
  z-index: 1;
}
.changelog-entry:first-child::before {
  background: var(--accent);
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .site-header { padding: 0 var(--space-md); }
  .logo { margin-right: var(--space-sm); }
  .search-input { width: 150px; }
  .search-input:focus { width: 210px; }
  .top-nav a { padding: 6px 10px; font-size: 0.8rem; }
  .features-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 1180px) and (min-width: 769px) {
  .site-header { padding: 0 var(--space-md); }
  .header-left, .header-right { gap: var(--space-sm); }
  .logo { margin-right: 0; }
  .top-nav a { padding: 6px 8px; font-size: 0.78rem; }
  .top-nav .product-nav-link:nth-child(2) { margin-right: 3px; padding-right: 11px; }
  .search-input { width: 120px; }
  .search-input:focus { width: 150px; }
}

@media (max-width: 768px) {
  .site-header {
    padding: 0 var(--space-md);
    min-height: 56px;
    gap: var(--space-sm);
  }
  .header-left { flex: 0 1 auto; }
  .header-right { gap: 8px; }
  .logo {
    margin-right: 0;
    font-size: 1.05rem;
  }
  .logo-icon {
    width: 28px;
    height: 28px;
  }
  .top-nav { display: none; }
  .mobile-menu-btn { display: inline-flex; }
  .mobile-menu-btn.open {
    color: var(--text-primary);
    background: var(--accent-opa-10);
    border-color: var(--border-hover);
  }

  .sidebar {
    position: fixed;
    left: -100%;
    top: 56px;
    z-index: 150;
    width: min(86vw, 320px);
    min-width: 0;
    height: calc(100vh - 56px);
    background: var(--bg-elevated);
    border-right: 1px solid var(--border-default);
    transition: left 0.3s var(--ease-out);
    padding: var(--space-md);
  }
  .sidebar.open {
    left: 0;
    box-shadow: var(--shadow-lg);
  }
  .product-mobile-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--border-default);
  }
  .product-mobile-nav a {
    padding: 9px 10px;
    border-radius: var(--radius-sm);
    background: var(--accent-opa-10);
    color: var(--text-primary);
    font-size: 0.82rem;
    font-weight: 600;
    text-align: center;
  }
  .sidebar-overlay {
    display: block;
    position: fixed;
    inset: 0;
    top: 56px;
    background: transparent;
    z-index: 130;
    opacity: 0;
    pointer-events: none;
  }
  .sidebar-overlay.open {
    opacity: 1;
    pointer-events: auto;
  }

  .mobile-nav-drawer {
    display: flex;
    position: fixed;
    top: 56px;
    right: -100%;
    z-index: 150;
    width: min(82vw, 300px);
    height: calc(100vh - 56px);
    flex-direction: column;
    gap: 6px;
    padding: var(--space-md);
    background: var(--bg-elevated);
    border-left: 1px solid var(--border-default);
    box-shadow: var(--shadow-lg);
    transition: right 0.3s var(--ease-out);
  }
  .mobile-nav-drawer.open {
    right: 0;
  }
  .mobile-nav-drawer a {
    display: flex;
    align-items: center;
    min-height: 42px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-weight: 600;
  }
  .mobile-nav-drawer a:hover,
  .mobile-nav-drawer a.active {
    background: var(--accent-opa-10);
    color: var(--text-primary);
  }
  .mobile-nav-drawer .product-nav-link:nth-child(2) {
    margin: 0 0 8px;
    border-right: 0;
    border-bottom: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    padding-right: 12px;
    padding-bottom: 16px;
  }

  .main-content {
    padding: var(--space-xl) var(--space-md);
    max-width: none;
    width: 100%;
  }
  .page-wrapper {
    min-height: calc(100vh - 56px);
  }
  .reading-progress {
    top: 56px;
  }
  .search-input {
    width: 40px;
    padding-left: 34px;
    padding-right: 8px;
    color: transparent;
  }
  .search-input::placeholder { color: transparent; }
  .search-input:focus {
    position: fixed;
    top: 64px;
    left: var(--space-md);
    right: var(--space-md);
    z-index: 180;
    width: auto;
    color: var(--text-primary);
    padding-right: 14px;
    box-shadow: var(--shadow-lg);
  }
  .search-input:focus::placeholder { color: var(--text-muted); }
  .search-wrapper:focus-within .search-icon {
    position: fixed;
    top: 74px;
    left: calc(var(--space-md) + 12px);
    z-index: 181;
  }
  .search-results {
    position: fixed;
    top: 108px;
    left: var(--space-md);
    right: var(--space-md);
    z-index: 181;
    max-height: min(360px, calc(100vh - 132px));
  }
  .features-grid { grid-template-columns: 1fr; }
  .sdk-grid { grid-template-columns: 1fr; }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    max-width: 320px;
    margin: 0 auto;
  }
  .btn-primary,
  .btn-secondary {
    justify-content: center;
    width: 100%;
  }

  .home-inner {
    padding: 0 var(--space-md);
  }
  .home-hero {
    padding: 48px 0 36px;
  }
  .home-hero .hero-desc {
    max-width: 33rem;
  }

  .doc-table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
  }
  .doc-table th,
  .doc-table td {
    padding: 10px 12px;
  }
  .endpoint {
    display: flex;
    align-items: flex-start;
    overflow-x: auto;
    max-width: 100%;
  }
  .code-panel,
  .response-block {
    padding: 14px 16px;
  }
  .copy-btn {
    position: sticky;
    float: right;
    top: 8px;
    right: 8px;
  }
  .footer-nav {
    gap: var(--space-sm);
  }
  .footer-nav-link {
    flex: 1;
    justify-content: center;
    min-height: 42px;
    text-align: center;
  }

  h1 { font-size: 1.5rem; }
  .home-hero h1 { font-size: 2.05rem; }
  .page-title { font-size: 2rem; }
  h2 {
    font-size: 1.2rem;
    margin-top: 30px;
  }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-lg); }
  .stat-number { font-size: 2.2rem; }
  .use-cases-grid { grid-template-columns: repeat(2, 1fr); }
  .lang-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }
  .footer-grid { grid-template-columns: repeat(3, 1fr); }
  .cta-section { padding: var(--space-xl) var(--space-md); }
  .cta-section h2 { font-size: 1.3rem; }
  .changelog-timeline { padding-left: var(--space-lg); }
  .faq-categories { gap: 6px; }
  .faq-cat-btn { padding: 6px 14px; font-size: 0.8rem; }
}

@media (max-width: 480px) {
  .site-header {
    padding: 0 12px;
  }
  .header-right { gap: 6px; }
  .lang-switch { display: none; }
  .theme-toggle-btn,
  .mobile-menu-btn,
  .search-input {
    width: 36px;
    height: 36px;
  }
  .home-hero h1 {
    font-size: 1.85rem;
  }
  .home-hero .hero-desc {
    font-size: 0.96rem;
  }
  .feature-card {
    min-height: 0;
    padding: 18px;
  }
  .section-divider {
    gap: 10px;
    margin: var(--space-xl) 0;
    font-size: 0.7rem;
  }
  .footer-nav {
    flex-direction: column;
    align-items: stretch;
  }
  .stats-grid { grid-template-columns: 1fr; gap: var(--space-md); }
  .stat-number { font-size: 1.9rem; }
  .use-cases-grid { grid-template-columns: 1fr; }
  .lang-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-lg); }
  .footer-bottom { flex-direction: column; gap: var(--space-sm); text-align: center; }
  .cta-buttons { flex-direction: column; align-items: center; }
  .btn-cta-white, .btn-cta-outline { width: 100%; justify-content: center; }
  .faq-categories { flex-wrap: nowrap; overflow-x: auto; -webkit-overflow-scrolling: touch; padding-bottom: 4px; }
  .faq-cat-btn { flex-shrink: 0; }
  .faq-question { font-size: 0.88rem; padding: 14px 16px; }
  .faq-answer-content { padding: 0 16px 16px; }
}

/* ============================================================
   Focus & Accessibility
   ============================================================ */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}