/* ============================================
   ZgradIS Documentation - Modern Professional Design
   ============================================ */

/* CSS Variables */
:root {
  /* Colors - Clean Professional Palette */
  --color-bg: #ffffff;
  --color-bg-alt: #fafafa;
  --color-bg-elevated: #ffffff;
  --color-border: #e5e5e5;
  --color-border-light: #f0f0f0;
  --color-text: #171717;
  --color-text-secondary: #525252;
  --color-text-tertiary: #737373;

  /* Brand Colors - Professional Blue/Teal */
  --color-primary: #0891b2;
  --color-primary-hover: #0e7490;
  --color-primary-light: rgba(8, 145, 178, 0.1);
  --color-primary-dark: #155e75;

  /* Accent Gradients */
  --gradient-primary: linear-gradient(135deg, #0891b2 0%, #06b6d4 100%);
  --gradient-secondary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --gradient-accent: linear-gradient(135deg, #ec4899 0%, #f43f5e 100%);
  --gradient-success: linear-gradient(135deg, #059669 0%, #10b981 100%);
  --gradient-warm: linear-gradient(135deg, #ea580c 0%, #f59e0b 100%);

  /* Status Colors */
  --color-success: #059669;
  --color-success-light: rgba(5, 150, 105, 0.1);
  --color-warning: #d97706;
  --color-warning-light: rgba(217, 119, 6, 0.1);
  --color-danger: #dc2626;
  --color-danger-light: rgba(220, 38, 38, 0.1);
  --color-info: #6366f1;
  --color-info-light: rgba(99, 102, 241, 0.1);

  /* Typography - Distinctive Professional Fonts */
  --font-family-display: 'Bricolage Grotesque', 'Space Grotesk', system-ui, sans-serif;
  --font-family: 'IBM Plex Sans', -apple-system, system-ui, sans-serif;
  --font-family-mono: "Fira Code", "JetBrains Mono", Monaco, monospace;

  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3.5rem;

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;

  /* Layout */
  --sidebar-width: 280px;
  --header-height: 72px;
  --content-max-width: 900px;

  /* Shadows - Softer, more modern */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.1), 0 4px 8px rgba(0, 0, 0, 0.06);
  --shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.12), 0 8px 16px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.15);
  --shadow-glow-strong: 0 0 60px rgba(59, 130, 246, 0.25);

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --color-bg: #0a0a0a;
  --color-bg-alt: #171717;
  --color-bg-elevated: #262626;
  --color-border: #404040;
  --color-border-light: #262626;
  --color-text: #fafafa;
  --color-text-secondary: #a3a3a3;
  --color-text-tertiary: #737373;
  --color-primary: #06b6d4;
  --color-primary-hover: #22d3ee;
  --color-primary-light: rgba(6, 182, 212, 0.2);
  --color-primary-dark: #0891b2;

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 40px rgba(6, 182, 212, 0.3);
  --shadow-glow-strong: 0 0 60px rgba(6, 182, 212, 0.5);
}

/* ============================================
   Reset & Base Styles
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600;700&family=Bricolage+Grotesque:wght@600;700;800&family=Fira+Code:wght@400;500&display=swap');

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 2rem);
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  width: 100%;
  max-width: 100vw;
}

/* Selection */
::selection {
  background-color: var(--color-primary);
  color: white;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

h1 {
  font-family: var(--font-family-display);
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-extrabold);
  margin-bottom: var(--spacing-lg);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: var(--font-size-2xl);
  margin-top: var(--spacing-3xl);
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--color-border-light);
  position: relative;
}

h2::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
}

h3 {
  font-size: var(--font-size-xl);
  margin-top: var(--spacing-2xl);
  color: var(--color-text);
}

h4 {
  font-size: var(--font-size-lg);
  margin-top: var(--spacing-xl);
  font-weight: var(--font-weight-semibold);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: all var(--transition-fast);
  font-weight: var(--font-weight-medium);
}

a:hover {
  color: var(--color-primary-hover);
}

strong {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
}

code {
  font-family: var(--font-family-mono);
  font-size: 0.875em;
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-info-light) 100%);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  color: var(--color-primary-dark);
  font-weight: var(--font-weight-medium);
}

pre {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  overflow-x: auto;
  margin-bottom: var(--spacing-lg);
  line-height: var(--line-height-relaxed);
  position: relative;
}

pre::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

pre code {
  background: transparent;
  padding: 0;
  color: var(--color-text);
  font-size: var(--font-size-sm);
}

/* ============================================
   Layout Structure
   ============================================ */

.doc-container {
  display: flex;
  min-height: 100vh;
}

/* Header */
.doc-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--color-border-light);
  z-index: 100;
  display: flex;
  align-items: center;
  padding: 0 var(--spacing-xl);
  transition: all var(--transition-normal);
}

[data-theme="dark"] .doc-header {
  background: rgba(15, 23, 42, 0.85);
}

.doc-header.scrolled {
  box-shadow: var(--shadow-md);
}

.doc-logo {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  transition: transform var(--transition-fast);
}

.doc-logo:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.doc-logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
  box-shadow: var(--shadow-md), var(--shadow-glow);
  transition: all var(--transition-normal);
}

.doc-logo:hover .doc-logo-icon {
  transform: rotate(-5deg) scale(1.05);
  box-shadow: var(--shadow-lg), var(--shadow-glow-strong);
}

/* Sidebar Navigation */
.doc-sidebar {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: var(--sidebar-width);
  height: calc(100vh - var(--header-height));
  background: var(--color-bg-alt);
  border-right: 1px solid var(--color-border-light);
  overflow-y: auto;
  z-index: 50;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
  display: flex;
  flex-direction: column;
}

.doc-sidebar-content {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  padding: var(--spacing-xl) 0;
}

.doc-sidebar::-webkit-scrollbar {
  width: 6px;
}

.doc-sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.doc-sidebar::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-full);
}

.doc-sidebar-section {
  margin-bottom: var(--spacing-xl);
}

.doc-sidebar-title {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-tertiary);
  padding: 0 var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

.doc-sidebar-nav {
  list-style: none;
}

.doc-sidebar-nav a {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
  margin: 2px 0;
}

.doc-sidebar-nav a:hover {
  background: linear-gradient(90deg, var(--color-primary-light) 0%, transparent 100%);
  color: var(--color-primary);
  text-decoration: none;
  border-left-color: var(--color-primary);
  padding-left: calc(var(--spacing-lg) + 4px);
}

.doc-sidebar-nav a.active {
  background: linear-gradient(90deg, var(--color-primary-light) 0%, transparent 100%);
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
  border-left-color: var(--color-primary);
}

/* Sidebar Contact Section */
.sidebar-contact {
  margin-top: var(--spacing-xs);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border-light);
}

.sidebar-contact-item {
  display: flex;
  align-items: start;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-lg);
  margin-bottom: 0.25rem;
}

.sidebar-contact-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
  opacity: 0.8;
}

.sidebar-contact-label {
  font-size: 0.6875rem;
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-tertiary);
  margin-bottom: 0.125rem;
}

.sidebar-contact-link {
  font-size: var(--font-size-xs);
  color: var(--color-primary);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-fast);
  display: inline-block;
}

.sidebar-contact-link:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

/* Main Content */
.doc-main {
  margin-left: var(--sidebar-width);
  margin-top: var(--header-height);
  flex: 1;
  min-width: 0;
}

.doc-content {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: var(--spacing-4xl) var(--spacing-xl) var(--spacing-3xl);
  overflow-x: hidden;
  width: 100%;
}

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  margin-bottom: var(--spacing-xl);
  margin-top: var(--spacing-md);
  flex-wrap: wrap;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-bg-alt);
  border-radius: var(--radius-full);
  width: fit-content;
}

.breadcrumbs a {
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
}

.breadcrumbs a:hover {
  color: var(--color-primary);
}

.breadcrumbs-separator {
  color: var(--color-text-tertiary);
  font-size: var(--font-size-xs);
}

/* ============================================
   Hero Section
   ============================================ */

.hero-section {
  text-align: center;
  padding: var(--spacing-4xl) 0 var(--spacing-3xl);
  position: relative;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

.hero-title {
  font-family: var(--font-family-display);
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-extrabold);
  margin-bottom: var(--spacing-lg);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto var(--spacing-2xl);
  line-height: var(--line-height-relaxed);
}

/* ============================================
   Cards - Premium Design
   ============================================ */

.card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-lg), 0 0 0 2px var(--color-primary-light);
  border-color: var(--color-primary);
}

.card:hover::before {
  opacity: 1;
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  font-size: 1.75rem;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.card:hover .card-icon {
  transform: scale(1.1) rotate(-5deg);
  box-shadow: var(--shadow-lg);
}

.card-icon.blue { background: var(--gradient-primary); }
.card-icon.purple { background: linear-gradient(135deg, #8b5cf6 0%, #a78bfa 100%); }
.card-icon.green { background: var(--gradient-success); }
.card-icon.orange { background: var(--gradient-warm); }
.card-icon.cyan { background: var(--gradient-secondary); }
.card-icon.pink { background: var(--gradient-accent); }
.card-icon.gray { background: linear-gradient(135deg, #64748b 0%, #94a3b8 100%); }

.card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.card-description {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin-bottom: 0;
  line-height: var(--line-height-relaxed);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-md);
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  transition: all var(--transition-fast);
}

.card-link:hover {
  gap: var(--spacing-sm);
}

.card-link::after {
  content: '→';
  transition: transform var(--transition-fast);
}

.card:hover .card-link::after {
  transform: translateX(4px);
}

/* Disabled Card */
.card.disabled {
  opacity: 0.6;
  pointer-events: none;
}

.card.disabled .card-icon {
  filter: grayscale(100%);
}

/* Card Grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

/* ============================================
   Callout Boxes - Modern Design
   ============================================ */

.callout {
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  border-left: 4px solid;
  margin: var(--spacing-lg) 0;
  position: relative;
  overflow: hidden;
}

.callout::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 100%;
  opacity: 0.03;
  pointer-events: none;
}

.callout-title {
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-base);
}

.callout-content {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
}

.callout-content p:last-child {
  margin-bottom: 0;
}

.callout-info {
  border-left-color: var(--color-info);
  background: linear-gradient(135deg, var(--color-info-light) 0%, rgba(139, 92, 246, 0.05) 100%);
}

.callout-info .callout-title { color: var(--color-info); }

.callout-success {
  border-left-color: var(--color-success);
  background: linear-gradient(135deg, var(--color-success-light) 0%, rgba(16, 185, 129, 0.05) 100%);
}

.callout-success .callout-title { color: var(--color-success); }

.callout-warning {
  border-left-color: var(--color-warning);
  background: linear-gradient(135deg, var(--color-warning-light) 0%, rgba(245, 158, 11, 0.05) 100%);
}

.callout-warning .callout-title { color: var(--color-warning); }

.callout-danger {
  border-left-color: var(--color-danger);
  background: linear-gradient(135deg, var(--color-danger-light) 0%, rgba(239, 68, 68, 0.05) 100%);
}

.callout-danger .callout-title { color: var(--color-danger); }

/* ============================================
   Lists & Steps
   ============================================ */

ul, ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
}

ul li, ol li {
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height-relaxed);
  padding-left: var(--spacing-xs);
}

/* Steps List - Premium */
.steps {
  counter-reset: step-counter;
  list-style: none;
  margin-left: 0;
  position: relative;
}

.steps::before {
  content: '';
  position: absolute;
  left: 17px;
  top: 40px;
  bottom: 20px;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-info));
  border-radius: var(--radius-full);
}

.steps > li {
  counter-increment: step-counter;
  position: relative;
  padding-left: var(--spacing-3xl);
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-md);
}

.steps > li::before {
  content: counter(step-counter);
  position: absolute;
  left: 0;
  top: 0;
  width: 36px;
  height: 36px;
  background: var(--gradient-primary);
  color: white;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-sm);
  box-shadow: var(--shadow-md), 0 0 20px rgba(59, 130, 246, 0.3);
  z-index: 1;
}

.steps > li:last-child {
  margin-bottom: 0;
}

/* ============================================
   Tables - Modern Design
   ============================================ */

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
}

thead {
  background: var(--gradient-primary);
}

th {
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: left;
  font-weight: var(--font-weight-semibold);
  color: white;
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

td {
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text-secondary);
}

tbody tr {
  transition: all var(--transition-fast);
}

tbody tr:hover {
  background: var(--color-primary-light);
}

tbody tr:last-child td {
  border-bottom: none;
}

/* ============================================
   Buttons - Premium Design
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  text-align: center;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left var(--transition-slow);
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-md), 0 4px 14px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: var(--shadow-lg), 0 8px 28px rgba(8, 145, 178, 0.4);
  color: white;
  text-decoration: none;
}

.btn-secondary {
  background: var(--color-bg-elevated);
  color: var(--color-text);
  border: 2px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-light);
  text-decoration: none;
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-base);
  border-radius: var(--radius-lg);
}

/* ============================================
   Search - Premium Design
   ============================================ */

.search-wrapper {
  margin-left: auto;
  max-width: 400px;
  flex: 1;
  position: relative;
}

.search-input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-lg);
  padding-left: var(--spacing-2xl);
  border: 2px solid var(--color-border-light);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  background: var(--color-bg-alt);
  color: var(--color-text);
}

.search-input::placeholder {
  color: var(--color-text-tertiary);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
  background: var(--color-bg);
}

.search-wrapper::before {
  content: '🔍';
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  font-size: var(--font-size-sm);
  pointer-events: none;
}

/* ============================================
   Quick Start Section
   ============================================ */

.quick-start {
  margin-top: var(--spacing-3xl);
  padding: var(--spacing-2xl);
  background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-primary-light) 100%);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-light);
  position: relative;
  overflow: hidden;
}

.quick-start::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.quick-start h2 {
  margin-top: 0;
  border: none;
  padding: 0;
}

.quick-start h2::after {
  display: none;
}

/* ============================================
   Feature Grid
   ============================================ */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.feature-item {
  padding: var(--spacing-lg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
  background: var(--color-bg-elevated);
}

.feature-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.feature-item h4 {
  margin-top: 0;
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.feature-item p {
  font-size: var(--font-size-sm);
  margin: 0;
}

/* ============================================
   Popular Links
   ============================================ */

.popular-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.popular-link {
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  text-decoration: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.popular-link:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  transform: translateX(4px);
  text-decoration: none;
}

.popular-link span:first-child {
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
}

.popular-link span:last-child {
  color: var(--color-primary);
  font-size: var(--font-size-lg);
  transition: transform var(--transition-fast);
}

.popular-link:hover span:last-child {
  transform: translateX(4px);
}

/* ============================================
   Footer
   ============================================ */

.doc-footer {
  border-top: 1px solid var(--color-border-light);
  padding: var(--spacing-2xl) 0;
  margin-top: var(--spacing-4xl);
  text-align: center;
  color: var(--color-text-tertiary);
  font-size: var(--font-size-sm);
  background: var(--color-bg-alt);
}

.doc-footer p:first-child {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
}

/* ============================================
   Tab System - Premium
   ============================================ */

.tabs-container {
  margin: var(--spacing-2xl) 0;
}

.tabs-header {
  display: flex;
  gap: var(--spacing-xs);
  background: var(--color-bg-alt);
  padding: var(--spacing-xs);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
  overflow-x: auto;
}

.tab-button {
  background: none;
  border: none;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.tab-button:hover {
  color: var(--color-text);
  background: var(--color-bg-elevated);
}

.tab-button.active {
  color: white;
  background: var(--gradient-primary);
  box-shadow: var(--shadow-md);
}

.tab-panel {
  display: none;
  animation: fadeSlideIn 0.3s ease;
}

.tab-panel.active {
  display: block;
}

@keyframes fadeSlideIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   Collapsible Sections
   ============================================ */

.collapsible-trigger {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--transition-fast);
  margin-bottom: var(--spacing-sm);
}

.collapsible-trigger:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
}

.collapsible-trigger::after {
  content: '▼';
  font-size: var(--font-size-xs);
  transition: transform var(--transition-fast);
  color: var(--color-primary);
}

.collapsible-trigger.active {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.collapsible-trigger.active::after {
  transform: rotate(-180deg);
}

.collapsible-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
  border-left: 3px solid var(--color-primary);
  padding-left: var(--spacing-lg);
  margin-left: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.collapsible-content.open {
  max-height: none;
  padding-top: var(--spacing-md);
  padding-bottom: var(--spacing-md);
}

/* ============================================
   Dark Mode Toggle
   ============================================ */

.theme-toggle {
  background: var(--color-bg-alt);
  border: 2px solid var(--color-border-light);
  border-radius: var(--radius-full);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  font-size: 1.25rem;
  margin-left: var(--spacing-md);
}

.theme-toggle:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  transform: rotate(180deg);
}

/* ============================================
   Animations
   ============================================ */

.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in {
  opacity: 0;
  transition: opacity 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
}

.slide-in-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.slide-in-right {
  opacity: 0;
  transform: translateX(50px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.scale-in {
  opacity: 0;
  transform: scale(0.9);
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

/* Stagger animations */
.stagger-animation > * {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.stagger-animation.visible > *:nth-child(1) { transition-delay: 0.1s; }
.stagger-animation.visible > *:nth-child(2) { transition-delay: 0.2s; }
.stagger-animation.visible > *:nth-child(3) { transition-delay: 0.3s; }
.stagger-animation.visible > *:nth-child(4) { transition-delay: 0.4s; }
.stagger-animation.visible > *:nth-child(5) { transition-delay: 0.5s; }
.stagger-animation.visible > *:nth-child(6) { transition-delay: 0.6s; }

.stagger-animation.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* Floating animation */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.float-animation {
  animation: float 3s ease-in-out infinite;
}

/* Pulse animation */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.pulse-animation {
  animation: pulse 2s ease-in-out infinite;
}

/* ============================================
   Table of Contents
   ============================================ */

.toc {
  position: fixed;
  top: calc(var(--header-height) + var(--spacing-2xl));
  right: var(--spacing-xl);
  width: 240px;
  max-height: calc(100vh - var(--header-height) - var(--spacing-4xl));
  overflow-y: auto;
  padding: var(--spacing-lg);
  background: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-md);
}

.toc-title {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-tertiary);
  margin-bottom: var(--spacing-md);
}

.toc-list {
  list-style: none;
  margin: 0;
}

.toc-list a {
  display: block;
  padding: var(--spacing-xs) 0;
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
  border-left: 2px solid transparent;
  padding-left: var(--spacing-sm);
  transition: all var(--transition-fast);
  font-weight: var(--font-weight-medium);
}

.toc-list a:hover {
  color: var(--color-primary);
  text-decoration: none;
  border-left-color: var(--color-primary);
}

.toc-list a.active {
  color: var(--color-primary);
  border-left-color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
  background: var(--color-primary-light);
  margin-left: -var(--spacing-sm);
  padding-left: var(--spacing-md);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 1280px) {
  .toc {
    display: none;
  }
}

@media (max-width: 1024px) {
  :root {
    --sidebar-width: 260px;
  }

  .hero-title {
    font-size: var(--font-size-4xl);
  }
}

@media (max-width: 768px) {
  :root {
    --sidebar-width: 0;
    --header-height: auto;
  }

  /* Header responsive layout */
  .doc-header {
    padding: 0.75rem 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
    width: 100%;
    max-width: 100vw;
    overflow-x: hidden;
    box-sizing: border-box;
  }

  .doc-logo {
    order: 1;
    font-size: var(--font-size-lg);
    flex-shrink: 1;
    min-width: 0;
  }

  .doc-logo img {
    height: 48px !important;
    margin-right: 8px !important;
  }

  .mobile-menu-btn {
    order: 0;
    margin-right: 0.5rem;
    flex-shrink: 0;
  }

  .theme-toggle {
    order: 2;
    margin-left: auto;
    padding: 0.5rem;
    font-size: 1.25rem;
    flex-shrink: 0;
  }

  .search-wrapper {
    order: 3;
    width: 100%;
    flex: 1 1 100%;
    max-width: 100%;
    margin: 0;
  }

  .search-input {
    font-size: var(--font-size-sm);
    padding: 0.5rem 1rem;
    padding-left: 2.5rem;
    width: 100%;
    box-sizing: border-box;
  }

  .doc-sidebar {
    transform: translateX(-100%);
    width: 280px;
    transition: transform 0.3s cubic-bezier(0.4, 0.0, 0.2, 1),
                box-shadow 0.3s ease;
    top: 0;
    height: 100vh;
    will-change: transform;
  }

  .doc-sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-xl);
  }

  /* Animate sidebar items when opening */
  .doc-sidebar.open .doc-sidebar-nav a,
  .doc-sidebar.open .sidebar-contact-item {
    animation: slideInFromLeft 0.4s ease-out backwards;
  }

  .doc-sidebar.open .doc-sidebar-nav a:nth-child(1) { animation-delay: 0.05s; }
  .doc-sidebar.open .doc-sidebar-nav a:nth-child(2) { animation-delay: 0.08s; }
  .doc-sidebar.open .doc-sidebar-nav a:nth-child(3) { animation-delay: 0.11s; }
  .doc-sidebar.open .doc-sidebar-nav a:nth-child(4) { animation-delay: 0.14s; }
  .doc-sidebar.open .doc-sidebar-nav a:nth-child(5) { animation-delay: 0.17s; }
  .doc-sidebar.open .doc-sidebar-nav a:nth-child(6) { animation-delay: 0.20s; }
  .doc-sidebar.open .doc-sidebar-nav a:nth-child(7) { animation-delay: 0.23s; }
  .doc-sidebar.open .doc-sidebar-nav a:nth-child(8) { animation-delay: 0.26s; }
  .doc-sidebar.open .doc-sidebar-nav a:nth-child(9) { animation-delay: 0.29s; }
  .doc-sidebar.open .doc-sidebar-nav a:nth-child(10) { animation-delay: 0.32s; }

  .doc-sidebar.open .sidebar-contact-item:nth-child(1) { animation-delay: 0.35s; }
  .doc-sidebar.open .sidebar-contact-item:nth-child(2) { animation-delay: 0.38s; }
  .doc-sidebar.open .sidebar-contact-item:nth-child(3) { animation-delay: 0.41s; }

  @keyframes slideInFromLeft {
    from {
      opacity: 0;
      transform: translateX(-20px);
    }
    to {
      opacity: 1;
      transform: translateX(0);
    }
  }

  /* Mobile menu overlay */
  .sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 49;
    opacity: 0;
    transition: opacity 0.3s ease;
  }

  .sidebar-overlay.active {
    display: block;
    opacity: 1;
    animation: fadeIn 0.3s ease;
  }

  @keyframes fadeIn {
    from {
      opacity: 0;
    }
    to {
      opacity: 1;
    }
  }

  .sidebar-contact {
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
  }

  .doc-main {
    margin-left: 0;
    margin-top: 120px;
  }

  .doc-content {
    padding: var(--spacing-xl) var(--spacing-md);
  }

  .breadcrumbs {
    margin-top: var(--spacing-4xl);
  }

  .hero-title {
    font-size: var(--font-size-3xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-base);
  }

  h1 {
    font-size: var(--font-size-2xl);
  }

  h2 {
    font-size: var(--font-size-xl);
  }

  .card-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .quick-start {
    padding: var(--spacing-lg);
  }

  .steps::before {
    display: none;
  }

  /* Mobile-friendly table - Enable horizontal scroll */
  [style*="grid-template-columns"] {
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
  }

  [style*="grid-template-columns"] > div {
    min-width: max-content !important;
  }
}

/* Extra small devices (phones, less than 480px) */
@media (max-width: 480px) {
  .doc-header {
    padding: var(--spacing-xs) var(--spacing-sm);
  }

  .doc-logo img {
    height: 40px !important;
    margin-right: 8px !important;
  }

  .theme-toggle {
    font-size: 1.1rem;
    padding: var(--spacing-xs);
  }

  .search-input {
    font-size: 0.875rem;
    padding: 0.5rem 0.75rem;
    padding-left: 2rem;
  }

  .search-wrapper::before {
    left: 0.5rem;
    font-size: 0.875rem;
  }

  .doc-main {
    margin-top: 110px;
  }
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
  .doc-header,
  .doc-sidebar,
  .toc,
  .search-wrapper,
  .copy-code-btn,
  .theme-toggle {
    display: none !important;
  }

  .doc-main {
    margin-left: 0;
    margin-top: 0;
  }

  .doc-content {
    max-width: 100%;
    padding: 0;
  }

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

  .card, .callout, .quick-start {
    border: 1px solid #ccc;
    box-shadow: none;
    break-inside: avoid;
  }

  h1 {
    background: none;
    -webkit-text-fill-color: var(--color-text);
    color: var(--color-text);
  }
}

/* ============================================
   Utility Classes
   ============================================ */

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mb-md { margin-bottom: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.mt-2xl { margin-top: var(--spacing-2xl); }
.mb-2xl { margin-bottom: var(--spacing-2xl); }

.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.flex-column { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

/* Copy Code Button */
.code-block-wrapper {
  position: relative;
}

.copy-code-btn {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  opacity: 0;
}

.code-block-wrapper:hover .copy-code-btn {
  opacity: 1;
}

.copy-code-btn:hover {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  padding: var(--spacing-sm);
  cursor: pointer;
  color: var(--color-text);
}

@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

/* Smooth transitions for theme changes */
body,
.doc-header,
.doc-sidebar,
.doc-main,
.doc-content,
.card,
.callout,
pre,
code,
.btn,
.search-input {
  transition: background-color var(--transition-normal),
              color var(--transition-normal),
              border-color var(--transition-normal),
              box-shadow var(--transition-normal);
}