/* Claude Code - Shared Styles for Multi-Page Site */
/* Enhanced Liquid Glass UI with Navigation and Search */

:root {
  /* Color Palette - Dark Glass Theme */
  --glass-bg-primary: rgba(15, 15, 20, 0.85);
  --glass-bg-secondary: rgba(25, 25, 35, 0.75);
  --glass-bg-tertiary: rgba(35, 35, 50, 0.65);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-border-hover: rgba(255, 255, 255, 0.2);
  --glass-shadow: rgba(0, 0, 0, 0.3);
  --glass-glow: rgba(99, 102, 241, 0.3);
  
  /* Text Colors */
  --text-primary: rgba(255, 255, 255, 0.95);
  --text-secondary: rgba(255, 255, 255, 0.75);
  --text-muted: rgba(255, 255, 255, 0.55);
  --text-accent: #6366f1;
  --text-success: #10b981;
  --text-warning: #f59e0b;
  --text-error: #ef4444;
  
  /* OS Colors */
  --windows-color: #00a1f1;
  --macos-color: #8b5cf6;
  --linux-color: #f7931e;
  --debian-color: #d70a53;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, rgba(99, 102, 241, 0.2) 0%, rgba(139, 92, 246, 0.2) 100%);
  --gradient-secondary: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(99, 102, 241, 0.15) 100%);
  --gradient-accent: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --gradient-windows: linear-gradient(135deg, #00a1f1 0%, #0078d4 100%);
  --gradient-macos: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
  --gradient-linux: linear-gradient(135deg, #f7931e 0%, #ff6b35 100%);
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* Transitions */
  --transition-fast: 0.15s ease-out;
  --transition-normal: 0.3s ease-out;
  --transition-slow: 0.5s ease-out;
  --transition-glass: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-smooth: all 0.25s cubic-bezier(0.23, 1, 0.32, 1);
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  scroll-padding-top: 100px; /* Account for fixed header */
}

/* Performance optimizations */
html,
body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Hardware acceleration for animations - applied selectively */
.nav-dropdown,
.mobile-menu,
.search-results {
  will-change: transform, opacity;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #0a0a0f;
  background-image: 
    radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.06) 0%, transparent 50%);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  opacity: 1;
  position: relative;
  padding-top: 60px;
  scroll-padding-top: 80px;
}


/* Glass Container Base */
.glass {
  background: rgba(15, 15, 20, 0.9);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: 
    0 8px 32px var(--glass-shadow),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
  transition: var(--transition-glass);
  position: relative;
  overflow: hidden;
}

.glass::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  opacity: 0.5;
}

.glass:hover {
  border-color: var(--glass-border-hover);
  box-shadow: 
    0 12px 40px var(--glass-shadow),
    0 0 0 1px rgba(255, 255, 255, 0.05),
    inset 0 1px 0 rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}

/* Glass Variants */
.glass-secondary {
  background: var(--glass-bg-secondary);
}

.glass-tertiary {
  background: var(--glass-bg-tertiary);
}

.glass-glow {
  box-shadow: 
    0 8px 32px var(--glass-shadow),
    0 0 20px var(--glass-glow),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* Container and Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* Enhanced Header with Search */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 1000;
  padding: var(--space-sm) 0;
  background: rgba(10, 10, 15, 0.95);
  border-bottom: 1px solid var(--glass-border);
  transition: var(--transition-glass);
}

.header.scrolled {
  background: rgba(10, 10, 15, 0.95);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.logo:hover {
  transform: scale(1.05);
}

.nav-center {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex: 1;
  justify-content: center;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--space-md);
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.nav-link.active {
  color: var(--text-accent);
  background: rgba(99, 102, 241, 0.1);
}

/* Enhanced Navigation with Dropdowns */
.nav-item {
  position: relative;
  display: inline-block;
}

.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--glass-bg-primary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  min-width: 250px;
  backdrop-filter: blur(12px);
  box-shadow: 0 8px 32px var(--glass-shadow);
  display: none;
  z-index: 1000;
}

.nav-item:hover .nav-dropdown {
  display: block;
}

.nav-dropdown-section {
  margin-bottom: var(--space-lg);
}

.nav-dropdown-section:last-child {
  margin-bottom: 0;
}

.nav-dropdown-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-accent);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-dropdown-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
  font-size: 0.875rem;
}

.nav-dropdown-link:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.nav-dropdown-link i {
  width: 16px;
  text-align: center;
}

/* OS-Specific Navigation */
.os-nav {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
}

.os-link {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.875rem;
  transition: var(--transition-fast);
  border: 1px solid transparent;
}

.os-link.windows {
  color: var(--windows-color);
  border-color: rgba(0, 161, 241, 0.2);
}

.os-link.windows:hover {
  background: rgba(0, 161, 241, 0.1);
  border-color: rgba(0, 161, 241, 0.3);
}

.os-link.macos {
  color: var(--macos-color);
  border-color: rgba(139, 92, 246, 0.2);
}

.os-link.macos:hover {
  background: rgba(139, 92, 246, 0.1);
  border-color: rgba(139, 92, 246, 0.3);
}

.os-link.linux {
  color: var(--linux-color);
  border-color: rgba(247, 147, 30, 0.2);
}

.os-link.linux:hover {
  background: rgba(247, 147, 30, 0.1);
  border-color: rgba(247, 147, 30, 0.3);
}

.os-link.active {
  background: rgba(99, 102, 241, 0.1);
  color: var(--text-accent);
  border-color: rgba(99, 102, 241, 0.3);
}

/* Search Component */
.search-container {
  position: relative;
  display: flex;
  align-items: center;
}

.search-input {
  background: var(--glass-bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-sm) var(--space-md) var(--space-sm) 2.5rem;
  color: var(--text-primary);
  font-size: 0.875rem;
  width: 250px;
  transition: var(--transition-fast);
  backdrop-filter: blur(8px);
}

.search-input:focus {
  outline: none;
  border-color: var(--text-accent);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
  width: 300px;
}

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

.search-icon {
  position: absolute;
  left: var(--space-md);
  color: var(--text-muted);
  pointer-events: none;
}

.search-results {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--glass-bg-primary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  margin-top: var(--space-xs);
  max-height: 400px;
  overflow-y: auto;
  backdrop-filter: blur(12px);
  box-shadow: 0 8px 32px var(--glass-shadow);
  display: none;
  z-index: 1001;
}

.search-results.show {
  display: block;
}

.search-result {
  padding: var(--space-md);
  border-bottom: 1px solid var(--glass-border);
  cursor: pointer;
  transition: var(--transition-fast);
}

.search-result:hover {
  background: rgba(255, 255, 255, 0.05);
}

.search-result:last-child {
  border-bottom: none;
}

.search-result-title {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.search-result-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.search-result-category {
  font-size: 0.75rem;
  color: var(--text-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-xs);
}

/* Breadcrumbs */
.breadcrumbs {
  padding: var(--space-lg) 0 var(--space-md);
  margin-top: 80px;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  list-style: none;
  font-size: 0.875rem;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.breadcrumb-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
}

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

.breadcrumb-separator {
  color: var(--text-muted);
}

.breadcrumb-current {
  color: var(--text-primary);
  font-weight: 500;
}

/* Difficulty Indicators */
.difficulty-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.difficulty-beginner {
  background: rgba(16, 185, 129, 0.1);
  color: var(--text-success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.difficulty-intermediate {
  background: rgba(245, 158, 11, 0.1);
  color: var(--text-warning);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.difficulty-advanced {
  background: rgba(239, 68, 68, 0.1);
  color: var(--text-error);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Quick Actions */
.quick-actions {
  position: fixed;
  right: var(--space-lg);
  bottom: var(--space-lg);
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

/* Commands Button */
.commands-button {
  position: fixed;
  left: var(--space-lg);
  bottom: var(--space-lg);
  z-index: 999;
  background: rgba(25, 25, 35, 0.95);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-sm) var(--space-md);
  color: var(--text-primary);
  text-decoration: none;
  box-shadow: 0 4px 20px var(--glass-shadow);
  transition: var(--transition-glass);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.875rem;
  font-weight: 500;
}

.commands-button:hover {
  background: var(--glass-bg-secondary);
  color: var(--text-accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--glass-shadow);
  text-decoration: none;
}

.quick-action {
  width: 48px;
  height: 48px;
  background: rgba(25, 25, 35, 0.95);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-glass);
  box-shadow: 0 4px 20px var(--glass-shadow);
}

.quick-action:hover {
  background: var(--glass-bg-secondary);
  color: var(--text-accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--glass-shadow);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  border: none;
  border-radius: var(--radius-lg);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-glass);
  position: relative;
  overflow: hidden;
  font-size: 1rem;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transition: left 0.5s ease;
}

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

.btn-primary {
  background: var(--gradient-accent);
  color: white;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background: var(--glass-bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: var(--glass-bg-tertiary);
  border-color: var(--glass-border-hover);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--glass-border);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border-color: var(--glass-border-hover);
}

/* OS-Specific Buttons */
.btn-windows {
  background: var(--gradient-windows);
  color: white;
  box-shadow: 0 4px 20px rgba(0, 161, 241, 0.3);
}

.btn-windows:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 161, 241, 0.4);
}

.btn-macos {
  background: var(--gradient-macos);
  color: white;
  box-shadow: 0 4px 20px rgba(0, 122, 255, 0.3);
}

.btn-macos:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 122, 255, 0.4);
}

.btn-linux {
  background: var(--gradient-linux);
  color: white;
  box-shadow: 0 4px 20px rgba(247, 147, 30, 0.3);
}

.btn-linux:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(247, 147, 30, 0.4);
}

/* Cards */
.card {
  padding: var(--space-xl);
  height: 100%;
  transition: var(--transition-smooth);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 
    0 20px 40px var(--glass-shadow),
    0 8px 16px rgba(99, 102, 241, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.15);
  border-color: var(--glass-border-hover);
}

.card-header {
  margin-bottom: var(--space-lg);
}

.card-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.card-description {
  color: var(--text-secondary);
  line-height: 1.6;
}

.card-icon {
  width: 3rem;
  height: 3rem;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  font-size: 1.5rem;
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--space-xl);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Code Blocks */
.code-block {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin: var(--space-lg) 0;
  position: relative;
  overflow-x: auto;
  backdrop-filter: blur(8px);
  cursor: pointer;
}

.code-block::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.code-block:hover {
  border-color: var(--glass-border-hover);
}

.code-block pre {
  margin: 0;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--text-primary);
}

.code-block code {
  color: var(--text-accent);
}

.copy-indicator {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  background: var(--glass-bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.75rem;
  color: var(--text-muted);
  opacity: 0;
  transition: var(--transition-fast);
}

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

.copy-indicator.copied {
  color: var(--text-success);
  border-color: rgba(16, 185, 129, 0.3);
}

/* Tables */
.table-container {
  overflow-x: auto;
  margin: var(--space-lg) 0;
}

.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--glass-bg-secondary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  backdrop-filter: blur(8px);
}

.table th,
.table td {
  padding: var(--space-md);
  text-align: left;
  border-bottom: 1px solid var(--glass-border);
}

.table th {
  background: var(--glass-bg-tertiary);
  font-weight: 600;
  color: var(--text-primary);
}

.table td {
  color: var(--text-secondary);
}

.table tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

/* Sections */
.section {
  padding: var(--space-3xl) 0;
  scroll-margin-top: 80px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-xl);
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  scroll-margin-top: 80px;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: var(--space-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}


/* Responsive Design */
@media (max-width: 768px) {
  .container,
  .container-wide {
    padding: 0 var(--space-md);
  }
  
  .nav-center {
    display: none;
  }
  
  .nav .search-container {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .section {
    padding: var(--space-2xl) 0;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .card {
    padding: var(--space-lg);
  }
  
  .quick-actions {
    right: var(--space-md);
    bottom: var(--space-md);
  }
  
  .commands-button {
    left: var(--space-md);
    bottom: var(--space-md);
    font-size: 0.8rem;
    padding: var(--space-xs) var(--space-sm);
  }
  
  .search-input:focus {
    width: 100%;
  }
}



/* Enhanced Code Blocks */
.code-block {
  position: relative;
}

.code-block .copy-indicator {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  background: rgba(0, 0, 0, 0.7);
  color: var(--text-primary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  opacity: 0;
  transition: var(--transition-fast);
  pointer-events: none;
}

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

.code-block .copy-indicator.copied {
  background: var(--text-success);
  color: white;
}



/* Command Explanations */
.command-tooltip {
  position: relative;
  display: inline-block;
  cursor: help;
  border-bottom: 1px dotted var(--text-accent);
}

.command-tooltip .tooltip-content {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--glass-bg-primary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  font-size: 0.875rem;
  color: var(--text-primary);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-fast);
  z-index: 1000;
  backdrop-filter: blur(8px);
  box-shadow: 0 4px 12px var(--glass-shadow);
  margin-bottom: var(--space-xs);
}

.command-tooltip:hover .tooltip-content {
  opacity: 1;
  visibility: visible;
}

/* Performance Optimizations */
.lazy-load {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.lazy-load.loaded {
  opacity: 1;
  transform: translateY(0);
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--text-accent); }
.text-success { color: var(--text-success); }
.text-warning { color: var(--text-warning); }
.text-error { color: var(--text-error); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }

/* Developer Credits Footer */
.developer-footer {
  background: var(--glass-bg-primary);
  border-top: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
  padding: var(--space-2xl) 0 var(--space-lg);
  margin-top: var(--space-3xl);
}

.developer-credits {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
  gap: var(--space-xl);
}

.developer-info {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.developer-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: 2px solid var(--glass-border);
  transition: var(--transition-glass);
}

.developer-avatar:hover {
  border-color: var(--text-accent);
  transform: scale(1.05);
}

.developer-details h4 {
  color: var(--text-primary);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.developer-details p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin: 0;
}

.developer-links {
  display: flex;
  gap: var(--space-md);
}

.developer-link {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  background: var(--glass-bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: var(--transition-glass);
}

.developer-link:hover {
  background: var(--glass-bg-tertiary);
  border-color: var(--text-accent);
  color: var(--text-accent);
  transform: translateY(-2px);
}

.developer-link i {
  font-size: 1rem;
}

.developer-footer-bottom {
  text-align: center;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--glass-border);
}

.developer-footer-bottom p {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin: 0;
}

.developer-footer-bottom a {
  color: var(--text-accent);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition-fast);
}

.developer-footer-bottom a:hover {
  color: var(--text-primary);
}

/* FAQ Styles */
.faq-item {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--glass-border);
}

.faq-item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.faq-question {
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
}

.faq-answer {
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
  padding-left: var(--space-lg);
}

.faq-answer code {
  background: var(--glass-bg-tertiary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  color: var(--text-accent);
}

/* Requirements Styles */
.requirements-section {
  margin-bottom: var(--space-lg);
}

.requirements-section:last-child {
  margin-bottom: 0;
}

.requirements-title {
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.requirements-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.requirements-list li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xs) 0;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.requirements-list li i {
  width: 16px;
  text-align: center;
  flex-shrink: 0;
}

/* Responsive Developer Footer */
@media (max-width: 768px) {
  .developer-credits {
    flex-direction: column;
    text-align: center;
    gap: var(--space-lg);
  }
  
  .developer-info {
    flex-direction: column;
    text-align: center;
    gap: var(--space-md);
  }
  
  .developer-links {
    justify-content: center;
  }
  
  .faq-answer {
    padding-left: 0;
  }
}

/* Mobile Menu */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.25rem;
  cursor: pointer;
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}

.mobile-menu-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.mobile-menu {
  position: fixed;
  top: 80px;
  left: 0;
  right: 0;
  background: rgba(15, 15, 20, 0.95);
  border-bottom: 1px solid var(--glass-border);
  padding: var(--space-lg);
  z-index: 999;
  max-height: calc(100vh - 80px);
  overflow-y: auto;
  display: none;
}

.mobile-menu.show {
  display: block;
}

.mobile-nav-links {
  list-style: none;
  margin-bottom: var(--space-lg);
}

.mobile-nav-links li {
  margin-bottom: var(--space-sm);
}

.mobile-nav-links .nav-link {
  display: block;
  padding: var(--space-md);
  border-radius: var(--radius-md);
  background: var(--glass-bg-secondary);
  border: 1px solid var(--glass-border);
  transition: var(--transition-fast);
  text-decoration: none;
  color: var(--text-secondary);
}

.mobile-nav-links .nav-link:hover {
  background: var(--glass-bg-tertiary);
  border-color: var(--glass-border-hover);
  color: var(--text-primary);
}

.mobile-nav-links .nav-link.active {
  background: rgba(99, 102, 241, 0.1);
  border-color: rgba(99, 102, 241, 0.3);
  color: var(--text-accent);
}

.mobile-section {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--glass-border);
}

.mobile-os-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.mobile-search {
  position: relative;
  width: 100%;
}

.mobile-search .search-input {
  width: 100%;
  padding-left: 2.5rem;
}

.mobile-search .search-icon {
  position: absolute;
  left: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.mobile-search .search-results {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--glass-bg-primary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(12px);
  max-height: 300px;
  overflow-y: auto;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: var(--transition-glass);
}

.mobile-search .search-results.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* Search Container Enhancements */
.search-container {
  position: relative;
  transition: var(--transition-glass);
  max-width: 250px;
  min-width: 40px;
}

.search-container.collapsed {
  width: 40px;
  overflow: hidden;
}

.search-container.expanded {
  width: 250px;
}

/* Prevent header expansion */
.nav {
  align-items: center;
  min-height: 80px;
  max-height: 80px;
}

.nav-center {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: calc(100% - 300px);
}

.search-toggle {
  position: absolute;
  right: var(--space-sm);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--space-xs);
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  z-index: 10;
}

.search-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.search-input {
  padding-right: 40px;
}

/* Mobile Dropdown Navigation */
.mobile-dropdown {
  background: var(--glass-bg-secondary);
  border-radius: var(--radius-md);
  margin-top: var(--space-sm);
  padding: var(--space-md);
  border: 1px solid var(--glass-border);
}

.mobile-dropdown-section {
  margin-bottom: var(--space-md);
}

.mobile-dropdown-section:last-child {
  margin-bottom: 0;
}

.mobile-dropdown-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-accent);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.mobile-dropdown-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  font-size: 0.875rem;
}

.mobile-dropdown-link:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.mobile-dropdown-link i {
  width: 16px;
  text-align: center;
}

/* Fix icon overlap with navigation */
.section {
  padding-top: calc(var(--space-2xl) + 80px);
}

.section:first-of-type {
  padding-top: calc(var(--space-2xl) + 100px);
}

/* Responsive Design */
@media (max-width: 768px) {
  .container,
  .container-wide {
    padding: 0 var(--space-md);
  }
  
  .nav-center {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .search-container {
    display: flex;
    align-items: center;
  }
  
  .search-container.collapsed {
    width: 40px;
  }
  
  .search-container.expanded {
    width: 200px;
  }
  
  .hero {
    padding: 6rem 0 3rem;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .section {
    padding: var(--space-2xl) 0;
    padding-top: calc(var(--space-2xl) + 60px);
  }
  
  .section:first-of-type {
    padding-top: calc(var(--space-2xl) + 80px);
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .card {
    padding: var(--space-lg);
  }
  
  .nav-dropdown {
    display: none !important;
  }
  
  /* Mobile dropdown functionality */
  .mobile-nav-links .nav-link {
    cursor: pointer;
  }
  
  .mobile-dropdown {
    display: none;
  }
  
  .mobile-dropdown.show {
    display: block;
  }
}

.p-sm { padding: var(--space-sm); }
.p-md { padding: var(--space-md); }
.p-lg { padding: var(--space-lg); }
.p-xl { padding: var(--space-xl); }
.p-2xl { padding: var(--space-2xl); }

.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }

.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }

.justify-center { justify-content: center; }
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }

.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

.w-full { width: 100%; }
.h-full { height: 100%; }

.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }

.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }
.z-40 { z-index: 40; }
.z-50 { z-index: 50; }

/* Animations */

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* Selection */
::selection {
  background: rgba(99, 102, 241, 0.3);
  color: var(--text-primary);
}

::-moz-selection {
  background: rgba(99, 102, 241, 0.3);
  color: var(--text-primary);
}

/* Category Navigation */
.category-nav-section {
  padding: var(--space-2xl) 0;
  background: rgba(15, 15, 20, 0.5);
}

.category-nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.category-card {
  background: var(--glass-bg-primary);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-decoration: none;
  color: var(--text-primary);
  transition: var(--transition-glass);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  min-height: 180px;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  opacity: 0.5;
}

.category-card:hover {
  border-color: var(--glass-border-hover);
  transform: translateY(-4px);
  box-shadow: 
    0 12px 40px var(--glass-shadow),
    0 0 0 1px rgba(255, 255, 255, 0.05),
    inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.category-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  transition: var(--transition-normal);
}

.category-card:hover .category-icon {
  transform: scale(1.1);
  background: var(--gradient-accent);
}

.category-icon i {
  font-size: 1.5rem;
  color: var(--text-primary);
}

.category-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 var(--space-sm) 0;
  color: var(--text-primary);
}

.category-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.5;
}

@media (max-width: 768px) {
  .category-nav-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  
  .category-card {
    min-height: 140px;
    padding: var(--space-md);
  }
  
  .category-icon {
    width: 50px;
    height: 50px;
  }
  
  .category-icon i {
    font-size: 1.25rem;
  }
}

/* Warning Card Styles */
.warning-card {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.1) 0%, rgba(251, 191, 36, 0.05) 100%);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.1);
  position: relative;
  overflow: hidden;
}

.warning-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--text-warning) 0%, #fbbf24 100%);
}

.warning-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background: rgba(245, 158, 11, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-warning);
  font-size: 1.25rem;
}

.warning-content h4 {
  color: var(--text-warning);
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0 0 var(--space-sm) 0;
}

.warning-content p {
  color: var(--text-primary);
  margin: 0 0 var(--space-sm) 0;
  line-height: 1.6;
}

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

.warning-content code {
  background: rgba(245, 158, 11, 0.2);
  color: var(--text-warning);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
}

.example-box {
  margin-top: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.example-correct,
.example-incorrect {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  line-height: 1.5;
}

.example-correct {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--text-success);
}

.example-correct code {
  background: rgba(16, 185, 129, 0.2);
  color: var(--text-success);
}

.example-incorrect {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: var(--text-error);
}

.example-incorrect code {
  background: rgba(239, 68, 68, 0.2);
  color: var(--text-error);
}

@media (max-width: 768px) {
  .warning-card {
    flex-direction: column;
    text-align: center;
  }
  
  .warning-icon {
    align-self: center;
  }
}

/* Language Switch Styles */
.language-switch {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  background: var(--glass-bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-xs);
  margin-left: var(--space-md);
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-fast);
  min-width: 2rem;
  text-align: center;
}

.lang-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.1);
}

.lang-btn.active {
  color: var(--text-accent);
  background: rgba(99, 102, 241, 0.2);
  border: 1px solid rgba(99, 102, 241, 0.3);
}

/* Language-specific font adjustments */
.lang-zh {
  font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

.lang-zh .section-title {
  font-weight: 600;
  letter-spacing: 0.05em;
}

.lang-zh .nav-link {
  font-weight: 500;
}

.lang-zh .card-title {
  font-weight: 600;
  letter-spacing: 0.02em;
}

.lang-zh .btn {
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* Mobile language switch */
@media (max-width: 768px) {
  .language-switch {
    margin-left: 0;
    margin-bottom: var(--space-md);
  }
  
  .mobile-menu .language-switch {
    width: 100%;
    justify-content: center;
    margin-bottom: var(--space-lg);
  }
  
  .lang-btn {
    flex: 1;
    min-width: 3rem;
  }
}

/* Language-specific spacing adjustments */
.lang-zh .hero h1 {
  line-height: 1.3;
}

.lang-zh .section-title {
  line-height: 1.4;
}

.lang-zh .card-description {
  line-height: 1.7;
}

/* Smooth language switch transitions */
[data-lang] {
  transition: opacity 0.2s ease-in-out;
}

.language-switching [data-lang] {
  opacity: 0.7;
}

/* RTL support (if needed for future expansions) */
[dir="rtl"] .language-switch {
  margin-left: 0;
  margin-right: var(--space-md);
}

[dir="rtl"] .nav-dropdown {
  left: auto;
  right: 0;
}

[dir="rtl"] .search-results {
  left: auto;
  right: 0;
}

/* Global language synchronization */
body.lang-zh .language-switch .lang-btn[data-lang="zh"] {
  background: rgba(99, 102, 241, 0.15);
  color: var(--text-accent);
  border-color: rgba(99, 102, 241, 0.3);
  font-weight: 600;
}

body.lang-en .language-switch .lang-btn[data-lang="en"] {
  background: rgba(99, 102, 241, 0.15);
  color: var(--text-accent);
  border-color: rgba(99, 102, 241, 0.3);
  font-weight: 600;
}

/* Enhanced language switching effects */
.language-switching {
  transition: opacity 0.3s ease;
}

.language-switching * {
  transition: opacity 0.3s ease;
}

/* Cross-page language consistency */
.language-switch .lang-btn {
  position: relative;
  overflow: hidden;
}

.language-switch .lang-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transition: left 0.6s ease;
}

.language-switch .lang-btn:hover::before {
  left: 100%;
}