/* CSS Variables for Theme System */
:root {
  /* Light Theme Colors */
  --primary-color: #6366f1;
  --primary-hover: #4f46e5;
  --secondary-color: #f1f5f9;
  --accent-color: #06b6d4;
  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-primary-alpha: rgba(99, 102, 241, 0.1);
  --accent-secondary-alpha: rgba(139, 92, 246, 0.1);
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;
  
  /* Background Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-hover: #f1f5f9;
  --bg-overlay: rgba(0, 0, 0, 0.5);
  
  /* Text Colors */
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-tertiary: #94a3b8;
  --text-inverse: #ffffff;
  --text-muted: #64748b;
  
  /* Border Colors */
  --border-primary: #e2e8f0;
  --border-secondary: #cbd5e1;
  --border-focus: #6366f1;
  
  /* Shadow Colors */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
  --shadow-glow-lg: 0 0 40px rgba(99, 102, 241, 0.4);
  
  /* Gradient Colors */
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);
  --gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #3b82f6 50%, #6366f1 100%);
  --gradient-accent: linear-gradient(135deg, #f59e0b 0%, #ef4444 50%, #ec4899 100%);
  --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --gradient-warning: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  --gradient-error: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
  
  /* 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;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
  
  /* Z-Index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-popover: 1050;
  --z-tooltip: 1060;
}

/* Dark Theme */
[data-theme="dark"] {
  /* Primary Colors (same) */
  --primary-color: #6366f1;
  --primary-hover: #4f46e5;
  --secondary-color: #1e293b;
  --accent-color: #06b6d4;
  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-primary-alpha: rgba(99, 102, 241, 0.1);
  --accent-secondary-alpha: rgba(139, 92, 246, 0.1);
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;
  
  /* Background Colors */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-card: #1e293b;
  --bg-hover: #334155;
  --bg-overlay: rgba(0, 0, 0, 0.7);
  
  /* Text Colors */
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-tertiary: #94a3b8;
  --text-inverse: #0f172a;
  --text-muted: #64748b;
  
  /* Border Colors */
  --border-primary: #334155;
  --border-secondary: #475569;
  --border-focus: #6366f1;
  
  /* Shadow Colors */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.5);
  --shadow-glow-lg: 0 0 40px rgba(99, 102, 241, 0.6);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Theme Toggle Switch - Modern Premium Design */
.theme-toggle {
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  position: relative !important;
  z-index: 10 !important;
  margin: 0 !important;
  padding: 0 !important;
}

.switch {
  position: relative !important;
  display: inline-block !important;
  width: 60px !important;
  height: 32px !important;
  margin: 0 !important;
  padding: 0 !important;
  cursor: pointer !important;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

.switch input {
  opacity: 0 !important;
  width: 0 !important;
  height: 0 !important;
  position: absolute !important;
  margin: 0 !important;
  padding: 0 !important;
}

.slider {
  position: absolute !important;
  cursor: pointer !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  bottom: 0 !important;
  background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e1 100%) !important;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1) !important;
  border-radius: 16px !important;
  border: 2px solid transparent !important;
  box-shadow: 
    0 4px 12px rgba(0, 0, 0, 0.1),
    inset 0 1px 3px rgba(0, 0, 0, 0.1) !important;
  overflow: hidden !important;
}

.slider::before {
  position: absolute !important;
  content: "" !important;
  height: 24px !important;
  width: 24px !important;
  left: 4px !important;
  bottom: 4px !important;
  background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%) !important;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1) !important;
  border-radius: 50% !important;
  box-shadow: 
    0 4px 12px rgba(0, 0, 0, 0.15),
    0 2px 4px rgba(0, 0, 0, 0.1),
    inset 0 1px 2px rgba(255, 255, 255, 0.8) !important;
  border: 1px solid rgba(0, 0, 0, 0.05) !important;
}

/* Dark Theme Styling */
[data-theme="dark"] .slider {
  background: linear-gradient(135deg, #1e293b 0%, #334155 100%) !important;
  border-color: rgba(99, 102, 241, 0.3) !important;
  box-shadow: 
    0 4px 12px rgba(0, 0, 0, 0.3),
    inset 0 1px 3px rgba(0, 0, 0, 0.2) !important;
}

[data-theme="dark"] .slider::before {
  background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%) !important;
  box-shadow: 
    0 4px 12px rgba(0, 0, 0, 0.2),
    0 2px 4px rgba(0, 0, 0, 0.1),
    inset 0 1px 2px rgba(255, 255, 255, 0.9) !important;
}

/* Checked State (Dark Mode) */
input:checked + .slider {
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%) !important;
  border-color: rgba(99, 102, 241, 0.5) !important;
  box-shadow: 
    0 6px 20px rgba(99, 102, 241, 0.3),
    inset 0 1px 3px rgba(255, 255, 255, 0.1) !important;
}

input:checked + .slider::before {
  transform: translateX(28px) !important;
  background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%) !important;
  box-shadow: 
    0 6px 16px rgba(0, 0, 0, 0.2),
    0 3px 6px rgba(0, 0, 0, 0.1),
    inset 0 1px 2px rgba(255, 255, 255, 0.9) !important;
}

[data-theme="dark"] input:checked + .slider {
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%) !important;
  border-color: rgba(99, 102, 241, 0.6) !important;
  box-shadow: 
    0 6px 20px rgba(99, 102, 241, 0.4),
    inset 0 1px 3px rgba(255, 255, 255, 0.1) !important;
}

[data-theme="dark"] input:checked + .slider::before {
  background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%) !important;
  box-shadow: 
    0 6px 16px rgba(0, 0, 0, 0.3),
    0 3px 6px rgba(0, 0, 0, 0.2),
    inset 0 1px 2px rgba(255, 255, 255, 0.9) !important;
}

/* Hover Effects */
.switch:hover .slider {
  transform: scale(1.05) !important;
  box-shadow: 
    0 6px 20px rgba(0, 0, 0, 0.15),
    inset 0 1px 3px rgba(0, 0, 0, 0.1) !important;
}

.switch:hover .slider::before {
  box-shadow: 
    0 6px 16px rgba(0, 0, 0, 0.2),
    0 3px 6px rgba(0, 0, 0, 0.1),
    inset 0 1px 2px rgba(255, 255, 255, 0.9) !important;
}

[data-theme="dark"] .switch:hover .slider {
  box-shadow: 
    0 6px 20px rgba(0, 0, 0, 0.4),
    inset 0 1px 3px rgba(0, 0, 0, 0.2) !important;
}

input:checked + .slider:hover {
  box-shadow: 
    0 8px 24px rgba(99, 102, 241, 0.4),
    inset 0 1px 3px rgba(255, 255, 255, 0.1) !important;
}

[data-theme="dark"] input:checked + .slider:hover {
  box-shadow: 
    0 8px 24px rgba(99, 102, 241, 0.5),
    inset 0 1px 3px rgba(255, 255, 255, 0.1) !important;
}

/* Active State */
.switch:active .slider {
  transform: scale(0.98) !important;
}

.switch:active .slider::before {
  transform: scale(0.95) !important;
}

input:checked + .slider:active::before {
  transform: translateX(28px) scale(0.95) !important;
}

/* Focus State */
.switch input:focus + .slider {
  outline: none !important;
  box-shadow: 
    0 4px 12px rgba(0, 0, 0, 0.1),
    inset 0 1px 3px rgba(0, 0, 0, 0.1),
    0 0 0 3px rgba(99, 102, 241, 0.2) !important;
}

input:checked + .slider:focus {
  box-shadow: 
    0 6px 20px rgba(99, 102, 241, 0.3),
    inset 0 1px 3px rgba(255, 255, 255, 0.1),
    0 0 0 3px rgba(99, 102, 241, 0.3) !important;
}

/* Navigation Controls Alignment */
.nav-controls {
  display: flex !important;
  align-items: center !important;
  gap: var(--spacing-lg) !important;
  position: relative !important;
  z-index: 10 !important;
  margin: 0 !important;
  padding: 0 !important;
}

/* Language Selector */
.language-selector {
  position: relative !important;
  display: flex !important;
  align-items: center !important;
  margin: 0 !important;
  padding: 0 !important;
}

.lang-btn {
  display: flex !important;
  align-items: center !important;
  gap: var(--spacing-sm) !important;
  padding: var(--spacing-sm) var(--spacing-md) !important;
  background: var(--bg-secondary) !important;
  border: 1px solid var(--border-primary) !important;
  border-radius: var(--radius-xl) !important;
  color: var(--text-primary) !important;
  text-decoration: none !important;
  font-size: 0.875rem !important;
  font-weight: 500 !important;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
  cursor: pointer !important;
  position: relative !important;
  z-index: 10 !important;
  margin: 0 !important;
}

.lang-btn:hover {
  background: var(--bg-tertiary) !important;
  border-color: var(--border-secondary) !important;
  transform: translateY(-1px) !important;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1) !important;
}

.globe-icon {
  width: 1rem !important;
  height: 1rem !important;
  stroke-width: 2 !important;
  flex-shrink: 0 !important;
}

.current-lang {
  font-weight: 600 !important;
  text-transform: uppercase !important;
  letter-spacing: 0.5px !important;
}

.lang-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: var(--spacing-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: var(--transition-fast);
  z-index: var(--z-dropdown);
  min-width: 150px;
}

.lang-menu.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-option {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition-fast);
  border-radius: var(--radius-sm);
  margin: var(--spacing-xs);
}

.lang-option:hover {
  background: var(--bg-secondary);
}

/* Utility Classes */
.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.hidden {
  display: none !important;
}

.visible {
  display: block !important;
}

/* Responsive Design */
@media (max-width: 768px) {
  :root {
    --spacing-md: 0.75rem;
    --spacing-lg: 1rem;
    --spacing-xl: 1.5rem;
    --spacing-2xl: 2rem;
    --spacing-3xl: 2.5rem;
  }
}

/* Print Styles */
@media print {
  * {
    background: transparent !important;
    color: black !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }
  
  a, a:visited {
    text-decoration: underline;
  }
  
  .navbar, .footer, .btn {
    display: none !important;
  }
}

/* Responsive Design for Theme Toggle */
@media (max-width: 1399px) and (min-width: 1200px) {
  .nav-controls {
    gap: var(--spacing-lg) !important;
  }
  
  .switch {
    width: 60px !important;
    height: 32px !important;
  }
}

@media (max-width: 1199px) and (min-width: 768px) {
  .nav-controls {
    gap: var(--spacing-md) !important;
  }
  
  .switch {
    width: 56px !important;
    height: 30px !important;
  }
  
  .slider::before {
    height: 22px !important;
    width: 22px !important;
    left: 4px !important;
    bottom: 4px !important;
  }
  
  input:checked + .slider::before {
    transform: translateX(26px) !important;
  }
  
  input:checked + .slider:active::before {
    transform: translateX(26px) scale(0.95) !important;
  }
  
  .lang-btn {
    padding: var(--spacing-xs) var(--spacing-sm) !important;
    font-size: 0.8rem !important;
  }
  
  .globe-icon {
    width: 0.875rem !important;
    height: 0.875rem !important;
  }
}

@media (max-width: 767px) and (min-width: 480px) {
  .nav-controls {
    gap: var(--spacing-sm) !important;
  }
  
  .switch {
    width: 52px !important;
    height: 28px !important;
  }
  
  .slider::before {
    height: 20px !important;
    width: 20px !important;
    left: 4px !important;
    bottom: 4px !important;
  }
  
  input:checked + .slider::before {
    transform: translateX(24px) !important;
  }
  
  input:checked + .slider:active::before {
    transform: translateX(24px) scale(0.95) !important;
  }
  
  .lang-btn {
    padding: var(--spacing-xs) var(--spacing-sm) !important;
    font-size: 0.75rem !important;
  }
  
  .globe-icon {
    width: 0.75rem !important;
    height: 0.75rem !important;
  }
  
  .current-lang {
    font-size: 0.7rem !important;
  }
}

@media (max-width: 479px) {
  .nav-controls {
    gap: var(--spacing-xs) !important;
  }
  
  .switch {
    width: 48px !important;
    height: 26px !important;
  }
  
  .slider::before {
    height: 18px !important;
    width: 18px !important;
    left: 4px !important;
    bottom: 4px !important;
  }
  
  input:checked + .slider::before {
    transform: translateX(22px) !important;
  }
  
  input:checked + .slider:active::before {
    transform: translateX(22px) scale(0.95) !important;
  }
  
  .lang-btn {
    padding: var(--spacing-xs) !important;
    font-size: 0.7rem !important;
  }
  
  .globe-icon {
    width: 0.7rem !important;
    height: 0.7rem !important;
  }
  
  .current-lang {
    font-size: 0.65rem !important;
  }
}

/* Touch-friendly improvements */
@media (hover: none) and (pointer: coarse) {
  .switch:hover .slider {
    transform: none !important;
  }
  
  .switch:hover .slider::before {
    box-shadow: 
      0 4px 12px rgba(0, 0, 0, 0.15),
      0 2px 4px rgba(0, 0, 0, 0.1),
      inset 0 1px 2px rgba(255, 255, 255, 0.8) !important;
  }
  
  .lang-btn:hover {
    transform: none !important;
  }
  
  /* Ensure minimum touch target size */
  .switch {
    min-height: 44px !important;
    min-width: 44px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
  }
  
  .lang-btn {
    min-height: 44px !important;
    min-width: 44px !important;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .slider {
    border-width: 2px !important;
    border-color: var(--text-primary) !important;
  }
  
  .slider::before {
    border-width: 2px !important;
    border-color: var(--text-primary) !important;
  }
  
  input:checked + .slider {
    border-color: var(--primary-color) !important;
  }
  
  .lang-btn {
    border-width: 2px !important;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .switch,
  .slider,
  .slider::before,
  .lang-btn {
    transition: none !important;
  }
  
  .switch:hover .slider,
  .switch:active .slider,
  .lang-btn:hover {
    transform: none !important;
  }
}