/* SimLab Base Styles - Unified Design System */
/* Version: 1.0.0 */

:root {
  /* Color System */
  --primary-color: #6366f1;
  --secondary-color: #8b5cf6;
  --accent-color: #06b6d4;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;
  
  /* Text Colors */
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --text-inverse: #ffffff;
  
  /* Background Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-tertiary: #f3f4f6;
  --bg-dark: #0f172a;
  --bg-dark-secondary: #1e293b;
  --bg-dark-tertiary: #334155;
  
  /* Border Colors */
  --border-color: #e5e7eb;
  --border-dark: #374151;
  
  /* Shadow System */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Spacing System */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --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: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* Dark Theme */
[data-theme="dark"] {
  --text-primary: #f9fafb;
  --text-secondary: #d1d5db;
  --text-muted: #9ca3af;
  --text-inverse: #1f2937;
  
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  
  --border-color: #374151;
  --border-dark: #4b5563;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  transition: color var(--transition-normal), background-color var(--transition-normal);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
}

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

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

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

.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .header {
  background: rgba(15, 23, 42, 0.95);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) 0;
}

.logo {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--primary-color);
}

.nav {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
}

.nav a {
  font-weight: 500;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav a:hover {
  background: var(--bg-secondary);
  color: var(--primary-color);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: var(--space-3xl) 0;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: var(--text-inverse);
}

.hero h1 {
  font-size: var(--font-size-5xl);
  margin-bottom: var(--space-lg);
  color: var(--text-inverse);
}

.hero p {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-xl);
  color: rgba(255, 255, 255, 0.9);
}

.badges {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
}

.badge {
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  padding: var(--space-sm) var(--space-md);
  border-radius: 50px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

/* Main Content */
.main {
  background: var(--bg-primary);
  border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
  margin-top: var(--space-xl);
  box-shadow: var(--shadow-xl);
}

.content {
  padding: var(--space-3xl) 0;
}

.section {
  margin-bottom: var(--space-3xl);
}

.section h2 {
  text-align: center;
  margin-bottom: var(--space-xl);
}

/* Panels */
.panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.panel:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.panel-header {
  padding: var(--space-lg);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-tertiary);
}

.panel-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.panel-body {
  padding: var(--space-lg);
}

/* Controls */
.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.control-group {
  background: var(--bg-secondary);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.control-group:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
}

.control-group label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.control-group input,
.control-group select {
  width: 100%;
  padding: var(--space-sm);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.control-group input:focus,
.control-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md) var(--space-lg);
  border: none;
  border-radius: var(--radius-lg);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--font-size-base);
}

.btn-primary {
  background: var(--primary-color);
  color: var(--text-inverse);
}

.btn-primary:hover {
  background: var(--secondary-color);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
  background: var(--bg-tertiary);
  border-color: var(--primary-color);
}

.btn-lg {
  padding: var(--space-lg) var(--space-xl);
  font-size: var(--font-size-lg);
}

/* Canvas */
.canvas-container {
  position: relative;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: var(--space-lg) 0;
  border: 1px solid var(--border-color);
}

canvas {
  width: 100%;
  height: auto;
  display: block;
  background: var(--bg-primary);
}

/* Results */
.results {
  background: var(--bg-secondary);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  margin-top: var(--space-lg);
}

.results h4 {
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

.results p {
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

/* FAQ */
.faq {
  margin-top: var(--space-3xl);
}

.faq-item {
  background: var(--bg-secondary);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-md);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
}

.faq-item strong {
  color: var(--text-primary);
  display: block;
  margin-bottom: var(--space-sm);
}

/* Footer */
.footer {
  background: var(--bg-dark);
  color: var(--text-inverse);
  padding: var(--space-3xl) 0;
  margin-top: var(--space-3xl);
}

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

.footer p {
  margin-bottom: var(--space-sm);
  color: rgba(255, 255, 255, 0.8);
}

.footer a {
  color: var(--accent-color);
}

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

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

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }

.hidden { display: none; }
.visible { display: block; }

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-md);
  }
  
  .hero h1 {
    font-size: var(--font-size-3xl);
  }
  
  .hero p {
    font-size: var(--font-size-lg);
  }
  
  .controls {
    grid-template-columns: 1fr;
  }
  
  .nav {
    flex-direction: column;
    gap: var(--space-sm);
  }
}

@media (max-width: 480px) {
  .hero {
    padding: var(--space-xl) 0;
  }
  
  .content {
    padding: var(--space-xl) 0;
  }
  
  .panel-body {
    padding: var(--space-md);
  }
  
  .control-group {
    padding: var(--space-md);
  }
}

/* Dark Mode Toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--bg-secondary);
  border-color: var(--primary-color);
}

/* Loading States */
.loading {
  opacity: 0.6;
  pointer-events: none;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid var(--border-color);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus States */
*:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Progress Indicators */
.progress-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: var(--spacing-md) 0;
}

.progress-circular {
  position: relative;
  width: 120px;
  height: 120px;
}

.progress-svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.progress-bg {
  fill: none;
  stroke: var(--bg-tertiary);
  stroke-width: 8;
}

.progress-fill {
  fill: none;
  stroke: var(--primary-color);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 283;
  stroke-dashoffset: 283;
  transition: stroke-dashoffset 0.3s ease;
}

.progress-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.progress-percentage {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.progress-label {
  display: block;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

.progress-linear {
  width: 100%;
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

.progress-bar {
  position: relative;
  width: 100%;
  height: 100%;
}

.progress-bar .progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  border-radius: 4px;
  transition: width 0.3s ease;
  width: 0%;
}

.progress-bar .progress-text {
  position: absolute;
  top: -2rem;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.progress-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.progress-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  opacity: 0.5;
  transition: opacity 0.3s ease;
}

.progress-step.active {
  opacity: 1;
}

.progress-step.completed {
  opacity: 1;
}

.progress-step.completed .step-circle {
  background: var(--success-color);
  color: white;
}

.step-circle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  transition: all 0.3s ease;
}

.step-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-align: center;
}

.progress-step.active .step-circle {
  background: var(--primary-color);
  color: white;
}

/* Progress Indicator Sizes */
.progress-small .progress-circular {
  width: 80px;
  height: 80px;
}

.progress-small .progress-percentage {
  font-size: 1.25rem;
}

.progress-large .progress-circular {
  width: 160px;
  height: 160px;
}

.progress-large .progress-percentage {
  font-size: 2rem;
}

/* Progress Indicator Colors */
.progress-primary .progress-fill,
.progress-primary .step-circle.active {
  stroke: var(--primary-color);
  background: var(--primary-color);
}

.progress-success .progress-fill,
.progress-success .step-circle.active {
  stroke: var(--success-color);
  background: var(--success-color);
}

.progress-warning .progress-fill,
.progress-warning .step-circle.active {
  stroke: var(--warning-color);
  background: var(--warning-color);
}

  .progress-error .progress-fill,
  .progress-error .step-circle.active {
    stroke: var(--error-color);
    background: var(--error-color);
  }

  /* Enhanced Animations */
  .animate-fade-in {
    animation: fadeIn 0.5s ease-in-out;
  }

  .animate-fade-out {
    animation: fadeOut 0.5s ease-in-out;
  }

  .animate-slide-in-left {
    animation: slideInLeft 0.5s ease-out;
  }

  .animate-slide-in-right {
    animation: slideInRight 0.5s ease-out;
  }

  .animate-slide-in-up {
    animation: slideInUp 0.5s ease-out;
  }

  .animate-slide-in-down {
    animation: slideInDown 0.5s ease-out;
  }

  .animate-scale-in {
    animation: scaleIn 0.3s ease-out;
  }

  .animate-scale-out {
    animation: scaleOut 0.3s ease-in;
  }

  .animate-rotate-in {
    animation: rotateIn 0.5s ease-out;
  }

  .animate-bounce-in {
    animation: bounceIn 0.6s ease-out;
  }

  .animate-pulse {
    animation: pulse 2s infinite;
  }

  .animate-spin {
    animation: spin 1s linear infinite;
  }

  .animate-wiggle {
    animation: wiggle 0.5s ease-in-out;
  }

  .animate-glow {
    animation: glow 2s ease-in-out infinite alternate;
  }

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

  .animate-shake {
    animation: shake 0.5s ease-in-out;
  }

  .animate-zoom-in {
    animation: zoomIn 0.3s ease-out;
  }

  .animate-zoom-out {
    animation: zoomOut 0.3s ease-in;
  }

  .animate-flip {
    animation: flip 0.6s ease-in-out;
  }

  .animate-roll-in {
    animation: rollIn 0.6s ease-out;
  }

  .animate-roll-out {
    animation: rollOut 0.6s ease-in;
  }

  .animate-light-speed-in {
    animation: lightSpeedIn 0.5s ease-out;
  }

  .animate-light-speed-out {
    animation: lightSpeedOut 0.5s ease-in;
  }

  .animate-jack-in-the-box {
    animation: jackInTheBox 0.6s ease-out;
  }

  .animate-hinge {
    animation: hinge 0.8s ease-in-out;
  }

  .animate-flash {
    animation: flash 1s ease-in-out;
  }

  .animate-rubber-band {
    animation: rubberBand 0.8s ease-out;
  }

  .animate-swing {
    animation: swing 1s ease-in-out;
  }

  .animate-tada {
    animation: tada 1s ease-in-out;
  }

  .animate-wobble {
    animation: wobble 1s ease-in-out;
  }

  .animate-jello {
    animation: jello 0.8s ease-in-out;
  }

  .animate-heart-beat {
    animation: heartBeat 1.3s ease-in-out infinite;
  }

  .animate-bounce-in-down {
    animation: bounceInDown 1s ease-out;
  }

  .animate-bounce-in-left {
    animation: bounceInLeft 1s ease-out;
  }

  .animate-bounce-in-right {
    animation: bounceInRight 1s ease-out;
  }

  .animate-bounce-in-up {
    animation: bounceInUp 1s ease-out;
  }

  .animate-bounce-out {
    animation: bounceOut 0.75s ease-in;
  }

  .animate-bounce-out-down {
    animation: bounceOutDown 0.75s ease-in;
  }

  .animate-bounce-out-left {
    animation: bounceOutLeft 0.75s ease-in;
  }

  .animate-bounce-out-right {
    animation: bounceOutRight 0.75s ease-in;
  }

  .animate-bounce-out-up {
    animation: bounceOutUp 0.75s ease-in;
  }

  .animate-fade-in-down {
    animation: fadeInDown 0.5s ease-out;
  }

  .animate-fade-in-left {
    animation: fadeInLeft 0.5s ease-out;
  }

  .animate-fade-in-right {
    animation: fadeInRight 0.5s ease-out;
  }

  .animate-fade-in-up {
    animation: fadeInUp 0.5s ease-out;
  }

  .animate-fade-out-down {
    animation: fadeOutDown 0.5s ease-in;
  }

  .animate-fade-out-left {
    animation: fadeOutLeft 0.5s ease-in;
  }

  .animate-fade-out-right {
    animation: fadeOutRight 0.5s ease-in;
  }

  .animate-fade-out-up {
    animation: fadeOutUp 0.5s ease-in;
  }

  .animate-flip-in-x {
    animation: flipInX 0.6s ease-out;
  }

  .animate-flip-in-y {
    animation: flipInY 0.6s ease-out;
  }

  .animate-flip-out-x {
    animation: flipOutX 0.6s ease-in;
  }

  .animate-flip-out-y {
    animation: flipOutY 0.6s ease-in;
  }

  .animate-slide-out-left {
    animation: slideOutLeft 0.5s ease-in;
  }

  .animate-slide-out-right {
    animation: slideOutRight 0.5s ease-in;
  }

  .animate-slide-out-up {
    animation: slideOutUp 0.5s ease-in;
  }

  .animate-slide-out-down {
    animation: slideOutDown 0.5s ease-in;
  }

  .animate-zoom-in-down {
    animation: zoomInDown 0.5s ease-out;
  }

  .animate-zoom-in-left {
    animation: zoomInLeft 0.5s ease-out;
  }

  .animate-zoom-in-right {
    animation: zoomInRight 0.5s ease-out;
  }

  .animate-zoom-in-up {
    animation: zoomInUp 0.5s ease-out;
  }

  .animate-zoom-out-down {
    animation: zoomOutDown 0.5s ease-in;
  }

  .animate-zoom-out-left {
    animation: zoomOutLeft 0.5s ease-in;
  }

  .animate-zoom-out-right {
    animation: zoomOutRight 0.5s ease-in;
  }

  .animate-zoom-out-up {
    animation: zoomOutUp 0.5s ease-in;
  }

  /* Keyframe Animations */
  @keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
  }

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

  @keyframes slideInLeft {
    from { transform: translateX(-100%); }
    to { transform: translateX(0); }
  }

  @keyframes slideInRight {
    from { transform: translateX(100%); }
    to { transform: translateX(0); }
  }

  @keyframes slideInUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
  }

  @keyframes slideInDown {
    from { transform: translateY(-100%); }
    to { transform: translateY(0); }
  }

  @keyframes scaleIn {
    from { transform: scale(0); }
    to { transform: scale(1); }
  }

  @keyframes scaleOut {
    from { transform: scale(1); }
    to { transform: scale(0); }
  }

  @keyframes rotateIn {
    from { transform: rotate(-200deg); opacity: 0; }
    to { transform: rotate(0deg); opacity: 1; }
  }

  @keyframes bounceIn {
    0% { transform: scale(0.3); opacity: 0; }
    50% { transform: scale(1.05); }
    70% { transform: scale(0.9); }
    100% { transform: scale(1); opacity: 1; }
  }

  @keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
  }

  @keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
  }

  @keyframes wiggle {
    0%, 7% { transform: rotateZ(0); }
    15% { transform: rotateZ(-15deg); }
    20% { transform: rotateZ(10deg); }
    25% { transform: rotateZ(-10deg); }
    30% { transform: rotateZ(6deg); }
    35% { transform: rotateZ(-4deg); }
    40%, 100% { transform: rotateZ(0); }
  }

  @keyframes glow {
    from { box-shadow: 0 0 5px var(--primary-color); }
    to { box-shadow: 0 0 20px var(--primary-color), 0 0 30px var(--primary-color); }
  }

  @keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
  }

  @keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-10px); }
    20%, 40%, 60%, 80% { transform: translateX(10px); }
  }

  @keyframes zoomIn {
    from { transform: scale(0); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
  }

  @keyframes zoomOut {
    from { transform: scale(1); opacity: 1; }
    to { transform: scale(0); opacity: 0; }
  }

  @keyframes flip {
    0% { transform: perspective(400px) rotateY(0); }
    40% { transform: perspective(400px) rotateY(-90deg); }
    60% { transform: perspective(400px) rotateY(-90deg); }
    100% { transform: perspective(400px) rotateY(0); }
  }

  @keyframes rollIn {
    from { transform: translateX(-100%) rotate(-120deg); opacity: 0; }
    to { transform: translateX(0) rotate(0deg); opacity: 1; }
  }

  @keyframes rollOut {
    from { transform: translateX(0) rotate(0deg); opacity: 1; }
    to { transform: translateX(100%) rotate(120deg); opacity: 0; }
  }

  @keyframes lightSpeedIn {
    from { transform: translateX(100%) skewX(-30deg); opacity: 0; }
    60% { transform: translateX(-20%) skewX(30deg); opacity: 1; }
    80% { transform: translateX(0) skewX(-15deg); opacity: 1; }
    100% { transform: translateX(0) skewX(0deg); opacity: 1; }
  }

  @keyframes lightSpeedOut {
    from { transform: translateX(0) skewX(0deg); opacity: 1; }
    to { transform: translateX(100%) skewX(30deg); opacity: 0; }
  }

  @keyframes jackInTheBox {
    from { transform: scale(0.1) rotate(30deg); opacity: 0; }
    50% { transform: rotate(-10deg); }
    70% { transform: rotate(3deg); }
    100% { transform: scale(1) rotate(0deg); opacity: 1; }
  }

  @keyframes hinge {
    0% { transform: rotate(0); transform-origin: top left; }
    20%, 60% { transform: rotate(80deg); transform-origin: top left; }
    40% { transform: rotate(60deg); transform-origin: top left; }
    80% { transform: rotate(60deg) translateY(0); transform-origin: top left; }
    100% { transform: translateY(700px); }
  }

  @keyframes flash {
    0%, 50%, 100% { opacity: 1; }
    25%, 75% { opacity: 0; }
  }

  @keyframes rubberBand {
    0% { transform: scale(1); }
    30% { transform: scaleX(1.25) scaleY(0.75); }
    40% { transform: scaleX(0.75) scaleY(1.25); }
    50% { transform: scaleX(1.15) scaleY(0.85); }
    65% { transform: scaleX(0.95) scaleY(1.05); }
    75% { transform: scaleX(1.05) scaleY(0.95); }
    100% { transform: scale(1); }
  }

  @keyframes swing {
    20% { transform: rotate(15deg); }
    40% { transform: rotate(-10deg); }
    60% { transform: rotate(5deg); }
    80% { transform: rotate(-5deg); }
    100% { transform: rotate(0deg); }
  }

  @keyframes tada {
    0% { transform: scale(1); }
    10%, 20% { transform: scale(0.9) rotate(-3deg); }
    30%, 50%, 70%, 90% { transform: scale(1.1) rotate(3deg); }
    40%, 60%, 80% { transform: scale(1.1) rotate(-3deg); }
    100% { transform: scale(1) rotate(0); }
  }

  @keyframes wobble {
    0% { transform: translateX(0%); }
    15% { transform: translateX(-25%) rotate(-5deg); }
    30% { transform: translateX(20%) rotate(3deg); }
    45% { transform: translateX(-15%) rotate(-3deg); }
    60% { transform: translateX(10%) rotate(2deg); }
    75% { transform: translateX(-5%) rotate(-1deg); }
    100% { transform: translateX(0%); }
  }

  @keyframes jello {
    0%, 11.1%, 100% { transform: translate3d(0, 0, 0); }
    22.2% { transform: skewX(-12.5deg) skewY(-12.5deg); }
    33.3% { transform: skewX(6.25deg) skewY(6.25deg); }
    44.4% { transform: skewX(-3.125deg) skewY(-3.125deg); }
    55.5% { transform: skewX(1.5625deg) skewY(1.5625deg); }
    66.6% { transform: skewX(-0.78125deg) skewY(-0.78125deg); }
    77.7% { transform: skewX(0.390625deg) skewY(0.390625deg); }
    88.8% { transform: skewX(-0.1953125deg) skewY(-0.1953125deg); }
  }

  @keyframes heartBeat {
    0% { transform: scale(1); }
    14% { transform: scale(1.3); }
    28% { transform: scale(1); }
    42% { transform: scale(1.3); }
    70% { transform: scale(1); }
  }

  @keyframes bounceInDown {
    0% { transform: translateY(-100%); opacity: 0; }
    60% { transform: translateY(0); opacity: 1; }
    80% { transform: translateY(-10px); }
    100% { transform: translateY(0); }
  }

  @keyframes bounceInLeft {
    0% { transform: translateX(-100%); opacity: 0; }
    60% { transform: translateX(0); opacity: 1; }
    80% { transform: translateX(-10px); }
    100% { transform: translateX(0); }
  }

  @keyframes bounceInRight {
    0% { transform: translateX(100%); opacity: 0; }
    60% { transform: translateX(0); opacity: 1; }
    80% { transform: translateX(10px); }
    100% { transform: translateX(0); }
  }

  @keyframes bounceInUp {
    0% { transform: translateY(100%); opacity: 0; }
    60% { transform: translateY(0); opacity: 1; }
    80% { transform: translateY(-10px); }
    100% { transform: translateY(0); }
  }

  @keyframes bounceOut {
    0% { transform: scale(1); }
    25% { transform: scale(0.95); }
    50% { transform: scale(1.1); }
    100% { transform: scale(0.3); opacity: 0; }
  }

  @keyframes bounceOutDown {
    0% { transform: translateY(0); }
    20% { transform: translateY(-10px); opacity: 1; }
    100% { transform: translateY(100%); opacity: 0; }
  }

  @keyframes bounceOutLeft {
    0% { transform: translateX(0); }
    20% { transform: translateX(10px); opacity: 1; }
    100% { transform: translateX(-100%); opacity: 0; }
  }

  @keyframes bounceOutRight {
    0% { transform: translateX(0); }
    20% { transform: translateX(-10px); opacity: 1; }
    100% { transform: translateX(100%); opacity: 0; }
  }

  @keyframes bounceOutUp {
    0% { transform: translateY(0); }
    20% { transform: translateY(10px); opacity: 1; }
    100% { transform: translateY(-100%); opacity: 0; }
  }

  @keyframes fadeInDown {
    from { transform: translateY(-100%); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
  }

  @keyframes fadeInLeft {
    from { transform: translateX(-100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
  }

  @keyframes fadeInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
  }

  @keyframes fadeInUp {
    from { transform: translateY(100%); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
  }

  @keyframes fadeOutDown {
    from { transform: translateY(0); opacity: 1; }
    to { transform: translateY(100%); opacity: 0; }
  }

  @keyframes fadeOutLeft {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(-100%); opacity: 0; }
  }

  @keyframes fadeOutRight {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(100%); opacity: 0; }
  }

  @keyframes fadeOutUp {
    from { transform: translateY(0); opacity: 1; }
    to { transform: translateY(-100%); opacity: 0; }
  }

  @keyframes flipInX {
    from { transform: perspective(400px) rotateX(90deg); opacity: 0; }
    40% { transform: perspective(400px) rotateX(-20deg); }
    60% { transform: perspective(400px) rotateX(10deg); opacity: 1; }
    80% { transform: perspective(400px) rotateX(-5deg); }
    to { transform: perspective(400px) rotateX(0deg); }
  }

  @keyframes flipInY {
    from { transform: perspective(400px) rotateY(90deg); opacity: 0; }
    40% { transform: perspective(400px) rotateY(-20deg); }
    60% { transform: perspective(400px) rotateY(10deg); opacity: 1; }
    80% { transform: perspective(400px) rotateY(-5deg); }
    to { transform: perspective(400px) rotateY(0deg); }
  }

  @keyframes flipOutX {
    from { transform: perspective(400px) rotateX(0deg); }
    30% { transform: perspective(400px) rotateX(-20deg); opacity: 1; }
    to { transform: perspective(400px) rotateX(90deg); opacity: 0; }
  }

  @keyframes flipOutY {
    from { transform: perspective(400px) rotateY(0deg); }
    30% { transform: perspective(400px) rotateY(-20deg); opacity: 1; }
    to { transform: perspective(400px) rotateY(90deg); opacity: 0; }
  }

  @keyframes slideOutLeft {
    from { transform: translateX(0); }
    to { transform: translateX(-100%); }
  }

  @keyframes slideOutRight {
    from { transform: translateX(0); }
    to { transform: translateX(100%); }
  }

  @keyframes slideOutUp {
    from { transform: translateY(0); }
    to { transform: translateY(-100%); }
  }

  @keyframes slideOutDown {
    from { transform: translateY(0); }
    to { transform: translateY(100%); }
  }

  @keyframes zoomInDown {
    from { transform: scale(0.1) translateY(-1000px); opacity: 0; }
    60% { transform: scale(0.475) translateY(60px); opacity: 1; }
    to { transform: scale(1) translateY(0); }
  }

  @keyframes zoomInLeft {
    from { transform: scale(0.1) translateX(-1000px); opacity: 0; }
    60% { transform: scale(0.475) translateX(10px); opacity: 1; }
    to { transform: scale(1) translateX(0); }
  }

  @keyframes zoomInRight {
    from { transform: scale(0.1) translateX(1000px); opacity: 0; }
    60% { transform: scale(0.475) translateX(-10px); opacity: 1; }
    to { transform: scale(1) translateX(0); }
  }

  @keyframes zoomInUp {
    from { transform: scale(0.1) translateY(1000px); opacity: 0; }
    60% { transform: scale(0.475) translateY(-60px); opacity: 1; }
    to { transform: scale(1) translateY(0); }
  }

  @keyframes zoomOutDown {
    from { transform: scale(1) translateY(0); opacity: 1; }
    40% { transform: scale(0.475) translateY(60px); opacity: 1; }
    to { transform: scale(0.1) translateY(1000px); opacity: 0; }
  }

  @keyframes zoomOutLeft {
    from { transform: scale(1) translateX(0); opacity: 1; }
    40% { transform: scale(0.475) translateX(-10px); opacity: 1; }
    to { transform: scale(0.1) translateX(-1000px); opacity: 0; }
  }

  @keyframes zoomOutRight {
    from { transform: scale(1) translateX(0); opacity: 1; }
    40% { transform: scale(0.475) translateX(10px); opacity: 1; }
    to { transform: scale(0.1) translateX(1000px); opacity: 0; }
  }

  @keyframes zoomOutUp {
    from { transform: scale(1) translateY(0); opacity: 1; }
    40% { transform: scale(0.475) translateY(-60px); opacity: 1; }
    to { transform: scale(0.1) translateY(-1000px); opacity: 0; }
  }

  /* Animation Utilities */
  .animate-delay-1 { animation-delay: 0.1s; }
  .animate-delay-2 { animation-delay: 0.2s; }
  .animate-delay-3 { animation-delay: 0.3s; }
  .animate-delay-4 { animation-delay: 0.4s; }
  .animate-delay-5 { animation-delay: 0.5s; }

  .animate-duration-1 { animation-duration: 0.1s; }
  .animate-duration-2 { animation-duration: 0.2s; }
  .animate-duration-3 { animation-duration: 0.3s; }
  .animate-duration-4 { animation-duration: 0.4s; }
  .animate-duration-5 { animation-duration: 0.5s; }
  .animate-duration-6 { animation-duration: 0.6s; }
  .animate-duration-7 { animation-duration: 0.7s; }
  .animate-duration-8 { animation-duration: 0.8s; }
  .animate-duration-9 { animation-duration: 0.9s; }
  .animate-duration-10 { animation-duration: 1s; }

  .animate-iteration-1 { animation-iteration-count: 1; }
  .animate-iteration-2 { animation-iteration-count: 2; }
  .animate-iteration-3 { animation-iteration-count: 3; }
  .animate-iteration-infinite { animation-iteration-count: infinite; }

  .animate-fill-forwards { animation-fill-mode: forwards; }
  .animate-fill-backwards { animation-fill-mode: backwards; }
  .animate-fill-both { animation-fill-mode: both; }

  .animate-ease-linear { animation-timing-function: linear; }
  .animate-ease-ease { animation-timing-function: ease; }
  .animate-ease-ease-in { animation-timing-function: ease-in; }
  .animate-ease-ease-out { animation-timing-function: ease-out; }
  .animate-ease-ease-in-out { animation-timing-function: ease-in-out; }
  .animate-ease-cubic-bezier { animation-timing-function: cubic-bezier(0.4, 0, 0.2, 1); }

  /* Interactive Elements */
  .interactive-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    position: relative;
    overflow: hidden;
  }

  .interactive-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
  }

  .interactive-button:not(:disabled):hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
  }

  .interactive-button:not(:disabled):active {
    transform: translateY(0);
  }

  .button-primary {
    background: var(--primary-color);
    color: white;
  }

  .button-primary:hover:not(:disabled) {
    background: var(--primary-hover);
  }

  .button-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
  }

  .button-secondary:hover:not(:disabled) {
    background: var(--bg-secondary);
  }

  .button-success {
    background: var(--success-color);
    color: white;
  }

  .button-success:hover:not(:disabled) {
    background: var(--success-hover);
  }

  .button-warning {
    background: var(--warning-color);
    color: white;
  }

  .button-warning:hover:not(:disabled) {
    background: var(--warning-hover);
  }

  .button-error {
    background: var(--error-color);
    color: white;
  }

  .button-error:hover:not(:disabled) {
    background: var(--error-hover);
  }

  .button-small {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
  }

  .button-large {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-lg);
  }

  .button-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
  }

  .interactive-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all 0.3s ease;
  }

  .interactive-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
  }

  .card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
  }

  .card-title {
    margin: 0;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
  }

  .card-toggle {
    background: none;
    border: none;
    font-size: var(--font-size-lg);
    cursor: pointer;
    color: var(--text-secondary);
    transition: color 0.3s ease;
  }

  .card-toggle:hover {
    color: var(--text-primary);
  }

  .card-body {
    padding: var(--spacing-md);
  }

  .card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--border-radius-sm);
    margin-bottom: var(--spacing-md);
  }

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

  .card-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
  }

  .interactive-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }

  .interactive-modal.modal-show {
    opacity: 1;
    visibility: visible;
  }

  .interactive-modal.modal-hide {
    opacity: 0;
    visibility: hidden;
  }

  .modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
  }

  .modal-dialog {
    position: relative;
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: 90vw;
    max-height: 90vh;
    overflow: hidden;
    transform: scale(0.9);
    transition: transform 0.3s ease;
  }

  .interactive-modal.modal-show .modal-dialog {
    transform: scale(1);
  }

  .modal-small {
    width: 400px;
  }

  .modal-medium {
    width: 600px;
  }

  .modal-large {
    width: 800px;
  }

  .modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
  }

  .modal-title {
    margin: 0;
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
  }

  .modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    cursor: pointer;
    color: var(--text-secondary);
    transition: color 0.3s ease;
  }

  .modal-close:hover {
    color: var(--text-primary);
  }

  .modal-body {
    padding: var(--spacing-lg);
    max-height: 60vh;
    overflow-y: auto;
  }

  .interactive-tooltip {
    position: absolute;
    background: var(--text-primary);
    color: var(--bg-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
    white-space: nowrap;
    z-index: 1000;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s ease;
    pointer-events: none;
  }

  .interactive-tooltip.tooltip-show {
    opacity: 1;
    transform: translateY(0);
  }

  .tooltip-top::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: var(--text-primary);
  }

  .tooltip-bottom::after {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-bottom-color: var(--text-primary);
  }

  .tooltip-left::after {
    content: '';
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    border: 5px solid transparent;
    border-left-color: var(--text-primary);
  }

  .tooltip-right::after {
    content: '';
    position: absolute;
    right: 100%;
    top: 50%;
    transform: translateY(-50%);
    border: 5px solid transparent;
    border-right-color: var(--text-primary);
  }

  .interactive-dropdown {
    position: relative;
    display: inline-block;
    width: 100%;
  }

  .dropdown-trigger {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all 0.3s ease;
  }

  .dropdown-trigger:hover {
    border-color: var(--primary-color);
  }

  .dropdown-arrow {
    transition: transform 0.3s ease;
  }

  .dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    max-height: 200px;
    overflow-y: auto;
  }

  .dropdown-search {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
  }

  .dropdown-search:focus {
    outline: none;
    border-bottom-color: var(--primary-color);
  }

  .dropdown-option {
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    transition: background-color 0.3s ease;
    color: var(--text-primary);
  }

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

  .dropdown-option.selected {
    background: var(--primary-color);
    color: white;
  }

  .dropdown-option.disabled {
    opacity: 0.6;
    cursor: not-allowed;
  }

  .interactive-slider {
    position: relative;
    width: 100%;
    margin: var(--spacing-md) 0;
  }

  .slider-track {
    position: relative;
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    cursor: pointer;
  }

  .slider-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background: var(--primary-color);
    border-radius: 4px;
    transition: width 0.3s ease;
  }

  .slider-thumb {
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: grab;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
  }

  .slider-thumb:hover {
    transform: translate(-50%, -50%) scale(1.1);
    box-shadow: var(--shadow-md);
  }

  .slider-thumb:active {
    cursor: grabbing;
  }

  .slider-thumb:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.3);
  }

  .slider-value {
    text-align: center;
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
  }

  .slider-vertical {
    height: 200px;
    width: 8px;
  }

  .slider-vertical .slider-track {
    width: 8px;
    height: 100%;
  }

  .slider-vertical .slider-fill {
    width: 100%;
    height: 0%;
    bottom: 0;
    top: auto;
  }

  .slider-vertical .slider-thumb {
    left: 50%;
    top: 0;
    transform: translate(-50%, -50%);
  }

  .slider-vertical .slider-value {
    margin-top: 0;
    margin-left: var(--spacing-md);
    display: inline-block;
  }

  /* Navigation System */
  .navigation {
    margin: var(--spacing-md) 0;
  }

  /* Breadcrumb Navigation */
  .navigation-breadcrumb {
    margin: var(--spacing-sm) 0;
  }

  .breadcrumb-list {
    display: flex;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--spacing-xs);
  }

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

  .breadcrumb-link {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
  }

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

  .breadcrumb-item.active .breadcrumb-text {
    color: var(--text-secondary);
    font-weight: 500;
  }

  .breadcrumb-separator {
    color: var(--text-tertiary);
    font-size: var(--font-size-sm);
  }

  /* Tab Navigation */
  .navigation-tabs {
    border-bottom: 1px solid var(--border-color);
  }

  .tab-list {
    display: flex;
    gap: 0;
  }

  .tab-button {
    padding: var(--spacing-sm) var(--spacing-md);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: var(--font-size-sm);
    font-weight: 500;
  }

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

  .tab-button[aria-selected="true"] {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    background: var(--bg-primary);
  }

  .tab-button:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--primary-color);
  }

  /* Sidebar Navigation */
  .navigation-sidebar {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-md);
  }

  .sidebar-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
  }

  .sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--border-radius-sm);
    transition: all 0.3s ease;
  }

  .sidebar-link:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
  }

  .sidebar-link.active {
    background: var(--primary-color);
    color: white;
  }

  .sidebar-icon {
    font-size: var(--font-size-lg);
  }

  .sidebar-text {
    font-weight: 500;
  }

  /* Pagination Navigation */
  .navigation-pagination {
    display: flex;
    justify-content: center;
    margin: var(--spacing-lg) 0;
  }

  .pagination-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .pagination-button {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    border-radius: var(--border-radius-sm);
    transition: all 0.3s ease;
    font-size: var(--font-size-sm);
  }

  .pagination-button:hover:not(:disabled) {
    background: var(--bg-secondary);
    border-color: var(--primary-color);
  }

  .pagination-button.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
  }

  .pagination-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
  }

  .pagination-button:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--primary-color);
  }

  /* Page Navigation */
  .page-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
  }

  .nav-button {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--border-radius-sm);
    transition: all 0.3s ease;
    font-weight: 500;
  }

  .nav-button:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
    transform: translateY(-1px);
  }

  .nav-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
  }

  .nav-arrow {
    font-size: var(--font-size-lg);
    font-weight: bold;
  }

  .nav-text {
    font-size: var(--font-size-sm);
  }

  /* Table of Contents */
  .table-of-contents {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
  }

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

  .toc-item {
    margin: var(--spacing-xs) 0;
  }

  .toc-item.toc-level-1 {
    margin-left: 0;
  }

  .toc-item.toc-level-2 {
    margin-left: var(--spacing-md);
  }

  .toc-item.toc-level-3 {
    margin-left: var(--spacing-lg);
  }

  .toc-item.toc-level-4 {
    margin-left: var(--spacing-xl);
  }

  .toc-link {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--border-radius-sm);
    transition: all 0.3s ease;
    font-size: var(--font-size-sm);
  }

  .toc-link:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
  }

  .toc-link.active {
    background: var(--primary-color);
    color: white;
  }

  /* Navigation Responsive */
  @media (max-width: 768px) {
    .page-navigation {
      flex-direction: column;
      gap: var(--spacing-sm);
    }

    .nav-button {
      width: 100%;
      justify-content: center;
    }

    .pagination-list {
      flex-wrap: wrap;
      justify-content: center;
    }

    .tab-list {
      flex-wrap: wrap;
    }

    .tab-button {
      flex: 1;
      min-width: 120px;
    }
  }

  /* Navigation Animations */
  .navigation-breadcrumb .breadcrumb-link {
    transition: all 0.3s ease;
  }

  .navigation-tabs .tab-button {
    transition: all 0.3s ease;
  }

  .navigation-sidebar .sidebar-link {
    transition: all 0.3s ease;
  }

  .pagination-button {
    transition: all 0.3s ease;
  }

  .nav-button {
    transition: all 0.3s ease;
  }

  .toc-link {
    transition: all 0.3s ease;
  }

  /* Navigation Focus States */
  .navigation-breadcrumb .breadcrumb-link:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
  }

  .navigation-tabs .tab-button:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
  }

  .navigation-sidebar .sidebar-link:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
  }

  .pagination-button:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
  }

  .nav-button:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
  }

  .toc-link:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
  }

/* Print Styles */
@media print {
  .header,
  .footer,
  .controls,
  .theme-toggle {
    display: none;
  }
  
  .main {
    box-shadow: none;
    border-radius: 0;
  }
  
  .panel {
    break-inside: avoid;
  }
}