/* ============================================
   CharRole Design System
   Modern, Accessible, Responsive
   ============================================ */

/* CSS Custom Properties - Design Tokens */
:root {
  /* Colors - Primary */
  --color-primary-50: #fff7ed;
  --color-primary-100: #ffedd5;
  --color-primary-200: #fed7aa;
  --color-primary-300: #fdba74;
  --color-primary-400: #fb923c;
  --color-primary-500: #f97316;
  --color-primary-600: #ea580c;
  --color-primary-700: #c2410c;
  
  /* Colors - Accent */
  --color-accent-purple: #c850c0;
  --color-accent-pink: #ff6b9d;
  --color-accent-blue: #4facfe;
  --color-accent-gold: #ffd700;
  
  /* Colors - Semantic */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;
  
  /* Background Colors */
  --bg-primary: #0a0a1a;
  --bg-secondary: #12122a;
  --bg-tertiary: #1a1a3a;
  --bg-elevated: rgba(255, 255, 255, 0.03);
  --bg-hover: rgba(255, 255, 255, 0.08);
  
  /* Text Colors */
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #6b7280;
  --text-inverse: #0a0a1a;
  
  /* Border */
  --border-color: rgba(255, 255, 255, 0.08);
  --border-width: 1px;
  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 16px;
  --border-radius-xl: 20px;
  --border-radius-full: 9999px;
  
  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  
  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 40px rgba(255, 215, 0, 0.15);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
  --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
  
  /* Z-Index Scale */
  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 300;
  --z-popover: 400;
  --z-toast: 500;
  
  /* Layout */
  --header-height: 64px;
  --chat-height: 65vh;
  --max-content-width: 800px;
  
  /* Animation */
  --animate-fade-in: fadeIn 0.3s ease;
  --animate-slide-up: slideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --animate-scale-in: scaleIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: var(--leading-normal);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Background Effects */
.app-background {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

.app-background::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(circle at 30% 30%, rgba(200, 80, 192, 0.12), transparent 50%),
    radial-gradient(circle at 70% 70%, rgba(79, 172, 254, 0.12), transparent 50%);
}

.app-background::after {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  opacity: 0.02;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
}

/* Layout Components */
.container {
  width: 100%;
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: var(--space-5) var(--space-4);
}

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

@keyframes slideUp {
  from { 
    opacity: 0;
    transform: translateY(20px);
  }
  to { 
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from { 
    opacity: 0;
    transform: scale(0.95);
  }
  to { 
    opacity: 1;
    transform: scale(1);
  }
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes typing {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-6px); opacity: 1; }
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Focus Styles */
:focus-visible {
  outline: 2px solid var(--color-accent-gold);
  outline-offset: 2px;
}

/* Selection */
::selection {
  background: rgba(255, 215, 0, 0.3);
  color: var(--text-primary);
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Print Styles */
@media print {
  .app-background,
  .chat-panel,
  .modal-overlay {
    display: none !important;
  }
}