/* ============================================
   CBT Master - CSS Variables & Design Tokens
   ============================================ */

:root {
  /* ========== Primary Colors ========== */
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --primary-glow: rgba(99, 102, 241, 0.3);
  
  /* ========== Secondary Colors ========== */
  --secondary: #10b981;
  --secondary-dark: #059669;
  --secondary-light: #34d399;
  
  /* ========== Accent Colors ========== */
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --accent-light: #fbbf24;
  
  /* ========== Background Colors ========== */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-card: rgba(30, 41, 59, 0.8);
  --bg-card-hover: rgba(51, 65, 85, 0.9);
  --bg-glass: rgba(15, 23, 42, 0.7);
  
  /* ========== Text Colors ========== */
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-dark: #64748b;
  
  /* ========== Status Colors ========== */
  --success: #22c55e;
  --success-bg: rgba(34, 197, 94, 0.15);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.15);
  --error: #ef4444;
  --error-bg: rgba(239, 68, 68, 0.15);
  --info: #3b82f6;
  --info-bg: rgba(59, 130, 246, 0.15);
  
  /* ========== Border Colors ========== */
  --border-primary: rgba(148, 163, 184, 0.2);
  --border-light: rgba(248, 250, 252, 0.1);
  --border-focus: var(--primary);
  
  /* ========== Gradients ========== */
  --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  --gradient-dark: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  --gradient-card: linear-gradient(145deg, rgba(30, 41, 59, 0.9) 0%, rgba(15, 23, 42, 0.9) 100%);
  --gradient-glow: radial-gradient(circle at 50% 0%, var(--primary-glow) 0%, transparent 50%);
  
  /* ========== Shadows ========== */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 30px var(--primary-glow);
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.25);
  
  /* ========== Typography ========== */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 'Outfit', 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Font Sizes */
  --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;
  --text-5xl: 3rem;
  
  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  
  /* Line Heights */
  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;
  
  /* ========== Spacing ========== */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  
  /* ========== 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: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
  --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  /* ========== Z-Index Scale ========== */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-tooltip: 600;
  --z-toast: 700;
  
  /* ========== Container Widths ========== */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;
}