/* ============================================
   THE HUMAN BRAIN ATLAS - CSS VARIABLES
   Premium Dark Scientific Aesthetic
   ============================================ */

:root {
  /* Primary Colors - Neural Palette */
  --color-bg-primary: #0a0a0f;
  --color-bg-secondary: #12121a;
  --color-bg-tertiary: #1a1a25;
  --color-bg-card: #151520;
  
  /* Accent Colors - Synaptic Electric */
  --color-accent-cyan: #00d4ff;
  --color-accent-purple: #a855f7;
  --color-accent-pink: #ec4899;
  --color-accent-blue: #3b82f6;
  --color-accent-green: #10b981;
  --color-accent-orange: #f59e0b;
  --color-accent-red: #ef4444;
  
  /* Neural Gradient Combinations */
  --gradient-neural: linear-gradient(135deg, var(--color-accent-cyan) 0%, var(--color-accent-purple) 50%, var(--color-accent-pink) 100%);
  --gradient-cortex: linear-gradient(135deg, var(--color-accent-blue) 0%, var(--color-accent-cyan) 100%);
  --gradient-memory: linear-gradient(135deg, var(--color-accent-purple) 0%, var(--color-accent-pink) 100%);
  --gradient-emotion: linear-gradient(135deg, var(--color-accent-orange) 0%, var(--color-accent-red) 100%);
  --gradient-decision: linear-gradient(135deg, var(--color-accent-green) 0%, var(--color-accent-cyan) 100%);
  
  /* Text Colors */
  --color-text-primary: #ffffff;
  --color-text-secondary: #b4b4c7;
  --color-text-muted: #6b6b7b;
  
  /* Glow Effects */
  --glow-cyan: 0 0 20px rgba(0, 212, 255, 0.5), 0 0 40px rgba(0, 212, 255, 0.3);
  --glow-purple: 0 0 20px rgba(168, 85, 247, 0.5), 0 0 40px rgba(168, 85, 247, 0.3);
  --glow-pink: 0 0 20px rgba(236, 72, 153, 0.5), 0 0 40px rgba(236, 72, 153, 0.3);
  --glow-blue: 0 0 20px rgba(59, 130, 246, 0.5), 0 0 40px rgba(59, 130, 246, 0.3);
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 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;
  --text-6xl: 3.75rem;
  --text-7xl: 4.5rem;
  --text-8xl: 6rem;
  
  /* 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;
  --space-24: 6rem;
  --space-32: 8rem;
  
  /* 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-slower: 500ms ease;
  
  /* Z-Index Scale */
  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
  --z-particles: 50;
  --z-content: 10;
  
  /* Container */
  --container-max: 1400px;
  --container-padding: 1.5rem;
}

/* Responsive Container Padding */
@media (min-width: 640px) {
  :root {
    --container-padding: 2rem;
  }
}

@media (min-width: 1024px) {
  :root {
    --container-padding: 3rem;
  }
}

@media (min-width: 1280px) {
  :root {
    --container-padding: 4rem;
  }
}