:root {
  /* Color Palette - Premium Automotive Data & Enterprise SaaS */
  --color-bg-primary: #090d16;
  --color-bg-secondary: #0f172a;
  --color-bg-tertiary: #131c31;
  --color-bg-elevated: #1e293b;
  --color-bg-card: #0d1527;
  --color-bg-card-hover: #131f38;
  
  --color-surface-white: #ffffff;
  --color-surface-light: #f8fafc;
  --color-surface-subtle: #f1f5f9;
  
  --color-border: #1e293b;
  --color-border-subtle: #19253d;
  --color-border-focus: #3b82f6;
  --color-border-light: #e2e8f0;

  --color-text-primary: #f8fafc;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;
  --color-text-light: #1e293b;
  --color-text-light-secondary: #475569;

  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-accent-light: #3b82f6;
  --color-accent-subtle: rgba(37, 99, 235, 0.12);
  --color-accent-glow: rgba(59, 130, 246, 0.25);

  --color-indigo: #4f46e5;
  --color-cyan: #06b6d4;

  --color-success: #10b981;
  --color-success-bg: rgba(16, 185, 129, 0.12);
  --color-warning: #f59e0b;
  --color-warning-bg: rgba(245, 158, 11, 0.12);
  --color-danger: #ef4444;
  --color-danger-bg: rgba(239, 68, 68, 0.12);

  /* Typography - Responsive clamp() tokens */
  --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  --font-family-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;

  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: clamp(1rem, 0.95rem + 0.25vw, 1.0625rem);
  --font-size-lg: clamp(1.125rem, 1.05rem + 0.35vw, 1.25rem);
  --font-size-xl: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
  --font-size-2xl: clamp(1.5rem, 1.35rem + 0.8vw, 1.875rem);
  --font-size-3xl: clamp(1.875rem, 1.6rem + 1.4vw, 2.375rem);
  --font-size-4xl: clamp(2.25rem, 1.85rem + 2vw, 3rem);
  --font-size-5xl: clamp(2.75rem, 2.15rem + 2.8vw, 3.875rem);

  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.15;
  --line-height-snug: 1.3;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.75;

  /* Spacing Scale */
  --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;

  /* Layout */
  --max-width-content: 1240px;
  --max-width-narrow: 840px;
  --max-width-reading: 720px;
  --header-height: 72px;

  /* Shadows & Elevation */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.2), 0 2px 4px -2px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 25px -5px rgba(37, 99, 235, 0.35);

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-Index */
  --z-negative: -1;
  --z-normal: 1;
  --z-sticky: 100;
  --z-header: 500;
  --z-mobile-drawer: 900;
  --z-modal: 1000;
  --z-toast: 1100;
}