:root {
  /* Colors */
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-background: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-elevated: #ffffff;
  --color-border: #e2e8f0;
  --color-text-primary: #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted: #94a3b8;
  
  /* Refined Category Colors (Stronger identity) */
  --color-cat-calculators: #2563eb;
  --color-cat-business: #059669;
  --color-cat-converters: #ea580c;
  --color-cat-text-tools: #7c3aed;
  --color-cat-date-time: #4f46e5;
  --color-cat-pdf-docs: #dc2626;
  --color-cat-image-tools: #db2777;
  --color-cat-dev-tools: #0891b2;
  --color-cat-generators: #d97706;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  
  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}