:root {
  --color-bg: #ffffff;
  --color-bg-surface: #f8fafc;
  --color-bg-surface-2: #f1f5f9;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-accent-subtle: #dbeafe;
  --color-border: #e2e8f0;
  --color-success: #16a34a;
  --color-warning: #d97706;
  --color-error: #dc2626;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', monospace;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
  --shadow-xl: 0 20px 25px rgba(0,0,0,0.1), 0 10px 10px rgba(0,0,0,0.04);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0a0f1e;
    --color-bg-surface: #111827;
    --color-bg-surface-2: #1e293b;
    --color-text: #f1f5f9;
    --color-text-muted: #94a3b8;
    --color-accent: #3b82f6;
    --color-accent-hover: #60a5fa;
    --color-accent-subtle: #1e3a5f;
    --color-border: #1e293b;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.5);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.6);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.7);
  }
}