:root {
    /* Colors */
    --color-light-bg: #fafafa;
    --color-light-text: #0a0a0a;
    --color-light-text-muted: #666;
    --color-light-surface: #fff;
    
    --color-dark-bg: #0a0a0a;
    --color-dark-text: #fafafa;
    --color-dark-text-muted: #999;
    --color-dark-surface: #1a1a1a;
    
    --color-error-light: #ffe5e5;
    --color-error-dark: #2a0000;
    --color-error-border-light: #ff0000;
    --color-error-border-dark: #ff4444;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 1rem;
    --font-size-large: clamp(3.5rem, 8vw, 6rem);
    --font-size-small: 0.85rem;
    --font-size-tiny: 0.7rem;
    
    /* Spacing */
    --spacing-xs: 0.6rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1.25rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Borders */
    --border-width: 2px;
    --border-radius: 0;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    
    /* Shadows */
    --shadow-offset: 4px;
}