:root{--bg-primary:#ffffff;--bg-secondary:#f8f8f8;--text-primary:#000000;--text-secondary:#333333;--text-muted:#666666;--border-light:#e0e0e0;--border-medium:#cccccc;--font-family-sans:-apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, sans-serif;--font-family-mono:'SF Mono', Monaco, 'Consolas', monospace;--font-normal:400;--font-medium:500;--font-semibold:600;--font-bold:700;--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;--leading-tight:1.25;--leading-normal:1.5;--leading-relaxed:1.625;--space-1:0.25rem;--space-2:0.5rem;--space-3:0.75rem;--space-4:1rem;--space-6:1.5rem;--space-8:2rem;--space-10:2.5rem;--space-12:3rem;--radius-sm:0.25rem;--radius-md:0.375rem;--radius-lg:0.5rem;--radius-xl:0.75rem;--container-sm:640px;--container-md:768px;--container-lg:1024px;--shadow-sm:0 1px 2px rgba(0, 0, 0, 0.1);--shadow-md:0 4px 6px rgba(0, 0, 0, 0.1);--shadow-lg:0 10px 15px rgba(0, 0, 0, 0.1);--transition-fast:150ms ease;--transition-normal:250ms ease}[data-theme=dark]{--bg-primary:#000000;--bg-secondary:#1a1a1a;--text-primary:#ffffff;--text-secondary:#cccccc;--text-muted:#888888;--border-light:#333333;--border-medium:#444444;--shadow-sm:0 1px 2px rgba(0, 0, 0, 0.8);--shadow-md:0 4px 6px rgba(0, 0, 0, 0.8);--shadow-lg:0 10px 15px rgba(0, 0, 0, 0.8)}