:root{--primary-color:#4A90E2;--primary-dark:#357ABD;--secondary-color:#6C757D;--accent-green:#28a745;--accent-red:#dc3545;--accent-yellow:#ffc107;--bg-light:#f8f9fa;--bg-card:#ffffff;--text-dark:#343a40;--text-muted:#6c757d;--border-light:#e9ecef;--spacing-xs:0.25rem;--spacing-sm:0.5rem;--spacing-md:1rem;--spacing-lg:1.5rem;--spacing-xl:2rem;--border-radius-sm:0.25rem;--border-radius-md:0.5rem;--box-shadow-sm:0 1px 3px rgba(0,0,0,0.08);--box-shadow-md:0 4px 12px rgba(0,0,0,0.1)}body{margin:0;padding:0;box-sizing:border-box}