@keyframes breathing-shadow {
            0%, 100% { box-shadow: 0 10px 25px -5px rgba(59, 130, 246, 0.3), 0 8px 10px -6px rgba(59, 130, 246, 0.3); }
            50% { box-shadow: 0 25px 50px -12px rgba(59, 130, 246, 0.6), 0 12px 24px -7px rgba(59, 130, 246, 0.5); }
        }
        .animate-breathing {
            animation: breathing-shadow 4s ease-in-out infinite;
        }