.breathe-shadow {
            animation: breathe 3.5s infinite alternate ease-in-out;
        }
        @keyframes breathe {
            0% { box-shadow: 0 10px 15px -3px rgba(59, 130, 246, 0.1), 0 4px 6px -2px rgba(59, 130, 246, 0.05); transform: translateY(0); }
            100% { box-shadow: 0 20px 25px -5px rgba(59, 130, 246, 0.3), 0 10px 10px -5px rgba(59, 130, 246, 0.1); transform: translateY(-4px); }
        }