.breathing-shadow {
            animation: breathe 3s infinite alternate;
        }
        @keyframes breathe {
            0% { box-shadow: 0 4px 6px -1px rgba(59, 130, 246, 0.2), 0 2px 4px -1px rgba(59, 130, 246, 0.1); }
            100% { box-shadow: 0 20px 25px -5px rgba(59, 130, 246, 0.4), 0 10px 10px -5px rgba(59, 130, 246, 0.2); }
        }