.breathe-effect {
            animation: breathe 4s ease-in-out infinite;
        }
        @keyframes breathe {
            0%, 100% { filter: drop-shadow(0 10px 15px rgba(0, 50, 150, 0.2)); transform: translateY(0); }
            50% { filter: drop-shadow(0 20px 25px rgba(0, 50, 150, 0.4)); transform: translateY(-10px); }
        }