@keyframes breathe {
            0% { box-shadow: 0 0 15px rgba(59, 130, 246, 0.4); transform: scale(1); }
            50% { box-shadow: 0 0 35px rgba(59, 130, 246, 0.7); transform: scale(1.02); }
            100% { box-shadow: 0 0 15px rgba(59, 130, 246, 0.4); transform: scale(1); }
        }
        .breathe-effect {
            animation: breathe 4s infinite ease-in-out;
        }