@keyframes pulse-shadow {
            0% { box-shadow: 0 0 0 0 rgba(14, 165, 233, 0.4); }
            70% { box-shadow: 0 0 0 20px rgba(14, 165, 233, 0); }
            100% { box-shadow: 0 0 0 0 rgba(14, 165, 233, 0); }
        }
        .breathe-shadow {
            animation: pulse-shadow 3s infinite;
        }