@keyframes pulse {
                    0% { box-shadow: 0 0 0 0 rgba(220, 53, 69, 0.7); }
                    70% { box-shadow: 0 0 0 10px rgba(220, 53, 69, 0); }
                    100% { box-shadow: 0 0 0 0 rgba(220, 53, 69, 0); }
                }