@keyframes shadow-pulse {
    0% {
        box-shadow: 0 0 0 0px rgba(0, 0, 0, 0.2);
    }
    100% {
        box-shadow: 0 0 0 35px rgba(0, 0, 0, 0);
    }
}

.pulse-button {
    animation: shadow-pulse 1s infinite;
}