.pulse {
    animation: pulse 0.4s normal forwards ease-in-out;
}

@keyframes pulse {
    0% {
        transform: scaleX(1.00);
        box-shadow: rgba(255, 255, 0, 0) 0 0 0 0;
    }

    50% {
        transform: scaleX(0.99);
        box-shadow: rgba(255, 255, 0, 0.3) 0 0 10px 10px;
    }

    100% {
        transform: scaleX(1.00);
        box-shadow: rgba(255, 255, 0, 0) 0 0 0 0;
    }
}