.hvr-pulse {
    display: inline-block;
    vertical-align: middle;
    -webkit-transform: perspective(1px) translateZ(0);
    transform: perspective(1px) translateZ(0);
    box-shadow: 0 0 1px rgba(0, 0, 0, 0);
}

.hvr-pulse:hover,
.hvr-pulse:focus,
.hvr-pulse:active {
    -webkit-animation-name: hvr-pulse;
    animation-name: hvr-pulse;
    -webkit-animation-duration: 1s;
    animation-duration: 1s;
    -webkit-animation-timing-function: linear;
    animation-timing-function: linear;
    -webkit-animation-iteration-count: infinite;
    animation-iteration-count: infinite;
}