.hvr-float-shadow {
    display: inline-block;
    vertical-align: middle;
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
    box-shadow: 0 0 1px rgba(0, 0, 0, 0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
    -webkit-transition-duration: 0.3s;
    transition-duration: 0.3s;
    -webkit-transition-property: transform;
    transition-property: transform;
    margin-left: 50px;
}

.hvr-float-shadow:before {
    pointer-events: none;
    position: absolute;
    z-index: -1;
    content: '';
    top: 84%;
    left: 5%;
    height: 10px;
    width: 90%;
    opacity: 0;
    background: -webkit-radial-gradient(center, ellipse, rgba(0, 0, 0, 0.35) 0%, rgba(0, 0, 0, 0) 80%);
    background: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.35) 0%, rgba(0, 0, 0, 0) 80%);
    /* W3C */
    -webkit-transition-duration: 0.3s;
    transition-duration: 0.3s;
    -webkit-transition-property: transform, opacity;
    transition-property: transform, opacity;
}

.hvr-float-shadow:hover,
.hvr-float-shadow:focus,
.hvr-float-shadow:active {
    -webkit-transform: translateY(-5px);
    transform: translateY(-5px);
    /* move the element up by 5px */
}

.hvr-float-shadow:hover:before,
.hvr-float-shadow:focus:before,
.hvr-float-shadow:active:before {
    opacity: 1;
    -webkit-transform: translateY(5px);
    transform: translateY(5px);
    /* move the element down by 5px (it will stay in place because it's attached to the element that also moves up 5px) */
}