.spinner {
    width: 40px;
    height: 40px;
    background-color: white;
    position: absolute;
    top: 50%;
    left: 50%;
    -webkit-animation: sk-rotateplane 1.2s infinite ease-in-out;
    animation: sk-rotateplane 1.2s infinite ease-in-out;
}

.loading {
    position: fixed;
    z-index: 999;
    height: 2em;
    width: 2em;
    overflow: show;
    margin: auto;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
}

/* Transparent Overlay */

.loading:before {
    content: '';
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(rgba(18, 156, 75, .8), rgba(18, 136, 55, .8));
    background: -webkit-radial-gradient(rgba(18, 156, 75, .8), rgba(18, 136, 55, .8));
}

@-webkit-keyframes sk-rotateplane {
    0% {
        -webkit-transform: perspective(120px)
    }
    50% {
        -webkit-transform: perspective(120px) rotateY(180deg)
    }
    100% {
        -webkit-transform: perspective(120px) rotateY(180deg) rotateX(180deg)
    }
}

@keyframes sk-rotateplane {
    0% {
        transform: perspective(120px) rotateX(0deg) rotateY(0deg);
        -webkit-transform: perspective(120px) rotateX(0deg) rotateY(0deg)
    }
    50% {
        transform: perspective(120px) rotateX(-180.1deg) rotateY(0deg);
        -webkit-transform: perspective(120px) rotateX(-180.1deg) rotateY(0deg)
    }
    100% {
        transform: perspective(120px) rotateX(-180deg) rotateY(-179.9deg);
        -webkit-transform: perspective(120px) rotateX(-180deg) rotateY(-179.9deg);
    }
}