.lds-hourglass {
    display: inline-block;
    position: relative;
    width: 80px;
    height: 80px;
}
.lds-hourglass:after {
    content: " ";
    display: block;
    border-radius: 50%;
    width: 0;
    height: 0;
    margin: 8px;
    box-sizing: border-box;
    border: 32px solid #000000;
    border-color: #ffb500 transparent #ff8100 transparent;
    animation: lds-hourglass 1.2s infinite;
}
@keyframes lds-hourglass {
    0% {
        transform: rotate(0);
        animation-timing-function: cubic-bezier(0.55, 0.055, 0.675, 0.19);
    }
    50% {
        transform: rotate(900deg);
        animation-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
    }
    100% {
        transform: rotate(1800deg);
    }
}


/* Absolute Center Spinner */
.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(20, 20, 20,.8), rgba(0, 0, 0, .8));

    background: -webkit-radial-gradient(rgba(20, 20, 20,.8), rgba(0, 0, 0,.8));
}