#splash {
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}
.lds-dual-ring {
    display: inline-block;
    width: 80px;
    height: 80px;
}
.lds-dual-ring:after {
    content: " ";
    display: block;
    width: 64px;
    height: 64px;
    margin: 8px;
    border-radius: 50%;
    border: 6px solid #595959;
    border-color: #595959 transparent #595959 transparent;
    animation: lds-dual-ring 1.2s linear infinite;
}
@keyframes lds-dual-ring {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}