.overlay-background {
    background-color: #000;
    opacity: .5;
    position: absolute;
}
.overlay-spinner {
    position: absolute;
    color: #fff;
    text-shadow: 0 0 5px #000;
    text-align: center;
}
.overlay {
    position: relative;
    height: 0px;
    width: 0px;
}