.overlay {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    /*background: rgba(0,0,0,.7);*/
}

.overlay__wrapper {
    width: 100%;
    height: 100%;
    position: relative;
}

.overlay__spinner {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}