.preloader-layer {
    top: 0;
    left: 0;
    position: fixed;
    width: 100%;
    height: 100%;
    background-color: #f8f9fa;
    z-index: 9999;
    opacity: 0.2;
    color: #000;
    transition: background-color 1s;
}

.spinner {
    font-size: 80px;
    width: 100px;
    height: 100px;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    margin: auto;
    color:#28a745;
}

.preloader-layer.timeout {
    background-color: #fff;
}