#loader {
    position: fixed;
    width: 100%;
    height: 100vh;
    margin: auto;
    background: #f8fafc;
    visibility: visible;
    z-index: 90000;
}
#loader.fadeOut{
    opacity: 0;
    visibility: hidden;
}
#spinner {
    width: 40px;
    height: 40px;
    position: absolute;
    top: calc(50% - 20px);
    left: calc(50% - 20px);
    display: none;
    color: #fff;
}