.loading {
    width: 100%;
    height: 100%;

}

body.loading {
    overflow: hidden;
}

.processing {
    display: none;
    z-index: 1000;
    width: 100%;
    height: 100% ;
    position: fixed;
    background:
            url("/img/page-loader.gif")
            no-repeat
            50% 50%;
    top: 0;
    left: 0;
}

body.loading .processing {
    display: block;
}