#loader {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    background: rgba(0,0,0,0.75) url('../img/preloaders/preloader-black.svg') no-repeat center center;
    z-index: 10000;
}