.pre-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    background: url('images/loader-128x/Preloader_8.gif') center no-repeat #fff;
    display: flex;
    align-items: center;
    justify-content: center;
}
.pre-loader-download {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(255, 255, 255, 0.6);
    color: #000;
    font-size: 24px;
    font-weight: bold;
    z-index: 9999;
    display: none;
    justify-content: center;
    align-items: center;
    text-align: center;
}