.pre-loader {
    background: #111827 url(/assets/files/loading-3.gif) no-repeat center center ;
    /* background-size: 50vw; */
    background-size: clamp(15rem, 50vw, 20rem) auto;
    height: 100vh;
    width: 100vw;
    position: fixed;
    top: -1; bottom: 0; right: 0; left: 0;
    z-index: 100;
}