#particles-js{
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9;
}

#wrapper{
    width:75%;
    margin: 0 auto;
    position: relative ;
    z-index: 10;
    overflow-x: hidden;
    background-color:  rgb(26, 26, 26);
}

@media screen and (max-width:480px) {
    #particles-js{
        display: none;
    }
    #wrapper{
        width: 100%;
    }
}