Custom background image for CF/AT/Hydro by shine-yu-student

/* ==UserStyle==
@name         Custom background image for CF/AT/Hydro
@namespace      USO Archive
@author       ShinyShine
@description    `Change the background image by editing the script and replacing the image URL with yours!`
@version        2023.8.12.1
@license        GPL-v4.0
@preprocessor   uso
==/UserStyle== */
@-moz-document domain("oiclass.com"), domain("www.luogu.com.cn"){
main
  {
    background-image: url("https://image.nemophery.repl.co/img/1691673083503-tidlp.jpeg") !important; /*Change Tthe URL To Your Background!*/
    background-size: cover !important;
    background-attachment: fixed !important;
  }
}
@-moz-document domain("oiclass.com"){
    .main{
        background-image: url("https://image.nemophery.repl.co/img/1691673083503-tidlp.jpeg") !important; /*Change Tthe URL To Your Background!*/
        background-size: cover !important;
        background-attachment: fixed !important;
    }
}
@-moz-document domain("oiclass.com"), domain("www.luogu.com.cn"){
    .columns{
        opacity:0.95;
    }
    .slideout-menu{
        opacity:0.95;
    }
}
@-moz-document domain("www.luogu.com.cn"){
    .card{
        background-color:white;
        opacity:0.9;
    }
}
@-moz-document domain("codeforces.com"){
    #body{
        width: 100%;
        height: 100%;
        background-image: url("https://image.nemophery.repl.co/img/1691673083503-tidlp.jpeg")!important;
        background-size: cover !important;
        background-attachment: fixed !important;
    }
    .content-with-sidebar,#footer{
        background-color:white;
        opacity:0.9;
    }
    .roundbox{
        opacity:0.9;
    }
}
@-moz-document domain("atcoder.jp"){
    .float-container{
        width: 100%;
        height: 100%;
        background-image: url("https://image.nemophery.repl.co/img/1691673083503-tidlp.jpeg") !important;
        background-size: cover !important;
        background-attachment: fixed !important;
    }
    #main-container{
        opacity:0.9;
    }
}