body,
#login {
    background: url('/customstatic/bg.jpg') center center / cover no-repeat fixed;
}

nav{
    background:rgba(255,255,255,0.55) !important;
    backdrop-filter:blur(6px);
    border-radius:4px;
}
form{
    background:rgba(255,255,255,0.2) !important;
    backdrop-filter:blur(6px);
    border-radius:4px;
    margin:20px;
    padding:20px;
}
#listing,
.card {
    background:rgba(255,255,255,0.2) !important;
    backdrop-filter:blur(6px);
    border-radius:4px;
}