body{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    background: url("moon2.jpg") rgba(255,255,255,0.3);
    background-blend-mode: multiply;
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
}
.bg-orange{
    background-color:orange;
}
@media (max-width: 991px){
    .sidebar{
        background-color: rgba(255,255,255,0.15);
        backdrop-filter:blur(10px);
    }
}