#page{
    position: absolute;
    top:0px;
    left: 0px;
    width: 100%;
    height: 100%;
    z-index: 0;
    color:cornflowerblue
    
}

/*
@media (max-width: 490px) {
    #page{
        top:calc(2*var(--h_header));
        height: calc(100% - 2*var(--h_header));
    }
}
*/