#projects_top_margin
{
    height: 00vw;
}
@media only screen and (max-width: 822px) and (min-width: 439px)
{ 
    #projects_top_margin
    {
        height: 19vw;
    }
}
@media only screen and (max-width: 439px)  
{
    #projects_top_margin
    {
        height: 30vw;
    }
}