CSS stacking div with variable height on two columns

Question

So I\'m working the profile page of a user on my website. And I\'m having a little problem with the CSS.

My problem is the following: I have four div boxes with a fixed

Answer 1

You can try with this code

#bottom{
    width: ???px;
    height: ???px;
    background-color: black;
}
#top{
    width:???px;
    height:???px;
    background-color:red;
    z-index: 999;
}



    
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