How to make a div height to fill available space

Question

I have a 3 column layout with some details below the columns.

You will not

Answer 1

The approach you made is very confusing and would make it harder to control with CSS. If you convert it to a table you'd have better results.

    



        

            

            
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Then, you need to remove float:left; from line 8 of your CSS and insert this code at the bottom.

tr#row td {
    width: 30%;
    background-color: #DDD;
    vertical-align: top;
}