Is it true that a parent element must have a fixed height to use percentage-based height? For example, 500px.
I'm designing a grid with divs arranged hierarchically. The parent has a fixed height of 500px, and the children have percentage heights, each 33.333%. These children then contain their own children, each of which I want to set to a percentage height of 100% of its parent.
Does anyone know a solution for this?