A max-width: 80em; is a nice readability enhancement so that users don't have to resize their browser windows after each tab change. The problem is they don't u

A max-width: 80em; is a nice readability enhancement so that users don't have to resize their browser windows after each tab change. The problem is they don't use max-width, they end up using width instead. And as you said, the forced margins are also a problem here. Also, to any designers reading this: please don't use text justification, either. I know it looks prettier as abstract art, but it does nothing but harm readability of your actual content.