I think you succeeded in that balance. While I was reading it crossed my mind that even though I don't need CSS for cocoa, having both a precisely algorithmic d

I think you succeeded in that balance. While I was reading it crossed my mind that even though I don't need CSS for cocoa, having both a precisely algorithmic description in CSS and a plain-English description of the same concept really helps to internalize the content. Neither one of the two would work as well as both of them did.