[danShumway]

You shouldn't actually build your entire website in CSS -- it's going to be inaccessible no matter what because CSS isn't really for content.

But it's cool to see what's possible, mostly because learning how to overcome these challenges to use a tool in a way it shouldn't be used often requires you to learn more about how the tool works. That the tool is ill-suited is the point.

Of course, not that there isn't value in you pointing out that CSS content isn't accessible :) -- I have seen developers get tripped up by that in production settings particularly when building things like hover labels, so a reminder is always appreciated.