The only slightly interesting part (which is why it's hosted on css-tricks) is not even explicitly mentioned in the article at all. It's the fact that it also u

The only slightly interesting part (which is why it's hosted on css-tricks) is not even explicitly mentioned in the article at all. It's the fact that it also uses no JS, and is all CSS based. Obviously that itself isn't crazy, though back in our days it would've been harder to do with old CSS. That is, having proper navigation/sections.