As someone who decidedly likes CSS I think something like this is "too clever". There are some things that should be as boring as possible. Layouts themselves are already a complex matter, so even the most boring and readable css will not be totally boring.

When I was younger I also had a phase where I liked to do things like these because I could. Nowadays I do things in a way that doesn't waste my own (or other people's) time by being too clever