[Scryptonite]

I made something very similar for fun a few years ago[0] and added it to a repository called You-Dont-Need-JavaScript[1].

CSS-only for this sort if thing is totally contrived, but making it still proved to be a fun little exercise.

[0]: https://codepen.io/scryptonite/pen/oLGzdj

[1]: https://github.com/you-dont-need/You-Dont-Need-JavaScript