The re-design was done by Matthew Butterick [0].

IMHO it looks nice and modern, and quite readable thanks to the great typography, but there are some fair issues raised here. So I opened an issue to let them know about it [1].

[0]: https://github.com/racket/racket-lang-org/pull/28

[1]: https://github.com/racket/racket-lang-org/issues/31