What a beautiful page! Two small details about it: The code blocks have overflow-x: scroll instead of overflow-x: auto, so I get an unnecessary scrollbar most of the time:
Also, the code blocks seem to have very small line height – for example, you can see how , and ] below bump into each other.
Note that on a Mac, you need to connect an external mouse or set General > Show scroll bars: always to see the unnecessary scroll bars (Windows and Linux users see it out of the box):
