Note to the website authors: the carousel with examples is not usable on mobile - trying to scroll the code swipes away to the next item. Would be better as just a series of example blocks.
Also, black text on white background is easier to read.
And don't make your web design to complex for Firefox reader mode to work: if you do, that's a sign you're doing it wrong.
Generally, the entire site has a really nice design, at least on desktop. One of the prettiest I've seen.