This is neat, and I didn't spot any mistakes in my first very light skim through.
One practical nit is that the position of the "forward" button moves around depending on how long the section title is, so you have to keep chasing it. Possibly it could move to the left of the section title, so back and forward buttons are clustered together in a fixed place?
Yep! I will get that fixed. Thank you for the feedback!
If you find anything else, issues and feedback are also welcome on the issue tracking @ https://github.com/Saityi/a-tour-of-standard-ml/issues -- I'm primarily a backend engineer, and this is my first foray into frontend; even nitpicks like this are very welcome. :)
One practical nit is that the position of the "forward" button moves around depending on how long the section title is, so you have to keep chasing it. Possibly it could move to the left of the section title, so back and forward buttons are clustered together in a fixed place?