The only reason http://hugodocs.netlify.com/ have not replaced the current site is because only Steve have technical access to do that kind of upgrade.
And that is a limitation for any such effort. So until that is fixed …
http://hugodocs.netlify.com/ looks smashing and works fine on my dekstop browser. I can understand the need for mobile, but not mobile first … People do Hugo development on their desktops.
And, while I appreciate the efforts of thread starter, this theme does not pass the “desktop test”, so to speak. Even after several people have made the same remarks, it still has the same issues (sub par typography).
http://hugodocs.netlify.com/ on the other hand, looks smashing. If it has some problems with contrast or mobile: Fix that and stop starting to invent a new wheel every time you get a flat tire!