Speaking of the perfectness of the HN UI, the text size is very small on mobile. I assume this must be deliberate for some reason - maybe to put people off using it on their phones :)?
It's tiny on Desktop too on a my 27" 1440p main monitor. I have it permanently zoomed in at least ~150%. There's no need for the font size to be that small in today's environment of high res monitors.
Can't reproduce, it's normal for me. Although the desktop version font does seem a bit small.