Small suggestion of the bikeshed variety: I think you should strongly consider to make the top bar height the same as the one on HN. I believe there are design

Small suggestion of the bikeshed variety: I think you should strongly consider to make the top bar height the same as the one on HN. I believe there are design reasons for why it is the that specific height - symmetry, contrast, margins, leading your focus etc. That is: if you are not a professional designer and have a good reason to make it otherwise, leave the top bar as it is.