Here’s my Wikipedia Viewer.
This is smooooooth! Very well done. Only thing that stood out was that the Logo/Title is off center, and since the rest of your design is so symmetrical it looks a bit off, to me at least. I 'd either center it, or put it up in the top-left.
Thanks! Yes, there is some dissonance and I tried to center the title but for me it looked worse. Maybe because of the background. But I will think about it. Thank you for your feedback!