Reduce vertical header size
including the two navigation bars plus the quote, but excluding the cookie bar, it occupies about 32% of my available screen space (compared to a web page displaying just text). I suggest that the quote be moved, preferably to the bottom, but floated to the top right of the content would work too, since usually this area is cleared by a short header. then, the logo could be moved to be in line with the top navigation bar. additionally, the bottom navigation bar could be moved to the left side of the screen, similar to the MediaWiki layout.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information