I have a small but annoying issue when resizing my page below a certain horizontal resolution (I guess somewhere around 960px). The Header gets smaller and wont show my Logo(which isnt the main issue), but when i click on the Menu Button (the blue thing with the 3 lines) no dropdown Menu is shown, it seems to appear(because the code changes after clicking on it) but isn't visible. Any Ideas/Help?
Site: test2.phi.de