mobile view menu

Hi,

first of all: I’m no professional webdesigner 🙂

I have a problem with the linked page in mobile view, however only on some devices (like Android, chrome@macOS mobile preview), some work (iOS)

The issue is that the menu button is shown at about twice as big as it should be. I cannot tell when or how this happened. Any ideas?

A side question is: how can I disable the search window in mobile view?

Thanks!
Marco

The page I need help with: [log in to see the link]