Fotografie Blocks search box doesn’t display properly on small screens

Hello, I recently started making a blog using the Fotografie Blocks theme, however I noticed today when previewing the site on  a mobile device, that the search box in the header menu doesn't display properly on smaller devices. Instead of displaying over the top of the menu like it should, the menu text is still visible underneath it, creating a confusing mess. Is it possible to fix this somehow? See the link below for a screenshot: https://i.postimg.cc/zvxvnRJM/Screenshot-2026-08-05-at-15-07-44.png