Fruitful theme not displaying header logo correctly on mobile

Display of logo in header is OK on web, but on mobile it is greatly reduced in size. I can’t see the code on mobile version (what browser on mobile offers show code?) but it appears that any changes to height or width of image will change desktop but not mobile layout/image. Just look at desktop vs iphone to see the difference. Other themes suggested custom code to resolve a similar issue, but these are for other themes and not fruitful.

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