I am having a little trouble with my mobile site. The background image in the 'branding area' isn't displaying as I would like on my mobile site (but is fine on the desktop site). On the mobile site, the menu seems to be hiding the top of the image.

But, I cannot see the HTML and CSS for my mobile site to try and change this. When I go to Themes > HTML/CSS Editor, I can only see the desktop:

How can I show the mobile HTML and CSS? And do you have any advice on my background image problem on the mobile site?

Many thanks!

Melanie