[Theme: Codium Extend] cropped header when in mobile interface

Hi everyone,

I recently switched to Codium Extend for my blog. Everything is great and works perfectly except the mobile interface where my header content looks cropped (ad banner and banner pic are cut off). Fortunately the rest of the content (blog post and other pictures) is absolutely fine.

Could anyone help me with this please? I would really like to keep this theme…

Here is my blog URL: http://www.mercredie.com

PS: i’ve found this topic but did not help unfortunately (https://wordpress.org/support/topic/theme-codium-extend-mobile-interface?replies=10), probably because it’s old and the code has changed in the meantime.