Remove side bar

Dear KAdence Team,

I decided to show my menu in the footer only. Whilst I have found the section where to remove the sidebar in my “home” page I am unable to remove it on the “blog” page and all related. I have already moved the structure of the menu to the footer, but there is still the white space on the right hand side.

This is my website: https://www.little-hamburgers.de

Would appreciate if you can take the time!

Cheers
Kerstin