Regarding the fact I'm quite a beginner I would like to apologize in advance in case of my question would be obvious.. but after many search I didn't find the answer.
So I'm wondering if it's possible to have a different theme inside of the same website. Obviously I got how to change the background color of the galleries and I got how to modifiy the menu using php but I didn't get how to be able to have a changing menu.
Concretely I would simply like to have a different background menu color regarding the section I click. It is possible ? and how ?