Remove menu and such on certain page

Hi,

I’ve tried to remove the logo, main menu area and the menu toggle with codes as shown in other topics. Though somehow it doesn’t work.

I used the following code:
.page-id-3735 .a#advanced_menu_toggle { display: none !important; }
.page-id-3735 #header { display: none; }

and I tried to vary as well. Still doesn’t work.

So the purpose is to remove the entire menu area on 1 page. The menu is already hidden, but I want that entire part to be hidden so the content will be shown higher.