menu problem when left peel page

Hello
I have a left side peel page.
when the peel page is opened the titles of the main menu remain visible.
How can i correct this

I join a copy of my screen : on left side of the image : closed peel page, on right side of the image : opened peel page

thank you for help
best regards
Michel

Ok, can you please add these lines of css in the PagePeel css or template.css :

thank you very much

I have added it in the template css.
It's working great now

best regards
Michel

Great. Glad to know it solved;)