How to fill the rest spaces of the maximenu ck

Dear support team,

I have made a main menu by using the maximenu ck plug-in like you can see at the jrmax55.cafe24.com/component/content/art...ghts.html?Itemid=310 ,
but, the rest spaces of the left and right of the menu are white blank space.


Could you let me know how to fill them with black?

Best Regards,
Adrien Park.

Dear support team,

I have solved this issue by myself.

Best Regards,
Adrien Park.