mobile menu appearance, The7 template

I’m working in The7 template. When I click the mobile menu, it opens fine, but only the title of the page you’re on appears. I have created a mobile menu under Appearance>Menus, then directed to mobile menu appropriately by assigning Manage Locations>Theme Location>Assigned Menu. I just can’t see where to edit the appearance of the mobile menu. Is there a place in WP to edit the mobile menu colors and action?

Here’s what it looks like: