Font Size & Widget Background Color

Hello, I installed a plugin but the theme is doing the folloing: 1.Reproducing Dish Names Fonts way too large. 2. Theme is producing an unneeded grey horizontal divider line that arbitrarily divides food categories in the wrong places. How to either remove it or place it where I'd like to. 3. I have placed a Shopping Cart in a Widget. How can I make the background of this widget White, while keeping its borders with the current Orange color. Here is a link: http://bloomrestaurant.com/takeout-menu/ Thank you