Responsive Theme: Css Touch Dropdown Help

I am implemeting an out-of-box cart responsive theme. For my menu blocks when in phone or tablet mode, I like to make it so a user does not need to touch the down arrow only, but rather the entire block header to expand / collaspe the menu block, similar to how the menu function works.

I tried to copy the class from the “default” footer items which appear to have this functionality, but it does not work with menu blocks.

Does anyone know what, how or where the css is that I need to add / modify for this to work?