Interface Recipe - Collapsible Section - Hovering Color

Hello:

I am trying to learn interfaces to create a single-page application.  I am using the Navigation (subsection) as the starting component (first image).  However, I would like to customize the interface so that when the cursor is hovering over an option, the text and background color changes.  As per the current configuration, the option (when a cursor is hovering) has a border but the text color is blue (option: Expenses in image one).  I would like to make it seem like the user-interface used in the Appian documentation page (second image).  Cursor is hovering on MODEL RECORD DATA.  I assume the collapsible feature is implemented using a!section.  Two questions:

1.  Is there an attribute or function that controls the color of the text/background when a cursor hovers? 

2.  Is a!cardLayout (other than header/billboardlayout) the only component that provides ability to control the background - noticed that a!columnsLayout doesn't and neither does a!columnLayout ?

Thank you for your help.

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