Venus Template - Want to open with no button highlighted


On Joomla 3.4 - Venus Template.
When the site opens up, the top left button is “selected” or “Active”. I need to make this this button not-selected until the user hovers over.
I found the css preset1.css that controls the color of the selected button, but not the code that says in the initial state, make this button normal.

Can you tell me where to find this?