Default Search Component CSS

Hello all,

I've looked through the existing forums, but I'm not able to find an answer to this question.  I apologize if this is a repeat.

I'm tasked with creating a custom header for our Lithium community.  I've had great luck creating the base structure and moving certain components to the new header.  

However, I'm having a very hard time adding the search component.  The main issue is that I'm not sure which CSS needs to be brought over to ensure the search component retains it's default look and feel. Without the CSS, three seperate search boxes display and the turn on suggestions link displays in a seemingly random location.

Is there documentation that shows me the default CSS that's used for each componeent?  Or more specifically, my questions is, what is the CSS required for the search component to retains it's default look and feel?