Styling a Circular Logo within Thesis Header so it overlays the nav menu

Hi all,

I am looking for advice on styling a circular logo that is within my header. I have the logo styled in a widget that is only added to a specific page within the header (that page has it's own template in the skin editor) . The logo is exactly how I want it except I need it to drop down over the menu instead of under it. I have already tried z-indexing the menu and the logo and that renders the menu useless.

Here is what it looks like:
http://prntscr.com/9ppj44

And here is what I need it to look like:
http://prntscr.com/9ppjcb

Here is my widget code:

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