Studio: Can't get rid of text shadows in drop down menu

Hi,
I'm working on a new site with Studio and have it almost done. But I can't get rid of the shadow on the text inside the dropdown menus in the top nav.
I found the setting for it in the custom styling, but nothing I put in there affects a change.

How can I get rid of it altogether? Can I do it with CSS?
Thanks!

The site, btw is at http://66.147.244.160/~integsb0/

Best,
Laurie