How to center the drop down pages on the navigation bar

The drop down pages on my navigation bar have been centered for awhile, but now when I create a new page, the drop down page is centered to the left. I was just want the text to be aligned in the center of the pages that drop down when you hover over the parent pages. Please help!!!

http://www.accordingtodetail.com

For example, the drop down page “dress in detail” under fashion drops down to the left.

Thanks!