twenty twelve menu broke

HI,
I have been working with my child theme no problem. I just now changed a font color in the style sheet and the horizontal drop down menu suddenly won’t style with the css. I tried taking out the child menu css to see if it would revert back to the original and it still wasn’t styled. I am lost as to what I did to suddenly break the style in the website.

Please take a look. Any help would be great.
https://dentaldesignofarcadia.com/wpdev/