I had actually added the !important when I tried it previously, but it did not help. I just tried it again pasting your code above into the Extra CSS field. This does not seem to be overriding the style.css for me. I’m OK with updating the style.css if need be, but where would I then increase the font size of the sub-menu items (drop-down list). They now look out of proportion compared to the larger font on the primary menu items.