Nav bar & other site Links issue - color not showing up correctly

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When I preview my site, the links now show up solid purple on the Nav Bar. I want them to be black, and then turn purple on hover & when we are on the current page.

Another issue I’m having is the “Free Trial” links sometime dissapear, and I have to keep going into them, creating a text span, and turning them white. Anyone have an idea how to fix these issues?