(Public) Change text colour for several fields

In the public website, change text colour to white for the text in:

- The nav bar

- On the homepage, in the header

- Also make text more visible (user a darker shade) for the Explorează resursele button, in the header on the Homepage.

Start by locating the public website’s navigation bar and homepage header, then inspect the styles for their text and the “Explorează resursele” button. Done when the navigation and header text are white and the button text is darker and easier to read.

Written by the indexing model from the issue text.