You navigation li's should contain a href tag to make them buttons. They do not have to link to any part of the page (even though you can implement that) but they should be there. That is the purpose of the nav tag afterall. Take a look at how it is set up in the solution:
You navigation li's should contain a href tag to make them buttons. They do not have to link to any part of the page (even though you can implement that) but they should be there. That is the purpose of the nav tag afterall. Take a look at how it is set up in the solution: