Changes were made to codebase so that it follows accessibitly standards.
Header was added to the body and div was replaced by nav (defines navigation links). Class element was removed.https://www.w3schools.com/css/css_selectors.asp#:~:text=CSS%20selectors%20are%20used%20to,a%20specific%20relationship%20between%20them) https://www.w3schools.com/tags/default.asp