Revert "Removed main.css, fixed spacing"

This reverts commit a726a029bbc0a63523df81fb63b3fbf9c7b8d459.
Revert "Revert "Removed main.css, fixed spacing""

This reverts commit 7ef3f080e5fe4e9da15a84a814f946b46d35643c.
Fixed main-nav drop down issue