Revert "remove app.css changes"

This reverts commit f56fe9d0a937f98193f7a4aa7b078da5d6d9fa2e.
Revert "Revert "remove app.css changes""

This reverts commit e8f23b3bf167618834095395d3316b77cfd315c9.
Revert "Revert "Revert "remove app.css changes"""

This reverts commit 2379affb557f9c4202711e76c6820da1a44454a6.