I am using "aardvark" theme for Moodle 2.3. Except myself, right now I don't want anybody to login. How can I hide login information in the header of the FrontPage? I tried core.css, but it didn't work.
I also found the background color for Menu like "Main Menu" and "Calendar" is too grey, and want to change it to dark blue, but customizing "Administration: Appearance: Themes: Aardvark" only changed the color in the header.
Any ideas what I should do?