Custom Login Page

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Hello! I'm a new developer, and I would like to create a custom login page forhttp://fsacounseling.org. I'm giving them a new theme which can be found athttp://fsascounseling.org/index.php/test... but I want to customize their login to match, and I am stuck. I've been through almost every thread here, and I simply cannot get it my CSS go through.

I've changed the site_theme_paths.php to use my theme, copied the login.php to /single_pages to no avail. I'm about to pull my hair out!

As you can see at the login,http://fsacounseling.org/index.php/login... my own CSS is there, but still being overridden with the default. I'm new to PHP and development, but I can understand most of what's going on I think. Help?!