The SCLogin module has a full theme system where you can override or create your own custom theme. For more information on the best way to customize the output, see our theme guide:
www.sourcecoast.com/sclogin/documentation/themes
In general, we don't provide theming and CSS assistance other than for bugs with our module. Every site and template is very different, and we simply can't provide customization assistance to every user to do so. If you know what you're looking to do, the above theme guide should help you implement things easily.
I hope that helps, but should you need anything else, just let us know. If you need to send private information, you can click the mail icon under my picture to the left or use the "Messages" button at the top.
I hope that helps,
Alex