I suggest the following changes:
1. Add the following block to your theme file:
#form-sclogin-username .input-small, #form-sclogin-password .input-small{
width:150px;}
2. For the ".sourcecoast .btn" style block in sourcecoast.css around line 214, changing the padding to the following should work:
3. I'd recommend creating a theme override, so you don't lose this change when you upgrade SCLogin in the future. See
www.sourcecoast.com/sclogin/documentation/themes for more details.
-Melissa