Sometimes it's the smallest things that can make a world of difference.
Customizing your Everwebinar / Webinarjam registration button is one of those things. In the video below I show you how to modify your custom CSS and make the registration button look however you like.
Here is the script you should use - just copy and paste this as per the above instructions.
border: 2px solid #ffffff;
If you need assistance, don't hesitate to contact me via my contact page above.