There isn't a "dummy" file in the Gravity Forms folder. All the files in there are being used by the application. You need to add any new CSS rules to the end of your THEME stylesheet located in the theme folder.. for your current theme, that would be this file.
If you don't understand CSS, then here's a good place to start learning. Basic CSS tutorials are out of scope of the support forum here.
Once you have a grasp on that, you can find out how to properly target the different form elements by looking at the examples located here.
If you get hung up along the way, feel free to yell for help and we will do our best to assist you.
Posted 9 years ago on Saturday November 3, 2012 | Permalink