gf.css

/* 
Gravity Forms can be hard to override core CSS - the selectors are too specific.  
Use 'form' or even 'body' to get more specific tageting/override.
*/

/* Targeting example 1 - note 'form' selector to make more specific (not used in core GF CSS) */
form div.gform_footer.top_label {
/**/
}

/* Targeting example 2 - note 'body' selector to make more specific (not used in core GF CSS) */
body .gform_wrapper input[type='text'],
body .gform_wrapper input[type='url'],
body .gform_wrapper input[type='email'],
body .gform_wrapper input[type='tel'],
body .gform_wrapper input[type='number'],
body .gform_wrapper input[type='password'],
body .gform_wrapper input[type='file'],
body .gform_wrapper textarea {
  /**/
}