example: HTML field (li) – applies to all forms
body .gform_wrapper .gform_body .gform_fields .gfield_html {border: 1px solid red}
example: HTML field (li) – applies just to form ID #1
body #gform_wrapper_1 .gform_body .gform_fields .gfield_html {border: 1px solid red}
example: HTML field (li) – applies just to specific HTML field (based on the unique parent element ID – replace “XX_X” with your actual element ID)
body .gform_wrapper .gform_body .gform_fields #field_XX_X.gfield_html {border: 1px solid red}