Free WordPress Plugin to Set Submit Button Padding in WpForms
https://wordpress.org/plugins/styler-...
Take a look at the above free plugin to alter the complete theme and layout of your WpForms. It is dependent on WordPress customizer because of which you get true WYSIWYG . It consists more than 100 options to modify the look without any CSS . You can change paddings, background colors etc from inbuilt options.