Material Theme for SmartForms
This will make SmartForms look modern and dynamic. https://material.io/design
Watch for the coming feature to add custom CSS into Style Profiles, releasing later this year for both K2 Five and K2 Cloud. You will be able to link external CSS files into your Style Profile to use in SmartForms, which should unlock this capability. Try it out when it releases and let us know your feedback. Thanks!