You will be able to customize or design any shortcode in Hongo by giving your custom class or id to it and providing CSS for that class or id. Please refer below for more details.
To add elements id / class name for particular shortcode or element, go to the shortcode or element. In edit mode > extras (tab). Please see below image for more information.
After adding id or class in shortcode or elements you can go to Customizer > Additional CSS and write CSS code for respected class or id. Please refer below image for more information. You can add custom CSS code in child theme’s style file also.