How do I format the Section Collapse tool with custom CSS code?

Can I change the style of the Section Collapse with CSS?

e.g. Font styles

Thanks

I want to make the section smaller, the font to 16pt.

Can I mach the distance between the sections smaller?

@doktorw, 

Just to add to @godporiot's response, you would follow this guide in order to inject the code to your form: https://www.jotform.com/help/117-How-to-Inject-Custom-CSS-Codes 

Please let us know how the code goes, we will be glad to assist you.