Reply To: Modify css style in child theme

Hello,

I have tested the Custom CSS, it works:

I have taken this element http://prntscr.com/kjocjs

Changed font-size http://prntscr.com/kjocxc

Got this result http://prntscr.com/kjod1j

I see you are trying to set margins to WP Bakery Elements. This way would not work. In order to set margins and paddings, you need to set in the Design options tab of the element https://wpbakery.com/video-academy/use-element-design-options-wpbakery-page-builder-wordpress/

In the rest cases, make sure you take proper selectors.

Best Regards