How to remove top and bottom paddling from Klaviyo embed form in app section with custom CSS box?

[justin_v-dog]

I've tried everything I can think of here, but the app section, which contains a klaviyo form widget, doesn't seem to be able to be targeted. It's the app section in Shopify, and it automatically gives a top and bottom margin that I can't access. How can I remove it using the custom CSS box in themes? It looks section the .shopify-section during inspection but it's not recognizing the section class.  Any ideas?