I like the new form style, but they're not customizable?

I like the new single-question-page forms, but as far as I can tell customization is extremely limited. For example, I just need a clean blue on white on white design, without borders or drop shadows and it doesn't appear that there is any way to style the form that way.

Embedding also seems to always force it into a square which doesn't look so good in the way I'm trying to embed it. Historically I could fix this with CSS, but it seems that's not an option either.

Am I missing something? There must be more to customization than I'm seeing here.

Yes, the new layout doesn't have any CSS customization. What you see in the form is the only option you can add design to your Card form.

What you see under "Custom" tab are the options that can only be changed.

Let us know if you have any questions or if you need further assistance. 

So, no meaningful customization? Are there plans to add more options here?

Card layout is fairly new. I believe our team have plans to add more customization option to it, however, as of the moment, we have no plans on adding CSS in the new card layout. You can always go back to the old layout if you need to design and use CSS to customize the layout.

Let us know if you have any questions or if you need further assistance.