Is custom CSS tab not supported in the Card Version of the Configurable List? Tell me that is not true.

Unfortunately, injecting custom CSS code is not yet supported in JotForm Cards. However, you can still inject custom CSS code using the Classic Form Layout.

I will also forward this to our developers as a feature request and we will let you know on this thread if there are any updates.

Let us know if you need further assistance. 

We are currently investigating why our users needs CSS injection on JotForm Cards. As my colleagues has already mentioned, JotForm Cards has no CSS injection feature but if you can tell us which styles and how you want to change with custom CSS, we will try to find a way to meet your requirement. 

Waiting for your valuable return.

As we did not hear from your side, we want to send a second notice you regarding your CSS request. We would be pleased if you can tell us why you need this feature, to change which styles and how?