How to resize my header logo in mobile device?

As you can see in my form that the Header Logo is getting chopped-off in mobile devices. Is there any solution to this problem or do I've to live with it?

Unfortunately, we cant use custom css with card layouts.

Maybe you can adjust the size of your logo to fit the card layout. Or you can change form layouts to "All Questions in one Page" and change the css to fit to any mobile view.

Hope this information helps.

Please tell me the size in which I should re-size my Logo so that it can fit the card layout.

If you are using the card form, you will need to resize first the image file/logo outside the Form Builder using your image editor. Then you can upload it to the Form Builder and check the fitting.

Example: