Hi @wwwnews,
Which browser are you using?
I checked multiple devices and the fields are aligned correctly on your site as far as I can tell (not like in the provided screenshot).
On a mobile layout, every field is also in a separate line as you requested.
The hosted fields from the PayPal Card Processing can be fully customized via CSS, but that’s something a theme developer can better help out with. We do have plans to improve the documentation and overall theme compatibility of the hosted fields in a future update. But for the vast majority of themes, the styling looks as intended.
Also, I’d like to mention that we advise against using both PayPal Checkout and PayPal Payments at the same time as this can cause potential compatibility problems. Example: There’s a non-functional “Place order” button displayed above the PayPal smart buttons on your Checkout page which buyers may be inclined to click.
Is there a particular reason why you would want to use the smart buttons from the previous Checkout plugin over the one provided by PayPal Payments?
Thanks!
Kind regards,
Niklas