- Reopening because the iframe HTML has changed with the new skin and requires fiddling *
The form on Special:AdyenGateway is styled with the old green box, and input fields hang off the side after you open the iframe. It should look as spiffy as other gateway forms, and input fields shouldn't do ugly stuff.
We also need to update the CSS for the Adyen-hosted iframe. On the 'skins' page of their merchant console, we download a zip file, customize CSS and HTML includes, zip them back up and upload. It would be nice to add a stylesheet link to the header include pointing to CSS we host on payments. That way, when we deploy changes the outer form and iframe will change at the same time.