Custom Checkout's input fields can be customized to fit your payment form on your web site. Here are a few examples of how easily the UI can be styled, complete with HTML, CSS, and JavaScript.
You can use using the test card number 4030 0000 1000 1234, with a security code 123 and any expiry date in the future.
Note: We also have a demo of Custom Checkout’s eventing and a demo of a complete payment flow Custom Checkout.