I am a UI designer, I study to improve my UX knowledge and I have a doubt on a project.
I have a login / registration modal window that works like the Etsy login / registration modal to the payment process. In the first step, it only contains a field for the email address and a "Continue" button.
Then, if the email is already registered, the modal says "Welcome again" and asks the user to enter the password.
If the e-mail is not registered on the site, the modal says "You are new here" and asks the customer to create an account and enter a password.
What do you think of such a solution? Can it be confusing for customers? Is this an unusual model? Thank you for your help!