This is really two questions.
Is there a way (using the widget) to make a form only for login, and another form only for signup? So that one could put a login-only form on a /login page, and a signup-only form on a /signup page?
If so, can these forms be embedded in my webpage? So that at mysite.com/login, one would see my custom navbar, and whatever content I put on the page, and also the Auth0 form there, embedded in that page, wherever I put it, allowing the user to log in but NOT to sign up?