Sign in with a one-time code
An email, then a six-digit code, then signed in: the card resizes between steps, the button turns into its working state and a wrong code says what to do next.
Auth
Sign up with live password rules
Name, email and password with rules that tick as they are met, a reveal button that swaps its eye, and errors that fold away once you type again.
Reset password
Ask for a link, check your email with a resend countdown, choose a new password typed twice, then a confirmation, all in one card that resizes to each step.