The sign-in screens are the shipped signin partial, shown in its states. The last two are examples to copy.
Each example is live, but its links go nowhere.
signinsignin-titlelive-head
Signing in
Show one main way in, with the others underneath. Do not split sign-up from sign-in: one button that works for both is less to explain and less to get wrong.
Asking for an address
One field and one button. Nothing to remember and nothing to steal. Rastrillo does this out of the box.
The fastest way in for someone who has one, and nothing to type. Offer a second way as well: people lose devices, and a passkey that will not work is a locked door.
If you do use passwords, use the same one-way-in layout, and put a way to reset directly under the button rather than hiding it.
We do not recommend passwords
Rastrillo does not ship this screen. People reuse passwords, they leak, and you inherit the job of storing them safely. Use a link in your email plus a passkey, or passkeys on their own. The markup is here because some products still need it.