Help regarding Auth0 ACUL

I’m exploring Auth0 ACUL and need clarity on a few things.

I currently have Classic Universal Login with custom HTML/CSS/JS, but Organizations aren’t supported there, so I’m looking at ACUL.

My questions:

  • Can we reuse or adapt Classic UL custom code in ACUL?

  • What are auth0 universal login templates and prompts..how are they inerlinked with acul

  • How much custom HTML/CSS/JS is actually allowed in ACUL?

  • How are Organizations supposed to be handled in ACUL from a UI perspective?

  • Can ACUL be tested locally (localhost)?

  • Does acul support only react?

I have done something while learning and i am getting this page if i try to login with app integrated in auth0.If i click configure screens it is asking me to log in to auth0.com but my tenant is private tenant hosted on auth0app.com.. So i cant login.

Looking for a practical explanation beyond the docs. Thanks!