How do I log into Utopian.io with an existing Steemit account?

Every time I go to Utopian.io, I get redirected to join.utopian.io which looks like this

I don't see a sign-in option. All I see is a Sign up.

If I click on Sign Up, I see this modal window opening

It's asking me to create a Steemit account. But I already have one! I just want to log in.

Clicking on Create a Steem Account button takes me to this page that is no help at all

What should I do? Is there a button I missed? How do I log into utopian with my existing Steem account?