And then I click through the polycentric sign-up flow, and it breaks after 3 steps, and has very page-like things for which the back button doesn't function, bu

And then I click through the polycentric sign-up flow, and it breaks after 3 steps, and has very page-like things for which the back button doesn't function, but it's okay, they provide their own back button in a non-standard location that disappears if you resize the window.