Can i design the same fields while integrating the auth0 plugin to match design

hi, I have used the same plugin for login page on one website and here is the same design I want like this https://prnt.sc/s8mxnj

but I am unable to do the changes and after integrating this looks like https://prnt.sc/s8n0t6

Developer says it is not possible to create the same design with this

could you please let me know if really, it is not possible.

let me know if it possible and how

Thanks

The page I need help with: [log in to see the link]