Login Screen Customization

Hi all,
I would like to customize my login screen without using a theme.
My goal is to change all my style creating more than the defaults element of the home assistant login for example adding an image or new elements to the page.
Example:
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Is possible to customize the html or create a complete custom page for the login?
If it’s possible how? Is there any documentation about that?
Thanks!

Hello,
Did you ever find a way to achieve this?