I've added a working .htaccess and .htpasswd file to a sub-site of my webserver (Apache2.4+php7.4 on a Raspberry Pi 3 B+ using raspios).
This is working totally fine (as you can see in the picture above)...
But I'd like to know if there is a way to change the white background to a html/php file or just redirect another page as background page while the password prompt is still shown?