Not compatible with dark mode introduced in Django 3.2

[jnns]

As part of the Django 3.2 release, the admin now has a dark theme that is applied based on a prefers-color-scheme media query. Release Notes

The admin now supports theming, and includes a dark theme that is enabled according to browser settings.

This leads to light text on white input field background:

Additionally, the body background color is set to white by django-pagedown which doesn't interfere with the light theme but looks weird on model admins that have a pagedown widget.