Develop-Mode indicator in Panel

Hey,

beside the live page, i have a develop version of a page to play around with new features, without effecting the live page. Because my client also needs to make updates in the Panel in the live AND the develop version i really would like to give my client and myself a clear sign, which version he/she is currently editing.

For example a good indicator could be the black header bar in the Panel which could get red in the develop version.

The good question is, how to achieve this? For example the only difference, which should be used to figure out which version is currently running is the domain:

Live:
www.wonderful-kirby-site.de > Panel with default black header bar

Develop:
develop.wonderful-kirby-site.de > Panel with red header bar

Many Thanks

Matthias

Found a solution by using: Configuration | Kirby CMS (Multi-Environment)
and Examples for customizing the Panel | Kirby CMS