Wie sagt man so schön: Wer lesen kann, ist klar im Vorteil.
https://www.joomla.org/announc…4-joomla-3-5-is-here.html
ZitatAbility to add a user CSS file to Protostar: currently it is impossible to use a custom.css file when using the Protostar template. This update adds a check to see if the file user.css exists and loads the file to allow for user customisation
Dennoch danke.