Confluence Wiki PDF Export and generating a title page

Sometimes you have the requirement to export docs written in Confluence as PDF so customers who don't get access to your wiki can read it.
Often your company has guidelines for publishing documents to the outside (or for customers).
Confluence doesn't generate a title page as default when you do a single page export or a space export as PDF.
This article (sorry, only in german) describes how to achieve this in a few steps.
It only works using the space export to PDF not the single page export.
The author has forgotten to include the CSS styles for the title page so I will publish mine as a starting point.

 .KonzeptTitel {   
 font-size: 36px !important;  
 text-align: center;  
 padding-top: 150px !important;  
 }  
 .KonzeptThema {   
 font-size: 24px !important;  
 text-align: center;  
 padding-top: 100px !important;  
 padding-bottom: 200px !important;  
 }  
 .KonzeptAutor {   
 font-size: 16px !important;  
 text-align: left;  
 }  
 .KonzeptDatum {   
 font-size: 16px !important;  
 text-align: left;  
 }  
 .KonzeptVersion {   
 font-size: 16px !important;  
 text-align: left;  
 }  
 .pdfTitelblattText {   
 font-size: 16px !important;  
 text-align: left;  
 }  

Hope this helps somebody.