Very impressive theme, Matthias!

I really can't believe the amount of work you've put into the theme, specially all the schema.org markup, over and above the responsive features. It really is true - code is poetry :-) I must just compliment you on creating a truly responsive theme. So many developers seems to think responsive means something happens when you press a button ;-)

I'm putting a few finishing touches to a copy on XAMPP before implementing.

There is one simple thing I cannot resolve: excerpts on the home, archive, author and search pages. I have medium skill, but am lost when I can't find conventional php code easily identified in other themes. If this is not the correct place to ask for guidance, please point me in the right direction.