- add section.erklaerung CSS class with pink theme styling - add 6 explanation slides to 01-geschichte-grundlagen-html.md - add 10 explanation slides to 02-netzwerke-protokolle-css.md - each slide includes definition, key points, and mnemonics
- rename slide files: YYYY-MM-DD-termin-N-topic.md → NN-topic.md - flatten folders: courses/X/slides/ → slides/X/ - replace "Termin" with "Kapitel" in all content - add klausur extraction script (make klausur) - update Makefile, generate-index.sh, dev-server.sh - add README.md with full documentation