More custom CSS examples

I would like to see more custom CSS examples in the manual. I am especially interested in doing the following:

  • hiding the title and subtitle of the calendar when viewing an individual event
  • changing the aspect ratio of the preview images in the calendar view to A4 (1:√2)
  • hiding the search bar in the calendar view

I am not familiar with CSS, so I can not do it myself.

Thank you very much!