thanks for your answer. The URL is http://nordsee-schillig.de, but the site is not online so far. I tried a lot to position the button in the reading box, but then it is not responsive anymore.
I am as well not happy with the space between the text and the button. If you have more text it looks like this
Could I change the margin/padding of the button? If I change the margin, the box doesn’t look good in the responsive layout.