Remove white space at top and bottom of content in mobile view

At my wits end. I have not been able to figure out how I remove the white space, which apeear to be just outside or inside the content container (below the header and above the footer) in mobile view. My front page is the only exception, but on every other page the white space is there. (Have tried a lot of the advices in the forums, but nothing works.)
I am using theme Book Club.
Thank you SO much in advance. Anita

The page I need help with: [log in to see the link]