remove title/date + author in full width portfolio page

Hello,
I really like the shapely theme, but have one issue: I’m desperatly trying to remove the title, author and date heading at the full width jetpack portfolio pages, but no code I found in the forum works.

This is a picture of a single portfolio page with the heading I want to remove/and a link to the page.
http://breuer-photos.offsite-pr.com/?portfolio=festnetz

Thank you for your help!

– mb

Hey there,
Hope you’re doing well today

Kindly add and save the following code to Appearance > Customize > Additional CSS:

body.single-jetpack-portfolio h2.post-title, body.single-jetpack-portfolio .post-meta{
  display:none!important;
}

Best Regards,
Support

thank you!!
works perfectly