Padding problem H5P plugin Drupal 8

Hi there, 

I'm new to H5P so I apologise in advance if this is a silly question. 

We have installed the H5P module on our Drupal 8 site and I have just started playing with the content types. Whenever a content type is published, there is zero padding between the content and the left border of the page. 

Are there any fixes for this? 

Thank you!