Page/Post supporting shortcodes

I am trying to setup foyer to support displaying calendars. These calendars are built using EventOn (https://www.myeventon.com/)

I am trying to either build a page (preferably) that has their shortcode to display the calendar and then have the page built. I am not worried about headers and such because I can create pages without headers/sidebars.

When I do that and look at the page in a browser, I get a big grey background and inside of it, I get a box with vertical and horizontal scroll bars and nothing in it.

I then tried to build the page as a post. This got better. But it is still wonky. This had the post title and date in that big white box and has a vertical scroll bar on the right side ??

I then tried to build the slide as an external website. I called the page. The page looks fine in a browser hitting it. However, when I called the foyer version of the page it did something interesting. It rendered the page again with that massive grey background, the white box in the center of the screen and it rendered the page as it was on a mobile device.

How do I get the external website version to not look like it is a mobile device?

View post on imgur.com

Shows what I mean about the grey and the white box in the center.

I have looked at the page pulled from WP. It shows the content block being full width.

Any ideas?

Thanks.

dave