Container Flex width help, content padded (with no padding)

Hi everyone, a theme I started from had a container for responsive site design premade called “Container Flex”. The homepage of my site on the tablet and mobile versions is crazy narrow for some reason.

The max width is substantially high, and I’ve tried increasing it with no luck fixing the content’s width. Additionally, there is no padding anywhere I can find that would make the content that narrow.

Any help is appreciated! See a screenshot below and the read-only link for reference.

Here is my site Read-Only: HERE