Problems with page width / padding effecting content upon window resize ( Sense 8.0.0 )

Hi, I was hoping someone could help me with an issue I am struggling to find the solution to.

I am using Sense 8.0.0 theme and have used this code:

@media screen and (min-width: 990px){
.page-width {
padding: 0 30rem;
}
}

This has placed my content into the perfect position that I am happy with for full screen on my monitor. Shown in 2 images here:

However, when resizing the window to smaller sizes, all of the content is squashed together due to the padding, shown in the 2 images below:

I would like the content to stay the same size as in the full screen version and only reduce in size once they are forced too (edges of window reach them). I hope that makes sense.

The mobile version is fine.

Please could someone help me find the solution to this?

Thank you for any help!

Also, the header messes up and my logo shrinks and disappears ;(