Typhoon set width

The default Typhoon width is too wide for my taste and despite several attempts to control this via the wrapper class in the the configuration I'm getting nowhere. I see this link from 4 years ago but following the suggested link isn't leading me to a solution. The defaults are

xl:container xl:mx-auto md:px-6 px-4

which gives a width of around 80% of my screen (1920x1080). I tried changing the xl to lg or md as per the Tailwind docs, but every change results in the full width being used which suggests to me that my syntax is wrong. I clearly don't understand what or how to change the default so that on a monitor I'm using only 50% of the screen width for example. Does anyone have any pointers?

The link you are referring to, it the link to the issues page of all Premium products. Owners of any Premium product are entitled to get free premium support by the developers of the products themselves.

From the issues page:

If you have a purchased a Grav Premium product and have an issue or question, please use the issue tracker here.

Thanks, the links are marginally different, enough for me at least to not get to the correct page. I will resubmit.