stoping text block width to rescale

Site URL: https://www.ccctv.org/

I want text blocks to have same width despite the window size (unless the window page is shorter than the text block width). How can i stop it from resizing or rescaling? 
 

For the page you show set the width of the section to L (large).

The following CSS is not a solution but more of an experiment.

.page-section.content-width--wide .content {

  width : calc( 800px - ( 3vw * 2 ) );
  
  }

@media screen and ( max-width : 800px) {

  .page-section.content-width--wide .content {
  
    width : unset;
    
    }
  
  }

You can add this to Page Settings > Advanced > Page Header Code Injection for the page. Please see per-page code injection.

Or, you could throw it into a code block wrapped with <style> and </style>.

You can of course change the 800px values.

Let us know how it goes.