Width of pages help

Hello! This is in regards to my website: www.terradigitalmedia.com
As you can see on Blog and in Client pages, the width of the text is only half the page. It started doing this and i have no idea why. Can anyone help? thanks

Hello there,

To enlarge it, add this CSS code to Appearance > Customize > Additional CSS from dashboard.

    @media only screen and (min-width:992px) {
      .archive #primary.col-md-8 {
        width: 100%;