Hi, I'm designing an alternate layout template for my 404 page based on the recommendations provided under item 1 of this article: https://www.shopify.com/partners/blog/best-404-pages I believe I've followed the instructions exactly; however, it does...

I'm using the Dawn theme template. I'd like to adjust the text width on the collection banner of the default collection page such that it covers the area shown by the red outline in the image below. Any guidance would be appreciated.