While browsing websites, I noticed an interesting design element that occurs when you zoom out in your browser. The header, navigation, content area, and footer all expand along with the layout. It seems like many popular websites, such as PC World, Microsoft, and Facebook, follow this model. Here are some examples:
Zoom 100%: https://i.sstatic.net/NyQfI.png
Then, at Zoom 50%, notice how the header and navigation also expands:
https://i.sstatic.net/g0QDR.png
Contrastingly, there are boxed layouts commonly seen in tutorials:
https://i.sstatic.net/iJ7xU.png
I am curious about how to achieve this effect using CSS. Any examples or tips, especially similar to the design of TechCrunch's website, would be greatly appreciated.