Last August we covered the phenomenon of this offline-only site from Chris Bolin. It forced you to be offline to view the actual message Chris was trying to share.
For Chris, it was about communicating the general hum of distraction and interruption we all face from constantly being connected. It's something we've become very comfortable with. So much so, that to go offline requires deliberate intention. It's hard to do.
Do you want to be productive? Just go offline, because to maintain a constant connection to the internet is to maintain a constant connection to interruptions, both external and internal.
Well, we totally missed this breakdown of how he built that site (he published that a few months later) and we also didn't notice the offline site is on GitHub so you can view the code and even contribute by translating it to your language.