Feature Request: Dark Mode

I'd love to see a "Dark Mode" feature implemented. I find myself browsing this site at night on my phone, and I think having the option to toggle a dark theme would greatly improve the experience for certain scenarios like night time browsing.

Although there are many ways to implement this, I found a straightforward approach via this implementation example - https://flaviocopes.com/dark-mode/.

Looking forward to seeing if anyone else is interested.