I don't think this merits its own thread, and here seems like a good place
The Sandbox - by which I mean all three of them - doesn't respond to the user being on mobile. If I'm on mobile, I just get the normal site, scaled down horizontally to fit on my screen, with text either hugely increased in size or barely big enough to read depending on who-knows-what.
Normally this wouldn't matter, except my doomsday contest team had a draft for our hub page sitting around that required a more responsive layout. Link is here http://www.scp-wiki.net/end-of-death-hub
Resize your browser window and you see what I mean. It has different layouts for mobile and for desktop, based on detecting the screen size.
I had to spend a fair bit of time correcting the mobile layout of that hub after it was posted because of the differences between the main site and the sandbox. It would've been a lot easier to test that page on the sandbox had the scaling been consistent between the two sites.
I think it's because the <head> for the sandbox is missing the following line:
<meta name="viewport" content="width=device-width, initial-scale=1.0">
Hopefully adding that line will fix the issue. I have no clue how easy that is to do, though - I have my own wikidot site just for testing this sort of thing and I couldn't work out how to do it. It might even be that you have to have a premium account to do it?
I actually brought this up in #site11 a week or two (or three/four?) ago, but as the issue still stands so I'm bringing up again in a more permanent place :P
I appreciate that this is a fairly niche problem that doesn't matter for 99% of this site's content, but it is still a problem
EDIT: I believe this issue can be fixed if a Sandbox admin goes +Options -> Edit Meta -> Add a new meta tag -> Fills in the meta tag details -> Apply to all pages.