I am trying to use media queries for a GMail email signature.
The media queries seem to simply not work at all, even when this simple example is copy pasted as is: https://developers.google.com/gmail/design/css#example_2
Litmus is being used to test this, and whether it's desktop or mobile; Android or iOS; the media queries simply have no effect.
I followed the guidelines in the answers here, but no luck.
Is it even possible to use media queries for GMail signatures?
PS: I am setting the signature programmatically using the following: