What if controlling your media queries was as easy as adding on to a Sass list? What if I told you it now is?
This snippet comes from a modified version of mixins in the Aura Responsive Framework and came from me hijacking the respond-to mixin namespace but still wanting to use it for custom media queries. It's a little ugly and requires Sass 3.2+ (for now,
(sudo) gem install sass --pre), but it works a charm.
There are two fairly mundane caveats to this method. First, every media query needs to be named. Second, every media query needs a size and assumes min-width and screen. If you want to change min-width, simply add your operator as another option, but if you want to change screen, you need to also include your operator even if you want it to be min-width.
Also, I haven't built in warnings yet for when you do bad things, so bear that in mind.
Without further adue, tada.