Add em support to max and min-width variables

[anthonyjfio]

In short what I would like is to set this in the variables

$min-width           = 25em
$max-width          = 50em

and get this in the css file

@media all and (min-width: 25em) {
  . . .
}

I think this could be a great addition, but I'm not sure if it's possible.

Here's the reason why I like to use them http://blog.cloudfour.com/the-ems-have-it-proportional-media-queries-ftw/

[corysimmons]

Sorry it's taken me so long to respond. I have my ups and downs with being a good maintainer.

I'm planning on migrating this project to PostCSS in the next month or so, and when I do, I'll probably rewrite it from scratch.

---

Why do you want to get @media all and (min-width: 25em) in particular? You already get @media (min-width: 25em). I don't understand the value of all?

https://github.com/corysimmons/typographic/blob/master/stylus/typographic.styl#L124

[corysimmons]

I'm also not sure we'll be able to do it, at least not with a lot of extra work. Maybe we can reserve this for a future version of Typographic.