To whoever manages this page: please rethink the way you're introducing the library. I read the first three paragraphs and still had no idea what was going on. All I learned was that Stylus was involved. Then the next section talks about when and where to use mixins, and the logic for when to use the "native form" vs. the "mixin form" seemed weirdly rigid, so I left.<p>If you want people to use your library, they need to understand it. And if you want them to understand it, you need to be more compelling. Only after going back to make sure I'm critiquing you right did I realize this was part of a bigger toolkit at all.<p>Oh, and please increase the font size.
This might just tempt me ( a non css-y person ) to switch over from bootstrap to this while prototyping or otherwise. It makes things extremely modular which is what makes sense to a programmer like me.
I used this library for an internal project for my employer after seeing it on Hacker News<p>I found it relatively easy to use, but it was a pretty simple thing I was dealing with (one-page registration scheme). Having Coffeescript built in was quite nice, since I find it much easier to deal with.<p>I don't see it as being better than major CMS-style js libraries like Angular JS (which I started playing with recently), but it was pretty easier to learn for the toy application I was building. Being able to deploy to Heroku through the command line is neat, and the auto-reload on changing the HTML was pretty cool too.<p>(I'm not in any way affiliated to the person who wrote it, just someone who used it for a small project.)
I have an hard time with the colors.<p>input-warning(color = yellow)<p>Yellow on yellow on my monitor is pretty much impossible to read.<p>input-success(color = green)<p>is better but I need to concentrate to read the letters<p>simple-button<p>are more similar to tags to me, and the hover effect is not noticeable<p>Take this as constructive criticism, I just had the time to skim over the project.
I wish you the best luck.
Nice stuff, I always wished CSS would have more shorthand codes. Not sure I'll use it, I worry I'll become too dependent on non-official syntax. Hopefully the W3C sees this and borrows some ideas.