CSS Gradient Borders

Saw a really cool text input with some rad gradient borders on an concept by @craig-gittins, and decided to make a SASS mixin to make creating this in code super easy. Cheers!

Head over to codepen to see how it works: http://codepen.io/EliFitch/pen/dorXeB

Grab the mixin straight from my github: https://gist.github.com/elifitch/67ae7cfe1594abf8fb57