You know those portfolios that show an image of an app or site as it would appear in a desktop (usually Mac OSX)? I like them so I created a mixin to help me achieve that look easily on my site (not that I've implemented them yet...) and I decided to share them with you!

This is my first Sass mixin, so any constructive criticism you have would be appreciated. Should work on all major browsers (tested on Chrome, FF, Edge and IE 11) and be responsive.