I made a CSS framework for Front-End developers. This framework is compressed but don't use it if you want to own a well optimized website.
You can call margins and paddings right, left, top and bottom with some short code. It's working from -1000 to 1000. When you wanted to use minus parameter you have to write "mlm20" class for make margin-left: -20px. If you want to make margin-left: 20px, than enough if you call "ml20" class.
<div class="ml20"></div>margin-right code: mr
margin-right minus code: mrm
margin-left code: ml
margin-left minus code: mlm
margin-bottom code: mb
margin-bottom minus code: mbm
margin-top code: mt
margin-top minus code: mtm
padding-right code: pr
padding-right minus code: prm
padding-left code: pl
padding-left minus code: plm
padding-bottom code: pb
padding-bottom minus code: pbm
padding-top code: pt
padding-top minus code: ptm