h5bp helper classes only

helper-classes.css

.ir { border:0; font: 0/0 a; text-shadow: none; color: transparent; background-color: transparent; }
.hidden { display: none !important; visibility: hidden; }
.visuallyhidden { border: 0; clip: rect(0 0 0 0); height: 1px; margin: -1px; overflow: hidden; padding: 0; position: absolute; width: 1px; }
.visuallyhidden.focusable:active,
.visuallyhidden.focusable:focus { clip: auto; height: auto; margin: 0; overflow: visible; position: static; width: auto; }
.invisible { visibility: hidden; }
.clearfix:before, .clearfix:after { content: ""; display: table; }
.clearfix:after { clear: both; }
.clearfix { *zoom: 1; }
.pull-left { float:left; }
.pull-right { float:right; }