CSS clearfix

You may, hopefully, know .clearfix.

A really good indepth view about css clearfixing can be read here.

.clearfix:after {
  content: ".";
  display: block;
  height: 0;
  clear: both;
  visibility: hidden;
}
.clearfix { display: inline-block; }
/* Hides from IE-mac \*/
* html .clearfix { height: 1%; }
.clearfix { display: block; }
/* End hide from IE-mac */