html, body { min-height: 100%; height: 100%; padding: 0; margin: 0; }
.fl { float: left; }
.fr { float: right; }
.cl { clear: left; }
.cr { clear: right; }
.cb { clear: both; }

.clrfix:after { content: "."; display: block; clear: both; visibility: hidden; line-height: 0; height: 0; }
.clrfix { display: block; }
html[xmlns] .clrfix { display: block; }
* html .clrfix { height: 1%; }