.clearfix { clear: both; }
.clearfix:after { /*Opera*/ clear: both; display: block; content: "."; height: 0; visibility: hidden; }
* html > body .clearfix { width: 100%; display: block; }
* html .clearfix { /* IE 6 */height: 1%; }

.clearfixHelper() { 
	clear: both;
	&:after { /*Opera*/ clear: both; display: block; content: "."; height: 0; visibility: hidden; }
	* html > body & { width: 100%; display: block; }
	* html & { /* IE 6 */height: 1%; }
}

.unselectable {
	.user-select(none);
}

.selectable {
	.user-select(all);
}

input, select, textarea {
	.user-select(text);
}