*,:after,:before{-webkit-box-sizing:border-box;box-sizing:border-box}

[class^=grid-col-]{padding:0}

.grid-col-1of2,.grid-col-1of3,.grid-col-1of4,.grid-col-2of3,.grid-col-3of4, .grid-main{width:100%}

.grid-row:after{content:"";display:block;clear:both}

.centered {margin:auto}

@media (min-width:48.75em){
	.grid-main{width:50%}
	.grid-col-1of4{width:50%}
}
@media (min-width:73em){
	.grid-main{width:50%}
	.grid-col-1of2{width:50%}
	.grid-col-1of4{width:25%}
	.grid-col-3of4{width:75%}
	.grid-col-1of3{width:33.333%}
	.grid-col-2of3{width:66.666%}
}