.grid-container{max-width:1100px;margin:0 auto}
.grid-parent:after{content:"";display:block;clear:both}
.grid-75{width:72%;float:left}
.grid-25{width:26%;float:right}
.grid-33{width:33.33%;float:left}
.grid-100{width:100%}
@media(max-width:800px){.grid-75,.grid-25,.grid-33{width:100%;float:none}}