@media only screen and (min-width:48em){#content-header{margin:0 40px}}@media only screen and (min-width:60em){#background{background:url(/images/img/classroom-blurred.jpg) no-repeat;background-size:cover;height:100%;position:fixed;width:100%;z-index:1}#foreground{position:relative;z-index:2;top:0;border-top:1px solid #FFF}#content-header{margin:0 0 10px;padding:0;border-bottom:1px solid #dedede}}#content{padding:10px}@media only screen and (min-width:60em){#content{background:#FFF;border-radius:10px;margin:20px auto;padding:20px;max-width:960px}#content:after,#content:before{content:" ";display:table}#content:after{clear:both}}@media only screen and (min-width:48em){#content-main{padding:0 40px}#sidebar{margin:8px 40px 0}}@media only screen and (min-width:60em){#content-main{float:left;padding:0;width:75%;width:calc(100% - 320px)}#sidebar{margin:0;width:300px;float:right}}