#content_main{float: right;position: relative;width: 44em;max-width: 65%;margin-top: 11.5em;margin-right: 0.5em;margin-bottom: 5em;}
#sidenav{float: left;position: relative;width: 25em;max-width: 35%;margin-top: 11.5em;margin-left: 0.5em;margin-bottom: 5em;}