a.header_logo{background-repeat:no-repeat;-webkit-background-size:100%;background-size:100%;display:block;height:52px;margin:0 auto;position:relative;top:10px;-webkit-transition:opacity .3s;transition:opacity .3s;width:100px;z-index:1002}@media only screen and (min-width:768px){a.header_logo{margin:unset}}