div#pop-up{display:none;position:absolute;padding:10px;background:#eee;color:#000;border:1px solid #1a1a1a;font-size:90%}.arrow{width:70px;height:16px;overflow:hidden;position:absolute;left:50%;margin-left:-35px;bottom:-16px}.arrow.top{top:-16px;bottom:auto}.arrow.left{left:20%}.arrow:after{content:"";position:absolute;left:20px;top:-20px;width:25px;height:25px;box-shadow:6px 5px 9px -9px black;-webkit-transform:rotate(45deg);-moz-transform:rotate(45deg);-ms-transform:rotate(45deg);-o-transform:rotate(45deg);transform:rotate(45deg)}.arrow.top:after{bottom:-20px;top:auto}