a.tooltip span {display: none;}
a.tooltip:hover {position: relative;}
a.tooltip:hover span {display: block; position: absolute; background-color: #7ab2e6; border: 3px solid #123759; color:white; font-weight: bold; padding: 2px; width: 150px; height: 35px;}
a.tooltip:hover span {bottom: 30px; left:10px;}