a span.tooltip{ 
text-decoration:none;
margin: 10px;
} 
a.tooltip>span.tooltip{ 
 display: none; 
} 
a.tooltip:hover>span.tooltip{ 
 position: absolute; 
 display: block; 
 margin-left: 10px; 
 margin-top: 5px; 
 padding-left: 3px; 
 line-height: 20px; 
 width: auto; 
 height: auto; 
} 
span.tooltip>span.titolo{ 
 margin-left: -3px; 
 display: block; 
 background-color: #404040 !important; 
 color:  #fffff0 !important; 
}