#tooltip {
    padding: 3px;
    background: #FCEFDC;
    border: 2px solid #ccc;
    text-align: center;
    font-size: smaller;
}

span.tip {
    border-bottom: 2px solid #aaa;
}
a.tip, a.tip:hover, a.tip:visited {
    border-bottom: 2px solid #666;
}