a.tooltip {
    cursor: pointer;
    color: #0000FF;
    position: relative;
    display: inline;
}
a.tooltip span {
    position: absolute; 
    width: 900px;
    color: #0000FF; font-size:14px; 
    background: #FFFFFF;
    border: 1px solid #0000FF;
    height: default;
    line-height: default;
    text-align: justified;
    visibility: hidden;
    border-radius: 6px;
    padding: 8px
}
a.tooltip span:before {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    margin-left: -12px;
    width: 0; height: 0;
    border-bottom: 0px solid #0000FF;
    border-right: 12px solid transparent;
    border-left: 12px solid transparent;
}
a.tooltip span:after {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    margin-left: -8px;
    width: 0; height: 0;
    border-bottom: 0px solid #FFFFFF;
    border-right: 8px solid transparent;
    border-left: 8px solid transparent;
}
a:hover.tooltip span {
    visibility: visible;
    opacity: 1;
    top: 15px;
    left: 50%;
    margin-left: -76px;
    z-index: 999;
}