.tooltip {
    position: relative;
    display: inline-block;
    border-bottom: 1px dotted black;
}
  
.tooltip .tooltiptext {
    visibility: hidden;
    width: 260px;
    height: 20px;
    background-color: #0071E2;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px 0;
    font-size: smaller;
  
    position: absolute;
    z-index: 1;
    
    margin-top: .5rem;
    top: 100%;
    left: 50%;
    margin-left: -60px;
}
  
.tooltip:hover .tooltiptext {
    visibility: visible;
}