.tooltip {
    position: relative;
}
  
.tooltip:before {
    content: "";
    position: absolute;
    border-style: solid;
    border-width: 8px 8px 0 8px;
    border-color: #FFF transparent transparent transparent;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
}
  
.tooltip:after {
    content: attr(title);
    position: absolute;
    background-color: #FFF;
    color: #000;
    padding: 5px;
    border-radius: 5px;
    font-size: 12px;
    font-weight: normal;
    top: -40px;
    left: 50%;
    transform: translateX(-50%);
    white-space: nowrap;
}
  
.tooltip:hover:after {
    visibility: visible;
    opacity: 1;
}
  
.tooltip:after {
    visibility: visible;
    opacity: 1;
}