tooltip text

<style>
.tooltip {
position: relative;
display: inline-block;
border-bottom: 1px dotted black;
font-size:175%;
}

.tooltip .tooltiptext {
visibility: hidden;
width: 120px;
background-color: black;
font-size:75%;
color: #fff;
text-align: center;
border-radius: 6px;
padding: 5px 0;

/* Position the tooltip */
position: absolute;
z-index: 1;
}

.tooltip:hover .tooltiptext {
visibility: visible;
}
</style>

<div class="tooltip">text
<span class="tooltiptext">text</span>
</div>