<style>
    .tooltip {
        position: relative;
        display: inline-block;
        border-bottom: 1px dotted black;
    }

    .tooltip .tooltiptext {
        visibility: hidden;
        width: 120px;
        background-color: black;
        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>