/* Tooltip container */
.tooltipx {
    /*position: relative;*/
    /*display: inline-block;*/
    /*border-bottom: 1px dotted black; !* If you want dots under the hoverable text *!*/
}

/* Tooltip text */
.tooltipx .tooltiptext {
    visibility: hidden;
    /*width: 120px;*/
    bottom: 100%;
    left: 50%;
    margin-left: -60px; /* Use half of the width (120/2 = 60), to center the tooltip */
    background-color: black;
    color: #fff;
    text-align: center;
    padding: 5px 0;
    border-radius: 6px;

    /* Position the tooltip text - see examples below! */
    position: absolute;
    z-index: 1;
}

/* Show the tooltip text when you mouse over the tooltip container */
.tooltipx:hover .tooltiptext {
    visibility: visible;
}