/* Tooltip container */
.tooltip {
    position: relative;
    display: inline-block;
    margin-left: 0.5em;
    width: 16px;
    height: 16px;
}

/* Tooltip text */
    .tooltip + .tooltiptext {
        visibility: hidden;
        display: block;
        position: absolute;
        width: auto;
        background-color: lightgray;
        color: black;
        text-align: center;
        padding: 5px 5px;
        border-radius: 6px;
        font-weight: normal;
        z-index: 1;
        box-sizing: border-box;
        left: 0;
        right: 0;
        min-height: 2.2em;
    }

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