/* Add this attribute to the element that needs a tooltip */
[data-tooltip] {
    position: relative;
    z-index: 2;
    cursor: pointer;
}

    /* Hide the tooltip content by default */
    [data-tooltip]:before,
    [data-tooltip]:after {
        visibility: hidden;
        -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=0)";
        filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=0);
        opacity: 0;
        pointer-events: none;
    }

    /* Position tooltip above the element */
    [data-tooltip]:before {
        /*width: 210px;*/
        width: auto;
        position: absolute;
        bottom: 110%;
        left: 50%;
        transform: translateX(-50%);
        margin-bottom: 4px;
        padding: 5px;
        -webkit-border-radius: 3px;
        -moz-border-radius: 3px;
        border-radius: 3px;
        background-color: #000;
        background-color: hsla(0, 0%, 20%, 0.9);
        color: #fff;
        content: attr(data-tooltip);
        text-align: center;
        font-size: 12px;
        font-weight: bold;
        line-height: 1.2;
        white-space: nowrap;
        -webkit-transition: 0.2s;
        -o-transition: 0.2s;
        transition: 0.2s;
    }

    /* Triangle hack to make tooltip look like a speech bubble */
    [data-tooltip]:after {
        position: absolute;
        bottom: 110%;
        left: 50%;
        transform: translateX(-50%);
        width: 0;
        border-top: 5px solid #000;
        border-top: 5px solid hsla(0, 0%, 20%, 0.9);
        border-right: 5px solid transparent;
        border-left: 5px solid transparent;
        content: " ";
        font-size: 0;
        line-height: 0;
        -webkit-transition: 0.2s;
        -o-transition: 0.2s;
        transition: 0.2s;
    }

    /* Show tooltip content on hover */
    [data-tooltip]:hover:before,
    [data-tooltip]:hover:after {
        visibility: visible;
        -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=100)";
        filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=100);
        opacity: 1;
    }

@media (max-width: 767px) {
    [data-tooltip]::before {
        display: none;
        width: auto;
        /* serve per risolvere un bug su mobile, il tooltip troppo largo infatti slarga la pagina */
    }

    [data-tooltip]::after {
        display: none; /* serve per risolvere un bug su mobile, il tooltip troppo largo infatti slarga la pagina */
    }
}