#demographics .tooltip{
    visibility: hidden;
    max-width: 350px;
    font-size: 12px;
    background-color: #000;
    color: #fff;
    border-radius: 6px;
    padding: 5px 8px;
    position: absolute;
    z-index: 1;
    opacity: 0;
    transition: opacity 0.5s;
    left: 30px;
    top: 27px;
}

#demographics .chartTitle .tooltip{
    left: 50%;
    transform: translateX(-50%);
    top: 35px;
}

/* triangle arrow part of the tooltip */
#demographics .tooltip::after{
    content: "";
    position: absolute;
    bottom: 100%;
    left: 40px;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: transparent transparent #000 transparent;
    opacity: 0.9;
}

#demographics .chartTitle .tooltip::after{
    left: 50%;
}

#demographics .hoverable:hover .tooltip{
    visibility: visible;
    opacity: 0.9;
}