#tooltip {
    position: relative;
    cursor: auto;
    padding: 7px;
    font-size: 15px;
    font-weight: bold;
    font-family: Arial, Helvetica, sans-serif;
}
#tooltipText {
    position : absolute;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
    background-color: #000;
    color: #fff;
    white-space: nowrap;
    padding: 10px 15px;
    border-radius: 7px;
    visibility: hidden;
    opacity: 0;
    transition: opacity 1.25s ease;
}
#tooltipText::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 100%;
    transform: translateX(-50%);
    border: 15px solid;
    border-color: #000 #0000 #0000 #0000;
} 
#tooltip:hover #tooltipText {
    top: -25%;
    visibility: visible;
    opacity: 1;
}