.tooltipbubble {
	font-size:150%;
}

.tooltipbubble .tooltiptext {
    visibility: hidden;
    width: 290px;
    background-color: #3e3e3e;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px;

    /* Position the tooltip */
    position: absolute;
    z-index: 9;
}

.tooltipbubble:hover .tooltiptext {
    visibility: visible;
}