.tooltip_l {
    position: relative;
}
.tooltip_l .tooltiptext_l {
    visibility: hidden;
    width: 120px;
    background-color: #555;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px 0;
    position: absolute;
    z-index: 1;
    bottom: -150%;
    left: 125%;
    transition: opacity 1s;
}
.tooltip_l:hover .tooltiptext_l {
    visibility: visible;
    opacity: 0.8;
}