styles.css

.tooltip-container {
    cursor: pointer;
    position: relative;
    display: inline-block;
    background-color: #FFF;
    padding: 0px
3.5px;
    font-weight: 600;
    border: 1px solid #4B5064;
    border-radius: 50%;
    color: #4B5064;
    line-height: 0;
    font-size: 11px;
    vertical-align: middle;
    top: -1px;
}

.tooltip {
    opacity: 0;
    z-index: 99;
    color: #FFF;
    width: 190px;
    display: block;
    font-size: 14px;
    font-weight: 400;
    line-height: 19px;
    padding: 15px 20px;
    border-radius: 8px;
    text-align: center;
    background: #4B5064;
    -webkit-transition: all .2s ease-in-out;
    -moz-transition: all .2s ease-in-out;
    -o-transition: all .2s ease-in-out;
    -ms-transition: all .2s ease-in-out;
    transition: all .2s ease-in-out;
    -webkit-transform: scale(0);
    -moz-transform: scale(0);
    -o-transform: scale(0);
    -ms-transform: scale(0);
    transform: scale(0);
    position: absolute;
    right: -89px;
    bottom: 25px;
}

.tooltip:before,.tooltip:after {
    content: '';
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-top: 10px solid #4B5064;
    position: absolute;
    bottom: -10px;
    left: 45%;
}

.tooltip-container:hover .tooltip,a:hover .tooltip {
    opacity: 1;
    -webkit-transform: scale(1);
    -moz-transform: scale(1);
    -o-transform: scale(1);
    -ms-transform: scale(1);
    transform: scale(1);
}