.bulb_hotspot {
    height: 50px;
    width: 50px;
    background: url(../images/light-bulb-idea-svgrepo-com.png) no-repeat;
}
div.custom-tooltip span {
    visibility: hidden;
    position: absolute;
    border-radius: 3px;
    background-color: #fff;
    color: #000;
    text-align: center;
    max-width: 250px;
    padding: 5px 10px;
    margin-left: -220px;
    cursor: default;
}
div.custom-tooltip:hover span{
    visibility: visible;
}
div.custom-tooltip:hover span:after {
    content: '';
    position: absolute;
    width: 0;
    height: 0;
    border-width: 10px;
    border-style: solid;
    border-color: #fff transparent transparent transparent;
    bottom: -20px;
    left: -10px;
    margin: 0 50%;
}

.arrow_right_hotspot {
    height: 100px;
    width: 100px;
    background: url(../images/arrow-sup-right-svgrepo-com.png) no-repeat;
}

.arrow_delante_hotspot {
    height: 100px;
    width: 75px;
    background: url(../images/arrow-delante.png) no-repeat;
}