.bubbles {
    stroke-width: 2px;
    stroke: white;
}

.bubbles:hover {
    stroke: black;
}

div.tooltip {
    position: absolute;
    text-align: center;
    width: 100px;
    height: 80px;
    padding: 2px;
    font: 12px sans-serif;
    background: lightsteelblue;
    border: 0px;
    border-radius: 8px;
    pointer-events: none;
}

.font-size-lg {
    font-size: 1.3em;
}

ul {
    list-style-type: none;
}

.mt-10 {
    margin-top: 10px;
}

.mt-30 {
    margin-top: 30px;
}

.mt-50 {
    margin-top: 50px;
}