.switch_button {
    min-width: 130px;
    padding: 4px 6px;
    cursor: pointer;
    text-align: center;
    font-size: 14px;
    border: 1px solid #e0e0e0;
    text-decoration: none;
}

.switch_button.active {
    background: #1c84c6;;
    color: #fff;
}
#toolbar{
    padding-bottom:60px;
}
.year {
    font-size: 21px;
    fill: #aaa;
    cursor: default;
}

.ball{
    background: radial-gradient(circle at bottom, #81e8f6, #76deef 10%, #055194 80%, #062745 100%);
}

.ball.bubble {
    background: radial-gradient(circle at 50% 55%, rgba(240, 245, 255, 0.9), rgba(240, 245, 255, 0.9) 40%, rgba(225, 238, 255, 0.8) 60%, rgba(43, 130, 255, 0.4));
 }


.tooltip {
    position: absolute;
    top: 100px;
    left: 100px;
    -moz-border-radius:5px;
    border-radius: 5px;
    border: 1px solid #000;
    background: #fff;
    opacity: .9;
    color: black;
    padding: 10px;
    width: 300px;
    font-size: 12px;
    z-index: 10;
}

.tooltip .title {
    font-size: 13px;
}

.tooltip .name {
    font-weight:bold;
}