body {
    background-color: #e6e7e9;
}

rect {
    pointer-events: all;
    fill-opacity: 0;
    stroke-opacity: 0;
    z-index: 1;
}

.tooltip {
    position: absolute;
    background-color: rgba(0, 0, 0, 0.8);
    padding: 12px;
    color: white;
    border: 1px solid white;
    border-radius: 4px;
    pointer-events: none;
    opacity: 0;
    font-family: sans-serif;
    font-size: 14px;
    line-height: 1.4;
}