.vierkantje {
    width: 8px;
    height: 8px;
    background-color: black;
    position: absolute;
}

.vierkantje .vierkantje-link {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: white;
    color: black;
    margin-top: -14px;
    /* Adjust this value to move the tooltip up or down */
    margin-left: 8px;
    padding: 2px 4px;
    font-size: 10px;
    white-space: nowrap;
    text-decoration: none;
    z-index: 10;
}

.vierkantje:hover .vierkantje-link {
    display: block;
}

.g-parent {
    position: relative;
}

.connector-svg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}