/* Fix #14: visNetwork tooltip readability on dark canvas */
.vis-tooltip {
    color: #333333 !important;
    background-color: #ffffff !important;
    border: 1px solid #cccccc !important;
    border-radius: 4px;
    padding: 8px 12px;
    font-family: Arial, sans-serif;
    font-size: 13px;
    line-height: 1.4;
    max-width: 350px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* Fix #16: Canvas cursor style */
.vis-network canvas {
    cursor: grab;
}
.vis-network canvas:active {
    cursor: grabbing;
}