#chartjs-tooltip {
    position: absolute;
    max-width: 400px;
    max-height: 200px;
    overflow-y: auto;
    overflow-x: hidden;
    white-space: pre-wrap;
    word-break: break-word;
    background: rgba(0, 0, 0, 0.85);
    color: #fff;
    padding: 10px;
    border-radius: 6px;
    font-size: 13px;
    line-height: 1.4;
    pointer-events: auto;
    z-index: 9999;
}