.js-tooltip {
    position: fixed;
    background: rgba(0,0,0,0.85);
    color: #fff;
    padding: 6px 10px;
    border-radius: 4px;
    font-size: 12px;
    line-height: 1.4;
    pointer-events: none;
    z-index: 999999;
    white-space: pre-line;
    display: none;
    max-width: 300px;
}