jitsi-meet/css/_jitsi_popover.scss

.jitsipopover {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1010;
    display: none;
    max-width: 300px;
    min-width: 100px;
    padding: 1px;
    text-align: left;
    color: #333333;
    background-color: #ffffff;
    background-clip: padding-box;
    border: 1px solid #cccccc;
    border: 1px solid rgba(0, 0, 0, 0.2);
    border-radius: 6px;
    /*-webkit-box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);*/
    /*box-shadow: 0 5px 10px rgba(0, 0, 0, 0.4);*/
    white-space: normal;
    margin-top: -10px;
    margin-bottom: 35px;
}

.jitsipopover.black
{
    background-color: rgba(0,0,0,0.8);
    color: #ffffff;
}

.jitsipopover-content {
    padding: 9px 14px;
    font-size: 10pt;
    white-space:pre-wrap;
    text-align: center;
}

.jitsipopover > .arrow,
.jitsipopover > .arrow:after {
    position: absolute;
    display: block;
    width: 0;
    height: 0;
    border-color: transparent;
    border-style: solid;
}

.jitsipopover > .arrow {
    border-width: 11px;
    left: 50%;
    margin-left: -11px;
    border-bottom-width: 0;
    border-top-color: #999999;
    border-top-color: rgba(0, 0, 0, 0.25);
    bottom: -11px;
}
.jitsipopover > .arrow:after {
    border-width: 10px;
    content: " ";
    bottom: 1px;
    margin-left: -10px;
    border-bottom-width: 0;
    border-top-color: #ffffff;
}

.jitsipopover.black > .arrow:after
{
    border-top-color: rgba(0, 0, 0, 0.8);
}

.jitsiPopupmenuPadding {
    height: 35px;
    width: 100px;
    position: absolute;
    bottom: -35px;
}

.jitsipopover_green
{
    color: #4abd04;
}

.jitsipopover_orange
{
    color: #ffa800;
}

.jitsipopover_blue
{
    color: #21B9FC;
}

.jitsipopover_showmore
{
    background-color: #21B9FC;
    color: #ffffff;
    cursor: pointer;
    border-radius: 3px;
    text-align: center;
    width: 90px;
    height: 16px;
    padding-top: 4px;
    padding-left: 10px;
    padding-right: 10px;
    margin: 15px auto 0px auto;
}