jitsi_mod/css/_transcription-subtitles.scss

.transcription-subtitles{
    bottom: 10%;
    font-size: 16px;
    font-weight: 1000;
    opacity: 0.80;
    position: absolute;
    text-shadow: 0px 0px 1px rgba(0,0,0,0.3),
    0px 1px 1px rgba(0,0,0,0.3),
    1px 0px 1px rgba(0,0,0,0.3),
    0px 0px 1px rgba(0,0,0,0.3);
    width: 100%;
    z-index: $zindex2;
}