jellyfin-web/dashboard-ui/css/mediaplayer.css

/* Now playing bar */
.nowPlayingBar {
    padding: 6px 0 14px 0;
    border-top: 2px solid green;
}

.nowPlayingBarImage {
    vertical-align: bottom;
}

.mediaButton {
    vertical-align: top;
}

#mediaElement {
    display: inline-block;
    position: relative;
}

.nowPlayingText {
    display: inline-block;
    font-weight: normal;
    position: relative;
    top: -7px;
    margin-left: 3px;
    max-width: 200px;
    overflow: hidden;
    margin-right: 2em;
    white-space: nowrap;
}

.nowPlayingDoubleText {
    top: -3px;
}

.nowPlayingImage {
    display: inline-block;
}

    .nowPlayingImage img {
        height: 40px;
        margin-right: .5em;
        vertical-align: bottom;
    }

.mediaButton img {
    height: 24px;
}

.currentTime {
    display: inline-block;
    position: relative;
    top: -10px;
    max-width: 110px;
    margin-right: 2em;
    font-weight: normal;
}

.nowPlayingBar .currentTime {
    top: -15px;
}

.mediaSlider {
    position: relative;
    top: -10px;
    width: 50px;
    cursor: pointer;
}

.sliderContainer {
    display: inline-block;
}

.positionSliderContainer {
    width: 130px;
}

#nowPlayingBar .sliderContainer {
    margin-top: 14px;
}

.volumeSliderContainer {
    width: 90px;
}

.sliderContainer .ui-slider {
    margin: 0 !important;
}

.sliderContainer .ui-slider-track {
    margin-left: 15px !important;
}

.volumeSliderContainer .ui-slider-track {
    margin-left: 5px !important;
}

.volumeButton {
    margin-right: .5em!important;
}

::-ms-thumb {
    background-image: linear-gradient(#fefefe,#dddddd);
    width: 15px;
}

::-ms-track {
    padding: 0;
    border: 0;
    color: #777;
}

input[type="range"]::-ms-fill-lower {
    background-color: #777;
}

input[type="range"]::-ms-fill-upper {
    background-color: #777;
}

::-ms-tooltip {
    display: none; /* display and visibility only */
}

@media all and (max-width: 800px) {

    #nowPlayingBar .mediaButton {
        margin-top: 0;
        margin-bottom: 0;
    }

        #nowPlayingBar .mediaButton:not(#playButton):not(#pauseButton) {
            display: none;
        }

    #nowPlayingBar #playButton, #nowPlayingBar #pauseButton {
        float: right;
    }

    #nowPlayingBar .currentTime, #nowPlayingBar .positionSliderContainer, #nowPlayingBar .volumeSliderContainer, #nowPlayingBar .muteButton, #nowPlayingBar .unmuteButton {
        display: none !important;
    }

    .nowPlayingBar {
        padding: 10px 5px 10px 0;
    }
}

@media (min-width: 1440px) {
    #nowPlayingBar .positionSliderContainer {
        width: 300px;
    }
}

.mediaPlayerAudioContainer {
    position: fixed;
    top: 40%;
    text-align: center;
    left: 0;
    right: 0;
}

.mediaPlayerAudioContainerInner {
    padding: 1em;
    background: #222;
}