jellyfin-web/src/components/upnextdialog/upnextdialog.css

.upNextDialog {
    position: fixed;
    left: 0;
    bottom: 0;
    right: 0;
    padding: 1%;
    display: flex;
    flex-direction: column;
    will-change: transform, opacity;
    transition: opacity 300ms ease-out;
    background-color: rgba(0, 0, 0, 0.7);
    color: #fff;
    user-select: none;
    -webkit-touch-callout: none;
}

.upNextDialog-hidden {
    opacity: 0;
}

.upNextDialog-countdownText {
    font-weight: 500;
}

.upNextDialog-poster {
    max-width: 40%;
    max-height: 15%;
    position: relative;
    margin-right: 1em;
    flex-shrink: 0;
    margin-bottom: 0.5em;
}

.upNextDialog-button {
    background: #404040;
    color: #fff;
}

@media all and (orientation: landscape) {
    .upNextDialog {
        flex-direction: row;
    }

    .upNextDialog-poster {
        max-width: initial;
        max-height: initial;
        width: 10%;
        margin-bottom: 0;
    }
}

@media all and (max-width: 50em) {
    .upNextDialog-overview {
        display: none !important;
    }
}

.upNextDialog-poster-img {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: auto;
    width: 100%;
    box-shadow: 0 0.0725em 0.29em 0 rgba(0, 0, 0, 0.37);
    user-drag: none;
    border: 0;
    user-select: none;
    -moz-user-select: none;
    -webkit-user-drag: none;
    -webkit-user-select: none;
    -ms-user-select: none;
}