styles.css

body.path-mod-opencast ul.series {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(clamp(225px, 20vw, 300px), 1fr)); /* stylelint-disable-line */
    grid-column-gap: 8px;
    grid-row-gap: 16px;
    padding: 0;
}

body.path-mod-opencast ul.series,
body.path-mod-opencast li.episode {
    list-style: none;
}

body.path-mod-opencast .episode > a {
    color: #333;
    height: 100%;
    display: flex;
    flex-direction: column;
    border: 1px solid #bbb;
    padding: 4px;
}

body.path-mod-opencast .episode > a:hover {
    text-decoration: none;
    background-color: #f2f2f2;
}

body.path-mod-opencast .episode img {
    width: 100%;
    border: 1px solid #ccc;
    aspect-ratio: 16 / 9; /* stylelint-disable-line */ /* not necessary, only improvement for those who support it. */
    object-fit: contain;
}

body.path-mod-opencast .episode .title {
    margin: 6px 2px 4px 2px;
    font-weight: bold;
    line-height: 1.3em;
    max-height: 2.6em;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    text-overflow: ellipsis;
    overflow: hidden;
    -webkit-box-orient: vertical;
}

body.path-mod-opencast .episode .infos {
    margin: auto 2px 2px 2px;
}

body.path-mod-opencast .episode .date {
    color: #666;
    font-size: 0.9em;
    margin-top: auto;
    margin-left: 2px;
}

body.path-mod-opencast .episode .thumbnail {
    position: relative;
}

body.path-mod-opencast .episode .duration {
    float: right;
    position: absolute;
    bottom: 4px;
    right: 4px;
    line-height: 1em;
    padding: 3px;
    background-color: rgba(0, 0, 0, 0.8);
    color: #eee;
    border-radius: 2px;
    font-weight: 600;
    font-size: 0.9em;
}


body.path-mod-opencast .player-wrapper {
    position: relative;
    margin: auto;
    width: 100%;
    height: 85vh;
}

@supports (--custom:property) {
    body.path-mod-opencast .player-wrapper[style*="--aspect-ratio"] {
        height: 0;
        width: min(100%, calc(85vh * (var(--aspect-ratio))));
        padding-top: min(85vh, calc(100% / (var(--aspect-ratio))));
    }
}

body.path-mod-opencast .mod-opencast-paella-player {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}