/* YouTube-Vorschaubilder mit Link auf youtube.com (siehe youtube.php) */
.yt-link {
    position: relative;
    display: block;
    width: 100%;
    max-width: 560px;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: #000;
}
.yt-link img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: .75;
    transition: opacity .2s;
}
.yt-link:hover img,
.yt-link:focus img {
    opacity: .9;
}
.yt-play {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 68px;
    height: 48px;
    margin: -34px 0 0 -34px;
    border-radius: 12px;
    background: rgba(0, 0, 0, .7);
}
.yt-play::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    margin: -10px 0 0 -7px;
    border-style: solid;
    border-width: 10px 0 10px 18px;
    border-color: transparent transparent transparent #fff;
}
.yt-note {
    position: absolute;
    right: 0;
    bottom: 0;
    padding: 4px 10px;
    font-family: Lato, sans-serif;
    font-size: .8rem;
    color: #fff;
    background: rgba(0, 0, 0, .65);
}