.youtube {
    position: relative;
    width: 100%;
    max-width: 720px;
    aspect-ratio: 16 / 9;
    cursor: pointer;
    overflow: hidden;
    background: #000;
}

.youtube iframe,
.youtube .yt-wrapper {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

.yt-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 再生ボタン */
.yt-play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(1);
    transition: transform 0.2s ease;
}

.youtube:hover .yt-play {
    transform: translate(-50%, -50%) scale(1.1);
}