.media-box {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9; /* otomatik yükseklik */

    overflow: hidden;
}

.media-box iframe,
.media-box img {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    object-fit: cover;
}