.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.video {
    position: relative;
    overflow: hidden;
    padding-top: 56.25%; /* 16:9 aspect ratio */
}

.video iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}