* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    overflow: hidden;
}

.gallery {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    height: 100vh;
    max-height: 100vh;
}

.main-photo {
    height: 100%;
    overflow: hidden;
}

.main-photo img, .side-photos img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.side-photos {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}