* {
    padding: 0;
    margin: 0;
}

body {
    padding: 50px;
}

.gallery {
    list-style-type: none;
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    justify-content: center;
}

.gallery-item {
    flex: 1 1 calc((100% - 48px) / 3);
    box-sizing: border-box;
}

.gallery-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;     
}