body {
    margin: 0;
    padding: 0;
    background: url('https://images.unsplash.com/photo-1507525428034-b723cf961d3e') no-repeat center center fixed;
    background-size: cover;
    font-family: sans-serif;
}

.gallery {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
}

.gallery-img {
    width: 90%;
    max-width: 400px;
    margin: 10px 0;
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}