body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #f4f4f4;
    color: #333;
}

header {
    background: #333;
    color: #fff;
    padding: 20px;
    text-align: center;
}

.gallery {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    margin: 20px;
}

.gallery img {
    margin: 10px;
    width: 300px;
    height: auto;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
}

footer {
    text-align: center;
    padding: 20px;
    background: #333;
    color: #fff;
}