body {
    font-family: Arial, sans-serif;
    margin: 0;
    background: #111;
    color: white;
}
header {
    text-align: center;
    padding: 1rem;
    background: gold;
    color: black;
}
.product {
    border: 1px solid #444;
    margin: 1rem;
    padding: 1rem;
    background: #222;
}
.product img {
    max-width: 100%;
}