/* Global styles */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

/* Header styles */
header {
    background-color: #333;
    color: #fff;
    padding: 10px 0;
    text-align: center;
}

header h1 {
    margin: 0;
}

/* Footer styles */
footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 20px;
    position: fixed;
    width: 100%;
    bottom: 0;
}

footer p {
    margin: 0;
}

/* Mobile responsiveness */
@media screen and (max-width: 768px) {
    header, footer {
        padding: 10px;
    }

    .product-list {
        flex-direction: column;
    }
}