body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

header {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 1em;
}

nav a {
    color: white;
    margin: 0 1em;
    text-decoration: none;
}

nav a:hover {
    text-decoration: underline;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    padding: 20px;
}

.product-card {
    border: 1px solid #ddd;
    padding: 10px;
    text-align: center;
}

.product-card img {
    max-width: 100%;
    height: auto;
}

.product-image {
    max-width: 300px;
    height: auto;
}

.product-detail {
    max-width: 600px;
    margin: 20px auto;
    text-align: center;
}

.price {
    color: green;
    font-size: 1.2em;
    margin: 0.5em 0;
}

.buy-button {
    background-color: #28a745;
    color: white;
    padding: 10px 20px;
    border: none;
    cursor: pointer;
}

.buy-button:hover {
    background-color: #218838;
}

footer {
    text-align: center;
    padding: 1em;
    background-color: #f8f8f8;
}