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

.container {
    width: 80%;
    margin: 0 auto;
    padding: 20px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    color: #333;
}

#product-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.product {
    border: 1px solid #ddd;
    padding: 10px;
    width: calc(33.333% - 20px);
    box-sizing: border-box;
    text-align: center;
    background-color: #f9f9f9;
}

#cart {
    margin-top: 20px;
    padding: 20px;
    background-color: #f9f9f9;
    border: 1px solid #ddd;
}

#cart-items {
    list-style-type: none;
    padding: 0;
}

#cart-items li {
    padding: 10px;
    border-bottom: 1px solid #ddd;
}

button {
    display: block;
    width: 100%;
    padding: 10px;
    background-color: #28a745;
    color: white;
    border: none;
    cursor: pointer;
}

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