body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background-color: #f0f2f5;
}

.container {
    width: 80%;
    margin: 50px auto;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.2);
    text-align: center;
}

h2 {
    color: #333;
}

.form-section {
    margin-bottom: 40px;
}

form input[type="text"],
form input[type="number"] {
    width: 80%;
    padding: 8px;
    margin: 5px 0;
    border: 1px solid #ccc;
    border-radius: 5px;
}

form input[type="submit"] {
    background-color: #4CAF50;
    color: white;
    padding: 8px 15px;
    margin: 5px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

form input[type="submit"]:hover {
    background-color: #45a049;
}

.product-list {
    margin-top: 30px;
}

.product-item {
    border-bottom: 1px solid #ccc;
    padding: 15px 0;
}

.success {
    color: green;
}

.error {
    color: red;
}

.back-button {
    margin-top: 30px;
}

.back-button a {
    display: inline-block;
    padding: 12px 20px;
    background-color: #2196F3;
    color: white;
    text-decoration: none;
    font-size: 18px;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.back-button a:hover {
    background-color: #1976D2;
}