#newsletter-form {
            max-width: 400px;
            margin: 0 auto;
            padding: 20px;
            background: #f5f5f5;
            border-radius: 8px;
        }
        #message {
            margin-top: 15px;
            padding: 10px;
            border-radius: 4px;
            display: none;
        }
        .success {
            background-color: #d4edda;
            color: #155724;
        }
        .error {
            background-color: #f8d7da;
            color: #721c24;
        }