.form-container {
    max-width: 500px;
    margin: 0 auto;
    padding: 20px;
    background-color: #f9f9f9;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.success-message {
    display: none;
    padding: 20px;
    background-color: #dff0d8;
    color: #3c763d;
    border: 1px solid #d6e9c6;
    border-radius: 4px;
}