.stcpay-newsletter-form {
    max-width: 400px;
    margin: 0 auto;
    padding: 20px;
    background: #f6f6f6;
    border-radius: 10px;
}
.stcpay-newsletter-form input[type="email"] {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
}
.stcpay-newsletter-form button {
    background-color: #2DC28D;
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}
.stcpay-newsletter-form .response {
    margin-top: 10px;
    color: #4f008c;
}