.wpcf7-response-output {
    font-size: 18px !important;
    padding: 20px !important;
    margin: 20px 0 !important;
    background-color: #f0f8f0 !important;
    border: 2px solid #4CAF50 !important;
    border-radius: 5px !important;
    text-align: center !important;
}