.sender {
    padding: 50px 0 10px;
    text-align: center;
}

.sender .h4.caption {
    margin: 0 auto;
}

.sender .form-message-result {
    padding: 0;
}

.sender input[type="submit"] {
    padding: 12px 25px 11px;
}

@media screen and (min-width: 1200px) {
    .sender .h4.caption {
        width: 800px;
    }
}

@media screen and (max-width: 769px) {
    .sender .h4.caption {
        width: 100%;
        font-size: 14px;
    }
    
    .sender .h4.caption span {
        margin: 5px 0 0;
        font-size: 14px;
        text-transform: none;
        font-weight: normal;
        display: block;   
    }
    
    .sender .form-message-result {
        margin: 5px 0;
    }
    
    .sender input[type="submit"] {
        margin: 15px 0 0;
    }
}