.crm-profile-name-Newsletter_Signup .crm-container .crm-button, .crm-profile-name-Newsletter_Signup .crm-container .crm-button:hover
 {
    background: #198754;
    font-size: 25px;
    padding: 10px 20px;
}
.crm-profile-name-Newsletter_Signup button#_qf_Edit_next {
    margin-left: 220px;
}