.wpcf7 form .wpcf7-response-output {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 20px 40px;
    margin: 0;
    z-index: 100;
    background-color: #e0b252;
    border: none;
    color: #fff;
}

.wpcf7 form.sent .wpcf7-response-output{
    background-color: #46b450;
}

.wpcf7-not-valid-tip{
    font-size: .8em;
}