.tpgb-mailchimp.form-style-1 .plus-newsletter-input-wrapper span.prefix-icon {
    position: absolute;
    top: 50%;
    transform: translate3d(0,-50%,0);
    padding-left: 15px;
    margin-top: 0;
    left: 0
}

.tpgb-mailchimp.form-style-1 button.subscribe-btn-submit {
    position: absolute;
    top: 50%;
    right: 5px;
    transform: translate3d(0,-50%,0)
}