.wp-subscribe-inline .input-group {
    display: flex;
    flex-wrap: nowrap;
    width: 100%;
    align-items: stretch;
}

.wp-subscribe-inline .wp-subscribe-email-wrap {
    position: relative;
    flex: 1 1 auto;
}

.wp-subscribe-inline .wp-subscribe-email-icon {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 1rem;
    display: flex;
    align-items: center;
    color: var(--secondary, #6c757d);
    pointer-events: none;
    z-index: 3;
}

.wp-subscribe-inline .wp-subscribe-email-wrap #wpEmail {
    height: 100%;
    width: 100%;
    padding-left: 2.75rem;
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.wp-subscribe-inline .input-group-append,
.wp-subscribe-inline .input-group-append .btn {
    display: flex;
    align-items: stretch;
}

.wp-subscribe-inline .input-group-append .btn {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
    margin-left: -1px;
}