.wwfb-button{
  position: fixed;
  bottom: 18px;
  z-index: 9999;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  box-shadow: 0 10px 25px rgba(0,0,0,.15);
  background: #25D366;
  color: #fff;
}

.wwfb-right{ right: 18px; }
.wwfb-left{ left: 18px; }

.wwfb-icon{ font-size: 18px; line-height: 1; }
.wwfb-label{ font-size: 14px; }