.sticky-newsletter-btn {
  position: fixed;
  top: 50%;
  right: 0;
  transform: translateY(-50%);
  z-index: 999;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  padding: 0;
  background-color: transparent;
}

.sticky-newsletter-btn--hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}