.scrollToTopBtn {
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  color: white;
  cursor: pointer;
  font-size: 18px;
  line-height: 48px;
  width: 40px;
  height: 40px;
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 50;
  opacity: 0;
  transform: translateY(100px);
  transition: all 0.5s ease;
}

.showBtn {
  z-index: 50;
  opacity: 1;
  transform: translateY(0);
}

.showBtn:hover {
  opacity: 0.9;
}