.btn-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--dark-color);
  color: var(--white-color);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;

  opacity: 0;
  visibility: hidden;
  transform: translateY(30px); 
  transition: all 0.3s ease;
  z-index: 1000;
}

.btn-top svg {
  fill: var(--white-color);
  transform: rotate(90deg);
  width: 50%;
  height: 50%;
}

.btn-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0); 
}

.btn-top:hover {
  background-color: var(--darklight-color);
}