.btn-scroll-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  border-radius: 50%;
  border: transparent;
  background: transparent;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease-in-out, visibility 0.3s ease-in-out;
}

.btn-scroll-top svg {
  width: 40px;
  height: 40px;

  fill: #3d3b3b;

  &:hover {
    transition: all 1s;
    fill: #000;
    font-weight: 600;
  }
}

.btn-scroll-top.show {
  opacity: 1;
  visibility: visible;
}