.scroll-to-top {
  position: fixed;
  bottom: 80px;
  right: 0;
  background-color: #c6c7c8;
  width: 40px;
  height: 40px;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 50%;
  margin: 10px;
  box-shadow: 0 0 15px #c6c7c8;
  cursor: pointer;
  visibility: hidden;
  z-index: 100;
}
.scroll-to-top:hover {
  background-color: #f5df4e;
}
.scroll-to-top i {
  font-size: 19px;
  font-weight: 600;
  color: #fff;
}
.scroll-to-top:hover i {
  color: #000;
}