.backToTop {
  cursor: pointer;
  transition: 0.5s;
  width: calc(92px/2);
  margin: 0 auto;
  vertical-align: middle;
}

.backToTop:hover {
  opacity: 0.6;
}

@media screen and (min-width: 900px){
  .backToTop {
    width: auto;
  }
}