.back-to-main-page {
  position: fixed;
  bottom: 20px;
  right: 25px;
  width: 50px;
  height: 50px;
  background: var(--danger);
  border-radius: 50%;
  font-size: 20pt;
  transition: all .3s;
  opacity: 0.6;
}

.back-to-main-page:hover {
  opacity: 1;
  cursor: pointer;
}