.scroll-to-top{
  position: fixed;
  bottom: 15px;
  right: 15px;
  z-index: 999;
  display: none;
}
.scroll-to-top a {
  background-color: rgba(19, 113, 234, 0.67);
  color: #fff;
  padding: 10px;
  border-radius: 35px 35px 0px 0px;
}
.scroll-to-top a:hover {
  color: #151414;
  background-color: rgba(19, 113, 234, 0.57);
  transition: cubic-bezier(.22,.61,.36,1);
}