.back-to-top {
	position: fixed;
	display: none;
	right: 30px;
	bottom: 30px;
	z-index: 11;
	animation: action 1s infinite alternate;
  }
  
  @keyframes action {
	0% {
	  transform: translateY(0);
	}
	100% {
	  transform: translateY(-15px);
	}
  }
  
  * {
	  scroll-behavior: smooth;
  }