.back-to-top {
    margin-right: 7px;
 position: fixed;
 bottom: 3px;
    right: -25px;
 width: 64px;
 height: 64px;
 z-index: 9999;
 cursor: pointer;
 text-decoration: none;
 transition: opacity 0.2s ease-out;
 background-image: url(top.png);
}
.back-to-top:hover{
 opacity: 0.7;
}

.back-to-top  i.fas.fa-chevron-circle-up.fa-lg {
color: #563d7c;
    font-size: 46px;
}


  @media only screen and (max-width: 736px){
  /*.back-to-top{
    position: absolute;
    bottom: 9%;
    margin-right: 12px;
    margin: 18px;
  }*/
  .back-to-top i.fas.fa-chevron-circle-up.fa-lg {
    
    font-size: 25px;}
}