.back-to-top {
background: none;
margin: 0;
position: fixed;
bottom: 0;
right: 0;
margin-right: 8px;
margin-bottom: 8px;
width: 40px;
height: 40px;
z-index: 100;
display: none;
text-decoration: none;
color: #0070b0;
/*color: #ffffff;*/
/*background-color: #0070b0;*/
}

.back-to-top i {
  font-size: 40px;
  margin-left: 3px;
}