.box-shadow {
  box-shadow: 0px 3px 12px rgba(0,0,0,0.1);
  -webkit-box-shadow: 0px 3px 12px rgba(0,0,0,0.1);
}

#top {
  z-index: 999;
  position: fixed;
  bottom: 20px;
  right: 20px;
  text-decoration: none;
  border-radius: 100%;
  display: none;
  -webkit-transition: all 0.3s ease;
  -moz-transition: all 0.3s ease;
  -ms-transition: all 0.3s ease;
  -o-transition: all 0.3s ease;
  transition: all 0.3s ease;
}