.scroll-top-wrapper {
  position: fixed;
  opacity: 0;
  visibility: hidden;
  overflow: hidden;
  text-align: center;
  z-index: 3;
  background-color: #000000;
  color: #fff;
  width: 40px;
  height: 40px;
  line-height: 40px;
  right: 20px;
  bottom: 20px;
  border-radius: 50%;
  -webkit-transition: all 0.5s ease-in-out;
  -moz-transition: all 0.5s ease-in-out;
  -ms-transition: all 0.5s ease-in-out;
  -o-transition: all 0.5s ease-in-out;
  transition: all 0.5s ease-in-out;
  -webkit-box-shadow: 0 1px 3px rgba(34, 25, 25, 0.4));
  -moz-box-shadow: 0 1px 3px rgba(34, 25, 25, 0.4);
  box-shadow: 0 1px 3px rgba(34, 25, 25, 0.4);
}

.scroll-top-wrapper:hover {
  background-color: #f8f8f8;
  color: #000000;
}

.scroll-top-wrapper.show {
   visibility:visible;
   cursor:pointer;
   opacity: 1.0;
}
.scroll-top-wrapper i.fa {
  line-height: inherit;
}