.back-to-top {
  margin: 0 !important;
  padding: 0 !important;
  background: #fff;
  height: 0px;
  width: 0px;
  overflow: hidden;
  border-radius: 50px;
  -webkit-border-radius: 50px;
  -moz-border-radius: 50px;
  color: transparent;
  clear: both;
  visibility: hidden;
  position: fixed;
  cursor: pointer;
  display: block;
  border: none;
  right: 50px;
  bottom: 75px;
  font-size: 0px;
  outline: 0 !important;
  z-index: 99;
  -webkit-transition: all .3s ease-in-out;
  transition: all .3s ease-in-out;
}

button.back-to-top:hover, button.back-to-top:active, button.back-to-top:focus, {
  outline: 0 !important;
}

button.back-to-top::before, button.back-to-top::after {
  content: "";
  display: block;
  vertical-align: middle;
  border-bottom: solid 10px var(--bs-primary);
  border-left: solid 10px transparent;
  line-height: 0;
  border-right: solid 10px transparent;
  height: 0;
  margin: 18px auto 0;
  width: 0;
  border-radius: 20px;
  visibility: hidden;
}

button.back-to-top.show::after, button.back-to-top.show::before {
  visibility: visible;
}

button.back-to-top::after {
  border-bottom-color: #fff;
  position: relative;
  top: -24px;
}

button.back-to-top.show {
  display: block;
  background: #fff;
  color: #00ab6c;
  font-size: 25px;
  right: 25px;
  bottom: 50px;
  height: 50px;
  width: 50px;
  visibility: visible;
  box-shadow: 0px 2px 4px 1px rgba(0, 0, 0, 0.25);
  -webkit-box-shadow: 0px 2px 4px 1px rgba(0, 0, 0, 0.25);
  -moz-box-shadow: 0px 2px 4px 1px rgba(0, 0, 0, 0.25);
}

button.back-to-top.show:active {
  box-shadow: 0px 4px 8px 2px rgba(0, 0, 0, 0.25);
  -webkit-box-shadow: 0px 4px 8px 2px rgba(0, 0, 0, 0.25);
  -moz-box-shadow: 0px 4px 8px 2px rgba(0, 0, 0, 0.25);
}