.btn-top {
  z-index: 100;
  position: fixed;
  bottom: 75px;
  right: 75px;
  height: 50px;
  width: 50px;
  padding: 0;
  border: 2px solid #fff;
  border-radius: 50%;
  background-color: #df5952;
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s ease-in-out;
}
.btn-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.btn-top i {
  font-size: 25px;
  color: #fff;
}

.btn-top div {
  margin-top: -10px;
  font-family: 'interstate';
  font-weight: 700;
  font-size: 12px;
  color: #fff;
  text-align: center;
}