.to_top {
  align-items: center;
  justify-content: center;
  visibility: hidden;
  position: fixed;
  top: 60%;
  right: 15px;
  width: 50px;
  height: 50px;
  z-index: 3;
  opacity: 1;
  color: #fff;
  cursor: pointer;
  border: 2px solid #fff;
  transition: top 1s ease;
}
.to_top i {
  font-weight: bolder;
  font-style: normal;
  font-variant: normal;
  text-rendering: auto;
  line-height: 1;
  font-size: 35px;
}
.to_top.white_to_top {
  color: #ff6200;
  border: 2px solid #ff6200;
}
@media only screen and (max-width: 576px) {
  .to_top {
    top: 80%;
  }
}