.r_puw-bottom_left {
  position: fixed;
  transition:
    bottom 0.5s ease,
    left 0.5s ease;
  bottom: 0;
  left: 0;
}

.r_puw-bottom_right {
  position: fixed;
  transition:
    bottom 0.5s ease,
    right 0.5s ease;
  bottom: 0;
  right: 0;
}

.r_puw-top_right {
  position: fixed;
  transition:
    top 0.5s ease,
    right 0.5s ease;
  top: 0rem;
  right: 0rem;
}

.r_puw-top_left {
  position: fixed;
  transition:
    top 0.5s ease,
    left 0.5s ease;
  top: 0;
  left: 0;
}