#upper {
  cursor: pointer;
  position: fixed;
  bottom: 50px;
  right: 50px;
  z-index: 30;
  height: 100px;
  width: 100px;
  background-image: url("/upload/img/upper/upper-arrow.svg");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 58px;
  border: 5px solid rgba(173, 209, 255, 0.6980392157);
  border-radius: 50px;
  background-color: rgba(173, 209, 255, 0.6980392157);
  animation: slide-in-blurred-bottom 0.6s cubic-bezier(0.23, 1, 0.32, 1) both;
}
#upper.hide {
  animation: slide-out-blurred-bottom 0.45s cubic-bezier(0.755, 0.05, 0.855, 0.06) both;
}
@media screen and (max-width: 768px) {
  #upper {
    display: none;
  }
}

@keyframes slide-in-blurred-bottom {
  0% {
    transform: translateY(1000px) scaleY(2.5) scaleX(0.2);
    transform-origin: 50% 100%;
    filter: blur(40px);
    opacity: 0;
  }
  100% {
    transform: translateY(0) scaleY(1) scaleX(1);
    transform-origin: 50% 50%;
    filter: blur(0);
    opacity: 1;
  }
}
@keyframes slide-out-blurred-bottom {
  0% {
    transform: translateY(0) scaleY(1) scaleX(1);
    transform-origin: 50% 50%;
    filter: blur(0);
    opacity: 1;
  }
  100% {
    transform: translateY(1000px) scaleY(2) scaleX(0.2);
    transform-origin: 50% 100%;
    filter: blur(40px);
    opacity: 0;
  }
}