#seasonBtn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 9000;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform .2s cubic-bezier(.34,1.56,.64,1), box-shadow .2s;
}
#seasonBtn:hover {
  transform: scale(1.15) rotate(-10deg);
}
#seasonCanvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 8999;
}