#page_credits #credit_close {
  color: var(--red);
  position: absolute;
  top: 1rem;
  right: 1rem;
  cursor: pointer;
  font-size: 2rem;
  transition: all 250ms ease-in-out;
}

#page_credits #credit_close:hover {
  transform: rotate(180deg);
}

#page_credits h1 {
  animation: color_rainbow 5s infinite;
}

#page_credits {
  text-align: center;
}