/* Keep dialog and exhibit close controls square, including touch layouts. */
body dialog button[aria-label^="关闭"],
body #close-lab {
  box-sizing: border-box;
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  max-width: 44px;
  max-height: 44px;
  aspect-ratio: 1;
  flex: 0 0 44px;
  padding: 0;
  display: grid;
  place-items: center;
  border-radius: 6px;
  font-size: 24px;
  line-height: 1;
}