/* ------------------------------------------------------------------- */
/*                        space setting                                */
/* ------------------------------------------------------------------- */
.reveal_vspace {
  display: block;
  height: var(--vspace-height, 1em); /* Default height: 1em */
}

.reveal_hspace {
  display: inline-block;
  width: var(--hspace-width, 1em); /* Default height: 1em */
}