.spoiler {
  background: rgba(0, 0, 0, 0.85);
  border-radius: 0.25em;
  cursor: pointer;
  filter: blur(0.3em);
  transition: filter 0.15s ease;
  user-select: none;
}

.spoiler.is-revealed {
  filter: none;
  background: rgba(125, 125, 125, 0.18);
  user-select: auto;
}

@media print {
  .spoiler {
    filter: none;
    background: rgba(125, 125, 125, 0.18);
  }
}