span.spoiler {
  filter: blur(0.25rem);
  transition: filter var(--transition);

  &:focus,
  &:hover {
    filter: none;
  }

  &.solid {
    filter: none;
    transition:
      background-color var(--transition),
      color var(--transition);
    border-radius: var(--rounded-corner-small);
    background-color: var(--fg-muted-1);
    color: transparent;

    &:focus,
    &:hover {
      background-color: transparent;
      color: inherit;
    }
  }
}