/**
 * Spoiler styling: hidden until clicked/tapped/tabbed-to, revealed via
 * :focus so it works with mouse, touch, and keyboard, with no JavaScript.
 */
.spoiler {
  background-color: #1a1a1a;
  color: transparent;
  border-radius: 3px;
  padding: 0 3px;
  cursor: pointer;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.spoiler:hover,
.spoiler:focus {
  background-color: transparent;
  color: inherit;
  outline: none;
}