/* differences: rules used only by the differences pages (loaded after base.css). */
/* Spot the Difference: two pictures, one above the other or side by side
   on wide screens; invisible buttons over each picture's 5 x 3 areas; a
   found difference gets a thick circle, the hint a dashed frame. */
.df-pictures {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

.df-pic {
  position: relative;
  flex: 1 1 400px;
  max-width: 540px;
  margin: 0 0.3rem 0.6rem;
}

.df-svg {
  display: block;
  width: 100%;
  height: auto;
}

.df-areas {
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  grid-template-rows: repeat(3, 1fr);
}

.df-area {
  min-width: 0;
  min-height: 0;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.df-area:focus-visible {
  outline: 3px solid var(--text);
  outline-offset: -3px;
}

.df-found {
  fill: none;
  stroke: #141413;
  stroke-width: 4.5;
}

.df-hint {
  fill: none;
  stroke: #141413;
  stroke-width: 3;
  stroke-dasharray: 7 5;
}

/* Spot the Difference, mode "Picture search": the drawings to find as
   small pictures (found ones are crossed out), the room's name, then one
   large picture of the room. */
.df-search-pic {
  max-width: 600px;
  margin: 0 auto 0.5rem;
}

.df-room-name {
  text-align: center;
  margin: 0 0 0.3rem;
}

.df-room-name:empty {
  display: none;
}

.df-targets-label {
  text-align: center;
  font-weight: 700;
  margin: 0.2rem 0;
}

.df-targets {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  margin: 0 0 0.5rem;
  padding: 0;
}

.df-target {
  width: 3.4rem;
  height: 3.4rem;
  margin: 0 0.25rem 0.4rem;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
}

.df-target svg {
  display: block;
  width: 100%;
  height: 100%;
}

.df-target-found {
  border-style: dashed;
}