.klotski-board {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(5, 1fr);
  aspect-ratio: 4 / 5;
  gap: 8px;
  padding: 12px;
  border: 8px solid #25372f;
  border-radius: 8px;
  background: #31483d;
}
.klotski-block {
  z-index: 1;
  border: 2px solid rgba(0,0,0,.24);
  border-radius: 8px;
  background: #f2d28c;
  color: #5f381d;
  font-size: 24px;
  font-weight: 900;
}
.klotski-block.main {
  background: #c58b2b;
  font-size: 30px;
}
.exit-label {
  position: absolute;
  left: 50%;
  bottom: 4px;
  transform: translateX(-50%);
  color: #f2d28c;
  font-weight: 900;
  letter-spacing: 4px;
}