.memory-sequence-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  width: 100%;
  max-width: 380px;
  margin: 24px auto;
}

.memory-sequence-panel {
  aspect-ratio: 1 / 1;
  border-radius: 20px;
  border: 4px solid rgba(255, 255, 255, 0.5);
  cursor: pointer;
  opacity: 0.55;
  transition: opacity 0.15s ease, box-shadow 0.15s ease;
}

.memory-sequence-panel:active {
  transform: scale(0.96);
}

.memory-sequence-panel.lit {
  opacity: 1;
  box-shadow: 0 0 30px 6px rgba(255, 255, 255, 0.7);
}