.game-panel {
  background: repeating-conic-gradient(#f7e9d8 0% 25%, #e8d2b8 0% 50%) 0 0 / 28px 28px;
}
.memory-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  max-width: 420px;
  margin: 1rem auto;
}
.memory-grid button {
  aspect-ratio: 1;
  border: 0;
  background: #0c5c63;
  color: #e6f4ef;
  font-size: clamp(1.2rem, 5vw, 1.8rem);
  font-family: var(--font-display);
  cursor: pointer;
  box-shadow: 3px 3px 0 #c62828;
}
.memory-grid button.is-open,
.memory-grid button.is-matched {
  background: #fff8ef;
  color: #c62828;
  box-shadow: none;
}
.memory-grid button:disabled {
  cursor: default;
}
.timer-row {
  text-align: center;
  font-family: var(--font-mono);
  font-weight: 700;
  background: #fff8ef;
  padding: 0.5rem;
}