.memory-card {
  background: var(--game-card-bg);
  border: 1px solid var(--game-border);
  border-radius: 20px;
  padding: clamp(1rem, 4vw, 1.75rem);
  box-shadow: var(--game-shadow);
  color: var(--game-fg);
}

.memory-header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.memory-header h2 {
  margin: 0 0 0.35rem;
  font-size: 1.3rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--game-fg);
}

.memory-header p {
  margin: 0;
  color: var(--game-card-muted);
}

.memory-stats {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.memory-stat {
  font-weight: 700;
  color: var(--game-fg);
}

#play-again-btn {
  border: none;
  background: linear-gradient(
    140deg,
    var(--game-accent),
    var(--game-accent-secondary)
  );
  color: #fff;
  padding: 0.65rem 1.5rem;
  border-radius: 999px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.15);
  transition:
    transform 0.12s ease,
    box-shadow 0.12s ease;
}

#play-again-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 26px rgba(0, 0, 0, 0.18);
}

.memory-grid {
  display: grid;
  grid-template-columns: repeat(
    auto-fit,
    minmax(clamp(90px, 22vw, 140px), 1fr)
  );
  gap: 0.85rem;
  width: min(520px, 100%);
  margin: 0 auto;
}

.memory-tile {
  position: relative;
  width: 100%;
  padding-top: 120%;
  perspective: 1000px;
}

.memory-tile button {
  position: absolute;
  inset: 0;
  border: none;
  border-radius: 18px;
  cursor: pointer;
  background: transparent;
  padding: 0;
  transform-style: preserve-3d;
}

.memory-face {
  position: absolute;
  inset: 0;
  border-radius: 18px;
  overflow: hidden;
  backface-visibility: hidden;
  transition: transform 0.4s ease;
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.25);
}

.memory-face--back {
  background: linear-gradient(
    135deg,
    var(--game-accent),
    var(--game-accent-secondary)
  );
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  letter-spacing: 0.15em;
  color: #fff;
  font-size: 1.5rem;
}

.memory-face--front {
  transform: rotateY(180deg);
  background: #fff;
}

.memory-face img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.memory-tile button:focus-visible {
  outline: 3px solid var(--game-accent);
  outline-offset: 3px;
}

.memory-tile.is-flipped .memory-face--front {
  transform: rotateY(0);
}

.memory-tile.is-flipped .memory-face--back {
  transform: rotateY(180deg);
}

.memory-tile.is-matched .memory-face--front {
  box-shadow: inset 0 0 0 3px rgba(34, 197, 94, 0.7);
}

.memory-status {
  margin-top: 1.25rem;
  min-height: 1.4em;
  text-align: center;
  font-weight: 600;
  color: var(--game-card-muted);
}

@media (max-width: 540px) {
  .memory-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}