.memory-wrap {
  display: flex;
  justify-content: center;
}

.memory-board {
  display: grid;
  gap: 10px;
  width: min(560px, 100%);
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: color-mix(in srgb, var(--panel) 88%, transparent);
  box-shadow: var(--shadow);
  perspective: 900px;
}

.memory-card {
  position: relative;
  aspect-ratio: 1 / 1;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  transform-style: preserve-3d;
  transition: transform 0.28s ease;
}

.memory-card.is-flipped,
.memory-card.is-matched {
  transform: rotateY(180deg);
}

.memory-card.is-matched {
  cursor: default;
}

.memory-face {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 10px;
  backface-visibility: hidden;
  font-size: clamp(22px, 5vw, 34px);
  line-height: 1;
}

.memory-face.is-back {
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--primary) 22%, transparent),
    color-mix(in srgb, var(--accent) 30%, transparent)
  );
  color: #ffffff;
  font-size: clamp(16px, 3vw, 22px);
  font-weight: 800;
}

.memory-face.is-front {
  background: color-mix(in srgb, var(--panel) 96%, transparent);
  transform: rotateY(180deg);
}

.memory-card.is-matched .memory-face.is-front {
  background: color-mix(in srgb, var(--ok) 22%, transparent);
  border-color: color-mix(in srgb, var(--ok) 45%, var(--line));
}

.memory-card.is-shake {
  animation: memory-shake 0.32s ease;
}

@keyframes memory-shake {
  0%, 100% { transform: rotateY(180deg) translateX(0); }
  25% { transform: rotateY(180deg) translateX(-4px); }
  75% { transform: rotateY(180deg) translateX(4px); }
}

[data-theme="dark"] .memory-board {
  background: rgba(38, 38, 38, 0.92);
}

[data-theme="dark"] .memory-face.is-front {
  background: #2f2f33;
}

@media (max-width: 640px) {
  .memory-board {
    gap: 7px;
    padding: 10px;
  }
}