.pp-grid {
  display: grid;
  grid-template-columns: repeat(var(--pp-cols, 4), 1fr);
  gap: 10px;
  width: 100%;
  max-width: 480px;
  margin: 6px auto 0;
}

.pp-card {
  aspect-ratio: 3 / 4;
  border: none;
  background: none;
  padding: 0;
  cursor: pointer;
  perspective: 600px;
}

.pp-card__inner {
  position: relative;
  width: 100%;
  height: 100%;
  display: block;
  transform-style: preserve-3d;
  transition: transform 0.4s ease;
  border-radius: 12px;
}
.pp-card.is-revealed .pp-card__inner,
.pp-card.is-matched .pp-card__inner {
  transform: rotateY(180deg);
}

.pp-card__face {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  backface-visibility: hidden;
  font-size: clamp(1.6rem, 6vw, 2.2rem);
}
.pp-card__face--back {
  background: var(--color-primary-dark);
  color: #fff;
  font-size: 1.3rem;
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.25);
}
.pp-card__face--front {
  background: #fff;
  border: 2px solid var(--color-border);
  transform: rotateY(180deg);
}

.pp-card.is-matched .pp-card__face--front {
  background: #eafaf0;
  border-color: var(--color-success);
  animation: pp-pop 0.35s ease;
}

@keyframes pp-pop {
  0% { transform: rotateY(180deg) scale(1); }
  50% { transform: rotateY(180deg) scale(1.12); }
  100% { transform: rotateY(180deg) scale(1); }
}

@media (max-width: 420px) {
  .pp-grid { max-width: 320px; gap: 7px; }
}