/* ===== カードフリップ ===== */

.cflip-info {
  font-size: 0.85rem;
  font-weight: 600;
  color: rgba(255,255,255,0.65);
  text-align: center;
  margin: 4px 0;
}

.cflip-stage {
  width: 100%;
  max-width: 400px;
  padding: 10px;
  background: var(--card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  box-sizing: border-box;
  margin: 6px 0;
}

.cflip-grid {
  display: grid;
  gap: 7px;
}

.cflip-grid-4 { grid-template-columns: repeat(4, 1fr); }
.cflip-grid-5 { grid-template-columns: repeat(5, 1fr); }

.cflip-card {
  aspect-ratio: 1;
  perspective: 500px;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
}

.cflip-inner {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.35s ease;
  border-radius: 10px;
}

.cflip-card.flipped .cflip-inner {
  transform: rotateY(180deg);
}

.cflip-face {
  position: absolute;
  inset: 0;
  border-radius: 10px;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cflip-back {
  background: linear-gradient(135deg, var(--accent), var(--primary));
  font-size: 1.1rem;
  color: rgba(255,255,255,0.4);
}

.cflip-front {
  transform: rotateY(180deg);
  background: rgba(255,255,255,0.95);
  font-size: 1.6rem;
}

/* Smaller emoji for 5-col grid */
.cflip-grid-5 .cflip-front { font-size: 1.3rem; }

.cflip-card.matched .cflip-inner {
  opacity: 0.45;
  pointer-events: none;
}

.cflip-card.matched .cflip-face.cflip-front {
  background: rgba(16, 185, 129, 0.25);
}

.cflip-card.shake .cflip-inner {
  animation: cflipShake 0.38s ease both;
}

@keyframes cflipShake {
  20% { transform: rotateY(180deg) translateX(-4px); }
  60% { transform: rotateY(180deg) translateX(4px); }
  100% { transform: rotateY(180deg) translateX(0); }
}