/* ===== PATTERN NEXT (パターン予測) ===== */

.pn-sequence {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  width: 100%;
  max-width: 400px;
  margin: 12px 0;
}

.pn-seq-box {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  background: var(--card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  box-shadow: var(--shadow);
  font-size: 1.1rem;
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
}

.pn-seq-question {
  border-color: var(--primary);
  color: var(--primary);
  font-size: 1.4rem;
  box-shadow: 0 0 12px rgba(139,92,246,0.4);
}

.pn-seq-pop {
  animation: pnPop 0.22s cubic-bezier(0.175, 0.885, 0.32, 1.275) both;
}

@keyframes pnPop {
  0%   { transform: scale(0.5); opacity: 0; }
  70%  { transform: scale(1.1); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}

.pn-choices {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  width: 100%;
  max-width: 400px;
  margin: 8px 0;
}

.pn-choice-btn {
  padding: 16px 8px;
  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);
  font-size: 1.2rem;
  font-weight: 800;
  color: #fff;
  cursor: pointer;
  transition: background 0.12s, transform 0.12s, border-color 0.15s;
}

.pn-choice-btn:hover {
  background: rgba(255,255,255,0.12);
}

.pn-choice-btn:active {
  transform: scale(0.95);
  background: rgba(139, 92, 246, 0.35);
}

.pn-choice-btn.pn-correct {
  border-color: var(--accent);
  background: rgba(16, 185, 129, 0.25);
  color: var(--accent);
}

.pn-choice-btn.pn-wrong {
  border-color: var(--secondary);
  background: rgba(236, 72, 153, 0.25);
  color: var(--secondary);
}