/* ============================================================
   H/MIX GALLERY — Tutorial Hints
   "気配" としての機能紹介。説明ではなく、詩的な誘い。
   ============================================================ */

.tutorial-hint {
  position: absolute;
  z-index: 1100;
  pointer-events: none;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.tutorial-hint.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.tutorial-hint__bubble {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 20px;
  background: rgba(10, 22, 16, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(100, 180, 130, 0.20);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
  font-family: 'Noto Serif JP', serif;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: rgba(180, 225, 200, 0.85);
  white-space: nowrap;
  line-height: 1.5;
}

/* パルスアニメーション（対象ボタンへの誘導） */
.tutorial-pulse {
  animation: tutorialPulse 2.5s ease-in-out 1;
}

@keyframes tutorialPulse {
  0%   { box-shadow: 0 0 0 0 rgba(154, 223, 180, 0.25); }
  50%  { box-shadow: 0 0 0 8px rgba(154, 223, 180, 0); }
  100% { box-shadow: 0 0 0 0 rgba(154, 223, 180, 0); }
}

/* 完了メッセージ */
.tutorial-hint--complete .tutorial-hint__bubble {
  border-color: rgba(154, 223, 180, 0.35);
  color: rgba(154, 223, 180, 0.90);
}

/* prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  .tutorial-hint {
    transition: opacity 0.3s ease;
    transform: none !important;
  }
  .tutorial-pulse {
    animation: none !important;
  }
}