/* ============================================
   Virtual Dice Party 2026 - Visual Effects
   ============================================ */

/* フェードイン */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in.delay-1 { transition-delay: 0.1s; }
.fade-in.delay-2 { transition-delay: 0.2s; }
.fade-in.delay-3 { transition-delay: 0.3s; }
.fade-in.delay-4 { transition-delay: 0.4s; }

/* 音符フロート（装飾用） */
.float-note {
  display: inline-block;
  animation: float-note 4s ease-in-out infinite;
}

.float-note.delay-1 { animation-delay: 0.8s; }
.float-note.delay-2 { animation-delay: 1.6s; }
.float-note.delay-3 { animation-delay: 2.4s; }

@keyframes float-note {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-10px) rotate(8deg); }
}

/* グロー脈動 */
.glow-pulse {
  animation: glow-pulse 2.5s ease-in-out infinite;
}

@keyframes glow-pulse {
  0%, 100% { filter: drop-shadow(0 0 6px rgba(255, 210, 63, 0.4)); }
  50% { filter: drop-shadow(0 0 16px rgba(255, 210, 63, 0.9)); }
}

/* グローライン（見出し下） */
.glow-line {
  display: block;
  width: 80px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-orange), var(--color-pink), var(--color-turquoise));
  box-shadow: 0 0 8px rgba(255, 140, 42, 0.6);
  margin: 12px 0 24px;
  border-radius: 2px;
}

.glow-line--center {
  margin-left: auto;
  margin-right: auto;
}

/* prefers-reduced-motion 対応 */
@media (prefers-reduced-motion: reduce) {
  .float-note,
  .glow-pulse {
    animation: none;
  }
}