/* ========================================
   animations.css — PEGM0M scroll & load animations
   ======================================== */

/* --------------------------------------------------
   ページ読み込み時フェードイン（CSS animation）
   -------------------------------------------------- */
.fade-in {
  opacity: 0;
  animation: fadeIn 0.8s ease forwards;
}

.fade-in-delay {
  opacity: 0;
  animation: fadeIn 0.8s ease 0.3s forwards;
}

@keyframes fadeIn {
  to { opacity: 1; }
}

/* --------------------------------------------------
   スクロール連動アニメーション（JS で .is-visible を付与）
   -------------------------------------------------- */
.slide-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* 遅延クラス（複数要素を順番に出す場合） */
.slide-up:nth-child(2) { transition-delay: 0.1s; }
.slide-up:nth-child(3) { transition-delay: 0.2s; }
.slide-up:nth-child(4) { transition-delay: 0.3s; }

/* --------------------------------------------------
   prefers-reduced-motion：アニメーション無効化
   -------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .fade-in,
  .fade-in-delay {
    opacity: 1;
    animation: none;
  }

  .slide-up {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .slide-up.is-visible {
    opacity: 1;
    transform: none;
  }
}