/* アニメーション用CSS */

/* フェードイン要素の初期状態 */
.fade-in {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

/* アニメーション実行状態 */
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 段階的なアニメーション遅延 */
.fade-in:nth-child(1) { transition-delay: 0s; }
.fade-in:nth-child(2) { transition-delay: 0.1s; }
.fade-in:nth-child(3) { transition-delay: 0.2s; }
.fade-in:nth-child(4) { transition-delay: 0.3s; }
.fade-in:nth-child(5) { transition-delay: 0.4s; }
.fade-in:nth-child(6) { transition-delay: 0.5s; }

/* グリッドアイテム用の段階的遅延 */
.concept__item.fade-in:nth-child(1) { transition-delay: 0.1s; }
.concept__item.fade-in:nth-child(2) { transition-delay: 0.2s; }
.concept__item.fade-in:nth-child(3) { transition-delay: 0.3s; }

.menu__item.fade-in:nth-child(1) { transition-delay: 0.1s; }
.menu__item.fade-in:nth-child(2) { transition-delay: 0.2s; }
.menu__item.fade-in:nth-child(3) { transition-delay: 0.3s; }
.menu__item.fade-in:nth-child(4) { transition-delay: 0.4s; }

.gallery__item.fade-in:nth-child(1) { transition-delay: 0.1s; }
.gallery__item.fade-in:nth-child(2) { transition-delay: 0.2s; }
.gallery__item.fade-in:nth-child(3) { transition-delay: 0.3s; }
.gallery__item.fade-in:nth-child(4) { transition-delay: 0.4s; }
.gallery__item.fade-in:nth-child(5) { transition-delay: 0.5s; }

.review.fade-in:nth-child(1) { transition-delay: 0.1s; }
.review.fade-in:nth-child(2) { transition-delay: 0.2s; }
.review.fade-in:nth-child(3) { transition-delay: 0.3s; }

/* ホバーアニメーション */
.concept__item {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.menu__item {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.review {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* ボタンのホバーアニメーション */
.btn {
  transition: all 0.3s ease;
}

.btn:hover {
  transition: all 0.2s ease;
}

/* ナビゲーションアニメーション */
.nav__link {
  position: relative;
  transition: color 0.3s ease;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width 0.3s ease;
}

.nav__link:hover::after {
  width: 100%;
}

/* フォーム要素のフォーカスアニメーション */
.form__input,
.form__textarea {
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form__input:focus,
.form__textarea:focus {
  box-shadow: 0 0 0 3px rgba(230, 126, 34, 0.1);
}

/* スクロール時のヘッダーアニメーション */
.header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 2px 20px rgba(139, 69, 19, 0.1);
}

/* ローディングアニメーション */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero__content > * {
  animation: fadeInUp 0.6s ease forwards;
}

.hero__title {
  animation-delay: 0.2s;
}

.hero__subtitle {
  animation-delay: 0.4s;
}

.hero__cta {
  animation-delay: 0.6s;
}

/* パララックス効果用 */
.parallax-element {
  transform: translateY(0);
  transition: transform 0.1s ease-out;
}

/* スムーススクロールのためのオフセット調整 */
.section {
  scroll-margin-top: 80px;
}

/* アクセシビリティ：アニメーション無効化設定 */
@media (prefers-reduced-motion: reduce) {
  .fade-in,
  .concept__item,
  .menu__item,
  .review,
  .btn,
  .nav__link,
  .form__input,
  .form__textarea {
    transition: none;
  }

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

  .hero__content > * {
    animation: none;
  }
}

/* モバイル用の軽量アニメーション */
@media (max-width: 767px) {
  .fade-in {
    transition-duration: 0.4s;
  }

  .concept__item:hover,
  .menu__item:hover,
  .review:hover {
    transform: none;
  }
}