/* アニメーション CSS（CLAUDE.md技法リファレンス準拠） */

/* Scroll-triggered Animation（技法①） */
.fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.6s ease;
}

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

/* Stagger効果用の遅延クラス */
.fade-up:nth-child(1) { transition-delay: 0.1s; }
.fade-up:nth-child(2) { transition-delay: 0.2s; }
.fade-up:nth-child(3) { transition-delay: 0.3s; }
.fade-up:nth-child(4) { transition-delay: 0.4s; }
.fade-up:nth-child(5) { transition-delay: 0.5s; }
.fade-up:nth-child(6) { transition-delay: 0.6s; }

/* フェードイン（左から） */
.fade-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: all 0.6s ease;
}

.fade-left.animate {
  opacity: 1;
  transform: translateX(0);
}

/* フェードイン（右から） */
.fade-right {
  opacity: 0;
  transform: translateX(40px);
  transition: all 0.6s ease;
}

.fade-right.animate {
  opacity: 1;
  transform: translateX(0);
}

/* スケールアニメーション */
.scale-up {
  opacity: 0;
  transform: scale(0.9);
  transition: all 0.6s ease;
}

.scale-up.animate {
  opacity: 1;
  transform: scale(1);
}

/* Micro Animation（技法⑨） - ボタンホバー効果 */
.cta-button {
  position: relative;
  overflow: hidden;
  transform: translateZ(0);
}

.cta-button::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--color-accent), var(--color-main));
  transform: translateY(100%);
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  z-index: -1;
}

.cta-button:hover::before {
  transform: translateY(0);
}

.cta-button span {
  position: relative;
  z-index: 1;
}

/* リンク下線アニメーション */
.nav-list a {
  position: relative;
}

.nav-list a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-main);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.nav-list a:hover::after {
  transform: scaleX(1);
  width: 100%;
}

/* カードホバーエフェクト */
.problem-card,
.service-card,
.case-card,
.pricing-card,
.news-card {
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.problem-card:hover,
.service-card:hover,
.case-card:hover,
.pricing-card:hover,
.news-card:hover {
  transform: translateY(-6px);
}

/* フォームフィールドフォーカス効果 */
.form-group input,
.form-group select,
.form-group textarea {
  transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  transform: translateY(-2px);
}

/* フローステップホバー効果 */
.flow-step {
  transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.flow-step:hover {
  transform: translateY(-5px) scale(1.02);
}

/* ロゴアニメーション */
.logo h1 {
  transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.logo:hover h1 {
  transform: scale(1.05);
  color: var(--color-accent);
}

/* アイコン回転効果 */
.contact-icon,
.problem-icon,
.service-icon {
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.contact-method:hover .contact-icon,
.problem-card:hover .problem-icon,
.service-card:hover .service-icon {
  transform: rotate(5deg) scale(1.1);
}

/* FAQ トグルアニメーション */
.faq-toggle {
  transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.faq-toggle[aria-expanded="true"] {
  transform: rotate(180deg);
  color: var(--color-accent);
}

.faq-answer {
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.faq-answer.active {
  opacity: 1;
  max-height: 200px;
  padding: 0 2rem 1.5rem;
}

/* Wave アニメーション */
.wave-divider {
  animation: wave-float 6s ease-in-out infinite;
}

@keyframes wave-float {
  0%, 100% {
    transform: translateX(0);
  }
  50% {
    transform: translateX(-10px);
  }
}

/* パルスアニメーション（CTA用） */
.hero-cta {
  animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% {
    box-shadow: 0 4px 20px rgba(139, 154, 127, 0.3);
  }
  50% {
    box-shadow: 0 6px 25px rgba(139, 154, 127, 0.5);
  }
}

/* 数字カウンターエフェクト（選ばれる理由） */
.reason-number {
  animation: bounce-in 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes bounce-in {
  0% {
    transform: scale(0) rotate(-180deg);
    opacity: 0;
  }
  50% {
    transform: scale(1.2) rotate(-90deg);
    opacity: 0.8;
  }
  100% {
    transform: scale(1) rotate(0deg);
    opacity: 1;
  }
}

/* ローディング状態のスケルトン */
.skeleton {
  background: linear-gradient(90deg,
    var(--color-light) 25%,
    var(--color-base) 50%,
    var(--color-light) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
}

@keyframes skeleton-loading {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* スムーススクロール強化 */
html {
  scroll-behavior: smooth;
}

/* フォーカス可視化 */
*:focus-visible {
  outline: 2px solid var(--color-main);
  outline-offset: 2px;
  border-radius: 4px;
}

/* 画像の遅延ロード効果 */
.image-placeholder {
  position: relative;
  overflow: hidden;
}

.image-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(45deg,
    transparent 25%,
    rgba(255, 255, 255, 0.5) 50%,
    transparent 75%);
  transform: translateX(-100%);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

/* スクロール進行インジケーター */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-main), var(--color-accent));
  z-index: 9999;
  transition: width 0.1s ease-out;
}

/* パフォーマンス最適化 */
.cta-button,
.problem-card,
.service-card,
.case-card,
.pricing-card,
.news-card,
.flow-step,
.faq-question {
  will-change: transform;
}

/* ホバー後の最適化 */
.problem-card:not(:hover),
.service-card:not(:hover),
.case-card:not(:hover),
.pricing-card:not(:hover),
.news-card:not(:hover) {
  will-change: auto;
}

/* タッチデバイス用の調整 */
@media (hover: none) and (pointer: coarse) {
  .cta-button:hover,
  .problem-card:hover,
  .service-card:hover,
  .case-card:hover,
  .pricing-card:hover,
  .news-card:hover,
  .flow-step:hover {
    transform: none;
  }

  .contact-method:hover .contact-icon,
  .problem-card:hover .problem-icon,
  .service-card:hover .service-icon {
    transform: none;
  }

  /* タッチ時のフィードバック */
  .cta-button:active,
  .problem-card:active,
  .service-card:active,
  .case-card:active,
  .pricing-card:active {
    transform: scale(0.98);
  }
}

/* 高コントラストモード対応 */
@media (prefers-contrast: high) {
  .fade-up,
  .fade-left,
  .fade-right,
  .scale-up {
    opacity: 1;
    transform: none;
  }
}

/* アニメーション無効化設定（技法リファレンス準拠） */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  .fade-up,
  .fade-left,
  .fade-right,
  .scale-up {
    opacity: 1 !important;
    transform: none !important;
  }

  .wave-divider {
    animation: none !important;
  }

  .hero-cta {
    animation: none !important;
  }

  .skeleton {
    animation: none !important;
  }

  html {
    scroll-behavior: auto !important;
  }
}