/* ==========================================================================
   プロダクトランディングページ専用スタイル
   ========================================================================== */

/* ==========================================================================
   プロダクトヘッダー
   ========================================================================== */
.product-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
  z-index: 1000;
}

.product-header .container {
  height: 100%;
  display: flex;
  align-items: center;
}

.product-header__home {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--color-text-secondary);
  font-weight: 500;
  transition: var(--transition);
}

.product-header__home:hover {
  color: var(--color-primary);
}

.product-header__home svg {
  width: 20px;
  height: 20px;
}

/* ==========================================================================
   プロダクトヒーロー
   ========================================================================== */
.product-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 64px;
  background: linear-gradient(135deg, var(--color-background) 0%, #ffffff 100%);
  position: relative;
  overflow: hidden;
}

.product-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(29, 80, 22, 0.03) 0%, transparent 70%);
  animation: rotate 30s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.product-hero__content {
  text-align: center;
  position: relative;
  z-index: 1;
}

.product-hero__icon {
  width: 180px;
  height: 180px;
  margin: 0 auto var(--spacing-xl);
  animation: pulse 2s ease-in-out infinite;
  background-color: var(--color-white);
  border-radius: 32px;
  padding: var(--spacing-lg);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

.product-hero__icon-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 16px;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.product-hero__title {
  font-size: 64px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

.product-hero__subtitle {
  font-size: 32px;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.4;
}

.product-hero__description {
  font-size: 18px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-xl);
}

.product-hero__cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
}

/* ==========================================================================
   フィーチャーセクション
   ========================================================================== */
.product-features {
  background-color: var(--color-white);
}

.product-features__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xxl);
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.feature-card {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-lg);
  background-color: var(--color-background);
  border-radius: 16px;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.feature-card__icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: 20px;
  color: var(--color-white);
}

.feature-card__icon svg {
  width: 48px;
  height: 48px;
}

.feature-card__title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.feature-card__description {
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* ==========================================================================
   ユースケースセクション
   ========================================================================== */
.product-usecases {
  background-color: var(--color-background);
}

.usecases__list {
  display: grid;
  gap: var(--spacing-lg);
}

.usecase {
  background-color: var(--color-white);
  padding: var(--spacing-lg);
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  transition: var(--transition);
}

.usecase:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.usecase__title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.usecase__description {
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* 注意事項 */
.usecases__notice {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg);
  background-color: rgba(139, 111, 71, 0.08);
  border-radius: 12px;
  border: 1px solid rgba(139, 111, 71, 0.2);
}

.usecases__notice-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-weight: 600;
  color: var(--color-secondary);
  margin-bottom: var(--spacing-sm);
}

.usecases__notice-title svg {
  flex-shrink: 0;
}

.usecases__notice-text {
  color: var(--color-text-secondary);
  line-height: 1.8;
  font-size: 14px;
}

/* ==========================================================================
   使い方セクション
   ========================================================================== */
.product-how {
  background-color: var(--color-white);
}

.how__steps {
  display: grid;
  gap: var(--spacing-xl);
  max-width: 600px;
  margin: 0 auto;
}

.how__step {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: var(--spacing-lg);
  align-items: flex-start;
}

.how__step-number {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
}

.how__step-content {
  padding-top: 4px;
}

.how__step-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
}

.how__step-description {
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   ダウンロードセクション
   ========================================================================== */
.product-download {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  color: var(--color-white);
  text-align: center;
}

.product-download .section__title {
  color: var(--color-white);
}

.download__content {
  max-width: 600px;
  margin: 0 auto;
}

.download__status {
  font-size: 18px;
  margin-bottom: var(--spacing-xl);
  opacity: 0.9;
  line-height: 1.8;
}

.download__platforms {
  margin-top: var(--spacing-xl);
}

.download__platforms-title {
  font-size: 14px;
  opacity: 0.7;
  margin-bottom: var(--spacing-sm);
}

.download__platforms-list {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
}

.platform-badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background-color: rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
}

/* ==========================================================================
   プロダクトフッター
   ========================================================================== */
.product-footer {
  background-color: #1A1A1A;
  color: var(--color-white);
  padding: var(--spacing-xl) 0;
  text-align: center;
}

.product-footer__content {
  margin-bottom: var(--spacing-lg);
}

.product-footer__brand {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

.product-footer__links {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  list-style: none;
}

.product-footer__links a {
  color: var(--color-white);
  opacity: 0.8;
  font-size: 14px;
  transition: var(--transition);
}

.product-footer__links a:hover {
  opacity: 1;
}

.product-footer__copyright {
  font-size: 12px;
  opacity: 0.5;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* ==========================================================================
   レスポンシブ対応
   ========================================================================== */
@media (max-width: 767px) {
  .product-hero__title {
    font-size: 40px;
  }
  
  .product-hero__subtitle {
    font-size: 24px;
  }
  
  .product-hero__icon {
    width: 140px;
    height: 140px;
  }
  
  .product-hero__cta {
    flex-direction: column;
    align-items: center;
  }
  
  .product-hero__cta .btn {
    width: 100%;
    max-width: 280px;
  }
  
  .product-features__grid {
    grid-template-columns: 1fr;
  }
  
  .feature-card {
    max-width: 400px;
    margin: 0 auto;
  }
  
  .how__step {
    display: flex;
    flex-direction: column;
    text-align: center;
  }
  
  .how__step-content {
    padding-top: 0;
  }
  
  .product-footer__links {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
}