/* ================================================================
   トップページ固有スタイル (top.css)
   - ヒーロースライダー (TOP-001)
   - 最新NEWS (TOP-004)
   - 事業紹介 (TOP-002)
   - Instagram連携 (TOP-003)
   ================================================================ */

/* ----------------------------------------------------------------
   1. ヒーロースライダー (TOP-001)
   ---------------------------------------------------------------- */
.hero {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
  margin-top: var(--header-height);
}

.hero__slider {
  position: relative;
  width: 100%;
  height: 100%;
}

.hero__slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1.2s ease-in-out;
}

.hero__slide.active {
  opacity: 1;
}

.hero__slide-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.05);
  transition: transform 8s ease-out;
}

.hero__slide.active .hero__slide-image {
  transform: scale(1);
}

.hero__overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    rgba(26, 60, 94, 0.7) 0%,
    rgba(26, 60, 94, 0.3) 50%,
    rgba(0, 0, 0, 0.2) 100%
  );
}

.hero__content {
  position: absolute;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
  width: 100%;
  padding: 0 var(--spacing-md);
}

.hero__content-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero__catchcopy-sub {
  font-family: var(--font-heading);
  font-size: var(--font-size-md);
  font-weight: 400;
  color: var(--color-accent-light);
  letter-spacing: 0.15em;
  margin-bottom: var(--spacing-sm);
  opacity: 0;
  transform: translateY(20px);
  animation: heroTextIn 0.8s ease-out 0.5s forwards;
}

.hero__catchcopy {
  font-family: var(--font-heading);
  font-size: var(--font-size-hero);
  font-weight: 700;
  color: var(--color-text-white);
  line-height: 1.3;
  letter-spacing: 0.05em;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
  opacity: 0;
  transform: translateY(20px);
  animation: heroTextIn 0.8s ease-out 0.8s forwards;
}

.hero__catchcopy span {
  display: inline-block;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

@keyframes heroTextIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* スライダーインジケーター */
.hero__indicators {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 10;
}

.hero__indicator {
  width: 40px;
  height: 3px;
  background-color: rgba(255, 255, 255, 0.4);
  border-radius: 2px;
  cursor: pointer;
  transition: all var(--transition-base);
  overflow: hidden;
  position: relative;
}

.hero__indicator.active {
  background-color: rgba(255, 255, 255, 0.4);
}

.hero__indicator.active::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 0;
  background-color: var(--color-text-white);
  border-radius: 2px;
  animation: indicatorFill 5s linear forwards;
}

@keyframes indicatorFill {
  to {
    width: 100%;
  }
}

.hero__scroll-indicator {
  position: absolute;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.6);
  font-size: var(--font-size-xs);
  letter-spacing: 0.15em;
  animation: scrollBounce 2s ease-in-out infinite;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.6), transparent);
}

@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ----------------------------------------------------------------
   2. 最新NEWSセクション (TOP-004)
   ---------------------------------------------------------------- */
.news-section {
  padding: var(--spacing-xxl) 0;
  background-color: var(--color-bg);
}

.news__list {
  max-width: 800px;
  margin: 0 auto;
}

.news__item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.news__item:hover {
  background-color: var(--color-bg-dark);
  padding-left: var(--spacing-sm);
  border-radius: var(--radius-sm);
}

.news__date {
  flex-shrink: 0;
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  letter-spacing: 0.05em;
  min-width: 110px;
}

.news__category {
  flex-shrink: 0;
  display: inline-block;
  padding: 2px 12px;
  background-color: var(--color-primary);
  color: var(--color-text-white);
  font-size: var(--font-size-xs);
  font-weight: 500;
  border-radius: 50px;
  letter-spacing: 0.05em;
  min-width: max-content;
}

.news__category--event {
  background-color: #2e7d6a;
}

.news__category--project {
  background-color: #8b5e3c;
}

.news__category--recruit {
  background-color: #5a6abf;
}

.news__title {
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition-fast);
  line-height: 1.6;
}

.news__item:hover .news__title {
  color: var(--color-primary);
}

.news__more {
  display: flex;
  justify-content: center;
  margin-top: var(--spacing-lg);
}

.btn-more {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 0.8rem 2.5rem;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: 50px;
  letter-spacing: 0.08em;
  transition: all var(--transition-base);
}

.btn-more::after {
  content: '→';
  transition: transform var(--transition-base);
}

.btn-more:hover {
  background-color: var(--color-primary);
  color: var(--color-text-white);
}

.btn-more:hover::after {
  transform: translateX(4px);
}

/* ----------------------------------------------------------------
   3. 事業紹介セクション (TOP-002)
   ---------------------------------------------------------------- */
.business-section {
  padding: var(--spacing-xxl) 0;
  background-color: var(--color-bg-dark);
}

.business__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.business__card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.business__card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.business__card-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.business__card:hover .business__card-image {
  transform: scale(1.08);
}

.business__card-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-lg) var(--spacing-md);
  background: linear-gradient(to top, rgba(26, 60, 94, 0.9), transparent);
  color: var(--color-text-white);
}

.business__card-label {
  font-family: var(--font-heading);
  font-size: var(--font-size-xs);
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent-light);
  margin-bottom: 4px;
}

.business__card-title {
  font-size: var(--font-size-md);
  font-weight: 700;
  letter-spacing: 0.05em;
}

.business__card-arrow {
  position: absolute;
  bottom: var(--spacing-md);
  right: var(--spacing-md);
  width: 40px;
  height: 40px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-white);
  font-size: var(--font-size-sm);
  transition: all var(--transition-base);
}

.business__card:hover .business__card-arrow {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  transform: translateX(4px);
}

/* ----------------------------------------------------------------
   4. Instagramセクション (TOP-003)
   ---------------------------------------------------------------- */
.instagram-section {
  padding: var(--spacing-xxl) 0;
  background-color: var(--color-bg);
}

.instagram__header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.instagram__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
  color: white;
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-sm);
}

.instagram__account {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  letter-spacing: 0.05em;
}

.instagram__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xs);
}

.instagram__item {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.instagram__item-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.instagram__item:hover .instagram__item-image {
  transform: scale(1.1);
}

.instagram__item-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(26, 60, 94, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.instagram__item:hover .instagram__item-overlay {
  opacity: 1;
}

.instagram__item-icon {
  color: var(--color-text-white);
  font-size: var(--font-size-lg);
}

/* プレースホルダースタイル（API連携前） */
.instagram__placeholder {
  background: linear-gradient(135deg, var(--color-bg-dark), var(--color-border));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
}

.instagram__follow {
  text-align: center;
  margin-top: var(--spacing-lg);
}

.btn-instagram {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 0.8rem 2.5rem;
  background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
  color: var(--color-text-white);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: 50px;
  letter-spacing: 0.08em;
  transition: all var(--transition-base);
}

.btn-instagram:hover {
  color: var(--color-text-white);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(220, 39, 67, 0.3);
}

/* ----------------------------------------------------------------
   5. レスポンシブ
   ---------------------------------------------------------------- */

/* タブレット */
@media (max-width: 1024px) {
  .hero {
    min-height: 500px;
    height: 70vh;
  }

  .business__grid {
    gap: var(--spacing-md);
  }

  .instagram__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* スマートフォン */
@media (max-width: 767px) {
  .hero {
    min-height: 450px;
    height: 60vh;
  }

  .hero__catchcopy {
    font-size: var(--font-size-xxl);
  }

  .hero__scroll-indicator {
    display: none;
  }

  .news__item {
    flex-direction: column;
    gap: var(--spacing-xs);
  }

  .news__date {
    min-width: auto;
  }

  .business__grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .business__card-image {
    aspect-ratio: 16 / 9;
  }

  .instagram__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}