/* Ciras Instagram セクション
   モノクローム統一・基準色 #242422
   詳細仕様: docs/ciras-jp-instagram-feed-implementation-v2.md §3-2 */

.instagram-section {
  padding: 80px 0;
  background: #ffffff;
}

.instagram-section .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.instagram-header {
  text-align: center;
  margin-bottom: 40px;
}

.instagram-section .section-label {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: #666;
  margin: 0 0 8px;
  text-transform: uppercase;
}

.instagram-title {
  font-size: 2rem;
  font-weight: 700;
  color: #242422;
  letter-spacing: 0.05em;
  margin: 0 0 12px;
  line-height: 1.3;
}

.instagram-subtitle {
  font-size: 0.95rem;
  color: #242422;
  opacity: 0.7;
  margin: 0;
  line-height: 1.6;
}

.instagram-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  max-width: 900px;
  margin: 0 auto;
}

.instagram-tile {
  position: relative;
  display: block;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: #f5f5f5;
  text-decoration: none;
  color: inherit;
  border: 0;
}

.instagram-tile img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
  display: block;
}

.instagram-tile:hover img,
.instagram-tile:focus-visible img {
  transform: scale(1.05);
}

.instagram-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  background: rgba(36, 36, 34, 0.7);
  color: #ffffff;
  font-size: 0.95rem;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.instagram-tile:hover .instagram-overlay,
.instagram-tile:focus-visible .instagram-overlay {
  opacity: 1;
}

.instagram-stat {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  filter: grayscale(1);
}

.instagram-skeleton {
  aspect-ratio: 1 / 1;
  background: linear-gradient(90deg, #f0f0f0 0%, #e8e8e8 50%, #f0f0f0 100%);
  background-size: 200% 100%;
  animation: instagram-skeleton-loading 1.5s infinite;
}

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

.instagram-footer {
  text-align: center;
  margin-top: 32px;
}

.instagram-follow-link {
  display: inline-block;
  color: #242422;
  text-decoration: none;
  border-bottom: 1px solid #242422;
  padding: 4px 0;
  font-size: 0.95rem;
  transition: opacity 0.2s ease;
}

.instagram-follow-link:hover,
.instagram-follow-link:focus-visible {
  opacity: 0.6;
}

/* モバイル: 2列 */
@media (max-width: 640px) {
  .instagram-section {
    padding: 60px 0;
  }

  .instagram-section .container {
    padding: 0 16px;
  }

  .instagram-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .instagram-title {
    font-size: 1.6rem;
  }
}

/* タブレット: 3列維持・余白調整 */
@media (min-width: 641px) and (max-width: 1024px) {
  .instagram-section .container {
    padding: 0 24px;
  }
}

/* prefers-reduced-motion: アニメーション抑制 */
@media (prefers-reduced-motion: reduce) {
  .instagram-tile img {
    transition: none;
  }
  .instagram-tile:hover img,
  .instagram-tile:focus-visible img {
    transform: none;
  }
  .instagram-skeleton {
    animation: none;
  }
  .instagram-overlay {
    transition: none;
  }
}