/* ギャラリー・Lightbox */

.gallery-section {
  padding: 60px 0;
  background: #fff;
}

.gallery-section .section-title {
  text-align: center;
  font-size: 28px;
  font-weight: bold;
  color: #333;
  margin-bottom: 12px;
}

.gallery-section .section-subtitle {
  text-align: center;
  font-size: 16px;
  color: #666;
  margin-bottom: 40px;
}

/* ギャラリーグリッド */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.gallery-item {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  border-radius: 8px;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  background: #f5f5f5;
}

.gallery-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.gallery-item:hover img {
  transform: scale(1.05);
}

.gallery-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 12px;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
  color: white;
  font-size: 14px;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.gallery-item:hover .gallery-caption {
  opacity: 1;
}

/* Lightbox */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.lightbox.active {
  opacity: 1;
  pointer-events: all;
}

.lightbox img {
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
  border-radius: 4px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: white;
  border: none;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
  transition: transform 0.3s ease, background 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  color: #333;
  z-index: 10000;
}

.lightbox-close:hover {
  transform: rotate(90deg);
  background: #f0f0f0;
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: white;
  padding: 16px;
  cursor: pointer;
  font-size: 28px;
  line-height: 1;
  border-radius: 50%;
  transition: background 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  z-index: 10000;
}

.lightbox-nav:hover {
  background: rgba(255, 255, 255, 0.4);
}

.lightbox-prev {
  left: 20px;
}

.lightbox-next {
  right: 20px;
}

/* レスポンシブ */
@media (max-width: 768px) {
  .gallery-section {
    padding: 40px 0;
  }

  .gallery-section .section-title {
    font-size: 24px;
  }

  .gallery-section .section-subtitle {
    font-size: 14px;
  }

  .gallery-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 12px;
    padding: 0 12px;
  }

  .gallery-caption {
    font-size: 12px;
    padding: 8px;
  }

  .lightbox-close {
    width: 40px;
    height: 40px;
    font-size: 24px;
    top: 12px;
    right: 12px;
  }

  .lightbox-nav {
    padding: 12px;
    font-size: 24px;
    width: 48px;
    height: 48px;
  }

  .lightbox-prev {
    left: 12px;
  }

  .lightbox-next {
    right: 12px;
  }
}

@media (max-width: 480px) {
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}