/* ============================================
   フォトギャラリーページ スタイル
   ============================================ */

/* --- Gallery Section --- */
.gallery-section {
  background-color: var(--color-white);
}

/* --- Grid --- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

/* --- Item --- */
.gallery-item {
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  position: relative;
}

.gallery-item::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0);
  transition: background 0.3s;
}

.gallery-item:hover::after {
  background: rgba(0, 0, 0, 0.15);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.gallery-item:hover img {
  transform: scale(1.06);
}

/* --- Lightbox --- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

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

.lightbox-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.95);
}

.lightbox-content {
  position: relative;
  width: 100vw;
  height: 100vh;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.95);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.lightbox.is-active .lightbox-content {
  transform: scale(1);
}

.lightbox-content img {
  max-width: 96vw;
  max-height: 96vh;
  display: block;
  border-radius: 0;
  object-fit: contain;
}

.lightbox-close {
  position: fixed;
  top: 20px;
  right: 20px;
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.15);
  border: none;
  border-radius: 50%;
  font-size: 1.75rem;
  line-height: 1;
  color: var(--color-white);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  backdrop-filter: blur(8px);
  transition: transform 0.2s, background 0.2s;
}

.lightbox-close:hover {
  transform: scale(1.1);
  background: rgba(255, 255, 255, 0.3);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
  }
}

@media (max-width: 768px) {
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .gallery-item {
    border-radius: 6px;
  }

  .lightbox-close {
    top: 12px;
    right: 12px;
    width: 40px;
    height: 40px;
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .gallery-grid {
    gap: 6px;
  }

  .gallery-item {
    border-radius: 4px;
  }
}