/* ===================================
   ギャラリーページ専用スタイル
   =================================== */

.gallery-section {
  padding: 2rem 0 6rem;
}

/* ===================================
   カテゴリフィルター
   =================================== */
.filter-bar {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin: 1.5rem 0 3rem;
}

.filter-btn {
  padding: 0.5rem 1.4rem;
  border: 1.5px solid var(--ai-pale);
  border-radius: 2rem;
  background: transparent;
  color: var(--ai);
  font-family: inherit;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.filter-btn:hover {
  border-color: var(--ai);
  background: var(--ai-pale);
}

.filter-btn.active {
  background: var(--ai);
  border-color: var(--ai);
  color: var(--white);
}

/* ===================================
   作品グリッド
   =================================== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 2rem;
  min-height: 200px;
}

/* ===================================
   作品カード
   =================================== */
.gallery-card {
  background: var(--white);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: box-shadow var(--transition), transform var(--transition), opacity 0.4s ease;
  outline: none;
}

.gallery-card:focus-visible {
  outline: 2px solid var(--ai);
  outline-offset: 3px;
}

.gallery-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-6px);
}

.gallery-card.hidden {
  display: none;
}

.card-img-wrap {
  position: relative;
  aspect-ratio: 1 / 1;
  overflow: hidden;
}

.card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.gallery-card:hover .card-img-wrap img {
  transform: scale(1.07);
}

.card-overlay {
  position: absolute;
  inset: 0;
  background: rgba(26, 58, 92, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
}

.gallery-card:hover .card-overlay,
.gallery-card:focus-visible .card-overlay {
  opacity: 1;
}

.card-overlay-text {
  color: var(--white);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  border: 1px solid rgba(255,255,255,0.6);
  padding: 0.5rem 1.2rem;
  border-radius: 2px;
}

/* 作品番号バッジ */
.card-number {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: rgba(255,255,255,0.9);
  color: var(--ai);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  padding: 0.2rem 0.5rem;
  border-radius: 2px;
  font-weight: 700;
}

.card-info {
  padding: 1.2rem 1.2rem 1.4rem;
}

.card-cat {
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--akane);
  display: block;
  margin-bottom: 0.35rem;
}

.card-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ai);
  margin-bottom: 0.35rem;
  line-height: 1.4;
}

.card-sub {
  font-size: 0.76rem;
  color: var(--text-sub);
  line-height: 1.6;
}

/* ===================================
   件数表示
   =================================== */
.gallery-count {
  text-align: right;
  font-size: 0.78rem;
  color: var(--text-sub);
  letter-spacing: 0.05em;
  margin-top: 2rem;
}

/* ===================================
   レスポンシブ
   =================================== */
@media (max-width: 600px) {
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .filter-bar {
    gap: 0.4rem;
  }

  .filter-btn {
    font-size: 0.76rem;
    padding: 0.4rem 1rem;
  }
}

@media (max-width: 380px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }
}