/* ============================================================
   Content Viewer - 複数画像ビューワー
   B案: 単一/複数で枠は共通、複数時のみナビ・サムネイル付加
   ============================================================ */

/* ----- ヘッダ (タイトル + 補足情報) ----- */
/* 直下の画像ビューワーが中央寄せ表示になるため、それに合わせて見出しも中央寄せ。 */
.content-detail > header {
  text-align: center;
}

.content-detail > header .supplement {
  /* 中央寄せ時に左右余白を均等に取るため、ブロック自体も auto マージン化。 */
  margin-left: auto;
  margin-right: auto;
}

.content-viewer {
  margin: 24px 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 16px;
}

.content-viewer:focus-visible {
  outline: 2px solid var(--color-link-hover);
  outline-offset: 2px;
}

/* ----- ステージ (左ナビ + 画像 + 右ナビ) ----- */

.cv-stage {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
}

.content-viewer.is-single .cv-stage {
  grid-template-columns: 1fr;
}

.cv-image-frame {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 240px;
  overflow: hidden;
}

.cv-image {
  display: block;
  max-width: 100%;
  max-height: 80vh;
  width: auto;
  height: auto;
  object-fit: contain;
  user-select: none;
  -webkit-user-drag: none;
}

/* ----- 左右ナビボタン ----- */

.cv-nav {
  flex-shrink: 0;
  width: 44px;
  height: 64px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-bg);
  color: var(--color-text);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  transition: background-color 0.15s, color 0.15s, border-color 0.15s;
}

.cv-nav:hover:not(:disabled) {
  background: var(--color-link-hover);
  color: #ffffff;
  border-color: var(--color-link-hover);
}

.cv-nav:disabled {
  opacity: 0.3;
  cursor: default;
}

.cv-nav svg {
  width: 24px;
  height: 24px;
}

.cv-nav:focus-visible {
  outline: 2px solid var(--color-link-hover);
  outline-offset: 2px;
}

/* ----- 画面端タップゾーン (タッチデバイスでの発見性向上) ----- */

.cv-tap {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 30%;
  background: transparent;
  border: 0;
  padding: 0;
  margin: 0;
  cursor: pointer;
}

.cv-tap-prev { left: 0; }
.cv-tap-next { right: 0; }

/* マウスデバイスでは矢印ボタン側で操作させ、タップゾーンは無効化 (誤クリック防止) */
@media (hover: hover) and (pointer: fine) {
  .cv-tap {
    pointer-events: none;
  }
}

/* ----- 初回ヒント ----- */

.cv-hint {
  position: absolute;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.7);
  color: #ffffff;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 13px;
  pointer-events: none;
  transition: opacity 0.4s;
}

/* ----- ページインジケータ ----- */

.cv-indicator {
  margin-top: 12px;
  text-align: center;
  font-size: 14px;
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}

.cv-indicator-current {
  color: var(--color-text);
  font-weight: 600;
}

.cv-indicator-sep {
  margin: 0 6px;
}

/* ----- サムネイル一覧 ----- */

.cv-thumbs {
  list-style: none;
  margin: 12px 0 0;
  padding: 8px 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
}

.cv-thumbs li {
  flex-shrink: 0;
  scroll-snap-align: center;
}

.cv-thumb {
  display: block;
  width: 72px;
  height: 72px;
  border: 2px solid transparent;
  border-radius: 4px;
  background: var(--color-bg);
  padding: 0;
  cursor: pointer;
  overflow: hidden;
  transition: border-color 0.15s, transform 0.15s;
}

.cv-thumb:hover {
  border-color: var(--color-border);
}

.cv-thumb.is-active {
  border-color: var(--color-accent);
}

.cv-thumb:focus-visible {
  outline: 2px solid var(--color-link-hover);
  outline-offset: 2px;
}

.cv-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ----- モバイル ----- */

@media (max-width: 640px) {
  .content-viewer {
    margin: 16px -16px;
    border-radius: 0;
    border-left: none;
    border-right: none;
    padding: 12px 8px;
  }

  .cv-nav {
    width: 36px;
    height: 56px;
  }

  .cv-nav svg {
    width: 20px;
    height: 20px;
  }

  .cv-image {
    max-height: 70vh;
  }

  .cv-thumb {
    width: 56px;
    height: 56px;
  }
}

/* ----- アニメーション抑制 ----- */

@media (prefers-reduced-motion: reduce) {
  .cv-nav,
  .cv-thumb,
  .cv-hint {
    transition: none;
  }
}

/* ============================================================
   Content Meta - コメント / タグ / 日付のメタ情報カード
   ============================================================ */

.content-meta {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 1fr);
  gap: 24px 32px;
  margin: 24px 0;
  padding: 20px 24px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
}

.content-meta-side {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.content-meta-block {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.content-meta-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-heading);
  letter-spacing: 0.02em;
}

.content-meta-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--color-link-hover);
}

.content-meta-value {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
}

.content-meta-block--comment .content-meta-value {
  overflow-wrap: anywhere;
}

.content-meta-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.content-meta-tag {
  display: inline-block;
  padding: 3px 12px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-bg-soft);
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.6;
  text-decoration: none;
  transition: background-color 0.15s, color 0.15s, border-color 0.15s;
}
.content-meta-tag:hover {
  background: var(--color-text);
  color: #ffffff;
  border-color: var(--color-text);
}

.content-meta-date {
  font-size: 15px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--color-text);
}

/* コメントが無い場合は 1 カラムに */
.content-meta:not(:has(.content-meta-block--comment)) {
  grid-template-columns: minmax(0, 1fr);
}

@media (max-width: 720px) {
  .content-meta {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
    padding: 16px 18px;
  }
}