/* ============================================================
   フロアマップ グリッド＋ライトボックス（TASK-UX-PERF-POLISH-01 B-2）
   - デスクトップ/タブレット3列 → モバイル2列 → 極小幅1列
   - サムネイルをクリック（タップ）でアクセシブルなライトボックス拡大
   ============================================================ */

.c-floor-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
  align-items: start;
}

@media (max-width: 767px) {
  .c-floor-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
  }
}

@media (max-width: 359px) {
  .c-floor-grid {
    grid-template-columns: 1fr;
  }
}

.c-floor-grid__hint {
  font-size: 0.8125rem;
  color: var(--color-text-muted, #64748b);
  margin-block-end: 0.75rem;
}

.c-floor-grid__cell {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.c-floor-grid__title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-text, #1e293b);
  margin: 0;
  overflow-wrap: anywhere;
}

.c-floor-grid__zoom {
  position: relative;
  display: block;
  padding: 0;
  border: 1px solid var(--color-border, #e2e8f0);
  border-radius: var(--radius-md, 0.5rem);
  overflow: hidden;
  background: var(--color-white);
  cursor: zoom-in;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.c-floor-grid__zoom:hover,
.c-floor-grid__zoom:focus-visible {
  border-color: var(--color-primary, var(--color-info));
  box-shadow: 0 4px 14px rgb(15 23 42 / 0.14);
}

.c-floor-grid__img {
  display: block;
  width: 100%;
  height: auto;
}

.c-floor-grid__zoom-icon {
  position: absolute;
  inset-block-end: 8px;
  inset-inline-end: 8px;
  display: grid;
  place-items: center;
  inline-size: 32px;
  block-size: 32px;
  border-radius: 999px;
  background: rgb(15 23 42 / 0.62);
  color: var(--color-white);
  font-size: 20px;
  pointer-events: none;
}

.c-floor-grid__caption {
  font-size: 0.8125rem;
  color: var(--color-text-muted, #64748b);
  margin: 0;
}

.c-floor-grid__accordion {
  margin-block-start: 0.25rem;
}

/* ── ライトボックス（<dialog>） ── */
.c-lightbox {
  border: none;
  padding: 0;
  background: transparent;
  max-width: min(96vw, 1100px);
  max-height: 92dvh;
  width: auto;
}

.c-lightbox::backdrop {
  background: rgb(15 23 42 / 0.78);
}

.c-lightbox__body {
  overflow: auto;
  max-height: calc(92dvh - 3.5rem);
  border-radius: var(--radius-md, 0.5rem);
  background: var(--color-white);
  /* ピンチズームを妨げない */
  touch-action: pinch-zoom;
  -webkit-overflow-scrolling: touch;
}

.c-lightbox__img {
  display: block;
  width: 100%;
  height: auto;
}

.c-lightbox__close {
  position: absolute;
  inset-block-start: 8px;
  inset-inline-end: 8px;
  z-index: 1;
  display: grid;
  place-items: center;
  inline-size: 44px;
  block-size: 44px;
  border: none;
  border-radius: 999px;
  background: rgb(15 23 42 / 0.7);
  color: var(--color-white);
  cursor: pointer;
}

.c-lightbox__close:hover,
.c-lightbox__close:focus-visible {
  background: rgb(15 23 42 / 0.9);
}

.c-lightbox__caption {
  margin: 0.5rem 0 0;
  color: var(--color-white);
  font-size: 0.875rem;
  text-align: center;
  text-shadow: 0 1px 2px rgb(0 0 0 / 0.6);
}