/* ============================================================
   PAGE GALERIE PHOTOS — Styles Spécifiques (`photos.css`)
   
   SECTIONS :
   - FILTRES DE GALERIE : Boutons de filtrage par catégorie (Tous, Live, Promo, Backstage).
   - MASONRY GRID : Disposition en colonnes fluides (CSS columns).
   - LIGHTBOX : Visionneuse modale plein écran avec arrière-plan sombre flouté.
   ============================================================ */

/* ========== BOUTONS DE FILTRAGE DE CATÉGORIE ========== */
.photo-filters {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* ========== MASONRY GRID ========== */
.photo-masonry {
  columns: 3;
  column-gap: 0.5rem;
}
.pm-item {
  break-inside: avoid;
  margin-bottom: 0.5rem;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  background: var(--gray-mid);
  outline: none;
}
.pm-item.tall img { height: 500px; }
.pm-item img {
  width: 100%;
  display: block;
  transition: transform 0.5s ease;
  object-fit: cover;
}
.pm-item:hover img, .pm-item:focus img { transform: scale(1.04); }
.pm-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
  gap: 0.5rem;
}
.pm-item:hover .pm-overlay, .pm-item:focus .pm-overlay { opacity: 1; }
.pm-zoom {
  font-size: 2rem;
  color: var(--cyan);
  text-shadow: 0 0 10px var(--cyan);
  line-height: 1;
}
.pm-label {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--white);
}
.pm-item.hidden { display: none; }

/* ========== LIGHTBOX ========== */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: none;
  align-items: center;
  justify-content: center;
}
.lightbox.open { display: flex; }
.lb-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.93);
  backdrop-filter: blur(8px);
}
.lb-content {
  position: relative;
  z-index: 1;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}
.lb-content img {
  max-width: 90vw;
  max-height: 82vh;
  object-fit: contain;
  border: 1px solid var(--gray-border);
  box-shadow: 0 0 60px rgba(0,229,255,0.15);
}
.lb-caption {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
}
.lb-close {
  position: fixed;
  top: 1.5rem; right: 1.5rem;
  font-size: 1.5rem;
  color: var(--white);
  background: transparent;
  border: 1px solid var(--gray-border);
  width: 44px; height: 44px;
  cursor: pointer;
  z-index: 2;
  transition: all var(--transition);
  display: flex; align-items: center; justify-content: center;
}
.lb-close:hover { color: var(--cyan); border-color: var(--cyan); }
.lb-prev, .lb-next {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  font-size: 2rem;
  color: var(--white);
  background: rgba(0,0,0,0.5);
  border: 1px solid var(--gray-border);
  width: 50px; height: 50px;
  cursor: pointer;
  z-index: 2;
  transition: all var(--transition);
  display: flex; align-items: center; justify-content: center;
}
.lb-prev { left: 1rem; }
.lb-next { right: 1rem; }
.lb-prev:hover, .lb-next:hover { color: var(--cyan); border-color: var(--cyan); }

/* ========== RESPONSIVE ========== */
@media (max-width: 900px) {
  .photo-masonry { columns: 2; }
}
@media (max-width: 500px) {
  .photo-filters { justify-content: center; gap: 0.4rem; }
  .filter-btn { padding: 0.45rem 0.8rem; letter-spacing: 2px; }
  .photo-masonry { columns: 1; }
  .pm-item.tall img { height: auto; }
}