/* ============================================================
   PERLA NERA — pages/galleria.css
   Masonry a colonne CSS + filtri + lightbox full screen.
   ============================================================ */

/* ---------- Filtri ---------- */
.gallery__filters {
  display: flex; flex-wrap: wrap; gap: 0.6rem;
  margin-bottom: 2.5rem;
}
.gallery__filter {
  padding: 0.55em 1.2em;
  border: 1px solid var(--linea); border-radius: var(--radius);
  font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--argento);
  transition: color var(--dur-fast), border-color var(--dur-fast);
}
.gallery__filter:hover { color: var(--perla); border-color: var(--argento); }
.gallery__filter[aria-pressed="true"] {
  background: var(--metallo); color: var(--nero); border-color: transparent;
}

/* ---------- Masonry: colonne CSS, nessuna libreria ---------- */
.gallery__grid {
  columns: 3 280px;
  column-gap: clamp(0.75rem, 1.5vw, 1.25rem);
}
.gallery__item {
  break-inside: avoid;
  margin-bottom: clamp(0.75rem, 1.5vw, 1.25rem);
  cursor: pointer;
}
/* In masonry l'immagine detta l'altezza della cella:
   niente position absolute del placeholder generico */
.gallery__item.ph::after { display: none; }
.gallery__item img {
  position: static;
  width: 100%; height: auto;
}
.gallery__item img {
  filter: grayscale(1);
  transition: filter var(--dur-med) var(--ease-out-expo),
              transform var(--dur-slow) var(--ease-out-expo);
}
.gallery__item:hover img { filter: grayscale(0.25); transform: scale(1.03); }

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 500;
  background: rgba(5, 5, 5, 0.96);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  padding: clamp(1rem, 4vw, 3rem);
  gap: 1rem;
}
.lightbox__stage {
  display: grid; justify-items: center; gap: 1rem;
  max-height: 100%;
}
.lightbox__stage img {
  max-height: 78vh;
  width: auto; max-width: 100%;
  object-fit: contain;
}
.lightbox__caption {
  font-size: 0.82rem; letter-spacing: 0.1em; color: var(--argento);
}
.lightbox__count {
  position: absolute; bottom: 1.4rem; left: 50%;
  transform: translateX(-50%);
  font-size: 0.72rem; letter-spacing: 0.22em; color: var(--grigio-muto);
  font-variant-numeric: tabular-nums;
}

.lightbox__close {
  position: absolute; top: 1.2rem; right: 1.4rem;
  font-size: 1.8rem; line-height: 1; color: var(--argento);
  width: 44px; height: 44px;
  transition: color var(--dur-fast);
}
.lightbox__close:hover { color: var(--perla); }

.lightbox__nav {
  width: 52px; height: 52px;
  display: grid; place-items: center;
  font-size: 1.8rem; color: var(--argento);
  border: 1px solid var(--linea); border-radius: 50%;
  transition: color var(--dur-fast), border-color var(--dur-fast);
}
.lightbox__nav:hover { color: var(--perla); border-color: var(--argento); }

@media (max-width: 720px) {
  .lightbox { grid-template-columns: 1fr; }
  .lightbox__nav { position: absolute; top: 50%; transform: translateY(-50%); }
  .lightbox__nav--prev { left: 0.8rem; }
  .lightbox__nav--next { right: 0.8rem; }
}