/* ============================================================
   BTT 2026 — SECCIÓN 09: GALERÍA MULTIMEDIA + LIGHTBOX
   ============================================================ */

.galeria-filtros {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .6rem;
  margin-bottom: 2.2rem;
}
.galeria-filtro {
  background: var(--marfil);
  border: 1px solid var(--dorado-linea);
  color: var(--bordo);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .05em;
  padding: .55rem 1.2rem;
  border-radius: 999px;
  transition: all var(--transicion);
}
.galeria-filtro:hover { border-color: var(--bordo); }
.galeria-filtro.activo { background: var(--bordo); color: var(--marfil); border-color: var(--bordo); }

.galeria-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.galeria-item {
  position: relative;
  border-radius: var(--radio);
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 4/3;
  border: 1px solid var(--linea);
}
.galeria-item img, .galeria-item video {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.galeria-item:hover img, .galeria-item:focus-visible img { transform: scale(1.06); }
.galeria-item figcaption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 1.6rem .9rem .7rem;
  font-size: .78rem;
  color: var(--marfil);
  background: linear-gradient(to top, rgba(22,15,17,.85), transparent);
  opacity: 0;
  transition: opacity var(--transicion);
}
.galeria-item:hover figcaption, .galeria-item:focus-visible figcaption { opacity: 1; }

.galeria-vacia {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--gris);
  padding: 2.5rem 1rem;
  border: 1px dashed var(--dorado-linea);
  border-radius: var(--radio);
}
.galeria-aviso { text-align: center; color: var(--gris); font-size: .86rem; margin-top: 2rem; }

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed; inset: 0;
  z-index: 2000;
  background: rgba(22, 15, 17, .94);
  display: flex;
  align-items: center;
  justify-content: center;
}
.lightbox[hidden] { display: none; }
.lightbox-figura { max-width: min(92vw, 1000px); text-align: center; }
.lightbox-media img, .lightbox-media video {
  max-width: 100%;
  max-height: 78vh;
  border-radius: var(--radio);
  margin: 0 auto;
}
.lightbox-figura figcaption {
  color: var(--dorado-claro);
  font-size: .88rem;
  margin-top: 1rem;
}
.lightbox-cerrar {
  position: absolute;
  top: 1.2rem; right: 1.4rem;
  background: none;
  border: none;
  color: var(--marfil);
  font-size: 2.6rem;
  line-height: 1;
}
.lightbox-cerrar:hover { color: var(--dorado); }
.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 250, 245, .08);
  border: 1px solid var(--dorado-linea);
  color: var(--marfil);
  width: 52px; height: 52px;
  border-radius: 50%;
  font-size: 1.3rem;
  transition: background var(--transicion);
}
.lightbox-nav:hover { background: var(--dorado); color: var(--bordo-oscuro); }
.lightbox-prev { left: 1.2rem; }
.lightbox-next { right: 1.2rem; }

@media (max-width: 900px) { .galeria-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 600px) { .galeria-grid { grid-template-columns: repeat(2, 1fr); } }