/* ============================================================
   fotos.css — galería de fotografía
   Cuadrícula tipo masonry, filtros por categoría y lightbox.
   ============================================================ */

/* ---------- Filtros ---------- */
.filtros {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 2.5rem;
}

.filtro {
  background: transparent;
  border: 1px solid #333;
  color: var(--muted);
  font-family: inherit;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  padding: 0.45rem 1rem;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.25s ease;
}

.filtro:hover {
  border-color: var(--accent);
  color: #fff;
}

.filtro.activo {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 700;
}

/* ---------- Cuadrícula masonry ---------- */
.masonry {
  column-count: 3;
  column-gap: 1rem;
  margin-top: 2rem;
  width: 100%;
  max-width: 1200px;
}

.foto-item {
  display: block;
  width: 100%;
  position: relative;
  margin: 0 0 1rem;
  padding: 0;
  border: none;
  background: var(--surface);
  border-radius: 10px;
  overflow: hidden;
  cursor: zoom-in;
  break-inside: avoid;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.foto-item.oculto {
  display: none;
}

.foto-item img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.5s ease, filter 0.4s ease;
}

.foto-item:hover img {
  transform: scale(1.04);
}

.foto-item::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 45%, rgba(0, 0, 0, 0.85));
  opacity: 0;
  transition: opacity 0.35s ease;
}

.foto-item:hover::after,
.foto-item:focus-visible::after {
  opacity: 1;
}

.foto-item figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: 0.9rem 1rem;
  text-align: left;
  color: #fff;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.foto-item:hover figcaption,
.foto-item:focus-visible figcaption {
  opacity: 1;
  transform: translateY(0);
}

.foto-item figcaption strong {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 0.15rem;
}

.foto-item figcaption span {
  font-size: 0.78rem;
  color: #ddd;
}

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(8, 8, 8, 0.96);
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 2.5rem 4rem;
}

.lightbox.abierto {
  display: flex;
}

.lightbox img {
  max-width: 100%;
  max-height: 78vh;
  border-radius: 8px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
}

.lightbox figcaption {
  margin-top: 1rem;
  color: var(--muted);
  font-size: 0.92rem;
  text-align: center;
  max-width: 700px;
}

.lightbox figcaption strong {
  color: #fff;
  display: block;
  margin-bottom: 0.2rem;
}

.lb-cerrar,
.lb-prev,
.lb-next {
  position: absolute;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #fff;
  font-family: inherit;
  font-size: 1.4rem;
  line-height: 1;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.25s ease;
}

.lb-cerrar:hover,
.lb-prev:hover,
.lb-next:hover {
  background: var(--accent);
  border-color: var(--accent);
}

.lb-cerrar {
  top: 1.5rem;
  right: 1.5rem;
  font-size: 1.1rem;
}

.lb-prev {
  left: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
}

.lb-next {
  right: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
}

.lb-contador {
  position: absolute;
  top: 1.9rem;
  left: 1.5rem;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--faint);
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .masonry {
    column-count: 2;
  }
}

@media (max-width: 560px) {
  .masonry {
    column-count: 1;
  }
  .lightbox {
    padding: 3.5rem 1rem 2rem;
  }
  .lb-prev,
  .lb-next {
    width: 38px;
    height: 38px;
    font-size: 1.1rem;
  }
  .lb-prev { left: 0.4rem; }
  .lb-next { right: 0.4rem; }
}

@media (prefers-reduced-motion: reduce) {
  .foto-item img,
  .foto-item::after,
  .foto-item figcaption {
    transition: none;
  }
}