/* ==========================================================================
   GALERÍA — Cuadrícula de mosaico asimétrico con pestañas temáticas
   Depende de las variables definidas en styles.css (:root):
   --color-*, --radius-*, --shadow-*, --transition, --font-*, --container
   ========================================================================== */

.gallery-page {
  background: var(--color-surface);
}

.gallery-page .section-heading h1 {
  font-family: var(--font-display);
  color: var(--color-ink);
  line-height: 1.15;
}

/* --- Pestañas de filtro ------------------------------------------------- */

.gallery-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 2.5rem 0 2.5rem;
}

.gallery-filter {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-white);
  border: 1.5px solid var(--color-line);
  border-radius: 999px;
  padding: 0.65rem 1.4rem;
  cursor: pointer;
  transition: color var(--transition), background var(--transition), border-color var(--transition),
    box-shadow var(--transition), transform var(--transition);
}

.gallery-filter:hover {
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

.gallery-filter:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.gallery-filter.is-active {
  color: var(--color-white);
  background: var(--color-primary);
  border-color: var(--color-primary);
  box-shadow: 0 12px 30px rgba(7, 44, 67, 0.16);
}

/* --- Cuadrícula tipo mosaico --------------------------------------------- */

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 15rem;
  gap: 1.25rem;
}

.gallery-item {
  position: relative;
  grid-column: span 1;
  grid-row: span 1;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-ink);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

.gallery-item:hover,
.gallery-item:focus-within {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.gallery-item.item-wide {
  grid-column: span 2;
}

.gallery-item.item-tall {
  grid-row: span 2;
}

.gallery-item figure {
  margin: 0;
  width: 100%;
  height: 100%;
  position: relative;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 420ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.gallery-item:hover img,
.gallery-item:focus-within img {
  transform: scale(1.06);
}

/* Superposición con título + subtítulo, visible on hover/focus */

.gallery-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 0.3rem;
  padding: 1.25rem 1.4rem;
  color: var(--color-white);
  background: linear-gradient(180deg, rgba(7, 44, 67, 0) 40%, rgba(7, 44, 67, 0.85) 100%);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--transition), transform var(--transition);
}

.gallery-item:hover .gallery-overlay,
.gallery-item:focus-within .gallery-overlay {
  opacity: 1;
  transform: translateY(0);
}

.gallery-overlay h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.25;
}

.gallery-overlay p {
  margin: 0;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.85);
}

/* --- Ítems de video ------------------------------------------------------ */

.gallery-item-video .gallery-overlay {
  /* Deja espacio visual para el ícono de reproducción centrado */
  padding-bottom: 1.5rem;
}

.play-icon-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 3.75rem;
  height: 3.75rem;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(11, 59, 90, 0.55);
  backdrop-filter: blur(2px);
  color: var(--color-white);
  box-shadow: 0 10px 25px rgba(7, 44, 67, 0.35);
  transition: background var(--transition), transform var(--transition);
  pointer-events: none;
}

.gallery-item-video:hover .play-icon-overlay,
.gallery-item-video:focus-within .play-icon-overlay {
  background: var(--color-secondary-deep);
  transform: translate(-50%, -50%) scale(1.08);
}

.play-icon-overlay svg {
  width: 1.5rem;
  height: 1.5rem;
  margin-left: 3px; /* Optical centering: compensates the play-triangle shape */
}

.video-duration {
  position: absolute;
  top: 0.9rem;
  right: 0.9rem;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-white);
  background: rgba(7, 44, 67, 0.7);
  border-radius: 999px;
  padding: 0.25rem 0.65rem;
}

.gallery-empty {
  text-align: center;
  color: var(--color-muted);
  padding: 3rem 0;
}

/* --- Responsive ----------------------------------------------------------- */

@media (max-width: 1024px) {
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .gallery-item.item-wide {
    grid-column: span 2;
  }
}

@media (max-width: 640px) {
  .gallery-filters {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 0.5rem;
    -webkit-overflow-scrolling: touch;
  }

  .gallery-filter {
    flex: 0 0 auto;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: 16rem;
  }

  .gallery-item.item-wide,
  .gallery-item.item-tall {
    grid-column: span 1;
    grid-row: span 1;
  }
}

/* Respeta la preferencia de movimiento reducido del usuario */
@media (prefers-reduced-motion: reduce) {
  .gallery-item,
  .gallery-item img,
  .gallery-overlay,
  .play-icon-overlay {
    transition: none;
  }
}