/* =============================================================
   Casona San José — Gallery + Lightbox
   Grid asimétrico 12 columnas. Lightbox controlado por app.js.
   Referencia: Gallery.jsx del design system.
   ============================================================= */


/* -----------------------------------------------------------
   SECCIÓN
   ----------------------------------------------------------- */

.csn-gallery {
  padding-block: var(--section-padding-y);
}


/* -----------------------------------------------------------
   HEAD — eyebrow + título (col 5fr) + subtítulo (col 7fr)
   ----------------------------------------------------------- */

.csn-gallery__head {
  max-width: var(--container-max);
  margin-inline: auto;
  margin-block-end: 48px;
  padding-inline: var(--section-padding-x);
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 32px;
  align-items: end;
}

@media (max-width: 880px) {
  .csn-gallery__head {
    grid-template-columns: 1fr;
  }
}

.csn-gallery__head h2 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.75rem, 3vw, 2.75rem);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  margin-top: 16px;
}

.csn-gallery__sub {
  font-family: var(--font-body);
  font-size: var(--type-body-md);
  line-height: var(--leading-relaxed);
  color: var(--color-noche-suave);
  max-width: 52ch;
  margin: 0;
}


/* -----------------------------------------------------------
   GRID — 12 columnas irregulares (celdas a-h)
   ----------------------------------------------------------- */

.csn-gallery__grid {
  max-width: var(--container-wide);
  margin-inline: auto;
  padding-inline: var(--section-padding-x);
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: 120px;
  gap: 8px;
}

/* Celdas con span asimétrico — mismo patrón que Gallery.jsx */
.csn-gallery__cell.a { grid-column: span 7; grid-row: span 3; }
.csn-gallery__cell.b { grid-column: span 5; grid-row: span 2; }
.csn-gallery__cell.c { grid-column: span 5; grid-row: span 1; }
.csn-gallery__cell.d { grid-column: span 4; grid-row: span 2; }
.csn-gallery__cell.e { grid-column: span 4; grid-row: span 2; }
.csn-gallery__cell.f { grid-column: span 4; grid-row: span 2; }
.csn-gallery__cell.g { grid-column: span 6; grid-row: span 2; }
.csn-gallery__cell.h { grid-column: span 6; grid-row: span 2; }

/* 7 ítems: el séptimo cierra el grid a lo ancho en vez de dejar un hueco */
.csn-gallery__cell.g:last-child { grid-column: span 12; }

/* Mobile — reset spans heredados; grilla regular 2 columnas */
@media (max-width: 880px) {
  .csn-gallery__grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: auto;
    gap: 8px;
  }

  .csn-gallery__cell.a,
  .csn-gallery__cell.b,
  .csn-gallery__cell.c,
  .csn-gallery__cell.d,
  .csn-gallery__cell.e,
  .csn-gallery__cell.f,
  .csn-gallery__cell.g,
  .csn-gallery__cell.h {
    grid-column: span 1;
    grid-row: auto;
  }

  .csn-gallery__cell {
    aspect-ratio: 4 / 3;
  }
}

/* Celda base */
.csn-gallery__cell {
  background-size: cover;
  background-position: center;
  position: relative;
  cursor: zoom-in;
  overflow: hidden;
  filter: saturate(1.05);
}

.csn-gallery__cell::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--overlay-card);
  transition: opacity var(--duration-normal) var(--ease-out);
}

.csn-gallery__cell:hover::after,
.csn-gallery__cell:focus-visible::after {
  opacity: 0;
}

.csn-gallery__cell:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}


/* -----------------------------------------------------------
   LIGHTBOX — overlay oscuro, controlado por JS (aria-hidden)
   ----------------------------------------------------------- */

.csn-lightbox {
  position: fixed;
  inset: 0;
  z-index: 80;
  background: var(--overlay-lightbox);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 5vh 5vw;
  cursor: zoom-out;
  /* visible cuando aria-hidden="false" es gestionado por JS */
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.csn-lightbox[aria-hidden="false"] {
  opacity: 1;
  pointer-events: auto;
}

.csn-lightbox__img {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  cursor: default;
}

.csn-lightbox__close {
  position: absolute;
  top: 24px;
  right: 24px;
  background: none;
  border: 0;
  color: var(--color-blanco);
  cursor: pointer;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.8;
  transition: opacity var(--duration-fast) var(--ease-out);
}

.csn-lightbox__close:hover,
.csn-lightbox__close:focus-visible {
  opacity: 1;
}

.csn-lightbox__close:focus-visible {
  outline: 2px solid var(--color-blanco);
  outline-offset: 2px;
}


/* -----------------------------------------------------------
   PREFERS-REDUCED-MOTION
   ----------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  .csn-gallery__cell::after,
  .csn-lightbox,
  .csn-lightbox__close {
    transition: none;
  }
}