/* =========================================================================
   Carpeta Estructural Semántica: gallery_
   Editorial bento mosaic + full-screen lightbox
   ========================================================================= */

.section_gallery {
  background: var(--c-canvas);
}

/* ─── Header ─── */
.gallery_eyebrow {
  font-family: var(--font-mono);
  font-size: 0.875rem;      /* 14px */
  letter-spacing: 0.2em;
  color: var(--c-celeste);
  text-transform: uppercase;
}

.gallery_heading {
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: 2.75rem;       /* 44px */
  line-height: 1.02;
  letter-spacing: 0.01em;
  color: var(--c-ghost);
  margin: 0.75rem 0 0;
  text-transform: uppercase;
}

.gallery_lead {
  font-family: var(--font-primary);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--c-ghost-grey);
  margin: 1rem 0 0;
  max-width: 46ch;
}

/* ─── Bento grid ─── */
.gallery_grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 14rem;          /* 224px */
  grid-auto-flow: row dense;
  gap: 0.75rem;
  margin-top: 2.75rem;
}

.gallery_tile.is-featured { grid-column: span 2; grid-row: span 2; }
.gallery_tile.is-wide     { grid-column: span 2; }

/* ─── Tile ─── */
.gallery_tile {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--c-hairline);
  border-radius: var(--r-container);
  background: var(--c-band-edge);
  cursor: pointer;
  padding: 0;
  display: block;
  /* entrance */
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}
.gallery_tile.is-in {
  opacity: 1;
  transform: translateY(0);
}

.gallery_tile-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transform: scale(1.001);   /* promote to its own layer */
  transition: transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: transform;
}

.gallery_tile-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(7, 8, 9, 0.72) 0%,
    rgba(7, 8, 9, 0.12) 34%,
    rgba(7, 8, 9, 0) 60%
  );
  opacity: 0.55;
  transition: opacity 0.5s ease;
}

/* Corner index — always faint, brightens on hover */
.gallery_tile-index {
  position: absolute;
  top: 0.85rem;
  left: 0.95rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--c-ghost);
  opacity: 0.55;
  transition: opacity 0.4s ease, color 0.4s ease;
}

.gallery_tile-caption {
  position: absolute;
  left: 0.95rem;
  bottom: 0.9rem;
  right: 0.95rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-ghost);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.45s ease, transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

/* Expand affordance — a small plus that hints "open" */
.gallery_tile-open {
  position: absolute;
  top: 0.7rem;
  right: 0.7rem;
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border: 1px solid rgba(216, 216, 211, 0.22);
  border-radius: var(--r-button);
  background: rgba(7, 8, 9, 0.45);
  color: var(--c-ghost);
  opacity: 0;
  transform: scale(0.85);
  transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}
.gallery_tile-open svg { width: 0.95rem; height: 0.95rem; stroke: currentColor; stroke-width: 1.6; fill: none; }

/* Hover / focus states */
.gallery_tile:hover .gallery_tile-img,
.gallery_tile:focus-visible .gallery_tile-img { transform: scale(1.065); }
.gallery_tile:hover .gallery_tile-shade { opacity: 0.9; }
.gallery_tile:hover .gallery_tile-index,
.gallery_tile:focus-visible .gallery_tile-index { opacity: 1; color: var(--c-celeste); }
.gallery_tile:hover .gallery_tile-caption,
.gallery_tile:focus-visible .gallery_tile-caption { opacity: 1; transform: translateY(0); }
.gallery_tile:hover .gallery_tile-open,
.gallery_tile:focus-visible .gallery_tile-open { opacity: 1; transform: scale(1); }
.gallery_tile:hover { box-shadow: inset 0 0 0 1px var(--c-celeste-ring); }

.gallery_tile:focus-visible {
  outline: 2px solid var(--c-celeste);
  outline-offset: 2px;
}

/* ─── Lightbox ─── */
.gallery_lb {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: flex;
  flex-direction: column;
  background: rgba(6, 7, 8, 0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  opacity: 0;
  transition: opacity 0.32s ease;
}
.gallery_lb.is-open { opacity: 1; }
.gallery_lb[hidden] { display: none; }

.gallery_lb-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.15rem 1.5rem;
  flex: none;
}

.gallery_lb-counter {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
  color: var(--c-ghost-grey);
}
.gallery_lb-counter b { color: var(--c-celeste); font-weight: 400; }

.gallery_lb-close {
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  border: 1px solid rgba(216, 216, 211, 0.18);
  border-radius: 50%;
  background: rgba(12, 13, 15, 0.7);
  color: var(--c-ghost);
  cursor: pointer;
  transition: border-color 0.3s ease, background 0.3s ease, transform 0.3s ease;
}
.gallery_lb-close svg { width: 1.125rem; height: 1.125rem; stroke: currentColor; stroke-width: 1.6; fill: none; }
.gallery_lb-close:hover { border-color: var(--c-celeste); background: var(--c-mid-dark); transform: rotate(90deg); }

/* Stage */
.gallery_lb-stage {
  position: relative;
  flex: 1;
  min-height: 0;
  display: grid;
  place-items: center;
  padding: 0 4.5rem;
}

.gallery_lb-figure {
  margin: 0;
  max-width: 100%;
  max-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
}

.gallery_lb-img {
  max-width: min(92vw, 1400px);
  max-height: 66vh;
  object-fit: contain;
  border: 1px solid var(--c-hairline);
  background: var(--c-band-edge);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.55);
  opacity: 1;
  transition: opacity 0.28s ease;
}
.gallery_lb-img.is-swapping { opacity: 0; }

.gallery_lb-caption {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-atlantic-sky);
  text-align: center;
}

.gallery_lb-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 3rem;
  height: 3rem;
  display: grid;
  place-items: center;
  border: 1px solid rgba(216, 216, 211, 0.18);
  border-radius: 50%;
  background: rgba(12, 13, 15, 0.68);
  color: var(--c-ghost);
  cursor: pointer;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.gallery_lb-nav:hover { border-color: var(--c-celeste); background: var(--c-mid-dark); }
.gallery_lb-nav svg { width: 1.35rem; height: 1.35rem; stroke: currentColor; stroke-width: 1.5; fill: none; }
.gallery_lb-nav.is-prev { left: 1rem; }
.gallery_lb-nav.is-next { right: 1rem; }

/* Thumbnail rail */
.gallery_lb-rail {
  flex: none;
  display: flex;
  gap: 0.6rem;
  justify-content: center;
  align-items: center;
  padding: 1.1rem 1.5rem 1.6rem;
  overflow-x: auto;
  scrollbar-width: none;
}
.gallery_lb-rail::-webkit-scrollbar { display: none; }

.gallery_lb-thumb {
  flex: none;
  width: 5.25rem;
  height: 3.25rem;
  border: 1px solid var(--c-hairline);
  border-radius: var(--r-container);
  background-size: cover;
  background-position: center;
  cursor: pointer;
  opacity: 0.42;
  padding: 0;
  transition: opacity 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}
.gallery_lb-thumb:hover { opacity: 0.8; }
.gallery_lb-thumb.is-active {
  opacity: 1;
  border-color: var(--c-celeste);
  transform: translateY(-2px);
}

/* ─── Responsive ─── */
@media (max-width: 900px) {
  .gallery_heading { font-size: clamp(1.75rem, 6vw, 2.75rem); }
  .gallery_grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 11rem;
    gap: 0.6rem;
  }
  /* Featured stays a 2-wide anchor; wides collapse to single column */
  .gallery_tile.is-featured { grid-column: span 2; grid-row: span 2; }
  .gallery_tile.is-wide     { grid-column: span 2; grid-row: span 1; }
  .gallery_lb-stage { padding: 0 0.75rem; }
  .gallery_lb-nav { width: 2.5rem; height: 2.5rem; }
  .gallery_lb-img { max-height: 60vh; }
}

@media (max-width: 560px) {
  .gallery_grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 8.5rem;
  }
  .gallery_tile-caption { font-size: 0.6875rem; }
  .gallery_lb-thumb { width: 4rem; height: 2.5rem; }
  .gallery_lb-topbar { padding: 0.9rem 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  .gallery_tile { opacity: 1; transform: none; transition: none; }
  .gallery_tile-img,
  .gallery_lb,
  .gallery_lb-img { transition: none; }
}