/* ============================================================
   Gallery page: page head, jump index, grouped grids, lightbox.
   Loads after sections.css and only adds; it overrides nothing.
   ============================================================ */


/* ------------------------------------------------------------
   Page head
   ------------------------------------------------------------ */

/* This page's header is condensed from the start (78px), so both the
   first section and the sticky index offset against that rather than
   the taller resting header height. */
html { scroll-padding-top: calc(78px + 4.5rem); }

.gal-head {
  background: var(--bg);
  padding-top: calc(78px + clamp(3rem, 7vw, 6rem));
  padding-bottom: clamp(2rem, 4vw, 3.5rem);
}

@media (max-width: 960px) {
  html { scroll-padding-top: calc(var(--header-h) + 4.5rem); }
  .gal-head { padding-top: calc(var(--header-h) + clamp(3rem, 7vw, 6rem)); }
}

/* The gallery is a symmetrical page: everything is centred on one
   axis, so the asymmetric grid of photographs below is the only thing
   doing the composing. */
.gal-head__inner {
  max-width: 52rem;
  margin-inline: auto;
  text-align: center;
}

.gal-head__title { font-size: var(--fs-h2); }

.gal-head__body {
  max-width: 48ch;
  margin-inline: auto;
  margin-top: clamp(1.25rem, 3vw, 1.75rem);
}
.gal-head__body p { color: var(--ink-soft); }

/* Short centred rule. The draw animation opens from the middle rather
   than the left, which is what the base --rule token does. */
.gal-head__body .rule {
  width: 64px;
  margin: 0 auto var(--sp-3);
  transform-origin: center;
}


/* ------------------------------------------------------------
   Jump index
   ------------------------------------------------------------ */

.gal-index {
  position: sticky;
  top: 78px;
  z-index: 40;
  background: var(--bg);
  border-block: 1px solid var(--line);
}

@media (max-width: 960px) {
  .gal-index { top: var(--header-h); }
}

.gal-index ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0 clamp(1.25rem, 3vw, 2.5rem);
  padding-block: 0.9rem;
}

.gal-index a {
  position: relative;
  display: inline-block;
  padding-block: 0.25rem;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
  transition: color var(--dur-fast) var(--ease-soft);
}
.gal-index a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--c-gold);
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform var(--dur-mid) var(--ease-out);
}
.gal-index a:hover,
.gal-index a:focus-visible { color: var(--ink); }
.gal-index a:hover::after,
.gal-index a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left center;
}

@media (max-width: 700px) {
  .gal-index {
    position: static;
    overflow-x: auto;
    scrollbar-width: thin;
  }
  .gal-index ul { flex-wrap: nowrap; }
  .gal-index a { white-space: nowrap; }
}


/* ------------------------------------------------------------
   Groups
   ------------------------------------------------------------ */

.gal-group { background: var(--bg); }
.gal-group--alt { background: var(--bg-alt); }

.gal-group__head {
  max-width: 52rem;
  margin-inline: auto;
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
  text-align: center;
}
.gal-group__title { font-size: var(--fs-h2); }
.gal-group__note {
  max-width: 46ch;
  margin-inline: auto;
  margin-top: var(--sp-2);
  color: var(--ink-soft);
}


/* ------------------------------------------------------------
   Grid

   Column masonry rather than a row grid. The photographs are a mix
   of portrait and landscape, and a fixed-ratio grid crops the
   verticals badly and leaves holes wherever the spans do not tile.
   Here every photograph keeps its own proportions and nothing is
   cut. Tiles are buttons: the whole photograph opens the viewer.
   ------------------------------------------------------------ */

.gal-grid {
  column-count: 3;
  column-gap: clamp(0.75rem, 1.5vw, 1.25rem);
}

.gal-item {
  break-inside: avoid;
  margin-bottom: clamp(0.75rem, 1.5vw, 1.25rem);
}

.gal-tile {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: var(--c-gray);
  overflow: hidden;
  cursor: zoom-in;
}

.gal-tile img {
  display: block;
  width: 100%;
  height: auto;
  transition: scale 700ms var(--ease-out);
}

/* Gold hairline frame draws in on hover */
.gal-tile::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid var(--c-gold);
  opacity: 0;
  transition: opacity var(--dur-mid) var(--ease-soft);
  pointer-events: none;
}

.gal-tile:hover img,
.gal-tile:focus-visible img { scale: 1.035; }
.gal-tile:hover::after,
.gal-tile:focus-visible::after { opacity: 1; }

.gal-tile:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 3px;
}

.gal-tile__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  padding: 0.45rem 0.8rem;
  background: rgba(36, 36, 38, 0.86);
  color: var(--ink-on-dark);
  font-family: var(--font-body);
  font-size: var(--fs-label);
  font-weight: 500;
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  pointer-events: none;
}

@media (max-width: 900px) {
  .gal-grid { column-count: 2; }
}


/* ------------------------------------------------------------
   Closing CTA aside
   ------------------------------------------------------------ */

.gal-cta__aside {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--sp-4);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--line-on-dark);
}
.gal-cta__note {
  max-width: 32ch;
  font-size: var(--fs-sm);
  color: var(--ink-on-dark-soft);
}


/* ------------------------------------------------------------
   Lightbox
   ------------------------------------------------------------ */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
}
.lightbox[hidden] { display: none; }

.lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(20, 20, 22, 0.94);
  cursor: zoom-out;
}

.lightbox__stage {
  position: relative;
  z-index: 1;
  width: min(100% - 2rem, 78rem);
  max-height: 100svh;
  padding: clamp(3.5rem, 8vh, 5rem) 0;
  display: grid;
  place-items: center;
}

.lightbox__figure {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  align-items: center;
  max-height: 100%;
}

.lightbox__img {
  max-width: 100%;
  max-height: calc(100svh - 12rem);
  width: auto;
  height: auto;
  object-fit: contain;
  background: var(--c-charcoal);
}

.lightbox__caption {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: center;
  gap: 0.4rem clamp(1rem, 3vw, 2rem);
  text-align: center;
}
.lightbox__group {
  font-size: var(--fs-label);
  font-weight: 500;
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--c-gold-rich);
}
.lightbox__text {
  max-width: 56ch;
  font-size: 0.95rem;
  color: var(--ink-on-dark-soft);
}
.lightbox__count {
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-wide);
  color: var(--ink-on-dark-mute);
}

/* Controls: square, hairline, no circles */
.lightbox__btn {
  position: absolute;
  z-index: 2;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-on-dark);
  background: rgba(36, 36, 38, 0.7);
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease-soft),
              background var(--dur-fast) var(--ease-soft);
}
.lightbox__btn:hover,
.lightbox__btn:focus-visible {
  border-color: var(--c-gold-rich);
  background: rgba(36, 36, 38, 0.95);
}
.lightbox__btn:focus-visible {
  outline: 2px solid var(--c-gold-rich);
  outline-offset: 3px;
}

.lightbox__btn--close { top: 1rem; right: 1rem; }
.lightbox__btn--prev  { left: 1rem;  top: 50%; translate: 0 -50%; }
.lightbox__btn--next  { right: 1rem; top: 50%; translate: 0 -50%; }

/* Chevrons and cross drawn from borders, so there are no icon files */
.lightbox__btn--prev span,
.lightbox__btn--next span {
  width: 11px;
  height: 11px;
  border-top: 1px solid var(--ink-on-dark);
  border-right: 1px solid var(--ink-on-dark);
}
.lightbox__btn--prev span { rotate: -135deg; translate: 2px 0; }
.lightbox__btn--next span { rotate: 45deg; translate: -2px 0; }

.lightbox__btn--close span {
  position: relative;
  width: 15px;
  height: 15px;
}
.lightbox__btn--close span::before,
.lightbox__btn--close span::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--ink-on-dark);
}
.lightbox__btn--close span::before { rotate: 45deg; }
.lightbox__btn--close span::after { rotate: -45deg; }

.js .lightbox__img { opacity: 0; transition: opacity var(--dur-mid) var(--ease-soft); }
.js .lightbox.is-ready .lightbox__img { opacity: 1; }

body.lightbox-open { overflow: hidden; }

@media (max-width: 700px) {
  .lightbox__btn { width: 44px; height: 44px; }
  .lightbox__btn--prev { left: 0.5rem; }
  .lightbox__btn--next { right: 0.5rem; }
  .lightbox__btn--close { top: 0.5rem; right: 0.5rem; }
  .lightbox__img { max-height: calc(100svh - 14rem); }
}

@media (prefers-reduced-motion: reduce) {
  .js .lightbox__img { opacity: 1; }
}