/* ==========================================================================
   gallery.css  |  portrait coverflow slideshow and lightbox
   The slideshow follows the reference invitation: portrait 3:4 cards on a
   shared stage. The centre card faces forward; neighbours turn away and
   shrink; photos further out fade. Cards move with a 1.1 s ease.
   ========================================================================== */

.gallery { padding-block: var(--section-pad); overflow-x: clip; }
.gallery__head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--space-4);
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}
.gallery__head h2 { font-size: var(--step-4); line-height: 0.9; }
.gallery__head p { max-width: 30ch; font-size: var(--step-0); color: var(--text); }

.slideshow { display: grid; justify-items: center; gap: var(--space-3); }

.coverflow {
  --cf-h: clamp(23rem, 70vw, 35rem);
  position: relative;
  width: 100%;
  height: var(--cf-h);
  perspective: 2400px;
  touch-action: pan-y;
}
.coverflow__track {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transform-style: preserve-3d;
  pointer-events: none;            /* its flat plane would sit in front of cards pushed back in 3D */
}
.card {
  position: absolute;
  height: 92%;
  aspect-ratio: 3 / 4;
  padding: clamp(0.4rem, 1.2vw, 0.65rem);          /* the pearl mount of a printed photograph */
  border: 0;
  border-radius: 0;
  overflow: hidden;
  background: var(--pearl);
  cursor: pointer;
  transition:
    transform 1100ms cubic-bezier(0.4, 0, 0.2, 1),
    opacity 1100ms cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform, opacity;
  -webkit-tap-highlight-color: transparent;
}
.card:focus-visible { outline: 3px solid var(--zari-hi); outline-offset: 4px; border-radius: 0; }
.coverflow.no-anim .card { transition: none; }
.card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  opacity: 0;
  transition: opacity 0.6s ease;
  user-select: none;
  -webkit-user-drag: none;
}
.card__img.is-loaded { opacity: 1; }

.coverflow__nav {
  position: absolute;
  top: 50%;
  translate: 0 -50%;
  z-index: 200;
  display: none;
  place-items: center;
  width: 3rem;
  height: 3rem;
  padding: 0;
  border: 0;
  border-radius: var(--radius-full);
  background: var(--pearl);
  color: var(--wine);
  cursor: pointer;
  transition: background 0.3s var(--ease-soft), transform 0.2s var(--ease-expo);
}
.coverflow__nav:hover { background: var(--zari-hi); }
.coverflow__nav:active { transform: scale(0.94); }
.coverflow__nav:focus-visible { border-radius: var(--radius-full); outline: 3px solid var(--zari-hi); }
.coverflow__nav svg { width: 1.1rem; height: 1.1rem; }
.coverflow__nav--prev { left: 0; }
.coverflow__nav--next { right: 0; }
@media (min-width: 48rem) { .coverflow__nav { display: grid; } }

.slideshow__meta { display: flex; align-items: center; gap: var(--space-3); }
.slideshow__count {
  font-size: var(--step-0);
  font-variant-numeric: tabular-nums;
  color: var(--text);
}

.round {
  width: 3.25rem;
  height: 3.25rem;
  display: grid;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: var(--radius-full);
  background: color-mix(in srgb, var(--text) 16%, transparent);
  color: var(--text);
  cursor: pointer;
  transition: background 0.35s var(--ease-soft), color 0.35s var(--ease-soft), transform 0.2s var(--ease-expo);
}
.round--sm { width: 2.75rem; height: 2.75rem; }
.round:hover { background: var(--accent); color: var(--on-accent); }
.round:active { transform: scale(0.94); }
.round:focus-visible { border-radius: var(--radius-full); }
.round svg { width: 1.1rem; height: 1.1rem; }
.slideshow__play [data-icon="pause"] { display: none; }
.slideshow__play[data-state="playing"] [data-icon="pause"] { display: block; }
.slideshow__play[data-state="playing"] [data-icon="play"] { display: none; }

/* time left on the current photo; its animationend moves to the next one */
.slideshow__progress {
  width: min(10rem, 40%);
  height: 4px;
  background: color-mix(in srgb, var(--text) 22%, transparent);
  overflow: hidden;
}
.slideshow__progress span {
  display: block;
  height: 100%;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
}
.slideshow.is-playing .slideshow__progress span {
  animation: gal-progress var(--gallery-interval, 5200ms) linear forwards;
}
.slideshow.is-playing.is-paused .slideshow__progress span { animation-play-state: paused; }

/* Lightbox: always dark so photos sit on a neutral ground ------------------ */
.lb {
  position: fixed;
  inset: 0;
  z-index: var(--z-lightbox);
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  background: #12060a;
  color: #f4e3cb;
}
.lb[hidden] { display: none; }
.lb__backdrop {
  position: absolute;
  inset: -10%;
  background-size: cover;
  background-position: center;
  filter: blur(46px) saturate(1.2);
  opacity: 0.3;
  pointer-events: none;
}
.lb__top {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem clamp(0.75rem, 3vw, 1.5rem);
}
.lb__count { font-variant-numeric: tabular-nums; color: #e6c888; }
.lb__tools { display: flex; gap: 0.6rem; }
.lb__btn {
  width: 3rem;
  height: 3rem;
  display: grid;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: var(--radius-full);
  background: rgb(244 227 203 / 0.14);
  color: #f4e3cb;
  cursor: pointer;
  transition: background 0.3s, transform 0.2s var(--ease-expo);
}
.lb__btn:hover { background: rgb(244 227 203 / 0.26); }
.lb__btn:active { transform: scale(0.94); }
.lb__btn:focus-visible { outline: 2px solid #e6c888; border-radius: var(--radius-full); }
.lb__btn svg { width: 1.3rem; height: 1.3rem; }

.lb__stage {
  position: relative;
  min-height: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
  touch-action: none;
  margin-inline: clamp(0.5rem, 3vw, 5rem);
}
.lb__img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  user-select: none;
  -webkit-user-drag: none;
  cursor: zoom-in;
  will-change: transform;
}
.lb__nav { position: absolute; top: 50%; translate: 0 -50%; z-index: 2; }
.lb__nav--prev { left: 0.25rem; }
.lb__nav--next { right: 0.25rem; }

.lb__thumbs {
  position: relative;
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding: 0.75rem clamp(0.75rem, 3vw, 1.5rem) 1rem;
  scrollbar-width: none;
}
.lb__thumbs > :first-child { margin-inline-start: auto; }
.lb__thumbs > :last-child { margin-inline-end: auto; }
.lb__thumb {
  flex: 0 0 3.4rem;
  aspect-ratio: 4 / 5;
  padding: 0;
  overflow: hidden;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  background: rgb(244 227 203 / 0.08);
  opacity: 0.5;
  cursor: pointer;
}
.lb__thumb img { width: 100%; height: 100%; object-fit: cover; }
.lb__thumb[aria-current="true"] { opacity: 1; border-color: #e6c888; }
.lb__thumb:focus-visible { outline: 2px solid #e6c888; border-radius: var(--radius-sm); }

/* the photo grows out of the slideshow and back (View Transitions) --------- */
::view-transition-group(gal-photo) {
  animation-duration: 800ms;
  animation-timing-function: cubic-bezier(0.16, 1, 0.3, 1);
}
::view-transition-old(gal-photo),
::view-transition-new(gal-photo) { height: 100%; object-fit: cover; }
::view-transition-old(root), ::view-transition-new(root) { animation-duration: 350ms; }
.has-cursor .card { cursor: none; }