/* =========================================================
   Gallery Lightbox Slider — Stylesheet
   • GPU-accelerated transitions (transform / opacity only)
   • No layout thrash — overlay is position:fixed
   • ~3 KB minified
   ========================================================= */

:root {
  --gls-bg:        rgba(0, 0, 0, .92);
  --gls-ui:        rgba(255, 255, 255, .90);
  --gls-ui-hover:  #ffffff;
  --gls-radius:    4px;
  --gls-speed:     320ms;
  --gls-ease:      cubic-bezier(.4, 0, .2, 1);
}

/* ── Overlay ──────────────────────────────────────────── */
#gls-overlay {
  position: fixed;
  inset: 0;
  z-index: 99999;
  background: var(--gls-bg);
  display: flex;
  align-items: center;
  justify-content: center;

  opacity: 0;
  visibility: hidden;
  transition: opacity var(--gls-speed) var(--gls-ease),
              visibility var(--gls-speed) var(--gls-ease);
}

#gls-overlay.gls-open {
  opacity: 1;
  visibility: visible;
}

/* ── Stage (image + caption) ──────────────────────────── */
#gls-stage {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ── Image ────────────────────────────────────────────── */
#gls-img {
  display: block;
  max-width: 90vw;
  max-height: 80vh;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--gls-radius);
  box-shadow: 0 8px 40px rgba(0,0,0,.6);

  opacity: 0;
  transform: scale(.97);
  transition: opacity var(--gls-speed) var(--gls-ease),
              transform var(--gls-speed) var(--gls-ease);
  will-change: opacity, transform;
}

#gls-img.gls-visible {
  opacity: 1;
  transform: scale(1);
}

/* Slide-left / slide-right helpers */
#gls-img.gls-exit-left  { opacity: 0; transform: translateX(-3%) scale(.97); }
#gls-img.gls-exit-right { opacity: 0; transform: translateX( 3%) scale(.97); }
#gls-img.gls-enter-left  { transform: translateX( 3%) scale(.97); opacity: 0; }
#gls-img.gls-enter-right { transform: translateX(-3%) scale(.97); opacity: 0; }

/* ── Caption ──────────────────────────────────────────── */
#gls-caption {
  margin-top: 12px;
  color: var(--gls-ui);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: .875rem;
  line-height: 1.5;
  text-align: center;
  max-width: 80vw;
  min-height: 1.4em;
  opacity: .8;
  transition: opacity var(--gls-speed) var(--gls-ease);
}

/* ── Counter ──────────────────────────────────────────── */
#gls-counter {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--gls-ui);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: .8rem;
  opacity: .6;
  letter-spacing: .08em;
  pointer-events: none;
}

/* ── Buttons (close / prev / next) ───────────────────── */
.gls-btn {
  position: fixed;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--gls-ui);
  line-height: 1;
  padding: 10px;
  border-radius: 50%;
  transition: color .2s, background .2s, transform .15s;
  -webkit-tap-highlight-color: transparent;
}

.gls-btn:hover,
.gls-btn:focus-visible {
  color: var(--gls-ui-hover);
  background: rgba(255,255,255,.12);
  outline: none;
}

.gls-btn:active { transform: scale(.92); }

/* Close */
#gls-close {
  top: 14px;
  right: 16px;
}

/* Prev / Next */
#gls-prev,
#gls-next {
  top: 50%;
  transform: translateY(-50%);
}
#gls-prev { left: 12px; }
#gls-next { right: 12px; }
#gls-prev:active { transform: translateY(-50%) scale(.92); }
#gls-next:active { transform: translateY(-50%) scale(.92); }

/* Hide arrows when only 1 image */
#gls-overlay.gls-single #gls-prev,
#gls-overlay.gls-single #gls-next { display: none; }

/* ── SVG icons ────────────────────────────────────────── */
.gls-btn svg {
  display: block;
  width: 28px;
  height: 28px;
  pointer-events: none;
}

/* ── Loading spinner ──────────────────────────────────── */
#gls-spinner {
  position: absolute;
  width: 36px;
  height: 36px;
  border: 3px solid rgba(255,255,255,.2);
  border-top-color: rgba(255,255,255,.8);
  border-radius: 50%;
  animation: gls-spin .7s linear infinite;
  display: none;
}

#gls-overlay.gls-loading #gls-spinner { display: block; }
#gls-overlay.gls-loading #gls-img     { opacity: 0; }

@keyframes gls-spin {
  to { transform: rotate(360deg); }
}

/* ── Gallery thumbnails — add pointer cursor ─────────── */
.gallery-item a,
.wp-block-gallery .wp-block-image a,
.blocks-gallery-item a {
  cursor: zoom-in;
}

/* ── Reduced motion ───────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  #gls-img,
  #gls-overlay {
    transition-duration: 1ms !important;
  }
}

/* ── Mobile ───────────────────────────────────────────── */
@media (max-width: 600px) {
  #gls-prev { left: 4px; }
  #gls-next { right: 4px; }
  #gls-close { top: 10px; right: 10px; }
  .gls-btn svg { width: 24px; height: 24px; }
}