/* ─────────────────────────────────────────────────────────────────
   gallery.css — Styles for gallery.html
   §1 Page hero   §2 Filter tabs   §3 Gallery grid + swap items
   §4 Comparison slider   §5 Gallery CTA
   ───────────────────────────────────────────────────────────────── */


/* ═══════════════════════════════════════════════════════════════════
   §1 PAGE HERO — Compact header (not full-viewport)
   ═════════════════════════════════════════════════════════════════ */

.gallery-hero {
  min-height: 44dvh;
  display: flex;
  align-items: flex-end;
  padding-block: calc(72px + var(--s8)) var(--s10);
  padding-inline: var(--gutter);
  background: var(--bg);
  position: relative;
  overflow: hidden;
}

.gallery-hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--max-w);
  margin-inline: auto;
  width: 100%;
}

/* Huge background text for depth */
.gallery-hero-bg {
  position: absolute;
  inset-block-end: -0.15em;
  inset-inline-end: 0;
  font-family: var(--ff-serif);
  font-size: clamp(6rem, 20vw, 16rem);
  font-weight: 400;
  color: var(--line);
  line-height: 1;
  letter-spacing: -0.03em;
  user-select: none;
  pointer-events: none;
  z-index: 0;
}

.gallery-hero-label {
  margin-block-end: var(--s2);
}

.gallery-hero-title {
  margin-block-end: var(--s3);
}

.gallery-hero-sub {
  font-family: var(--ff-serif);
  font-size: clamp(1rem, 1.6vw, 1.3rem);
  font-style: italic;
  color: var(--mocha);
  max-width: 44ch;
  line-height: 1.55;
}


/* ═══════════════════════════════════════════════════════════════════
   §2 FILTER TABS
   ═════════════════════════════════════════════════════════════════ */

.gallery-filter-bar {
  position: sticky;
  top: 72px;            /* below the site header */
  z-index: var(--z-sticky);
  background: var(--surface);
  border-block-end: 1px solid var(--line);
  padding-block: var(--s3);
  backdrop-filter: blur(12px);
}

.gf-tabs {
  display: flex;
  gap: var(--s2);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding-inline: var(--gutter);
}

.gf-tabs::-webkit-scrollbar { display: none; }

.gf-tab {
  flex-shrink: 0;
  border: 1px solid var(--line);
  background: transparent;
  padding: var(--s1) var(--s4);
  border-radius: 100px;
  font-family: var(--ff-sans);
  font-size: var(--f-label);
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--dur-ui) var(--ease),
              color var(--dur-ui) var(--ease),
              border-color var(--dur-ui) var(--ease);
}

.gf-tab.is-active {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}

@media (hover: hover) and (pointer: fine) {
  .gf-tab:not(.is-active):hover {
    border-color: var(--ink-soft);
    color: var(--ink);
  }
}


/* ═══════════════════════════════════════════════════════════════════
   §3 GALLERY GRID + SWAP ITEMS
   ═════════════════════════════════════════════════════════════════ */

.gallery-grid-sec {
  padding-block: var(--s10) var(--s18);
  background: var(--bg);
  min-height: 60dvh;
}

.gallery-masonry {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s3);
  margin-block-start: var(--s8);
}

.gallery-item {
  position: relative;   /* contain the absolutely positioned tag */
  will-change: opacity, transform;
}

.gallery-item.is-hidden {
  display: none;
}

/* The swap card fills the grid cell */
.gallery-item .img-swap {
  aspect-ratio: 4 / 5;
  border-radius: 4px;
}

/* Service tag badge */
.gallery-item-tag {
  position: absolute;
  inset-block-start: var(--s2);
  inset-inline-start: var(--s2);
  z-index: 3;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(4px);
  color: var(--ink);
  font-size: var(--f-label);
  letter-spacing: 0.06em;
  padding: 2px 8px;
  border-radius: 100px;
  pointer-events: none;
}

@media (max-width: 768px) {
  .gallery-masonry {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--s2);
  }
}

@media (max-width: 480px) {
  .gallery-masonry {
    grid-template-columns: 1fr;
  }
}


/* ── Swap component (duplicated from service-page.css for isolation) ── */

.img-swap {
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.img-swap-base,
.img-swap-hover {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transition: opacity 0.45s var(--ease);
}

.img-swap-hover {
  opacity: 0;
}

@media (hover: hover) and (pointer: fine) {
  .img-swap:hover .img-swap-hover { opacity: 1; }
}

.img-swap.is-flipped .img-swap-hover { opacity: 1; }

.img-swap-tag {
  position: absolute;
  bottom: var(--s2);
  inset-inline-start: var(--s2);
  z-index: 2;
  background: rgba(22, 18, 16, 0.55);
  backdrop-filter: blur(6px);
  color: #EFE7DB;
  font-size: var(--f-label);
  letter-spacing: 0.08em;
  padding: 3px 10px;
  border-radius: 100px;
  pointer-events: none;
  transition: opacity 0.3s var(--ease);
}

@media (hover: hover) and (pointer: fine) {
  .img-swap:hover .img-swap-base .img-swap-tag  { opacity: 0; }
  .img-swap:hover .img-swap-hover .img-swap-tag { opacity: 1; }
}

.img-swap-hover .img-swap-tag { opacity: 0; }

.img-swap.is-flipped .img-swap-base  .img-swap-tag { opacity: 0; }
.img-swap.is-flipped .img-swap-hover .img-swap-tag { opacity: 1; }


/* Empty state when filter returns no results */
.gallery-empty {
  grid-column: 1 / -1;
  padding-block: var(--s12);
  text-align: center;
  color: var(--ink-soft);
  font-family: var(--ff-serif);
  font-style: italic;
  font-size: 1.15rem;
  display: none;
}

.gallery-empty.is-visible {
  display: block;
}


/* ═══════════════════════════════════════════════════════════════════
   §4 BEFORE / AFTER COMPARISON SLIDER
   Pointer-driven drag — physical left/right (not logical props)
   because the slider is a directional visual element.
   ═════════════════════════════════════════════════════════════════ */

.compare-sec {
  padding-block: var(--s18);
  background: var(--surface);
}

.compare-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border-radius: 8px;
  max-width: 900px;
  margin-inline: auto;
  cursor: col-resize;
  /* Prevent text selection while dragging */
  user-select: none;
  -webkit-user-select: none;
}

.compare-before,
.compare-after {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.compare-after {
  /* Default: show left half (after). Updated by JS. */
  clip-path: inset(0 50% 0 0);
}

/* Vertical divider line */
.compare-divider {
  position: absolute;
  top: 0;
  left: 50%;           /* positioned by JS */
  width: 2px;
  height: 100%;
  background: rgba(255, 255, 255, 0.9);
  transform: translateX(-50%);
  z-index: 3;
  pointer-events: none;
  box-shadow: 0 0 12px rgba(0, 0, 0, 0.25);
}

/* Round drag handle at center of divider */
.compare-handle {
  position: absolute;
  top: 50%;
  left: 50%;           /* set by JS to match divider */
  transform: translate(-50%, -50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #fff;
  z-index: 4;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.3);
  pointer-events: none;
  flex-shrink: 0;
}

.compare-arrows {
  display: flex;
  align-items: center;
  gap: 3px;
  color: var(--mocha);
}

.compare-arrows svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
}

/* Side labels */
.compare-label {
  position: absolute;
  bottom: var(--s2);
  z-index: 3;
  background: rgba(22, 18, 16, 0.55);
  backdrop-filter: blur(6px);
  color: #EFE7DB;
  font-size: var(--f-label);
  letter-spacing: 0.08em;
  padding: 3px 10px;
  border-radius: 100px;
  pointer-events: none;
}

.compare-label--after  { left: var(--s3); }
.compare-label--before { right: var(--s3); }

/* Hint text below slider */
.compare-hint {
  text-align: center;
  margin-block-start: var(--s3);
  font-size: var(--f-label);
  color: var(--ink-soft);
  letter-spacing: 0.06em;
}

@media (max-width: 600px) {
  .compare-wrap {
    aspect-ratio: 4 / 3;
  }
}


/* ═══════════════════════════════════════════════════════════════════
   §5 GALLERY CTA
   ═════════════════════════════════════════════════════════════════ */

.gallery-cta {
  padding-block: var(--s18);
  text-align: center;
  background: var(--bg);
}

.gallery-cta-title {
  margin-block-end: var(--s5);
}

.gallery-cta-sub {
  font-size: var(--f-body);
  color: var(--ink-soft);
  margin-block-end: var(--s8);
  max-width: 44ch;
  margin-inline: auto;
  line-height: var(--lh-body);
}