.product-gallery { 
  --thumb-size: 100px; 
  --gap: .5rem; 
  --ring: #0d6efd; 
}

.product-gallery .pg-main img { 
  max-width: 100%; 
  height: auto; 
  display: block; 
  margin-inline: auto; 
}

/* Thumbs strip */
.pg-thumbs {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: .25rem;
}

.pg-track {
  display: flex;
  gap: var(--gap);
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scroll-behavior: smooth;
  padding: .25rem .25rem .5rem;
  border-radius: .5rem;
  outline: none;
  will-change: scroll-position;
}

.pg-track::-webkit-scrollbar { height: 10px; }
.pg-track::-webkit-scrollbar-track { background: rgba(0,0,0,.06); border-radius: 8px; }
.pg-track::-webkit-scrollbar-thumb { background: rgba(0,0,0,.28); border-radius: 8px; }
.pg-track::-webkit-scrollbar-thumb:hover { background: rgba(0,0,0,.4); }
.pg-track.dragging { cursor: grabbing; }

.pg-thumb {
  flex: 0 0 auto;
  width: var(--thumb-size);
  height: var(--thumb-size);
  padding: 0;
  border: 2px solid transparent;
  background: transparent;
  border-radius: .5rem;
  cursor: pointer;
}

.pg-thumb img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  border-radius: .4rem;
}

.pg-thumb[aria-selected="true"] { 
  border-color: var(--ring); 
}

/* Nav buttons */
.pg-nav {
  width: 2.25rem;
  height: 2.25rem;
  border: 1px solid rgba(0,0,0,.15);
  background: #fff;
  border-radius: 999px;
  font-size: 1.25rem;
  line-height: 1;
  display: inline-grid;
  place-items: center;
  cursor: pointer;
  user-select: none;
}

.pg-nav[disabled] { 
  opacity: .4; 
  cursor: default; 
}

/* Lightbox (white background) */
.pg-lightbox {
  position: fixed; 
  inset: 0;
  background: rgba(255,255,255,0.95);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  will-change: opacity, transform;
  contain: content;
}

.pg-lightbox[aria-hidden="false"] { 
  display: flex; 
}

.pg-lightbox img {
  max-width: 95vw; 
  max-height: 95vh;
  width: auto; 
  height: auto; 
  display: block;
  box-shadow: 0 4px 20px rgba(0,0,0,.25);
  background: #fff;
  border-radius: .25rem;
}

.pg-lightbox .pg-lb-close,
.pg-lightbox .pg-lb-prev,
.pg-lightbox .pg-lb-next {
  position: absolute;
  top: 50%; 
  transform: translateY(-50%);
  width: 44px; 
  height: 44px; 
  border-radius: 999px;
  border: 1px solid rgba(0,0,0,.3);
  background: rgba(255,255,255,.9);
  color: #000; 
  font-size: 22px; 
  display: grid; 
  place-items: center;
  cursor: pointer; 
  user-select: none;
}

.pg-lightbox .pg-lb-close { 
  top: 24px; 
  right: 24px; 
  transform: none; 
}

.pg-lightbox .pg-lb-prev { left: 24px; }
.pg-lightbox .pg-lb-next { right: 24px; }

.pg-lightbox button:focus-visible { 
  outline: 2px solid #000; 
  outline-offset: 2px; 
}

/* Body scroll lock when lightbox open */
.pg-body-locked { 
  overflow: hidden; 
}