/* Accessory rail ("Accessories you might like"), shared by configure.html and product.html.
   Built by accessory-rail.js; each page positions .related-rail-section itself. */
.related-rail-section {
  margin: 24px auto 0;
  box-sizing: border-box;
}
.related-rail-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.related-rail-heading {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
  flex: 1 1 auto;
  min-width: 0;
}
.related-rail-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--ns-text, var(--gpp-text, #1d1d1f));
  margin: 0;
  letter-spacing: -0.01em;
}
.related-rail-subtitle {
  font-size: 13px;
  color: var(--ns-text-tertiary, var(--gpp-text-tertiary, #86868b));
}
.related-rail {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 6px;
  scrollbar-width: thin;
}
.related-rail-chips {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.related-rail-chips:empty { display: none; }
.related-rail-chip {
  border: 1px solid var(--ns-border-light, var(--gpp-border-light, #e8e8ed));
  background: var(--ns-white, var(--gpp-white, #fff));
  color: var(--ns-text-secondary, var(--gpp-text-secondary, #6e6e73));
  border-radius: 980px;
  padding: 4px 11px;
  font: inherit;
  font-size: 12px;
  line-height: 1.4;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.related-rail-chip:hover { border-color: var(--ns-border, var(--gpp-border, #d2d2d7)); color: var(--ns-text, var(--gpp-text, #1d1d1f)); }
.related-rail-chip.is-active { background: var(--ns-text, var(--gpp-text, #1d1d1f)); border-color: var(--ns-text, var(--gpp-text, #1d1d1f)); color: #fff; }
.related-rail::-webkit-scrollbar { height: 6px; }
.related-rail::-webkit-scrollbar-thumb { background: var(--ns-border, var(--gpp-border, #d2d2d7)); border-radius: 3px; }
.related-card {
  flex: 0 0 132px;
  scroll-snap-align: start;
  background: var(--ns-white, var(--gpp-white, #fff));
  border: 1px solid var(--ns-border-light, var(--gpp-border-light, #e8e8ed));
  border-radius: 10px;
  padding: 10px;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: box-shadow 0.2s, border-color 0.15s;
}
.related-card:hover {
  border-color: var(--ns-border, var(--gpp-border, #d2d2d7));
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
  text-decoration: none;
  color: inherit;
}
.related-card-img {
  width: 100%;
  height: 84px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 8px;
}
.related-card-img img {
  width: 84px;
  height: 84px;
  object-fit: contain;
}
.related-card-img .related-card-placeholder {
  color: var(--ns-text-tertiary, var(--gpp-text-tertiary, #86868b));
  font-size: 1.5rem;
  opacity: 0.35;
}
.related-card-body {
  width: 100%;
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
}
.related-card-name {
  font-size: 12px;
  font-weight: 500;
  line-height: 1.3;
  color: var(--ns-text, var(--gpp-text, #1d1d1f));
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  line-clamp: 2;
  overflow: hidden;
}
.related-card-price {
  font-size: 12px;
  color: var(--ns-text, var(--gpp-text, #1d1d1f));
  margin-top: auto;
  padding-top: 4px;
}
.related-card-price strong {
  color: var(--ns-text, var(--gpp-text, #1d1d1f));
  font-weight: 600;
}
.related-rail-skeleton {
  flex: 0 0 132px;
  height: 150px;
  border-radius: 10px;
  border: 1px solid var(--ns-border-light, var(--gpp-border-light, #e8e8ed));
  background: linear-gradient(90deg, #f5f5f7 0%, #ebebee 50%, #f5f5f7 100%);
  background-size: 200% 100%;
  animation: relatedSkel 1.4s linear infinite;
}
@keyframes relatedSkel { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* Slider arrows (same pattern as the shop pages). Reusable: put any
   horizontal scroller in a position:relative wrapper with a
   .rail-arr-l / .rail-arr-r button pair and call initRailArrows(). */
.related-rail-wrap { position: relative; }
.rail-arr {
  position: absolute;
  top: calc(50% - 3px); /* centre on the cards, not the scrollbar gap */
  transform: translateY(-50%);
  z-index: 3;
  width: 30px; height: 30px;
  padding: 0;
  border-radius: 50%;
  background: rgba(255,255,255,0.94);
  border: 1px solid var(--ns-border-light, var(--gpp-border-light, #e8e8ed));
  box-shadow: 0 2px 8px rgba(0,0,0,0.10);
  color: var(--ns-text, var(--gpp-text, #1d1d1f));
  font-size: 11px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity 0.18s, box-shadow 0.15s;
  -webkit-tap-highlight-color: transparent;
}
.rail-arr:hover { box-shadow: 0 3px 12px rgba(0,0,0,0.16); }
.rail-arr:focus { outline: none; }
.rail-arr:focus-visible { outline: none; box-shadow: 0 0 0 3px rgba(0,102,204,0.25); }
.rail-arr.is-on { opacity: 1; pointer-events: auto; }
.rail-arr-l { left: -15px; }
.rail-arr-r { right: -15px; }
@media (max-width: 640px) {
  .rail-arr { width: 28px; height: 28px; }
  .rail-arr-l { left: -8px; }
  .rail-arr-r { right: -8px; }
}
@media (max-width: 640px) {
  .related-card, .related-rail-skeleton { flex-basis: 120px; }
}