/* ============================================================
   products.css — BTR Systems Product Catalogue Page
   ============================================================ */

/* Match top heading spacing with Gallery/About/Services */
.service-pan-wrapper {
  padding-bottom: 0;
}

.service-pan-wrapper .pan-header {
  margin-bottom: 0;
}

.service-pan-wrapper .service-eyebrow {
  margin-bottom: 0.25rem;
}

.service-pan-wrapper+.products-tab-nav {
  margin-top: 0.85rem;
}

/* ── STICKY TAB NAV ───────────────────────────────────────── */

.products-tab-nav {
  position: sticky;
  top: var(--header-height, 110px);
  z-index: 999;
  background: var(--color-white);
  margin-top: 0;
  padding-top: 0.45rem;
  border-bottom: 1px solid var(--color-gray-200);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.products-tab-nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.8rem var(--space-md) 0.8rem;
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.products-tab-nav-inner::-webkit-scrollbar {
  display: none;
}

.tab-btn {
  --tab-progress: 0;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 0.85rem 1rem 1.05rem;
  min-height: 3.3rem;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-gray-500);
  text-decoration: none;
  border: 1px solid var(--color-gray-200);
  border-radius: 10px;
  background: #fff;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
  white-space: nowrap;
}

.tab-btn::before,
.tab-btn::after {
  content: "";
  position: absolute;
  left: 0.65rem;
  right: 0.65rem;
  bottom: 0.28rem;
  height: 3px;
  border-radius: 999px;
}

.tab-btn::before {
  background: var(--color-gray-200);
}

.tab-btn::after {
  background: var(--color-black);
  transform: scaleX(var(--tab-progress));
  transform-origin: left center;
  transition: transform 0.14s linear;
}

.tab-btn:hover {
  color: var(--color-black);
  border-color: var(--color-gray-400);
}

.tab-btn.active {
  color: var(--color-black);
  border-color: var(--color-black);
  background: #f8fafc;
}


/* ── PRODUCT SECTIONS ─────────────────────────────────────── */

.products-section {
  padding: 2rem 0 2.75rem;
  border-bottom: 1px solid var(--color-gray-200);
  scroll-margin-top: 175px;
}

.products-section-alt {
  background-color: var(--color-gray-50);
}

.products-section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.products-section-header {
  display: flex;
  align-items: baseline;
  gap: 1.2rem;
  margin-bottom: 3rem;
  padding-bottom: 1.25rem;
  border-bottom: 2px solid var(--color-gray-200);
}

.products-section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 2.8vw, 2.2rem);
  font-weight: 700;
  color: var(--color-black);
  margin: 0;
}

.products-section-count {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-gray-400);
  flex-shrink: 0;
}


/* ── PRODUCT GRIDS ────────────────────────────────────────── */

/* Default: 4-column desktop layout */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

/* Large groups match the same desktop layout */
.product-grid.product-grid-lg {
  grid-template-columns: repeat(4, 1fr);
}


/* ── PRODUCT CARD ─────────────────────────────────────────── */

.product-card {
  display: flex;
  flex-direction: column;
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: 4px;
  overflow: hidden;
  text-decoration: none;
  color: var(--color-black);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  will-change: transform;
}

.products-section-alt .product-card {
  background: var(--color-white);
}

.product-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
  border-color: var(--color-black);
}

.product-card-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--color-gray-100);
  position: relative;
}

.product-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
  display: block;
}

.product-card:hover .product-card-image img {
  transform: scale(1.02);
}

.product-card-content {
  padding: 1.25rem 1.5rem 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.product-card-content h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-black);
  margin: 0;
  line-height: 1.3;
}

.product-card-content p {
  font-size: 0.85rem;
  color: var(--color-gray-500);
  margin: 0;
  line-height: 1.5;
}

.view-details {
  margin-top: auto;
  padding-top: 0.85rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-black);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: gap 0.2s ease;
}

.product-card:hover .view-details {
  gap: 0.55rem;
}


/* ── STONE CHIPS BADGE ────────────────────────────────────── */

.product-badge-stone {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  background: var(--color-gray-900);
  color: var(--color-white);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 2px;
  margin-top: 0.2rem;
  align-self: flex-start;
}


/* ── 3D VIEWER CALLOUT ────────────────────────────────────── */

.viewer-callout {
  margin-top: 4rem;
  padding: 2.5rem;
  border: 1px solid var(--color-gray-200);
  border-radius: 4px;
  background: var(--color-gray-50);
}

.viewer-callout p {
  font-size: 0.95rem;
  color: var(--color-gray-700);
  margin: 0 0 1.5rem;
}

.viewer-callout strong {
  color: var(--color-black);
}

.viewer-embed {
  width: 100%;
  height: 480px;
  border: none;
  border-radius: 4px;
  display: block;
  background: var(--color-gray-100);
}


/* ── RESPONSIVE ───────────────────────────────────────────── */

@media (max-width: 1200px) {
  .product-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .product-grid.product-grid-lg {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 900px) {
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .product-grid.product-grid-lg {
    grid-template-columns: repeat(2, 1fr);
  }

  .products-section {
    padding: 3.5rem 0;
    scroll-margin-top: 140px;
  }
}

@media (max-width: 1024px) {
  .page-hero-eyebrow {
    display: none;
  }
}

@media (max-width: 600px) {

  .product-grid,
  .product-grid.product-grid-lg {
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
  }

  .product-card-content {
    padding: 0.75rem;
    gap: 0.25rem;
  }

  .product-card-content h3 {
    font-size: 0.85rem;
  }

  .product-card-content p {
    display: none;
    /* Hide description for ultra-compact layout */
  }

  .view-details {
    padding-top: 0.4rem;
    font-size: 0.7rem;
  }

  .products-tab-nav-inner {
    padding: 0 0.25rem;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-template-rows: repeat(2, auto);
    overflow-x: visible;
  }

  .tab-btn {
    padding: 0.7rem 0.5rem;
    min-height: 3rem;
    font-size: 0.72rem;
    white-space: normal;
    text-align: center;
    line-height: 1.25;
    border-radius: 8px;
  }

  .products-section-header {
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
  }

  .products-section {
    scroll-margin-top: 195px;
  }

  .viewer-embed {
    height: 320px;
  }

  .viewer-callout {
    padding: 1rem;
    margin-top: 2rem;
  }
}

/* ── Interaction Polish ──────────────────────────────────── */
.products-tab-nav {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.products-tab-nav-inner {
  scroll-snap-type: x proximity;
}

.tab-btn {
  scroll-snap-align: start;
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.04);
  transition:
    color 0.18s ease,
    border-color 0.18s ease,
    background-color 0.18s ease,
    transform 0.18s ease,
    box-shadow 0.18s ease;
}

.tab-btn:hover,
.tab-btn:focus-visible {
  color: var(--color-black);
  border-color: var(--color-gray-400);
  background: #fbfbfb;
  transform: translateY(-1px);
  box-shadow: 0 12px 26px rgba(15, 23, 42, 0.08);
}

.tab-btn:focus-visible {
  outline: none;
}

.tab-btn:active {
  transform: translateY(0) scale(0.99);
  box-shadow: 0 6px 14px rgba(15, 23, 42, 0.06);
}

.tab-btn.active {
  background: #111827;
  color: #fff;
  border-color: #111827;
  box-shadow: 0 14px 30px rgba(17, 24, 39, 0.14);
}

.tab-btn.active::before {
  background: rgba(255, 255, 255, 0.18);
}

.tab-btn.active::after {
  background: #fff;
}

.product-card {
  border-radius: 12px;
  transition:
    transform 0.28s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.28s ease,
    border-color 0.28s ease;
}

.product-card:hover,
.product-card:focus-visible {
  transform: translateY(-3px);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
  border-color: rgba(17, 24, 39, 0.28);
}

.product-card:focus-visible {
  outline: none;
}

.product-card:active {
  transform: translateY(-2px) scale(0.995);
}

.product-card:hover .product-card-image img,
.product-card:focus-visible .product-card-image img {
  transform: scale(1.02);
}

.view-details {
  transition: gap 0.18s ease, transform 0.18s ease, color 0.18s ease;
}

.product-card:hover .view-details,
.product-card:focus-visible .view-details {
  gap: 0.6rem;
  transform: translateX(2px);
}

@media (max-width: 900px) {
  .products-tab-nav-inner {
    justify-content: flex-start;
  }
}

@media (max-width: 600px) {
  .products-tab-nav {
    padding-top: 0.35rem;
  }

  .products-tab-nav-inner {
    gap: 0.4rem;
  }

  .tab-btn {
    padding: 0.64rem 0.5rem 0.84rem;
    min-height: 2.85rem;
  }
}