/* ========================================
   PRODUCT DETAIL PAGE — Mobile-First
   ======================================== */

.product-detail {
  overflow-x: hidden;
}

/* ===== PRODUCT HERO ===== */
.product-hero {
  background: var(--color-surface);
  padding-top: calc(var(--header-height) + var(--space-6));
  padding-bottom: var(--space-12);
}

.product-hero .container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.product-hero-inner {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--container-pad);
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

/* ===== GALLERY ===== */
.product-gallery {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.gallery-main {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, #e8e4dc, #f0ece4);
  aspect-ratio: 4/3;
  max-height: 480px;
}
.gallery-main img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}
.gallery-main:hover img { transform: scale(1.02); }

.gallery-thumbs {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  padding-bottom: var(--space-1);
}
.gallery-thumbs::-webkit-scrollbar { display: none; }

.thumb-btn {
  flex-shrink: 0;
  width: 72px;
  height: 56px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 2px solid transparent;
  transition: border-color var(--transition-fast), opacity var(--transition-fast);
  opacity: 0.65;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}
.thumb-btn img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.thumb-btn--active {
  border-color: var(--color-primary);
  opacity: 1;
}
.thumb-btn:hover { opacity: 0.9; }

/* ===== PRODUCT INFO ===== */
.product-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.product-cat-link {
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: opacity var(--transition-fast);
}
.product-cat-link:hover { opacity: 0.75; }

.product-title {
  font-family: var(--font-display);
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.15;
}

.product-lead {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: 1.65;
}

.product-meta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding-block: var(--space-3);
  border-block: 1px solid var(--color-border);
}
.product-sku,
.product-brand {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}
.product-sku strong,
.product-brand strong {
  color: var(--color-text);
  font-weight: 600;
}

.product-avail {
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: 3px 12px;
  border-radius: var(--radius-full);
}
.product-avail--in  { background: #d4edda; color: #155724; }
.product-avail--out { background: #f8d7da; color: #721c24; }
.product-avail--pre { background: #fff3cd; color: #856404; }

.product-price {
  font-family: var(--font-display);
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-primary);
}

.product-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

@media (min-width: 480px) {
  .product-actions { flex-direction: row; }
  .product-actions .btn { flex: 1; }
}

@media (min-width: 1024px) {
  .product-hero-inner {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--space-12);
  }
  .product-gallery { flex: 1; }
  .product-info { flex: 0 0 min(440px, 42%); }
  .product-actions { flex-direction: column; }
  .product-actions .btn { flex: none; }
}

/* ===== DESCRIPTION ===== */
.product-description {
  padding-block: var(--space-12) var(--space-16);
  background: var(--color-bg);
}
.product-description h2 {
  font-size: var(--font-size-2xl);
  color: var(--color-primary);
  margin-bottom: var(--space-6);
}
.product-description__body {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.8;
  max-width: 72ch;
}
.product-description__body p { margin-bottom: var(--space-4); }
.product-description__body p:last-child { margin-bottom: 0; }

/* ===== RELATED ===== */
.related-products {
  padding-block: var(--space-12);
  background: var(--color-surface);
}
.related-products .container {
  margin-bottom: var(--space-6);
}
.related-products h2 {
  font-size: var(--font-size-2xl);
  color: var(--color-primary);
}