/* ==========================================================================
   products.css - Product Listing & Category Page Styles
   ========================================================================== */

/* ------------------------------------------------------------------
   Category Hero Banner
   ------------------------------------------------------------------ */
.category-hero {
  position: relative;
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 40%, var(--color-primary-light) 100%);
  overflow: hidden;
  padding: var(--space-20) 0;
}

.category-hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -15%;
  width: 600px;
  height: 600px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.03);
  pointer-events: none;
}

.category-hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -10%;
  width: 400px;
  height: 400px;
  border-radius: var(--radius-full);
  background: rgba(255, 215, 0, 0.04);
  pointer-events: none;
}

.category-hero__content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: 0 var(--container-padding);
}

.category-hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-accent);
  margin-bottom: var(--space-6);
  backdrop-filter: blur(4px);
}

.category-hero__badge i {
  font-size: var(--text-xs);
}

.category-hero__title {
  font-family: var(--font-heading);
  font-size: var(--text-5xl);
  font-weight: var(--font-bold);
  color: var(--color-white);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-6);
}

.category-hero__title span {
  color: var(--color-accent);
}

.category-hero__subtitle {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.8);
  line-height: var(--leading-relaxed);
  max-width: 600px;
  margin: 0 auto var(--space-8);
}

.category-hero__buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* ------------------------------------------------------------------
   Series Cards (3-column grid)
   ------------------------------------------------------------------ */
.series-cards {
  padding: var(--section-padding);
}

.series-cards__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--grid-gap);
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.series-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
}

.series-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-card-hover);
}

.series-card__image {
  position: relative;
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.series-card__image i {
  font-size: 48px;
  color: rgba(255, 255, 255, 0.25);
}

.series-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.series-card__body {
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  text-align: center;
}

.series-card__name {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.series-card__tagline {
  font-size: var(--text-base);
  color: var(--color-gray-600);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
  flex-grow: 1;
}

.series-card__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background-color: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-primary);
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius);
  border: 2px solid var(--color-primary);
  transition: all var(--transition-fast);
}

.series-card__cta:hover {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary-light);
  color: var(--color-white);
}

/* ------------------------------------------------------------------
   Brand Advantage (Split layout: image + text)
   ------------------------------------------------------------------ */
.brand-advantage {
  padding: var(--section-padding);
  background-color: var(--color-gray-50);
}

.brand-advantage__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.brand-advantage__image {
  position: relative;
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.brand-advantage__image i {
  font-size: 80px;
  color: rgba(255, 255, 255, 0.2);
}

.brand-advantage__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.brand-advantage__content {
  display: flex;
  flex-direction: column;
}

.brand-advantage__title {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-6);
}

.brand-advantage__title span {
  color: var(--color-accent);
}

.brand-advantage__text {
  font-size: var(--text-base);
  color: var(--color-gray-600);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
}

.brand-advantage__list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.brand-advantage__list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  font-size: var(--text-base);
  color: var(--color-gray-700);
  line-height: var(--leading-relaxed);
}

.brand-advantage__list li i {
  color: var(--color-accent);
  margin-top: 3px;
  flex-shrink: 0;
}

/* ------------------------------------------------------------------
   Scenario Grid (2x2 application scenarios)
   ------------------------------------------------------------------ */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--grid-gap);
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.scenario-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: flex-end;
  transition: transform var(--transition-base);
}

.scenario-card:hover {
  transform: translateY(-3px);
}

.scenario-card__image {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.scenario-card__image i {
  font-size: 48px;
  color: rgba(255, 255, 255, 0.2);
}

.scenario-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scenario-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 26, 58, 0.85) 0%, rgba(0, 42, 92, 0.3) 50%, transparent 100%);
}

.scenario-card__content {
  position: relative;
  z-index: 1;
  padding: var(--space-6);
  width: 100%;
}

.scenario-card__title {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-white);
  margin-bottom: var(--space-2);
}

.scenario-card__desc {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.8);
  line-height: var(--leading-relaxed);
  margin-bottom: 0;
}

/* ------------------------------------------------------------------
   Trust Badges Row (3 items)
   ------------------------------------------------------------------ */
.trust-badges-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--grid-gap);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.trust-badge {
  text-align: center;
  padding: var(--space-8) var(--space-6);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.trust-badge:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}

.trust-badge__icon {
  width: 72px;
  height: 72px;
  margin: 0 auto var(--space-5);
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
}

.trust-badge__icon i {
  font-size: var(--text-2xl);
  color: var(--color-white);
}

.trust-badge__title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--color-gray-900);
  margin-bottom: var(--space-3);
}

.trust-badge__desc {
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  line-height: var(--leading-relaxed);
  margin-bottom: 0;
}

/* ------------------------------------------------------------------
   Service Features (3 badges: OEM/ODM, Fast Delivery, Low MOQ)
   ------------------------------------------------------------------ */
.service-features {
  padding: var(--section-padding);
  background-color: var(--color-primary);
  position: relative;
  overflow: hidden;
}

.service-features::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -10%;
  width: 400px;
  height: 400px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.03);
  pointer-events: none;
}

.service-features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--grid-gap);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  position: relative;
  z-index: 1;
}

.service-feature {
  text-align: center;
  padding: var(--space-10) var(--space-8);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(4px);
  transition: background var(--transition-base);
}

.service-feature:hover {
  background: rgba(255, 255, 255, 0.08);
}

.service-feature__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-5);
  border-radius: var(--radius-full);
  background: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
}

.service-feature__icon i {
  font-size: var(--text-2xl);
  color: var(--color-primary-dark);
}

.service-feature__title {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-white);
  margin-bottom: var(--space-3);
}

.service-feature__desc {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.7);
  line-height: var(--leading-relaxed);
  margin-bottom: 0;
}

/* ------------------------------------------------------------------
   Product Grid (responsive grid for product cards)
   ------------------------------------------------------------------ */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--grid-gap);
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.product-grid__card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
  position: relative;
  text-decoration: none;
  color: inherit;
}

.product-grid__card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-card-hover);
}

.product-grid__badge {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  z-index: 2;
}

.product-grid__image {
  position: relative;
  aspect-ratio: 1;
  background: linear-gradient(135deg, var(--color-gray-100) 0%, var(--color-gray-200) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.product-grid__image i {
  font-size: 40px;
  color: rgba(0, 42, 92, 0.15);
}

.product-grid__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.product-grid__card:hover .product-grid__image img {
  transform: scale(1.05);
}

.product-grid__body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.product-grid__title {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--font-bold);
  color: var(--color-gray-900);
  margin-bottom: var(--space-2);
  line-height: var(--leading-snug);
}

.product-grid__title a,
.product-grid__card:hover .product-grid__title {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.product-grid__title a:hover,
.product-grid__card:hover .product-grid__title {
  color: var(--color-primary);
}

.product-grid__specs {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  margin-bottom: var(--space-3);
  line-height: var(--leading-relaxed);
}

.product-grid__action {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-primary);
  text-decoration: none;
  margin-top: auto;
  transition: color var(--transition-fast), gap var(--transition-fast);
}

.product-grid__card:hover .product-grid__action {
  color: var(--color-accent-dark);
  gap: var(--space-3);
}

/* ------------------------------------------------------------------
   Responsive: Tablet (768px - 1024px)
   ------------------------------------------------------------------ */
@media (max-width: 1024px) {
  .category-hero {
    min-height: 340px;
  }

  .category-hero__title {
    font-size: var(--text-4xl);
  }

  .series-cards__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--grid-gap-sm);
  }

  .brand-advantage__grid {
    gap: var(--space-10);
  }

  .scenario-grid {
    gap: var(--grid-gap-sm);
  }

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

  .products-layout {
    grid-template-columns: 220px 1fr;
    gap: var(--space-6);
  }

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

/* ------------------------------------------------------------------
   Responsive: Mobile (<768px)
   ------------------------------------------------------------------ */
@media (max-width: 767px) {
  .category-hero {
    min-height: 280px;
    padding: var(--space-12) 0;
  }

  .category-hero__title {
    font-size: var(--text-3xl);
  }

  .category-hero__subtitle {
    font-size: var(--text-base);
  }

  .category-hero__buttons {
    flex-direction: column;
    align-items: center;
  }

  .series-cards__grid {
    grid-template-columns: 1fr;
  }

  .series-card__body {
    padding: var(--space-6);
  }

  .brand-advantage__grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .scenario-grid {
    grid-template-columns: 1fr;
  }

  .scenario-card {
    aspect-ratio: 16 / 9;
  }

  .trust-badges-row {
    grid-template-columns: 1fr;
  }

  .service-features__grid {
    grid-template-columns: 1fr;
  }

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

  .product-grid__body {
    padding: var(--space-4);
  }

  /* Sidebar: stack layout on mobile */
  .products-layout {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .products-sidebar {
    position: static;
    display: none;
    margin-bottom: var(--space-4);
    border-radius: var(--radius-md);
  }

  .products-sidebar--mobile-open {
    display: block;
  }

  .products-main__filter-toggle {
    display: inline-flex;
  }

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

  .products-main__header {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ------------------------------------------------------------------
   Section Compact (reduced padding for filter bar)
   ------------------------------------------------------------------ */
.section--compact {
  padding-top: 0;
  padding-bottom: 0;
}

/* ------------------------------------------------------------------
   Products Sidebar Layout
   ------------------------------------------------------------------ */
.products-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: var(--space-8);
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--container-padding) var(--section-padding);
}

/* Sidebar */
.products-sidebar {
  position: sticky;
  top: 120px;
  align-self: start;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.products-sidebar__header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-gray-100);
  background: var(--color-gray-50);
}

.products-sidebar__title {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.products-sidebar__title i {
  color: var(--color-accent);
}

.products-sidebar__nav {
  padding: var(--space-3) 0;
}

.products-sidebar__link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-gray-700);
  text-decoration: none;
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
}

.products-sidebar__link:hover {
  color: var(--color-primary);
  background-color: var(--color-gray-50);
  border-left-color: var(--color-accent-light);
}

.products-sidebar__link--active {
  color: var(--color-primary);
  background-color: var(--color-gray-50);
  font-weight: var(--font-bold);
  border-left-color: var(--color-accent);
}

.products-sidebar__link i {
  width: 18px;
  text-align: center;
  color: var(--color-gray-400);
  font-size: var(--text-sm);
}

.products-sidebar__link--active i,
.products-sidebar__link:hover i {
  color: var(--color-accent);
}

.products-sidebar__count {
  margin-left: auto;
  font-size: var(--text-xs);
  color: var(--color-gray-400);
  background: var(--color-gray-100);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.products-sidebar__link--active .products-sidebar__count {
  background: var(--color-accent-light);
  color: var(--color-primary);
}

.products-sidebar__divider {
  height: 1px;
  background: var(--color-gray-100);
  margin: 0 var(--space-6);
}

.products-sidebar__help {
  padding: var(--space-5) var(--space-6);
  text-align: center;
}

.products-sidebar__help i {
  font-size: var(--text-2xl);
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.products-sidebar__help p {
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  margin-bottom: var(--space-3);
}

/* Main Content Area */
.products-main {
  min-width: 0;
}

.products-main__header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  gap: var(--space-4);
}

.products-main__title {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.products-main__desc {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  margin: 0;
}

.products-main__sort {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.products-main__filter-toggle {
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius);
  font-size: var(--text-sm);
  color: var(--color-gray-700);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.products-main__filter-toggle:hover {
  border-color: var(--color-accent);
  color: var(--color-primary);
}

.products-main__results {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
}

/* Product grid inside sidebar layout */
.products-main .product-grid--listing {
  grid-template-columns: repeat(3, 1fr);
}

/* ------------------------------------------------------------------
   Filter Tabs (legacy, kept for reference)
   ------------------------------------------------------------------ */
.filter-tabs {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-6) 0;
  flex-wrap: wrap;
}

.filter-tabs__item {
  position: relative;
  padding: var(--space-3) var(--space-6);
  background: transparent;
  border: none;
  font-family: var(--font-primary);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-gray-600);
  cursor: pointer;
  border-radius: var(--radius);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.filter-tabs__item:hover {
  color: var(--color-primary);
  background-color: var(--color-gray-50);
}

.filter-tabs__item--active {
  color: var(--color-primary);
  font-weight: var(--font-bold);
  background-color: var(--color-gray-50);
  border-bottom: 3px solid var(--color-accent);
  border-radius: var(--radius) var(--radius) 0 0;
}

/* ------------------------------------------------------------------
   Product Grid Override: 3-column for listing page
   ------------------------------------------------------------------ */
.product-grid--listing {
  grid-template-columns: repeat(3, 1fr);
}

/* ------------------------------------------------------------------
   Responsive: Small Mobile (<480px)
   ------------------------------------------------------------------ */
@media (max-width: 479px) {
  .product-grid {
    grid-template-columns: 1fr;
  }

  .product-grid--listing {
    grid-template-columns: 1fr;
  }
}