/**
 * HEAVY MACHINERY - Global Industrial Marketplace
 * Category System Stylesheet (Phase 2.2)
 * 
 * Reusable, taxonomy-driven design components matching the Light Industrial
 * precision aesthetic (deep teal, clean typography, restrained borders, subtle hover).
 */

/* ==========================================================================
   1. BREADCRUMBS COMPONENT
   ========================================================================== */
.category-breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.category-breadcrumbs a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.category-breadcrumbs a:hover {
  color: var(--color-primary-700);
}

.category-breadcrumbs .separator {
  color: var(--color-border-strong);
  font-size: 0.75rem;
  user-select: none;
}

.category-breadcrumbs .current {
  color: var(--color-text-heading);
  font-weight: var(--font-weight-semibold);
}

/* ==========================================================================
   2. CATEGORY PAGE HERO SECTION
   ========================================================================== */
.categories-hero-section {
  padding: 3rem 0 2.5rem;
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--color-border-subtle);
}

.categories-hero-content {
  max-width: 900px;
}

.categories-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.7rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary-600);
  background-color: var(--color-primary-50);
  border: 1px solid var(--color-primary-100);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-xs);
  margin-bottom: var(--space-3);
}

.categories-title {
  font-family: var(--font-family-display);
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: var(--font-weight-extrabold);
  letter-spacing: -0.025em;
  color: var(--color-text-heading);
  line-height: 1.15;
  margin-bottom: 0.75rem;
}

.categories-desc {
  font-size: var(--font-size-md);
  color: var(--color-text-body);
  line-height: var(--line-height-relaxed);
  max-width: 760px;
  margin-bottom: 1.5rem;
}

/* Category Search & Filter Toolbar */
.categories-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
}

.categories-search-box {
  position: relative;
  flex: 1;
  min-width: 260px;
  max-width: 480px;
}

.categories-search-input {
  width: 100%;
  height: 42px;
  padding: 0 2.5rem 0 2.4rem;
  font-size: var(--font-size-sm);
  color: var(--color-text-main);
  background-color: #FFFFFF;
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-xs);
  outline: none;
  transition: all var(--transition-fast);
}

.categories-search-input:focus {
  border-color: var(--color-primary-600);
  box-shadow: 0 0 0 3px rgba(22, 101, 90, 0.12);
}

.categories-search-icon {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-light);
  pointer-events: none;
}

.categories-stats-counter {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
}

.categories-stats-counter strong {
  color: var(--color-primary-800);
}

/* ==========================================================================
   3. CATEGORY CARDS GRID & CARDS
   ========================================================================== */
.categories-main-section {
  padding: 3rem 0 4.5rem;
  background-color: var(--color-bg-body);
}

.category-cards-directory-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

@media (max-width: 1100px) {
  .category-cards-directory-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 680px) {
  .category-cards-directory-grid {
    grid-template-columns: 1fr;
  }
}

/* Scalable Category Card Component (Section 12 specifications) */
.category-dir-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal), transform var(--transition-normal);
  position: relative;
}

.category-dir-card:hover {
  border-color: var(--color-primary-300);
  box-shadow: 0 8px 24px rgba(16, 78, 70, 0.08);
  transform: translateY(-2px);
}

.category-card-media {
  position: relative;
  height: 180px;
  background-color: var(--color-bg-subtle);
  overflow: hidden;
}

.category-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  display: block;
}

/* Image scale 1 -> 1.03 on hover */
.category-dir-card:hover .category-card-media img {
  transform: scale(1.03);
}

.category-card-media-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8, 40, 36, 0.05) 0%, rgba(8, 40, 36, 0.45) 100%);
  pointer-events: none;
}

.category-card-icon-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  width: 44px;
  height: 44px;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  z-index: 2;
}

.category-card-icon-badge img {
  width: 24px;
  height: 24px;
  object-fit: contain;
  filter: none;
}

.category-subcat-badge {
  position: absolute;
  bottom: 0.75rem;
  right: 0.75rem;
  background-color: rgba(12, 62, 56, 0.9);
  color: #FFFFFF;
  font-size: 0.7rem;
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.02em;
  padding: 0.25rem 0.55rem;
  border-radius: var(--radius-xs);
  backdrop-filter: blur(4px);
  z-index: 2;
}

.category-card-body {
  display: flex;
  flex-direction: column;
  padding: 1.25rem;
  flex: 1;
}

.category-card-name {
  font-family: var(--font-family-display);
  font-size: 1.2rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-heading);
  letter-spacing: -0.015em;
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.category-card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-body);
  line-height: var(--line-height-normal);
  margin-bottom: 1rem;
  flex: 1;
}

/* Subcategory Preview Chips */
.category-subcat-preview-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border-subtle);
}

.category-subcat-chip {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-body);
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border-subtle);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-xs);
  transition: all var(--transition-fast);
}

.category-dir-card:hover .category-subcat-chip {
  background-color: var(--color-primary-50);
  border-color: var(--color-primary-100);
  color: var(--color-primary-800);
}

/* Explore Category Link with arrow movement 4px -> 8px */
.category-card-footer-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary-700);
  margin-top: auto;
}

.category-card-footer-cta .cta-arrow {
  display: inline-block;
  transition: transform var(--transition-normal);
  margin-left: 4px;
}

.category-dir-card:hover .category-card-footer-cta {
  color: var(--color-primary-900);
}

.category-dir-card:hover .category-card-footer-cta .cta-arrow {
  transform: translateX(4px); /* Moves total 4px + 4px = 8px */
}

/* ==========================================================================
   4. TAXONOMY EXPLORER (LEVEL 0 -> LEVEL 1 -> LEVEL 2 INTERACTIVE)
   ========================================================================== */
.taxonomy-explorer-section {
  padding: 3.5rem 0 4rem;
  background-color: #FFFFFF;
  border-top: 1px solid var(--color-border-subtle);
  border-bottom: 1px solid var(--color-border-subtle);
}

.taxonomy-header {
  margin-bottom: 2rem;
}

.taxonomy-browser-container {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 1.5rem;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  background-color: var(--color-bg-surface);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

@media (max-width: 860px) {
  .taxonomy-browser-container {
    grid-template-columns: 1fr;
  }
}

.taxonomy-category-nav {
  background-color: var(--color-bg-subtle);
  border-right: 1px solid var(--color-border-subtle);
  padding: 0.75rem 0;
  max-height: 520px;
  overflow-y: auto;
}

@media (max-width: 860px) {
  .taxonomy-category-nav {
    border-right: none;
    border-bottom: 1px solid var(--color-border-subtle);
    max-height: 240px;
  }
}

.taxonomy-cat-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.65rem 1rem;
  background: transparent;
  border: none;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-main);
  text-align: left;
  cursor: pointer;
  border-left: 3px solid transparent;
  transition: all var(--transition-fast);
}

.taxonomy-cat-btn:hover {
  background-color: rgba(16, 78, 70, 0.05);
  color: var(--color-primary-700);
}

.taxonomy-cat-btn.active {
  background-color: #FFFFFF;
  color: var(--color-primary-800);
  font-weight: var(--font-weight-bold);
  border-left-color: var(--color-primary-700);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

.taxonomy-content-panel {
  padding: 1.5rem;
  overflow-y: auto;
  max-height: 520px;
}

.taxonomy-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border-subtle);
  margin-bottom: 1.25rem;
}

.taxonomy-panel-title {
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-heading);
}

.taxonomy-subcats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

@media (max-width: 600px) {
  .taxonomy-subcats-grid {
    grid-template-columns: 1fr;
  }
}

.taxonomy-subcat-card {
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xs);
  padding: 1rem;
  background-color: var(--color-bg-card);
  transition: all var(--transition-fast);
}

.taxonomy-subcat-card:hover {
  border-color: var(--color-primary-400);
  background-color: var(--color-primary-50);
}

.taxonomy-subcat-name {
  font-size: 0.95rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-heading);
  margin-bottom: 0.35rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.taxonomy-subcat-desc {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.4;
  margin-bottom: 0.75rem;
}

.taxonomy-types-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.taxonomy-type-item a {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  color: var(--color-primary-700);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
}

.taxonomy-type-item a:hover {
  text-decoration: underline;
  color: var(--color-primary-900);
}

.taxonomy-type-bullet {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: var(--color-primary-500);
}

/* ==========================================================================
   5. CATEGORY DETAIL PAGE STYLES
   ========================================================================== */
.category-detail-hero {
  padding: 3rem 0 2rem;
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--color-border-subtle);
}

.category-detail-header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.category-detail-info {
  flex: 1;
  min-width: 320px;
}

.category-level-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.72rem;
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary-700);
  background-color: var(--color-primary-50);
  border: 1px solid var(--color-primary-200);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-xs);
  margin-bottom: 0.75rem;
}

.category-detail-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* Subcategories Grid in Detail Page */
.subcategories-detail-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 1.5rem;
}

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

@media (max-width: 560px) {
  .subcategories-detail-grid {
    grid-template-columns: 1fr;
  }
}

.subcat-detail-card {
  display: flex;
  flex-direction: column;
  background-color: #FFFFFF;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  text-decoration: none;
  color: inherit;
  transition: all var(--transition-normal);
}

.subcat-detail-card:hover {
  border-color: var(--color-primary-400);
  box-shadow: 0 6px 18px rgba(16, 78, 70, 0.06);
  transform: translateY(-2px);
}

.subcat-detail-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-xs);
  background-color: var(--color-primary-50);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.75rem;
}

.subcat-detail-icon img {
  width: 20px;
  height: 20px;
}

.subcat-detail-title {
  font-size: 1.05rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-heading);
  margin-bottom: 0.35rem;
}

.subcat-detail-desc {
  font-size: 0.85rem;
  color: var(--color-text-body);
  line-height: var(--line-height-normal);
  margin-bottom: 0.75rem;
  flex: 1;
}

.subcat-detail-link {
  font-size: 0.8rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary-700);
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: auto;
}