/* ============================================
   TechStore - Catalog Styles (БЕЗ товарних карток)
   Тільки фільтри, сортування, toolbar, no-results
   ============================================ */

.catalog-section {
  padding: var(--spacing-xl) 0;
  min-height: calc(100vh - var(--header-height));
}

/* ============================================
   Catalog Layout
   ============================================ */
.catalog-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--spacing-xl);
}

/* ============================================
   Sidebar Filters
   ============================================ */
.catalog-sidebar {
  position: sticky;
  top: calc(var(--header-height) + var(--spacing-md));
  height: fit-content;
  max-height: calc(100vh - var(--header-height) - var(--spacing-xl));
  overflow-y: auto;
  padding: var(--spacing-lg);
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: var(--transition-fast);
}

.sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--border-color);
}

.sidebar-header h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
}

.btn-reset-filters {
  font-size: var(--font-size-sm);
  color: var(--primary-color);
  cursor: pointer;
  background: none;
  border: none;
  font-weight: 600;
  transition: var(--transition-fast);
}

.btn-reset-filters:hover {
  text-decoration: underline;
}

/* Filter Groups */
.filter-group {
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

.filter-group:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.filter-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.filter-options {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.filter-option {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.filter-option:hover {
  color: var(--primary-color);
}

.filter-option input[type="checkbox"],
.filter-option input[type="radio"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--primary-color);
}

/* ============================================
   Price Range Filter
   ============================================ */
.price-range {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: var(--spacing-sm);
  width: 100%;
}

.price-range input {
  flex: 1;
  min-width: 0;
  padding: 0.5rem 0.4rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  transition: var(--transition-base);
  box-sizing: border-box;
}

.price-range input:focus {
  outline: none;
  border-color: var(--primary-color);
}

.price-range span {
  color: var(--text-secondary);
  flex-shrink: 0;
  font-size: 0.875rem;
}

.btn-apply-price {
  width: 100%;
  padding: 0.5rem;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-base);
  margin-top: 0.5rem;
}

.btn-apply-price:hover {
  background: var(--primary-dark);
}

/* ============================================
   Catalog Main Content
   ============================================ */
.catalog-main {
  min-height: 500px;
}

/* Toolbar */
.catalog-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  padding: 0.875rem var(--spacing-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
}

.toolbar-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.btn-toggle-filters {
  display: none;
  padding: 0.5rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-base);
}

.btn-toggle-filters:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.products-count {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.products-count strong {
  color: var(--primary-color);
  font-weight: 700;
}

.toolbar-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.sort-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--font-size-sm);
}

.sort-label > span {
  line-height: 1;
  white-space: nowrap;
  transform: translateY(-1px);
}

.sort-select {
  height: 48px;
  padding: 0 2.75rem 0 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  line-height: 1.2;
  cursor: pointer;
  background: var(--bg-primary);
  transition: var(--transition-base);
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.95rem center;
}

.sort-select::-ms-expand {
  display: none;
}

.sort-select:focus {
  outline: none;
  border-color: var(--primary-color);
}

/* View Toggle */
.view-toggle {
  display: flex;
  gap: 0.5rem;
}

.view-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-base);
  color: var(--text-secondary);
}

.view-btn:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.view-btn.active {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  border-color: transparent;
  color: white;
  box-shadow: 0 4px 10px rgba(99, 102, 241, 0.3);
}

/* ============================================
   Products Grid - базова структура
   ============================================ */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  align-items: start;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.products-grid .product-card {
  height: auto;
  align-self: start;
}

.products-grid:has(.no-results) {
  display: flex;
  justify-content: center;
}

/* List View */
.products-grid.list-view {
  grid-template-columns: 1fr;
}

.products-grid.list-view:has(.no-results) {
  display: flex;
}

/* ============================================
   No Results
   ============================================ */
.no-results {
  --no-results-accent: rgba(99, 102, 241, 0.2);
  --no-results-surface: color-mix(in srgb, var(--bg-secondary) 85%, #6366f1 15%);
  --no-results-border: color-mix(in srgb, var(--border-color) 70%, #6366f1 30%);
  position: relative;
  text-align: center;
  padding: clamp(2rem, 4vw, 3rem);
  background: linear-gradient(160deg, var(--no-results-surface), var(--bg-secondary));
  border: 1px solid var(--no-results-border);
  border-radius: var(--radius-xl);
  margin: var(--spacing-xl) auto;
  width: min(100%, 760px);
  box-shadow: 0 16px 34px rgba(15, 23, 42, 0.16);
  overflow: hidden;
}

.no-results::before {
  content: '';
  position: absolute;
  inset: -40% auto auto -15%;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--no-results-accent), transparent 68%);
  pointer-events: none;
}

.no-results-icon {
  width: 132px;
  height: 132px;
  margin: 0 auto var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(145deg, var(--bg-primary), color-mix(in srgb, var(--bg-primary) 85%, #6366f1 15%));
  border-radius: var(--radius-full);
  font-size: 4.25rem;
  color: var(--primary-color);
  border: 1px solid color-mix(in srgb, var(--border-color) 60%, #6366f1 40%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), 0 10px 24px rgba(99, 102, 241, 0.22);
}

.no-results-title {
  font-size: clamp(1.8rem, 2.5vw, 2.2rem);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  letter-spacing: 0.01em;
}

.no-results-text {
  color: var(--text-secondary);
  font-size: 1.08rem;
  line-height: 1.6;
  margin-bottom: var(--spacing-xl);
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
}

.no-results-reset {
  margin-top: 0;
  min-height: 52px;
  padding: 0.95rem 1.4rem;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  box-shadow: 0 12px 24px rgba(99, 102, 241, 0.28);
}

/* ============================================
   Active Filters
   ============================================ */
.active-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: var(--spacing-md);
}

.filter-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.75rem;
  background: rgba(99, 102, 241, 0.08);
  color: var(--primary-color);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.filter-tag button {
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  padding: 0;
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  transition: var(--transition-fast);
}

.filter-tag button:hover {
  background: var(--primary-color);
  color: white;
}

/* ============================================
   Mobile Filters Overlay
   ============================================ */
.filters-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 9997;
  display: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.filters-overlay.active {
  display: block;
  opacity: 1;
}

.catalog-sidebar.active {
  left: 0;
}

/* ============================================
   Loading State
   ============================================ */
.catalog-loading {
  text-align: center;
  padding: var(--spacing-2xl);
}

.catalog-loading .spinner {
  width: 50px;
  height: 50px;
  margin: 0 auto var(--spacing-md);
}

/* ============================================
   Filter Count Badge
   ============================================ */
.filter-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 0.5rem;
  background: var(--primary-color);
  color: white;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 700;
  margin-left: 0.5rem;
}

/* ============================================
   Catalog Animations
   ============================================ */
@keyframes filterSlideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.catalog-sidebar {
  animation: filterSlideIn 0.3s ease;
}

/* ============================================
   Responsive Adjustments
   ============================================ */
@media (max-width: 1024px) {
  .catalog-layout {
    grid-template-columns: 250px 1fr;
  }

  .products-grid {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  }
}

@media (max-width: 768px) {
  .catalog-layout {
    grid-template-columns: 1fr;
  }

  .catalog-sidebar {
    position: fixed;
    top: 0;
    left: -100%;
    width: 85%;
    max-width: 320px;
    height: 100vh;
    max-height: 100vh;
    z-index: 9998;
    transition: left 0.3s ease;
    border-radius: 0;
    overflow-y: auto;
  }

  .btn-toggle-filters {
    display: flex;
  }

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

  .products-grid.list-view {
    grid-template-columns: 1fr;
  }

  .view-toggle {
    display: none;
  }

  .catalog-toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-sm);
  }

  .toolbar-left,
  .toolbar-right {
    width: 100%;
    justify-content: space-between;
  }
}

@media (max-width: 480px) {
  .products-grid {
    grid-template-columns: 1fr;
  }

  .filter-options {
    gap: 0.5rem;
  }

  .filter-option {
    font-size: 0.813rem;
  }

  .catalog-sidebar {
    width: 90%;
    max-width: 100%;
  }

  .price-range {
    flex-wrap: nowrap;
    gap: 0.375rem;
  }
  
  .price-range input {
    padding: 0.4rem 0.3rem;
    font-size: 0.8rem;
  }
  
  .price-range span {
    font-size: 0.75rem;
  }
}