/* ============================================
   PickPhone - Phones List Page Styles
   ============================================
   
   📁 FILE STRUCTURE (1059+ lines)
   ================================
   
   1. TOP BAR (Line 30-60)
      - .top-bar, .back-link, .mini-logo
      - .mobile-filter-toggle
   
   2. PAGE HEADER (Line 65-120)
      - .page-header, .page-title, .page-subtitle
      - .quick-filter-tags
   
   3. MAIN LAYOUT (Line 125-135)
      - .main-content, .content-wrapper
   
   4. FILTER SIDEBAR (Line 140-660) ⚠️ LARGEST SECTION
      - .filter-sidebar, .filter-header
      - .filter-group, .filter-group-header
      - .filter-options (Brand list with scrollbar)
      - .filter-option (Tag-like brand selection)
      - .price-range-display, .price-input-group
      - .range-slider-container, .range-track, .range-fill
      - .price-presets
      - .filter-chips (Year, OS chips)
      - .filter-toggles (Feature toggles)
   
   5. CONTENT AREA (Line 665-740)
      - .content-area, .content-header
      - .results-info, .sort-group
      - .view-toggle, .active-filters
   
   6. PHONE GRID (Line 745-900)
      - .phone-grid, .phone-card
      - .card-image, .card-info
      - .card-footer, .card-compare-btn
   
   7. PAGINATION (Line 905-930)
      - .pagination, .load-more-btn
   
   8. COMPARE BAR (Line 935-1030)
      - .compare-bar, .compare-phones
      - .compare-thumb, .compare-actions
   
   9. FILTER OVERLAY - MOBILE (Line 1035-1050)
      - .filter-overlay
   
   10. FOOTER (Line 1055-1065)
       - .footer
   
   11. RESPONSIVE (Line 1070-1170)
       - @media (max-width: 1024px)
       - @media (max-width: 768px)
       - @media (max-width: 480px)
   
   12. SKELETON LOADING (Line 1175-end)
       - .skeleton, .skeleton-image, .skeleton-text
   
   ============================================ */

/* === Top Bar === */
.top-bar {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--bg-blur);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: var(--space-3) 0;
}

.top-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.back-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.back-link:hover {
  color: var(--text-primary);
}

.mini-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--text-primary);
}

.mobile-filter-toggle {
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--text-primary);
  font-size: var(--text-sm);
  font-weight: 500;
}

/* === Page Header === */
.page-header {
  padding: var(--space-8) 0 var(--space-6);
  text-align: center;
  border-bottom: 1px solid var(--border-light);
}

.page-title {
  font-size: var(--text-3xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-2);
  background: linear-gradient(180deg, #fff 0%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-subtitle {
  color: var(--text-secondary);
  font-size: var(--text-base);
  margin-bottom: var(--space-6);
}

/* Quick Filter Tags */
.quick-filter-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
}

.quick-tag {
  padding: var(--space-2) var(--space-4);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.quick-tag:hover {
  border-color: var(--accent-primary-border);
  color: var(--text-primary);
  background: rgba(0, 212, 255, 0.1);
}

.quick-tag.active {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #000;
  font-weight: 600;
}

/* === Main Layout === */
.main-layout {
  padding: var(--space-6) 0 var(--space-12);
}

.main-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-8);
  align-items: start;
}

/* === Filter Sidebar === */
.filter-sidebar {
  position: sticky;
  top: 80px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  max-height: calc(100vh - 100px);
  overflow-y: auto;
}

.filter-sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: var(--space-4);
}

.filter-sidebar-title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
}

.filter-close-btn {
  display: none;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  font-size: 1.2rem;
  align-items: center;
  justify-content: center;
}

/* Active Filters */
.active-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.active-filters:empty {
  display: none;
}

.active-filter-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px 4px 12px;
  background: var(--accent-primary-dim);
  border: 1px solid var(--accent-primary-border);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  color: var(--accent-primary);
  font-weight: 500;
}

.active-filter-tag button {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: transparent;
  color: var(--accent-primary);
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.active-filter-tag button:hover {
  background: var(--accent-primary);
  color: #000;
}

/* Filter Group */
.filter-group {
  border-bottom: 1px solid var(--border-light);
  padding-bottom: var(--space-4);
  margin-bottom: var(--space-4);
}

.filter-group:last-of-type {
  border-bottom: none;
  margin-bottom: 0;
}

.filter-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-2) 0;
  background: transparent;
  color: var(--text-primary);
  font-weight: 600;
  font-size: var(--text-sm);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.filter-group-header:hover {
  color: var(--accent-primary);
}

.filter-group-toggle {
  font-size: 10px;
  color: var(--text-muted);
  transition: transform var(--transition-fast);
}

.filter-group[data-collapsed="true"] .filter-group-toggle {
  transform: rotate(-90deg);
}

.filter-group[data-collapsed="true"] .filter-group-content {
  display: none;
}

.filter-group-content {
  padding-top: var(--space-3);
}

/* Filter Search */
.filter-search {
  margin-bottom: var(--space-3);
}

.filter-search-input {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--text-sm);
}

.filter-search-input:focus {
  border-color: var(--accent-primary);
  outline: none;
}

/* Filter Options (Brand List) */
.filter-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.filter-options.scrollable {
  max-height: 320px;
  overflow-y: auto;
  padding-right: var(--space-2);
}

/* 美化滚动条 */
.filter-options.scrollable::-webkit-scrollbar {
  width: 6px;
}

.filter-options.scrollable::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
  border-radius: 3px;
}

.filter-options.scrollable::-webkit-scrollbar-thumb {
  background: var(--accent-primary);
  border-radius: 3px;
  opacity: 0.8;
}

.filter-options.scrollable::-webkit-scrollbar-thumb:hover {
  background: var(--accent-secondary);
}

/* Firefox 滚动条 */
.filter-options.scrollable {
  scrollbar-width: thin;
  scrollbar-color: var(--accent-primary) var(--bg-tertiary);
}

/* 品牌选项 - 标签式设计 */
.filter-option {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  background: var(--bg-tertiary);
  border: 1px solid transparent;
  user-select: none;
}

.filter-option:hover {
  background: var(--bg-elevated);
  border-color: var(--border-hover);
  transform: translateX(2px);
}

.filter-option:active {
  transform: scale(0.98);
}

/* 隐藏原生 checkbox */
.filter-option input[type="checkbox"] {
  display: none;
}

/* 选中状态的勾号图标 */
.filter-option .check-icon {
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

/* 选中状态 */
.filter-option.selected {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
}

.filter-option.selected .filter-option-label {
  color: #000;
  font-weight: 600;
}

.filter-option.selected .filter-option-count {
  color: rgba(0, 0, 0, 0.6);
}

.filter-option.selected .check-icon {
  opacity: 1;
  color: #000;
}

.filter-option-label {
  flex: 1;
  font-size: var(--text-sm);
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.filter-option-count {
  font-size: var(--text-xs);
  color: var(--text-muted);
  font-family: var(--font-mono);
  transition: color var(--transition-fast);
}

/* Filter Chips */
.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.filter-chip {
  padding: var(--space-2) var(--space-3);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: var(--text-xs);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-chip:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.filter-chip.active {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #000;
}

/* Price Range Slider */
.price-range-display {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.price-input-group {
  display: flex;
  align-items: center;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-1) var(--space-2);
  transition: border-color var(--transition-fast);
}

.price-input-group:focus-within {
  border-color: var(--accent-primary);
}

.price-currency {
  color: var(--text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
}

.price-input {
  width: 60px;
  background: transparent;
  border: none;
  color: var(--accent-primary);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  text-align: right;
  padding: var(--space-1);
}

.price-input:focus {
  outline: none;
}

.price-input::-webkit-inner-spin-button,
.price-input::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.price-input[type=number] {
  -moz-appearance: textfield;
}

.price-separator {
  color: var(--text-muted);
  font-size: var(--text-sm);
}

.range-slider-container {
  position: relative;
  height: 24px;
  margin-bottom: var(--space-4);
}

/* 单滑块容器 */
.range-slider-container.single-slider .range-slider {
  pointer-events: all;
}

.range-slider {
  position: absolute;
  width: 100%;
  height: 6px;
  top: 50%;
  transform: translateY(-50%);
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  pointer-events: none;
  z-index: 2;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-primary);
  border: 3px solid var(--bg-primary);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  pointer-events: all;
  transition: transform var(--transition-fast);
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.range-track {
  position: absolute;
  width: 100%;
  height: 6px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--bg-tertiary);
  border-radius: 3px;
}

.range-fill {
  position: absolute;
  height: 100%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 3px;
}

.price-presets {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.price-preset {
  padding: 6px 10px;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: var(--text-xs);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.price-preset:hover {
  border-color: var(--accent-primary-border);
  color: var(--accent-primary);
}

.price-preset.active {
  background: var(--accent-primary-dim);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* Year Range Slider */
.year-range-display {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.year-input-group {
  display: flex;
  align-items: center;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-1) var(--space-2);
  transition: border-color var(--transition-fast);
}

.year-input-group:focus-within {
  border-color: var(--accent-primary);
}

.year-input {
  width: 55px;
  background: transparent;
  border: none;
  color: var(--accent-primary);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  text-align: center;
  padding: var(--space-1);
}

.year-input:focus {
  outline: none;
}

.year-input::-webkit-inner-spin-button,
.year-input::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.year-input[type=number] {
  -moz-appearance: textfield;
}

.year-separator {
  color: var(--text-muted);
  font-size: var(--text-sm);
}

.year-presets {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.year-preset {
  padding: 6px 10px;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: var(--text-xs);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.year-preset:hover {
  border-color: var(--accent-primary-border);
  color: var(--accent-primary);
}

.year-preset.active {
  background: var(--accent-primary-dim);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* Generic Range Filter (Display, RAM, Battery) */
.range-display {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.range-input-group {
  display: flex;
  align-items: center;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-1) var(--space-2);
  transition: border-color var(--transition-fast);
}

.range-input-group:focus-within {
  border-color: var(--accent-primary);
}

.range-input {
  width: 50px;
  background: transparent;
  border: none;
  color: var(--accent-primary);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  text-align: right;
  padding: var(--space-1);
}

.range-input:focus {
  outline: none;
}

.range-input::-webkit-inner-spin-button,
.range-input::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.range-input[type=number] {
  -moz-appearance: textfield;
}

.range-unit {
  color: var(--text-muted);
  font-size: var(--text-xs);
  font-weight: 500;
  margin-left: 2px;
}

.range-separator {
  color: var(--text-muted);
  font-size: var(--text-sm);
}

.range-presets {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.range-preset {
  padding: 6px 10px;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: var(--text-xs);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.range-preset:hover {
  border-color: var(--accent-primary-border);
  color: var(--accent-primary);
}

.range-preset.active {
  background: var(--accent-primary-dim);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* Filter Toggles (Switches) */
.filter-toggles {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.filter-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.filter-toggle:hover {
  background: var(--bg-tertiary);
}

.filter-toggle input {
  display: none;
}

.toggle-switch {
  position: relative;
  width: 36px;
  height: 20px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  transition: all var(--transition-fast);
}

.toggle-switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 14px;
  height: 14px;
  background: var(--text-muted);
  border-radius: 50%;
  transition: all var(--transition-fast);
}

.filter-toggle input:checked + .toggle-switch {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
}

.filter-toggle input:checked + .toggle-switch::after {
  left: 18px;
  background: #fff;
}

.toggle-label {
  font-size: var(--text-sm);
  color: var(--text-primary);
}

/* Filter Actions */
.filter-actions {
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-color);
  margin-top: var(--space-4);
}

.filter-reset-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-3);
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-reset-btn:hover {
  border-color: var(--accent-danger);
  color: var(--accent-danger);
}

/* === Content Area === */
.content-area {
  min-height: 60vh;
}

/* Results Header */
.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-light);
}

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

.results-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.sort-dropdown {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.sort-label {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.sort-select {
  padding: var(--space-2) var(--space-4);
  padding-right: var(--space-8);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
}

.view-toggle {
  display: flex;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.view-btn {
  padding: var(--space-2) var(--space-3);
  background: transparent;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

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

.view-btn.active {
  background: var(--bg-elevated);
  color: var(--accent-primary);
}

/* === Phone Grid === */
.phone-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-5);
}

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

.phone-card {
  position: relative;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.phone-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.phone-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: var(--shadow-xl);
  background: var(--bg-tertiary);
}

.phone-card:hover::before {
  opacity: 1;
}

.card-compare-btn {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.8);
  transition: all var(--transition-bounce);
  backdrop-filter: blur(4px);
  z-index: 2;
}

.phone-card:hover .card-compare-btn {
  opacity: 1;
  transform: scale(1);
}

.card-compare-btn:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #000;
}

.card-compare-btn.active {
  opacity: 1;
  transform: scale(1);
  background: var(--accent-success);
  border-color: var(--accent-success);
  color: #fff;
}

.card-image {
  width: 120px;
  height: 140px;
  object-fit: contain;
  margin: var(--space-2) auto var(--space-3);
  transition: transform var(--transition-normal);
  filter: drop-shadow(0 6px 12px rgba(0,0,0,0.3));
}

.phone-card:hover .card-image {
  transform: scale(1.06) translateY(-4px);
}

.card-name {
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--text-primary);
  margin-bottom: var(--space-1);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  width: 100%;
}

.card-brand {
  font-size: var(--text-xs);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: auto;
  margin-bottom: var(--space-1);
  width: 100%;
}

.card-popularity-bottom {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 10px;
  color: var(--accent-warning);
  font-weight: 600;
  background: rgba(245, 158, 11, 0.1);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  height: 22px;
}

.card-popularity-placeholder {
  height: 22px;
}

.card-price {
  font-weight: 700;
  font-size: var(--text-base);
  color: var(--accent-primary);
  font-family: var(--font-mono);
}

.card-price.no-price {
  color: var(--text-muted);
  font-size: var(--text-xs);
  font-weight: 400;
}

/* === Pagination === */
.pagination {
  margin-top: var(--space-10);
  text-align: center;
}

.load-more-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--text-primary);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.load-more-btn:hover {
  border-color: var(--accent-primary);
  background: var(--accent-primary-dim);
  transform: translateY(-2px);
}

/* === Compare Bar === */
.compare-bar {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(0);
  background: rgba(28, 28, 36, 0.95);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 8px 8px 8px 24px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: var(--space-6);
  z-index: var(--z-sticky);
  transition: all var(--transition-bounce);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.compare-bar.hidden {
  transform: translateX(-50%) translateY(100px);
  opacity: 0;
}

.compare-phones {
  display: flex;
}

.compare-thumb {
  position: relative;
  margin-right: -10px;
  transition: transform var(--transition-fast);
}

.compare-thumb:hover {
  transform: translateY(-4px);
  z-index: 10;
}

.compare-thumb img {
  width: 44px;
  height: 44px;
  object-fit: cover;
  background: #fff;
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-tertiary);
}

.remove-thumb {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 16px;
  height: 16px;
  background: var(--accent-danger);
  color: white;
  border-radius: 50%;
  font-size: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.compare-thumb:hover .remove-thumb {
  opacity: 1;
}

.compare-actions {
  display: flex;
  gap: var(--space-2);
}

.compare-btn {
  padding: 10px 20px;
  background: var(--text-primary);
  color: #000;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
}

.compare-btn:hover {
  transform: translateY(-2px);
}

.clear-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.clear-btn:hover {
  background: var(--accent-danger);
  color: #fff;
}

/* === Filter Overlay (Mobile) === */
.filter-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: calc(var(--z-modal) - 1);
}

.filter-overlay.active {
  display: block;
}

/* === Footer === */
.footer {
  margin-top: auto;
  padding: var(--space-8) 0;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.footer-text {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

/* === Responsive === */
@media (max-width: 1024px) {
  .main-grid {
    grid-template-columns: 1fr;
  }
  
  .filter-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 300px;
    max-height: 100vh;
    border-radius: 0;
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    z-index: var(--z-modal);
  }
  
  .filter-sidebar.active {
    transform: translateX(0);
  }
  
  .filter-close-btn {
    display: flex;
  }
  
  .mobile-filter-toggle {
    display: flex;
  }
}

@media (max-width: 768px) {
  .page-header {
    padding: var(--space-6) 0 var(--space-4);
  }
  
  .page-title {
    font-size: var(--text-2xl);
  }
  
  .quick-filter-tags {
    justify-content: flex-start;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: var(--space-2);
    -webkit-overflow-scrolling: touch;
  }
  
  .quick-tag {
    flex-shrink: 0;
  }
  
  .results-header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .phone-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }
  
  .card-image {
    width: 80px;
    height: 100px;
  }
  
  .card-name {
    font-size: var(--text-xs);
  }
  
  .card-compare-btn {
    opacity: 1;
    width: 28px;
    height: 28px;
  }
  
  .compare-bar {
    bottom: 16px;
    padding: 6px 12px;
    width: 92%;
    max-width: 400px;
    justify-content: space-between;
  }
  
  .compare-thumb img {
    width: 32px;
    height: 32px;
  }
}

@media (max-width: 480px) {
  .phone-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2);
  }
  
  .phone-card {
    padding: var(--space-3);
  }
  
  .card-image {
    width: 70px;
    height: 90px;
  }
}

/* ============ Skeleton Loading ============ */
.phone-card.skeleton {
  pointer-events: none;
}

.phone-card.skeleton .card-compare-btn {
  display: none;
}

.skeleton-image {
  width: 100%;
  height: 180px;
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-elevated) 50%, var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
}

.skeleton-text {
  height: 14px;
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-elevated) 50%, var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-2);
}

/* Brand skeleton */
.skeleton-brand {
  pointer-events: none;
  padding: var(--space-2) var(--space-3);
}

.skeleton-brand .skeleton-text {
  height: 16px;
  margin-bottom: 0;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Loading spinner for Load More button */
.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid var(--text-muted);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}