/* Simplified Design System */
:root {
  /* Simplified Color Palette */
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  
  /* Background Colors */
  --bg: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  
  /* Text Colors */
  --text: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  
  /* Borders */
  --border: #e2e8f0;
  --border-hover: #cbd5e1;
  
  /* Shadows */
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.15);
  
  /* Spacing Scale */
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  
  /* Typography */
  --font-sm: 0.875rem;
  --font-base: 1rem;
  --font-lg: 1.125rem;
  --font-xl: 1.25rem;
  --font-2xl: 1.5rem;
  
  /* Mobile-first font sizes */
  --font-mobile: 18px;
  --font-mobile-sm: 16px;
  --font-mobile-lg: 20px;
  
  /* Touch targets */
  --touch-target: 48px;
  --touch-target-sm: 44px;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --bg: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --border: #334155;
  --border-hover: #475569;
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  font-size: var(--font-mobile);
  line-height: 1.5;
  color: var(--text);
  background-color: var(--bg);
  transition: background-color 0.3s ease, color 0.3s ease;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* App Container */
.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-bottom: 80px; /* Space for fixed cart bar */
  position: relative;
}

/* Floating Dark Mode Toggle */
.floating-dark-mode {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 1000;
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: 50%;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: var(--shadow);
}

.floating-dark-mode:hover {
  background: var(--bg-secondary);
  border-color: var(--border-hover);
  transform: scale(1.05);
}

.dark-mode-icon {
  font-size: 20px;
}

/* Header */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  backdrop-filter: blur(10px);
}

.app-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
}

.dark-mode-toggle {
  background: none;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.dark-mode-toggle:hover {
  background-color: var(--bg-secondary);
  border-color: var(--border-hover);
}

.dark-mode-icon {
  font-size: var(--font-size-lg);
}

/* Main Content */
.main-content {
  flex: 1;
  padding: var(--spacing-md);
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

/* Section Styles */
.section-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

/* Wanted Items Section */
.wanted-items-section {
  margin-bottom: var(--spacing-xl);
}

.wanted-items-container {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  border: 1px solid var(--border-color);
}

.wanted-items-list {
  min-height: 60px;
}

.empty-state {
  text-align: center;
  color: var(--text-muted);
  font-style: italic;
  padding: var(--spacing-lg);
}

.wanted-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md);
  background-color: var(--bg-primary);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
  border: 1px solid var(--border-color);
}

.wanted-item:last-child {
  margin-bottom: 0;
}

.wanted-item-info {
  flex: 1;
}

.wanted-item-name {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.wanted-item-details {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.wanted-item-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.quantity-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.quantity-btn {
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-weight: 600;
  transition: background-color 0.2s ease;
}

.quantity-btn:hover {
  background: var(--primary-hover);
}

.quantity-btn:disabled {
  background: var(--text-muted);
  cursor: not-allowed;
}

.quantity-display {
  min-width: 24px;
  text-align: center;
  font-weight: 600;
}

.remove-item-btn {
  background: var(--error-color);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.remove-item-btn:hover {
  background: #dc2626;
}

.wanted-total {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  font-weight: 600;
  color: var(--text-primary);
}

/* Catalog Section */
.catalog-section {
  margin-bottom: var(--spacing-xl);
}

.catalog-header {
  margin-bottom: var(--spacing-lg);
}

.search-container {
  position: relative;
  margin-bottom: var(--spacing-md);
}

.search-input {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-size: var(--font-size-base);
  transition: border-color 0.2s ease;
}

.search-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgb(37 99 235 / 0.1);
}

.clear-search {
  position: absolute;
  right: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--radius-sm);
  transition: color 0.2s ease;
}

.clear-search:hover {
  color: var(--text-primary);
}

.sort-controls {
  display: flex;
  justify-content: flex-end;
}

.sort-select {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  cursor: pointer;
}

/* Items Grid */
.items-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-md);
}

.item-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
}

.item-card:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.item-card.discounted {
  border-color: var(--success-color);
  background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(16, 185, 129, 0.05) 100%);
}

.item-card.discounted::before {
  content: "💰";
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  font-size: var(--font-size-lg);
}

.item-name {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-base);
}

.item-details {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
}

.item-weight {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.item-price {
  font-weight: 600;
  color: var(--text-primary);
}

.item-price.original {
  text-decoration: line-through;
  color: var(--text-muted);
  margin-right: var(--spacing-xs);
}

.item-price.discounted {
  color: var(--success-color);
}

.item-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.add-item-btn {
  flex: 1;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  padding: var(--spacing-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.add-item-btn:hover {
  background: var(--primary-hover);
}

.discount-btn {
  background: var(--success-color);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  padding: var(--spacing-sm);
  cursor: pointer;
  transition: background-color 0.2s ease;
  min-width: 44px;
}

.discount-btn:hover {
  background: #059669;
}

/* Results Section */
.results-section {
  margin-bottom: var(--spacing-xl);
}

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.results-controls {
  display: flex;
  gap: var(--spacing-sm);
}

.save-favorite-btn,
.share-btn {
  background: var(--secondary-color);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
  font-size: var(--font-size-sm);
  transition: background-color 0.2s ease;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.save-favorite-btn:hover,
.share-btn:hover {
  background: #475569;
}

.save-favorite-btn:disabled,
.share-btn:disabled {
  background: var(--text-muted);
  cursor: not-allowed;
}

.combinations-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.combination-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all 0.2s ease;
}

.combination-card:hover {
  box-shadow: var(--shadow-md);
}

.combination-card.best-match {
  border-color: var(--success-color);
  background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(16, 185, 129, 0.05) 100%);
}

.combination-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.combination-score {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.score-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.score-indicator.excellent {
  background-color: var(--success-color);
}

.score-indicator.good {
  background-color: var(--warning-color);
}

.score-indicator.poor {
  background-color: var(--error-color);
}

.combination-items {
  margin-bottom: var(--spacing-md);
}

.combination-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm);
  background-color: var(--bg-primary);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-xs);
}

.combination-item:last-child {
  margin-bottom: 0;
}

.combination-summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
  font-weight: 600;
}

.weight-difference {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.savings {
  color: var(--success-color);
}

/* Modal Styles */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--spacing-md);
}

.modal {
  background-color: var(--bg);
  border-radius: var(--radius-lg);
  max-width: 400px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: var(--font-size-xl);
  cursor: pointer;
  color: var(--text-muted);
  padding: var(--spacing-xs);
  border-radius: var(--radius-sm);
  transition: color 0.2s ease;
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-content {
  padding: var(--spacing-lg);
  background-color: var(--bg);
}

.discount-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.discount-form label {
  font-weight: 600;
  color: var(--text-primary);
}

.discount-type,
.discount-value {
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-size: var(--font-size-base);
}

.discount-type:focus,
.discount-value:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgb(37 99 235 / 0.1);
}

.discount-preview {
  padding: var(--spacing-md);
  background-color: var(--bg-secondary);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.modal-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
}

.apply-discount-btn {
  flex: 1;
  background: var(--success-color);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.apply-discount-btn:hover {
  background: #059669;
}

.remove-discount-btn {
  background: var(--error-color);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.remove-discount-btn:hover {
  background: #dc2626;
}

/* Loading Overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.8);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  color: white;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top: 4px solid white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: var(--spacing-md);
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Responsive Design */
@media (max-width: 768px) {
  .app-header {
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .app-title {
    font-size: var(--font-size-lg);
  }
  
  .main-content {
    padding: var(--spacing-sm);
  }
  
  .items-grid {
    grid-template-columns: 1fr;
  }
  
  .results-header {
    flex-direction: column;
    align-items: stretch;
  }
  
  .results-controls {
    justify-content: center;
  }
  
  .wanted-item {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-sm);
  }
  
  .wanted-item-controls {
    justify-content: center;
  }
  
  .combination-summary {
    flex-direction: column;
    gap: var(--spacing-sm);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .app-title {
    font-size: var(--font-size-base);
  }
  
  .section-title {
    font-size: var(--font-size-base);
  }
  
  .item-card {
    padding: var(--spacing-sm);
  }
  
  .combination-card {
    padding: var(--spacing-md);
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus styles for keyboard navigation */
button:focus,
input:focus,
select:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --border-color: #000000;
    --text-muted: #666666;
  }
  
  [data-theme="dark"] {
    --border-color: #ffffff;
    --text-muted: #cccccc;
  }
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--primary-color);
  color: white;
  padding: 8px;
  text-decoration: none;
  border-radius: 4px;
  z-index: 1000;
  transition: top 0.3s;
}

.skip-link:focus {
  top: 6px;
}

/* Focus indicators for better accessibility */
*:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ===== SIMPLIFIED DESIGN COMPONENTS ===== */

/* Mobile Tab Navigation */
.mobile-tabs {
  display: flex;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.tab-btn {
  flex: 1;
  padding: var(--space-md);
  background: none;
  border: none;
  font-size: var(--font-base);
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  min-height: var(--touch-target);
}

.tab-btn.active {
  color: var(--primary);
  background: var(--bg);
  border-bottom: 2px solid var(--primary);
}

.tab-btn:hover {
  background: var(--bg-tertiary);
}

/* Tab Content */
.tab-content {
  display: none;
  padding: var(--space-lg);
}

.tab-content.active {
  display: block;
}

/* Simplified Toolbar */
.toolbar {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  align-items: center;
}

.search-container {
  flex: 1;
  position: relative;
}

.search-input {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid var(--border);
  border-radius: 8px;
  font-size: var(--font-base);
  background: var(--bg);
  color: var(--text);
  transition: border-color 0.2s ease;
}

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

.clear-search {
  position: absolute;
  right: var(--space-sm);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: var(--space-xs);
  border-radius: 4px;
  min-width: var(--touch-target-sm);
  min-height: var(--touch-target-sm);
}

.sort-select {
  padding: var(--space-md);
  border: 2px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: var(--font-base);
  cursor: pointer;
  min-width: 120px;
}

/* Discount Mode Toggle */
.discount-mode-toggle {
  margin-bottom: var(--space-lg);
  text-align: center;
}

.discount-mode-btn {
  background: var(--success);
  color: white;
  border: none;
  border-radius: 8px;
  padding: var(--space-md) var(--space-lg);
  font-size: var(--font-base);
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s ease;
  min-height: var(--touch-target);
}

.discount-mode-btn:hover {
  background: #059669;
}

.discount-mode-btn.active {
  background: var(--error);
}

/* Add Custom Item Section */
.add-custom-section {
  margin-top: var(--space-xl);
  text-align: center;
  padding: var(--space-lg);
  border: 2px dashed var(--border);
  border-radius: 12px;
  background: var(--bg-secondary);
}

.add-custom-btn {
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 8px;
  padding: var(--space-md) var(--space-lg);
  font-size: var(--font-base);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  min-height: var(--touch-target);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  margin: 0 auto;
}

.add-custom-btn:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

/* Simplified Item Cards */
.items-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

.item-card {
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: var(--space-lg);
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
}

.item-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.item-card.discounted {
  border-color: var(--success);
  background: linear-gradient(135deg, var(--bg) 0%, rgba(16, 185, 129, 0.05) 100%);
}

.item-card.discounted::before {
  content: "💰";
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  font-size: var(--font-lg);
}

.item-name {
  font-weight: 600;
  color: var(--text);
  margin-bottom: var(--space-sm);
  font-size: var(--font-lg);
}

.item-details {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-md);
}

.item-weight {
  color: var(--text-secondary);
  font-size: var(--font-sm);
}

.item-price {
  font-weight: 600;
  color: var(--text);
  font-size: var(--font-lg);
}

.item-price.original {
  text-decoration: line-through;
  color: var(--text-muted);
  margin-right: var(--space-xs);
  font-size: var(--font-sm);
}

.item-price.discounted {
  color: var(--success);
}

.add-item-btn {
  width: 100%;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 8px;
  padding: var(--space-md);
  font-size: var(--font-base);
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s ease;
  min-height: var(--touch-target);
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.add-item-btn:hover {
  background: var(--primary-hover);
}

/* Fixed Bottom Cart Bar */
.fixed-cart-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg);
  border-top: 2px solid var(--border);
  padding: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  z-index: 100;
  box-shadow: var(--shadow-lg);
}

.cart-summary {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex: 1;
}

.cart-icon {
  font-size: var(--font-xl);
}

.cart-info {
  flex: 1;
}

.cart-count {
  font-weight: 600;
  color: var(--text);
  font-size: var(--font-base);
}

.cart-total {
  color: var(--text-secondary);
  font-size: var(--font-sm);
}

/* Mobile-specific touch improvements */
.quantity-btn, .remove-item-btn {
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  min-width: var(--touch-target-sm);
  min-height: var(--touch-target-sm);
}

.quantity-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* No Results Message */
.no-results {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--text-secondary);
}

.no-results-icon {
  font-size: 3rem;
  margin-bottom: var(--space-md);
}

.no-results h3 {
  color: var(--text);
  margin-bottom: var(--space-sm);
}

.no-results p {
  color: var(--text-secondary);
  font-size: var(--font-sm);
}

/* Primary and Secondary Buttons */
.primary-btn {
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 8px;
  padding: var(--space-md) var(--space-lg);
  font-size: var(--font-base);
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s ease;
  min-height: var(--touch-target);
  min-width: 120px;
}

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

.primary-btn:disabled {
  background: var(--text-muted);
  cursor: not-allowed;
}

.secondary-btn {
  background: var(--bg-secondary);
  color: var(--text);
  border: 2px solid var(--border);
  border-radius: 8px;
  padding: var(--space-md) var(--space-lg);
  font-size: var(--font-base);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  min-height: var(--touch-target);
}

.secondary-btn:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-hover);
}

.action-btn {
  background: var(--bg-secondary);
  color: var(--text);
  border: 2px solid var(--border);
  border-radius: 8px;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  min-height: var(--touch-target-sm);
}

.action-btn:hover {
  background: var(--bg-tertiary);
}

.action-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Simplified Cart Content */
.cart-content {
  min-height: 300px;
}

.empty-state {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--text-muted);
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: var(--space-md);
}

.empty-state h3 {
  font-size: var(--font-xl);
  margin-bottom: var(--space-sm);
  color: var(--text);
}

.empty-state p {
  font-size: var(--font-base);
}

/* Simplified Results */
.results-section {
  margin-top: var(--space-xl);
}

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.results-header h2 {
  font-size: var(--font-xl);
  font-weight: 600;
  color: var(--text);
}

.results-controls {
  display: flex;
  gap: var(--space-sm);
}

.combinations-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.combination-card {
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: var(--space-lg);
  transition: all 0.2s ease;
}

.combination-card:hover {
  box-shadow: var(--shadow);
}

.combination-card.best-match {
  border-color: var(--success);
  background: linear-gradient(135deg, var(--bg) 0%, rgba(16, 185, 129, 0.05) 100%);
}

.combination-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-md);
}

.combination-score {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-weight: 600;
}

.score-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.score-indicator.excellent {
  background: var(--success);
}

.score-indicator.good {
  background: var(--warning);
}

.score-indicator.poor {
  background: var(--error);
}

.combination-items {
  margin-bottom: var(--space-md);
}

.combination-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm);
  background: var(--bg-secondary);
  border-radius: 6px;
  margin-bottom: var(--space-xs);
}

.combination-item:last-child {
  margin-bottom: 0;
}

.combination-summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-md);
  border-top: 1px solid var(--border);
  font-weight: 600;
}

.savings {
  color: var(--success);
}

/* Simplified Modal */
.simple-modal {
  max-width: 400px;
  width: 90%;
}

.discount-input-group {
  display: flex;
  align-items: center;
  margin-bottom: var(--space-lg);
}

.discount-input {
  flex: 1;
  padding: var(--space-md);
  border: 2px solid var(--border);
  border-radius: 8px 0 0 8px;
  font-size: var(--font-lg);
  text-align: center;
}

.discount-suffix {
  padding: var(--space-md);
  background: var(--bg-secondary);
  border: 2px solid var(--border);
  border-left: none;
  border-radius: 0 8px 8px 0;
  color: var(--text-secondary);
  font-weight: 600;
}

.discount-preview {
  padding: var(--space-md);
  background: var(--bg-secondary);
  border-radius: 8px;
  margin-bottom: var(--space-lg);
  text-align: center;
  font-size: var(--font-sm);
  color: var(--text-secondary);
}

.modal-actions {
  display: flex;
  gap: var(--space-sm);
}

.modal-actions .primary-btn,
.modal-actions .secondary-btn {
  flex: 1;
}

/* Custom Item Modal Styles */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: 600;
  color: var(--text);
}

.form-input {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid var(--border);
  border-radius: 8px;
  font-size: var(--font-base);
  background: var(--bg);
  color: var(--text);
  transition: border-color 0.2s ease;
}

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

/* Custom Item Card Styling */
.item-card.custom-item {
  border-color: var(--primary);
  background: linear-gradient(135deg, var(--bg) 0%, rgba(37, 99, 235, 0.05) 100%);
}

.item-card.custom-item::before {
  content: "⭐";
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  font-size: var(--font-lg);
}

/* Responsive Design */
@media (min-width: 768px) {
  .items-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .toolbar {
    flex-direction: row;
  }
  
  .search-container {
    max-width: 400px;
  }
  
}

@media (min-width: 1024px) {
  .items-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .mobile-tabs {
    display: none;
  }
  
  .tab-content {
    display: block;
  }
  
  .app-container {
    padding-bottom: 0;
  }
  
  .fixed-cart-bar {
    display: none;
  }
  
  .main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-xl);
  }
  
  .browse-tab {
    grid-column: 1;
  }
  
  .cart-tab {
    grid-column: 2;
  }
  
  .results-section {
    grid-column: 1 / -1;
  }
  
  .add-custom-section {
    margin-top: var(--space-lg);
  }
  
  .floating-dark-mode {
    bottom: 30px;
    right: 30px;
  }
}

@media (min-width: 1200px) {
  .items-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}