:root {
  --primary-color: #6366f1;
  --primary-hover: #4f46e5;
  --primary-gradient: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
  --bg-color: #f0f2f8;
  --card-bg: #fff;
  --text-dark: #1e293b;
  --text-light: #64748b;
  --border-color: #e2e8f0;
  --success-color: #10b981;
  --success-gradient: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --header-height: 68px;
  --cart-width: 360px;
  --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.06), 0 1px 2px -1px rgb(0 0 0 / 0.06);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.08), 0 2px 4px -2px rgb(0 0 0 / 0.06);
  --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.08), 0 8px 10px -6px rgb(0 0 0 / 0.04);
  --shadow-xl: 0 25px 50px -12px rgb(0 0 0 / 0.15);
  --radius: 16px;
  --radius-sm: 10px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: Inter, system-ui, -apple-system, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

body {
  background-color: var(--bg-color);
  color: var(--text-dark);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Header */
.pos-header {
  height: var(--header-height);
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  border-bottom: 1px solid rgb(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  z-index: 10;
  box-shadow: 0 4px 20px rgb(0,0,0,0.15);
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.brand-logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: rgb(255,255,255,0.85);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  letter-spacing: -0.5px;
}

.brand-logo i {
  background: linear-gradient(135deg, #38bdf8, #6366f1);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: 1.3rem;
}

.brand-gradient {
  background: linear-gradient(90deg, #38bdf8, #6366f1, #f472b6, #f59e0b, #38bdf8);
  background-size: 200% 200%;
  -webkit-text-fill-color: transparent;
  -webkit-background-clip: text;
          background-clip: text;
  font-weight: 900;
  filter: drop-shadow(0 2px 8px rgb(245,158,11,0.3));
  animation: brandGradientShift 4s ease-in-out infinite;
}

@keyframes brandGradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.store-selector {
  background: rgb(255,255,255,0.08);
  padding: 0.55rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.85rem;
  color: rgb(255,255,255,0.85);
  border: 1px solid rgb(255,255,255,0.1);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  gap: 8px;
}

.store-selector:hover {
  background: rgb(255,255,255,0.14);
  border-color: rgb(255,255,255,0.2);
  color: white;
  transform: translateY(-1px);
}

/* Custom Currency Dropdown */
.currency-dropdown {
  position: relative;
  min-width: 140px;
}

.dropdown-trigger {
  background: #f8fafc;
  padding: 0.6rem 1rem;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-dark);
  border: 1px solid var(--border-color);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  transition: all 0.2s;
}

.dropdown-trigger:hover {
  background: white;
  border-color: var(--primary-color);
  box-shadow: 0 4px 12px rgb(99, 102, 241, 0.15);
}

.dropdown-menu {
  position: absolute;
  top: 110%;
  left: 0;
  background: white;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  width: 280px;
  max-height: 300px;
  overflow-y: auto;
  z-index: 1000;
  display: none;
  animation: fadeIn 0.15s ease-out;
}

.dropdown-menu.active {
  display: block;
}

.dropdown-item {
  padding: 0.75rem 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-dark);
  transition: background 0.15s;
}

.dropdown-item:hover {
  background: #f1f5f9;
  color: var(--primary-color);
}

.dropdown-item.selected {
  background: #e0e7ff;
  color: var(--primary-color);
  font-weight: 700;
}

.dropdown-search {
  padding: 0.8rem;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  background: white;
  z-index: 10;
}

.dropdown-search input {
  width: 100%;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 0.85rem;
  outline: none;
}

.dropdown-search input:focus {
  border-color: var(--primary-color);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Scrollbar for dropdown */
.dropdown-menu::-webkit-scrollbar {
  width: 6px;
}

.dropdown-menu::-webkit-scrollbar-track {
  background: transparent;
}

.dropdown-menu::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 10px;
}

.header-search {
  flex: 1;
  max-width: 500px;
  margin: 0 2rem;
  position: relative;
}

.search-input {
  width: 100%;
  padding: 0.75rem 1.2rem 0.75rem 2.8rem;
  border-radius: 99px;
  border: 1px solid rgb(255,255,255,0.1);
  background: rgb(255,255,255,0.07);
  font-size: 0.9rem;
  outline: none;
  transition: all 0.25s;
  color: white;
  box-shadow: none;
}

.search-input::-moz-placeholder {
  color: rgb(255,255,255,0.4);
}

.search-input::placeholder {
  color: rgb(255,255,255,0.4);
}

.search-input:focus {
  background: rgb(255,255,255,0.12);
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgb(99, 102, 241, 0.2);
}

.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: rgb(255,255,255,0.4);
  font-size: 0.95rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.action-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid rgb(255,255,255,0.08);
  background: rgb(255,255,255,0.05);
  color: rgb(255,255,255,0.6);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  transition: all 0.2s;
}

.action-btn:hover {
  background: rgb(255,255,255,0.12);
  color: white;
  border-color: rgb(255,255,255,0.15);
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.35rem 0.7rem 0.35rem 0.35rem;
  border-radius: 99px;
  cursor: pointer;
  background: rgb(255,255,255,0.06);
  border: 1px solid rgb(255,255,255,0.08);
  transition: all 0.2s;
}

.user-profile span {
  color: rgb(255,255,255,0.85);
}

.user-profile:hover {
  background: rgb(255,255,255,0.1);
  border-color: rgb(255,255,255,0.15);
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 0.95rem;
  box-shadow: 0 4px 10px rgb(99, 102, 241, 0.3);
}

/* Layout */
.pos-layout {
  display: flex;
  height: calc(100vh - var(--header-height));
  position: relative;
}

/* Catalog Section (Left) */
.catalog-section {
  flex: 1;
  min-width: 0;          /* allow flex child to shrink below content size */
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg-color);
  position: relative;
  z-index: 1;
}

.category-tabs {
  padding: 0.35rem 1.5rem 0.75rem;
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  background: transparent;
}

.cat-tab {
  padding: 0.6rem 1.2rem;
  border-radius: 99px;
  background: white;
  color: var(--text-light);
  font-weight: 600;
  font-size: 0.85rem;
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.cat-tab i {
  font-size: 0.8rem;
  opacity: 0.6;
}

.cat-tab .cat-count {
  background: #f1f5f9;
  color: var(--text-light);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 99px;
  min-width: 22px;
  text-align: center;
  transition: all 0.2s;
}

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

.cat-tab:hover i { opacity: 1; }

.cat-tab.active {
  background: var(--primary-gradient);
  color: white;
  border-color: transparent;
  box-shadow: 0 6px 18px rgb(99, 102, 241, 0.35);
}

.cat-tab.active i { opacity: 1; }

.cat-tab.active .cat-count {
  background: rgb(255,255,255,0.25);
  color: white;
}

.product-grid {
  flex: 1;
  padding: 1rem 1.5rem 1.5rem;
  overflow-y: auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(185px, 1fr));
  gap: 1.1rem;
  align-content: start;
}

/* Grouped (All Items) layout */
.product-grid.grouped {
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
}

.category-group-header {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 0.85rem;
  padding-bottom: 0.6rem;
  border-bottom: 2px solid var(--border-color);
}

.cg-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.8rem;
  flex-shrink: 0;
  box-shadow: 0 3px 8px rgb(99,102,241,0.25);
}

.cg-label {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-dark);
  letter-spacing: -0.2px;
}

.cg-count {
  margin-left: auto;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-light);
  background: #f1f5f9;
  padding: 0.2rem 0.65rem;
  border-radius: 99px;
}

.product-subgrid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(185px, 1fr));
  gap: 1.1rem;
}

/* Custom scrollbar for product grid */
.product-grid::-webkit-scrollbar { width: 6px; }
.product-grid::-webkit-scrollbar-track { background: transparent; }
.product-grid::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 99px; }

.product-card {
  background: white;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  position: relative;
  animation: cardIn 0.35s ease both;
}

@keyframes cardIn {
  from { opacity: 0; transform: translateY(12px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgb(99, 102, 241, 0.2);
}

.product-card:hover .card-add-overlay {
  opacity: 1;
  transform: translateY(0);
}

.product-card:active {
  transform: translateY(-2px) scale(0.98);
}

.card-add-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--primary-gradient);
  color: white;
  font-weight: 700;
  font-size: 0.85rem;
  text-align: center;
  padding: 0.65rem;
  opacity: 0;
  transform: translateY(100%);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  letter-spacing: 0.3px;
}

.product-image {
  height: 130px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  border-bottom: 1px solid #f1f5f9;
}

.product-icon {
  font-size: 2.8rem;
  opacity: 0.85;
  transition: all 0.3s;
  filter: drop-shadow(0 4px 12px rgb(0,0,0,0.08));
}

.product-card:hover .product-icon {
  transform: scale(1.12);
  opacity: 1;
}

.product-price-badge {
  position: absolute;
  top: 0.7rem;
  right: 0.7rem;
  background: white;
  padding: 0.3rem 0.65rem;
  border-radius: 8px;
  font-weight: 800;
  color: var(--primary-color);
  font-size: 0.85rem;
  box-shadow: 0 2px 10px rgb(0,0,0,0.06);
  border: 1px solid #f1f5f9;
}

.product-details {
  padding: 0.9rem 1rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-name {
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 0.4rem;
  line-height: 1.35;
  font-size: 0.92rem;
}

.product-meta {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--text-light);
  font-weight: 500;
}

.cat-label {
  display: flex;
  align-items: center;
  gap: 3px;
  opacity: 0.7;
  text-transform: capitalize;
}

.cat-label i { font-size: 0.65rem; }

.stock-tag {
  color: var(--success-color);
  background: #ecfdf5;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stock-tag.low {
  color: var(--warning-color);
  background: #fffbeb;
}

/* Cart Section (Right) */
.cart-section {
  width: var(--cart-width);
  flex-shrink: 0;        /* prevent cart from shrinking into catalog area */
  background: white;
  display: flex;
  flex-direction: column;
  box-shadow: -4px 0 30px rgb(0,0,0,0.04);
  border-left: 1px solid var(--border-color);
  position: relative;
  z-index: 2;            /* only needs to be above catalog (z-index:1) for shadow */
  min-height: 0;
  overflow: hidden;
}

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

.cart-header .action-btn {
  background: #f1f5f9;
  color: var(--text-light);
  border-color: var(--border-color);
}

.cart-header .action-btn:hover {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.customer-select {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.7rem 0.9rem;
  background: #f8fafc;
  border-radius: var(--radius-sm);
  width: 100%;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s;
}

.customer-select:hover {
  background: white;
  border-color: var(--primary-color);
  box-shadow: 0 4px 12px rgb(99, 102, 241, 0.1);
}

.customer-icon {
  width: 34px;
  height: 34px;
  background: #eff6ff;
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  font-size: 0.9rem;
}

.cart-items-container {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  padding: 0;
  background: white;
  -webkit-overflow-scrolling: touch;
  position: relative;
  z-index: 1;
}

.cart-items-container::-webkit-scrollbar { width: 4px; }
.cart-items-container::-webkit-scrollbar-track { background: transparent; }
.cart-items-container::-webkit-scrollbar-thumb { background: #e2e8f0; border-radius: 99px; }

.cart-empty-state {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #94a3b8;
  gap: 0.8rem;
  opacity: 0.6;
}

.cart-empty-state i { font-size: 2.5rem; }
.cart-empty-state p { font-size: 0.9rem; font-weight: 500; }

.cart-item {
  display: flex;
  align-items: center;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid #f8fafc;
  gap: 0.8rem;
  transition: background 0.2s;
  animation: slideIn 0.2s ease;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(15px); }
  to { opacity: 1; transform: translateX(0); }
}

.cart-item:hover {
  background-color: #fafbfe;
}

.item-qty-control {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  background: #f1f5f9;
  padding: 0.2rem;
  border-radius: 99px;
  height: 90px;
  justify-content: space-between;
}

.qty-btn {
  width: 26px;
  height: 26px;
  border: none;
  background: white;
  border-radius: 50%;
  cursor: pointer;
  color: var(--text-dark);
  box-shadow: 0 1px 4px rgb(0,0,0,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  transition: all 0.2s;
}

.qty-btn:hover {
  background: var(--primary-color);
  color: white;
  transform: scale(1.1);
}

.item-qty-input {
  width: 22px;
  text-align: center;
  border: none;
  background: transparent;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-dark);
}

.item-info {
  flex: 1;
  min-width: 0;
}

.item-name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-dark);
  margin-bottom: 0.2rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.item-price {
  color: var(--text-light);
  font-size: 0.8rem;
  font-weight: 500;
}

.item-total {
  font-weight: 800;
  font-size: 1rem;
  color: var(--primary-color);
  min-width: 70px;
  text-align: right;
}

.item-remove {
  color: #ef4444;
  opacity: 0.2;
  cursor: pointer;
  padding: 0.4rem;
  transition: all 0.2s;
  font-size: 0.85rem;
}

.item-remove:hover {
  opacity: 1;
  background: #fef2f2;
  border-radius: 8px;
}

.cart-summary {
  padding: 1.25rem;
  background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
  border-top: 1px solid var(--border-color);
}

.summary-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.6rem;
  font-size: 0.9rem;
  color: var(--text-light);
  font-weight: 500;
}

.summary-row.total {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 2px dashed #cbd5e1;
  color: var(--text-dark);
  font-weight: 900;
  font-size: 1.4rem;
  align-items: flex-end;
}

.cart-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  padding: 1.25rem;
  background: white;
  border-top: 1px solid var(--border-color);
}

.cart-btn {
  padding: 0.9rem;
  border-radius: var(--radius-sm);
  border: none;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  letter-spacing: 0.3px;
}

.btn-suspend {
  background: #f1f5f9;
  color: #64748b;
  border: 1px solid var(--border-color);
}

.btn-suspend:hover {
  background: #e2e8f0;
  color: #334155;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.btn-pay {
  grid-column: span 2;
  background: var(--success-gradient);
  color: white;
  box-shadow: 0 6px 20px -4px rgb(16, 185, 129, 0.4);
  font-size: 1rem;
  padding: 1rem;
  border-radius: var(--radius);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.btn-pay:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px -6px rgb(16, 185, 129, 0.5);
}

.btn-cancel {
  background: #fff1f2;
  color: #e11d48;
  border: 1px solid #fecdd3;
}

.btn-cancel:hover {
  background: #ffe4e6;
  color: #be123c;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgb(15, 23, 42, 0.6);
          -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s;
}

.modal-overlay.active {
  display: flex;
  opacity: 1;
}

.modal-container {
  background: white;
  border-radius: 20px;
  width: 90%;
  max-width: 520px;
  padding: 2rem;
  box-shadow: var(--shadow-xl);
  transform: scale(0.95) translateY(20px);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.active .modal-container {
  transform: scale(1) translateY(0);
}

.modal-header h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  text-align: center;
  color: var(--text-dark);
}

.payment-methods {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 2rem;
}

.payment-method-card {
  padding: 1.5rem 1.2rem;
  border: 2px solid #e2e8f0;
  border-radius: var(--radius);
  text-align: center;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  background: #f8fafc;
  position: relative;
  overflow: hidden;
}

.payment-method-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--primary-gradient);
  opacity: 0;
  transition: opacity 0.25s;
}

.payment-method-card:hover {
  border-color: var(--primary-color);
  background: white;
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgb(99, 102, 241, 0.15);
}

.payment-method-card:hover::before {
  opacity: 0.04;
}

.payment-method-card i {
  font-size: 2rem;
  margin-bottom: 0.75rem;
  display: block;
  color: var(--text-light);
  transition: all 0.2s;
  position: relative;
}

.payment-method-card:hover i {
  color: var(--primary-color);
  transform: scale(1.1);
}

.payment-method-card span {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-dark);
  position: relative;
}

/* Currency Modal Styles */
.currency-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px;
  max-height: 400px;
  overflow-y: auto;
  padding: 4px;
  margin-top: 1.5rem;
}

.currency-option-card {
  padding: 1rem;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  cursor: pointer;
  background: white;
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

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

.currency-option-card.active {
  background: #eff6ff;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgb(99, 102, 241, 0.2);
}

.currency-code {
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--primary-color);
  margin-bottom: 0.25rem;
}

.currency-name {
  font-size: 0.8rem;
  color: var(--text-light);
  line-height: 1.3;
}

/* Scrollbar specific for modal grid */
.currency-grid::-webkit-scrollbar {
  width: 8px;
}

.currency-grid::-webkit-scrollbar-track {
  background: #f1f5f9;
  border-radius: 4px;
}

.currency-grid::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 4px;
}

/* Keyboard Shortcuts Hint */
.shortcut-hint {
  position: absolute;
  bottom: 0.5rem;
  right: 0.5rem;
  font-size: 0.75rem;
  color: #94a3b8;
  background: rgb(255,255,255,0.8);
  padding: 2px 6px;
  border-radius: 4px;
  pointer-events: none;
}

/* Responsive adjustments */
@media (width <= 1100px) {
  .product-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }
}

@media (width <= 900px) {
  .pos-layout {
    flex-direction: column;
  }

  .cart-section {
    width: 100%;
    height: 55vh;
    border-top: 1px solid var(--border-color);
    border-left: none;
    box-shadow: 0 -10px 40px rgb(0,0,0,0.08);
    position: relative;
    z-index: 50;
    transition: box-shadow 0.25s ease, transform 0.25s ease;
  }

  .cart-section.cart-highlight {
    box-shadow: 0 -12px 48px rgb(244,63,94,0.35);
    transform: translateY(-2px);
  }

  .cart-section.cart-open-mobile {
    scroll-margin-bottom: 1rem;
  }

  .catalog-section {
    height: 45vh;
  }

  .header-search {
    margin: 0 1rem;
    max-width: 300px;
  }
}

@media (width <= 768px) {
  .product-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
  .cart-section { height: 50vh; }
  .catalog-section { height: 50vh; }

  .pos-header,
  .pos-topbar {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .brand-section,
  .pos-currency-wrapper,
  .store-selector {
    min-width: 0;
    flex: 1 1 auto;
  }

  .pos-layout,
  .pos-container,
  .pos-app {
    overflow-x: hidden;
    max-width: 100vw;
  }

  #ordersPanel.orders-panel:not(.open),
  .orders-panel:not(.open) {
    right: -100%;
    visibility: hidden;
    pointer-events: none;
  }
}

@media (width <= 600px) {
  .header-actions { display: none; }
  .header-search { display: none; }
  .cat-tab { padding: 0.5rem 0.8rem; font-size: 0.8rem; }
  .product-grid { padding: 0.75rem; gap: 0.75rem; }
  .cart-item { padding: 0.8rem; }
  .item-qty-control { height: auto; flex-direction: row; gap: 8px; width: 90px; padding: 4px; }
  .cart-header { padding: 0.8rem; }
  .cart-summary { padding: 0.8rem; }
  .card-add-overlay { opacity: 1; transform: translateY(0); font-size: 0.75rem; padding: 0.5rem; }
}

/* ═══ MOBILE OVERRIDES — POS-specific ═══ */
@media (width <= 480px) {
  .payment-methods {
    grid-template-columns: 1fr !important;
  }
}

.pos-status-banner {
  position: sticky;
  top: 0;
  z-index: 200;
  padding: 0.55rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  text-align: center;
}

.pos-status-warning { background: #fef3c7; color: #92400e; }
.pos-status-error { background: #fee2e2; color: #991b1b; }
.pos-status-info { background: #e0f2fe; color: #075985; }

.pos-toast {
  position: fixed;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%) translateY(120%);
  background: #0f172a;
  color: #fff;
  padding: 0.75rem 1.25rem;
  border-radius: 10px;
  z-index: 500;
  opacity: 0;
  transition: transform 0.25s ease, opacity 0.25s ease;
  max-width: 90vw;
}

.pos-toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }
.pos-toast-warning { background: #b45309; }

.product-card.out-of-stock { opacity: 0.55; cursor: not-allowed; }
.stock-tag.out { background: #fee2e2; color: #b91c1c; }

.cart-btn.btn-done {
  background: linear-gradient(135deg, var(--primary-color), #4f46e5);
  color: #fff;
}

.cart-btn.btn-pay.disabled,
.cart-btn.btn-pay:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

.orders-panel {
  position: fixed;
  top: 0;
  right: -100%;
  width: min(360px, 92vw);
  height: 100vh;
  background: #fff;
  border-left: 1px solid var(--border-color);
  box-shadow: -8px 0 30px rgb(0 0 0 / 8%);
  z-index: 300;
  transition: right 0.25s ease, visibility 0.25s ease;
  display: flex;
  flex-direction: column;
  visibility: hidden;
  pointer-events: none;
}

/* Keep live-chat below cart/checkout so checkout is never obstructed */
.erp-live-chat-launcher,
#erpChatLauncher,
.erp-chat-widget {
  z-index: 120 !important;
}

.orders-panel.open {
  right: 0;
  visibility: visible;
  pointer-events: auto;
}

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

.orders-panel-body { padding: 1rem; overflow-y: auto; flex: 1; }

.orders-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid #f1f5f9;
}

.orders-total { font-weight: 700; color: #0f172a; }
.orders-empty { color: #64748b; font-size: 0.9rem; }

.customer-options { display: grid; gap: 0.5rem; max-height: 320px; overflow-y: auto; }

.customer-pick {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  gap: 0.15rem;
}

.customer-pick small { font-size: 0.75rem; opacity: 0.75; font-weight: 400; }

.settings-form { display: grid; gap: 0.5rem; }
.settings-form label { font-size: 0.8rem; font-weight: 600; color: #475569; margin-top: 0.35rem; }
.settings-form .search-input,
.settings-form input,
.settings-form select {
  color: #0f172a;
  background: #fff;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  padding: 0.65rem 0.85rem;
}
.settings-form .search-input::placeholder { color: #94a3b8; }

.orders-panel-tabs {
  display: flex;
  gap: 0.35rem;
  padding: 0 1rem 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.orders-tab {
  flex: 1;
  border: none;
  background: #f1f5f9;
  color: #475569;
  padding: 0.45rem 0.5rem;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
}

.orders-tab.active { background: var(--primary-color); color: #fff; }

.orders-date-filters {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid #f1f5f9;
}

.orders-tab-panel { display: none; }
.orders-tab-panel.active { display: block; }

.report-summary { display: grid; gap: 0.65rem; }
.report-kpi {
  display: flex;
  justify-content: space-between;
  padding: 0.65rem 0.75rem;
  background: #f8fafc;
  border-radius: 8px;
  font-size: 0.9rem;
}

.report-kpi strong { color: #0f172a; }

.held-row { align-items: center; }