/* 
   Pegas (Pvt) Ltd - POS System Stylesheet
   Location: Kinniya, Trincomalee, Sri Lanka
   Clean, Official, Corporate & Professional White UI Theme
*/

:root {
  --primary: #1e40af;           /* Corporate Deep Royal Blue */
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --secondary: #0f766e;         /* Subtle Teal Accent */
  
  --success: #059669;           /* Muted Emerald */
  --success-bg: #ecfdf5;
  --warning: #d97706;           /* Corporate Amber */
  --warning-bg: #fffbeb;
  --danger: #dc2626;            /* Subtle Crimson */
  --danger-bg: #fef2f2;
  
  --bg-dark: #f8fafc;           /* Crisp Light Background */
  --bg-card: #ffffff;           /* Clean Pure White Cards */
  --bg-card-hover: #f1f5f9;
  --bg-input: #ffffff;
  --border-color: #cbd5e1;
  --border-light: #e2e8f0;
  
  --text-main: #0f172a;         /* Deep Slate Dark Text */
  --text-muted: #64748b;        /* Soft Muted Text */
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 20px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
  
  --transition: all 0.18s ease-in-out;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* Official Clean Top Header */
.app-header {
  background: #ffffff;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0.75rem 1.5rem;
  box-shadow: var(--shadow-sm);
}

.header-container {
  max-width: 1440px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

/* Logo - Matching Main Website Style */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  cursor: pointer;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.logo:hover {
  transform: translateY(-1px);
}

.logo-icon {
  width: 90px;
  height: 44px;
  border-radius: 6px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: filter 0.2s ease;
}

.logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.logo-text {
  font-size: 26px;
  font-weight: 800;
  color: #1a7cff;
  letter-spacing: -0.02em;
  line-height: 1;
}

.logo-superscript {
  font-size: 13px;
  vertical-align: super;
  font-weight: 700;
  color: #64748b;
  margin-left: 3px;
  letter-spacing: 0.04em;
}

/* App Main Navigation Tabs - Clean Segmented Control */
.nav-tabs {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: #f1f5f9;
  padding: 3px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.15rem;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.88rem;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.tab-btn i {
  font-size: 0.95rem;
}

.tab-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.6);
}

.tab-btn.active {
  background: #ffffff;
  color: var(--primary);
  font-weight: 700;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  border: 1px solid var(--border-light);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theme-toggle-btn, .back-site-btn {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: #ffffff;
  color: var(--text-main);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.theme-toggle-btn:hover, .back-site-btn:hover {
  background: #f1f5f9;
  border-color: var(--primary);
  color: var(--primary);
}

/* Main Layout Container */
.main-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 1.5rem;
  width: 100%;
  flex: 1;
}

/* Tab Views */
.tab-content {
  display: none;
  animation: fadeIn 0.2s ease-out;
}

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

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* =========================================
   TAB 1: INVOICE GENERATOR / POS HOME PAGE
   ========================================= */
.pos-grid {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 1.5rem;
  align-items: start;
}

@media (max-width: 1024px) {
  .pos-grid {
    grid-template-columns: 1fr;
  }
}

/* POS Catalog Section */
.pos-catalog {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.catalog-header {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  box-shadow: var(--shadow-sm);
}

.customer-select-box {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.customer-select-box label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.customer-row {
  display: flex;
  gap: 0.75rem;
}

.select-wrapper {
  position: relative;
  flex: 1;
}

.select-wrapper i {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--primary);
  font-size: 0.9rem;
}

.form-select, .form-input {
  width: 100%;
  padding: 0.65rem 0.85rem 0.65rem 2.5rem;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 0.9rem;
  font-family: inherit;
  outline: none;
  transition: var(--transition);
}

.form-select:focus, .form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.quick-add-btn {
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid rgba(30, 64, 175, 0.3);
  padding: 0 1rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition);
  white-space: nowrap;
}

.quick-add-btn:hover {
  background: var(--primary);
  color: #ffffff;
}

/* Selected Customer Stats Chip */
.customer-detail-chip {
  background: #f8fafc;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.85rem;
}

.customer-chip-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.customer-avatar {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-full);
  background: var(--primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}

.customer-credit-tag {
  background: var(--warning-bg);
  color: var(--warning);
  border: 1px solid rgba(217, 119, 6, 0.3);
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.82rem;
}

/* Product Search Bar */
.product-search-row {
  display: flex;
  gap: 0.75rem;
}

.search-input-wrapper {
  position: relative;
  flex: 1;
}

.search-input-wrapper i {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.search-input-wrapper input {
  padding-left: 2.5rem;
}

/* Products Grid */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.product-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.75rem;
  transition: var(--transition);
  position: relative;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

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

.product-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.5rem;
}

.product-name {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
}

.stock-badge {
  font-size: 0.7rem;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  font-weight: 700;
  white-space: nowrap;
}

.stock-badge.in-stock {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid rgba(5, 150, 105, 0.3);
}

.stock-badge.low-stock {
  background: var(--warning-bg);
  color: var(--warning);
  border: 1px solid rgba(217, 119, 6, 0.3);
}

.stock-badge.out-stock {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid rgba(220, 38, 38, 0.3);
}

.product-card-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.25rem;
  padding-top: 0.5rem;
  border-top: 1px dashed var(--border-light);
}

.product-price {
  font-size: 1rem;
  font-weight: 800;
  color: var(--primary);
}

.add-item-btn {
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid rgba(30, 64, 175, 0.2);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.product-card:hover .add-item-btn {
  background: var(--primary);
  color: #ffffff;
}

/* POS Cart / Invoice Panel */
.pos-cart-panel {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  height: calc(100vh - 110px);
  position: sticky;
  top: 85px;
  box-shadow: var(--shadow-md);
}

.cart-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #f8fafc;
}

.cart-header h3 {
  font-size: 1rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-main);
}

.clear-cart-btn {
  background: transparent;
  border: none;
  color: var(--danger);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.clear-cart-btn:hover {
  text-decoration: underline;
}

/* Selected Items Table / List */
.cart-items-list {
  flex: 1;
  overflow-y: auto;
  padding: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.empty-cart-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.65rem;
}

.empty-cart-state i {
  font-size: 2.5rem;
  color: #cbd5e1;
}

.cart-item {
  background: #f8fafc;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.cart-item-row-1 {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cart-item-title {
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--text-main);
}

.cart-item-remove {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.82rem;
  transition: var(--transition);
}

.cart-item-remove:hover {
  color: var(--danger);
}

.cart-item-row-2 {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.qty-controls {
  display: flex;
  align-items: center;
  gap: 2px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 1px;
}

.qty-btn {
  background: transparent;
  border: none;
  color: var(--text-main);
  width: 24px;
  height: 24px;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-weight: 700;
}

.qty-btn:hover {
  background: #e2e8f0;
}

.qty-val {
  width: 30px;
  text-align: center;
  font-weight: 700;
  font-size: 0.82rem;
  border: none;
  background: transparent;
  color: var(--text-main);
}

.cart-item-total {
  font-weight: 800;
  font-size: 0.9rem;
  color: var(--primary);
}

/* Cart Summary Calculations */
.cart-summary {
  background: #f8fafc;
  border-top: 1px solid var(--border-color);
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.summary-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.summary-line strong {
  color: var(--text-main);
}

.summary-line.highlight {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-main);
  padding-top: 0.4rem;
  border-top: 1px dashed var(--border-color);
}

.summary-line.highlight .total-price {
  color: var(--primary);
  font-size: 1.25rem;
}

.credit-calc-box {
  background: var(--warning-bg);
  border: 1px solid rgba(217, 119, 6, 0.3);
  border-radius: var(--radius-sm);
  padding: 0.55rem 0.75rem;
  font-size: 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.credit-calc-line {
  display: flex;
  justify-content: space-between;
  color: var(--text-main);
}

.payment-type-selector {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-top: 0.3rem;
}

.pay-radio-btn {
  border: 1px solid var(--border-color);
  background: #ffffff;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  text-align: center;
  font-weight: 700;
  font-size: 0.8rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  color: var(--text-muted);
}

.pay-radio-btn.active {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary);
}

.generate-invoice-btn {
  width: 100%;
  padding: 0.8rem;
  background: var(--primary);
  border: none;
  border-radius: var(--radius-sm);
  color: #ffffff;
  font-weight: 800;
  font-size: 0.98rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  box-shadow: 0 2px 8px rgba(30, 64, 175, 0.3);
  transition: var(--transition);
  margin-top: 0.3rem;
}

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

.generate-invoice-btn:disabled {
  background: #cbd5e1;
  opacity: 0.7;
  cursor: not-allowed;
  box-shadow: none;
}

/* =========================================
   TAB 2 & 3: MANAGEMENT LAYOUT & TABLES
   ========================================= */
.management-layout {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 1.5rem;
  align-items: start;
}

@media (max-width: 900px) {
  .management-layout {
    grid-template-columns: 1fr;
  }
}

.form-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-card-title {
  font-size: 1.05rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-main);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-group label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
}

.form-group .form-input {
  padding-left: 0.85rem;
}

.submit-btn {
  padding: 0.75rem;
  background: var(--primary);
  border: none;
  border-radius: var(--radius-sm);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: var(--transition);
  margin-top: 0.25rem;
}

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

.cancel-btn {
  padding: 0.5rem;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.82rem;
  cursor: pointer;
}

/* Data Table Styling */
.table-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.table-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.table-header h3 {
  font-size: 1.05rem;
  font-weight: 800;
}

.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.88rem;
}

.data-table th {
  background: #f8fafc;
  padding: 0.75rem 1rem;
  font-weight: 700;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}

.data-table td {
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-main);
  vertical-align: middle;
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

.data-table tbody tr:hover {
  background: #f8fafc;
}

.action-btns {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.action-icon-btn {
  background: #ffffff;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  width: 28px;
  height: 28px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.75rem;
}

.action-icon-btn.edit:hover {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary);
}

.action-icon-btn.delete:hover {
  background: var(--danger-bg);
  color: var(--danger);
  border-color: var(--danger);
}

/* =========================================
   INVOICE PRINT VIEW MODAL
   ========================================= */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(3px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.modal-container {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  max-width: 540px;
  width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.modal-header {
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #f8fafc;
}

.modal-header h3 {
  font-size: 1rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.close-modal-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.15rem;
  cursor: pointer;
}

.close-modal-btn:hover {
  color: var(--danger);
}

.modal-body {
  padding: 1.25rem;
  overflow-y: auto;
  flex: 1;
  background: #f1f5f9;
}

/* Official Receipt Card */
.invoice-print-card {
  background: #ffffff;
  color: #0f172a;
  padding: 1.5rem;
  border-radius: var(--radius-sm);
  font-family: 'Inter', monospace;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  max-width: 440px;
  margin: 0 auto;
}

.invoice-company-header {
  text-align: center;
  border-bottom: 2px dashed #0f172a;
  padding-bottom: 0.85rem;
  margin-bottom: 0.85rem;
}

.company-title {
  font-size: 1.35rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: #0f172a;
}

.company-address {
  font-size: 0.82rem;
  font-weight: 600;
  color: #334155;
}

.company-contact {
  font-size: 0.75rem;
  color: #64748b;
}

.invoice-meta-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid #e2e8f0;
}

.invoice-customer-info {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 4px;
  padding: 0.65rem;
  margin-bottom: 0.85rem;
  font-size: 0.82rem;
}

.customer-info-line {
  display: flex;
  justify-content: space-between;
  margin-bottom: 2px;
}

.customer-info-line strong {
  color: #0f172a;
}

.invoice-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 0.85rem;
  font-size: 0.82rem;
}

.invoice-table th {
  border-top: 1px solid #000;
  border-bottom: 1px solid #000;
  padding: 5px 4px;
  text-align: left;
  font-size: 0.75rem;
  text-transform: uppercase;
}

.invoice-table td {
  padding: 5px 4px;
  border-bottom: 1px dashed #e2e8f0;
}

.invoice-table .num-col {
  text-align: right;
}

.invoice-totals-section {
  border-top: 2px dashed #000;
  padding-top: 0.65rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.85rem;
}

.total-row {
  display: flex;
  justify-content: space-between;
}

.total-row.grand-total {
  font-size: 1.1rem;
  font-weight: 900;
  border-top: 1px solid #000;
  border-bottom: 1px solid #000;
  padding: 5px 0;
  margin: 3px 0;
}

.credit-highlight-box {
  background: #fffbeb;
  border: 1px solid #fde68a;
  padding: 0.55rem;
  border-radius: 4px;
  margin-top: 0.35rem;
  font-size: 0.82rem;
  font-weight: 700;
}

.invoice-footer-note {
  text-align: center;
  margin-top: 1rem;
  padding-top: 0.65rem;
  border-top: 1px dashed #cbd5e1;
  font-size: 0.75rem;
  color: #475569;
}

/* Modal Action Toolbar Buttons */
.modal-footer {
  padding: 0.85rem 1.25rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
  background: #ffffff;
  flex-wrap: wrap;
}

.action-btn-group {
  display: flex;
  gap: 0.5rem;
}

.btn-whatsapp {
  background: #16a34a;
  color: #ffffff;
  border: none;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition);
}

.btn-whatsapp:hover {
  background: #15803d;
}

.btn-bluetooth {
  background: #0284c7;
  color: #ffffff;
  border: none;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition);
}

.btn-bluetooth:hover {
  background: #0369a1;
}

.btn-print {
  background: var(--primary);
  color: #ffffff;
  border: none;
  padding: 0.6rem 1.15rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition);
}

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

/* Toast Notifications (Top Positioned, Short & Compact) */
.toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  max-width: 320px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.45rem 0.85rem;
  border-radius: 20px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 600;
  font-size: 0.78rem;
  line-height: 1.2;
  animation: slideDownIn 0.2s ease-out;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast.success i { color: var(--success); }
.toast.warning i { color: var(--warning); }
.toast.error i { color: var(--danger); }
.toast.info i { color: var(--primary); }

@keyframes slideDownIn {
  from { transform: translateY(-20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* PRINT MEDIA STYLES */
@media print {
  body * {
    visibility: hidden;
  }
  .invoice-print-card, .invoice-print-card * {
    visibility: visible;
  }
  .invoice-print-card {
    position: absolute;
    left: 0;
    top: 0;
    width: 100% !important;
    max-width: 80mm !important;
    margin: 0 !important;
    padding: 8px !important;
    box-shadow: none !important;
    border: none !important;
  }
  .modal-backdrop, .app-header, .main-container {
    background: transparent !important;
  }
}

/* =========================================
   COMPREHENSIVE RESPONSIVE DESIGN (ALL DEVICES)
   ========================================= */

/* Tablets & Laptops (max-width: 1024px) */
@media (max-width: 1024px) {
  .header-container {
    padding: 0 0.5rem;
  }
  .pos-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  .pos-cart-panel {
    height: auto;
    position: static;
    margin-top: 0.5rem;
  }
  .management-layout {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
}

/* Mobile Phones (max-width: 768px) */
@media (max-width: 768px) {
  .app-header {
    padding: 0.5rem 0.75rem;
  }
  
  .header-container {
    flex-direction: column;
    align-items: stretch;
    gap: 0.65rem;
  }
  
  .logo {
    justify-content: center;
  }
  
  .nav-tabs {
    width: 100%;
    display: flex;
    overflow-x: auto;
    justify-content: space-between;
    padding: 3px;
    -webkit-overflow-scrolling: touch;
    gap: 4px;
  }

  .nav-tabs::-webkit-scrollbar {
    display: none;
  }
  
  .tab-btn {
    flex: 1;
    justify-content: center;
    padding: 0.55rem 0.65rem;
    font-size: 0.8rem;
    white-space: nowrap;
    border-radius: var(--radius-sm);
  }

  .main-container {
    padding: 0.75rem;
  }
  
  .form-select, .form-input {
    font-size: 16px; /* Prevents iOS browser auto-zoom on input focus */
    padding: 0.65rem 0.75rem 0.65rem 2.2rem;
  }

  .products-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0.75rem;
  }

  .product-card {
    padding: 0.75rem;
    gap: 0.5rem;
  }

  .product-name {
    font-size: 0.85rem;
  }

  .product-price {
    font-size: 0.95rem;
  }

  .add-item-btn {
    width: 34px;
    height: 34px;
  }

  .pos-cart-panel {
    border-radius: var(--radius-md);
  }

  .cart-header {
    padding: 0.85rem 1rem;
  }

  .cart-items-list {
    max-height: 260px;
    padding: 0.65rem;
  }

  .cart-summary {
    padding: 0.85rem 1rem;
  }

  .generate-invoice-btn {
    min-height: 48px;
    font-size: 1rem;
  }

  .modal-container {
    width: 95vw;
    max-height: 92vh;
    border-radius: var(--radius-md);
  }

  .modal-header {
    padding: 0.75rem 1rem;
  }

  .modal-body {
    padding: 0.85rem;
  }

  .invoice-print-card {
    padding: 1rem;
    width: 100%;
  }

  .modal-footer {
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem;
    gap: 0.5rem;
  }

  .action-btn-group {
    flex-direction: column;
    width: 100%;
    gap: 0.5rem;
  }

  .btn-whatsapp, .btn-bluetooth, .btn-print {
    width: 100%;
    min-height: 44px;
    justify-content: center;
    font-size: 0.9rem;
  }

  .toast-container {
    top: 0.75rem;
    left: 0.75rem;
    right: 0.75rem;
    max-width: none;
  }
  
  .toast {
    width: 100%;
    justify-content: center;
    padding: 0.45rem 0.75rem;
  }

  .data-table th, .data-table td {
    padding: 0.65rem 0.75rem;
    font-size: 0.8rem;
  }
}

/* Small Phones (< 480px) */
@media (max-width: 480px) {
  .logo-text {
    font-size: 20px;
  }
  .logo-icon {
    width: 70px;
    height: 35px;
  }
  .tab-btn span {
    font-size: 0.76rem;
  }
  .tab-btn i {
    font-size: 0.85rem;
  }
  .customer-row {
    flex-direction: column;
    gap: 0.5rem;
  }
  .quick-add-btn {
    justify-content: center;
    padding: 0.6rem;
    width: 100%;
  }
}