/* CSS Custom Variables for Theme Control */
:root {
  --font-main: 'Outfit', 'Noto Sans Sinhala', sans-serif;
  
  /* Light Theme Colors (Default) */
  --bg-app: #f1f5f9;
  --bg-sidebar: #ffffff;
  --bg-card: #ffffff;
  --bg-input: #f8fafc;
  --border-color: #e2e8f0;
  
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-on-accent: #ffffff;
  
  --primary-rgb: 37, 99, 235; /* Electric Blue */
  --primary: rgb(var(--primary-rgb));
  --primary-hover: #1d4ed8;
  --primary-light: rgba(var(--primary-rgb), 0.1);
  
  --accent-rgb: 99, 102, 241; /* Violet */
  --accent: rgb(var(--accent-rgb));
  
  --success: #10b981;
  --success-light: rgba(16, 185, 129, 0.1);
  --warning: #f59e0b;
  --warning-light: rgba(245, 158, 11, 0.1);
  --danger: #ef4444;
  --danger-light: rgba(239, 68, 68, 0.1);
  
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
  --shadow-premium: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.5);
}

[data-theme="dark"] {
  /* Dark Theme Colors */
  --bg-app: #0b0f19;
  --bg-sidebar: #111827;
  --bg-card: #1f2937;
  --bg-input: #111827;
  --border-color: #374151;
  
  --text-main: #f9fafb;
  --text-muted: #9ca3af;
  
  --primary-rgb: 59, 130, 246;
  --primary: rgb(var(--primary-rgb));
  --primary-hover: #60a5fa;
  --primary-light: rgba(var(--primary-rgb), 0.15);
  
  --accent-rgb: 129, 140, 248;
  --accent: rgb(var(--accent-rgb));
  
  --success: #34d399;
  --success-light: rgba(52, 211, 153, 0.15);
  --warning: #fbbf24;
  --warning-light: rgba(251, 191, 36, 0.15);
  --danger: #f87171;
  --danger-light: rgba(248, 113, 113, 0.15);
  
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
  --shadow-premium: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
  
  --glass-bg: rgba(31, 41, 55, 0.7);
  --glass-border: rgba(31, 41, 55, 0.5);
}

/* Global Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: var(--font-main);
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.15s ease, box-shadow 0.25s ease;
}

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

/* Layout Framework */
.app-container {
  display: grid;
  grid-template-columns: 260px 1fr;
  width: 100vw;
  height: 100vh;
}

/* Sidebar Styling */
.sidebar {
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 24px 16px;
  z-index: 10;
  box-shadow: var(--shadow-sm);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
  padding-left: 8px;
}

.logo-icon {
  font-size: 32px;
  color: var(--primary);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-text h2 {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--text-main), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-text p {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex-grow: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  position: relative;
}

.nav-item:hover {
  background-color: var(--bg-app);
  color: var(--text-main);
}

.nav-item.active {
  background: linear-gradient(135deg, var(--primary-light), rgba(var(--accent-rgb), 0.1));
  color: var(--primary);
  font-weight: 600;
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 15%;
  height: 70%;
  width: 4px;
  background: linear-gradient(to bottom, var(--primary), var(--accent));
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.nav-label {
  flex-grow: 1;
}

.badge {
  background-color: var(--danger);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.sidebar-footer {
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.connection-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  position: relative;
}

.status-dot.online {
  background-color: var(--success);
  box-shadow: 0 0 8px var(--success);
}

.status-dot.offline {
  background-color: var(--danger);
  box-shadow: 0 0 8px var(--danger);
}

/* Main Area Layout */
.main-content {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* Top Bar Styling */
.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 32px;
  background-color: var(--bg-sidebar);
  border-bottom: 1px solid var(--border-color);
  height: 72px;
}

.page-title h1 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.control-btn {
  background: var(--bg-app);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
}

.control-btn:hover {
  background: var(--border-color);
  box-shadow: var(--shadow-sm);
}

.theme-toggle {
  padding: 8px;
  border-radius: var(--radius-md);
  aspect-ratio: 1/1;
}

/* View Viewport Container */
.view-viewport {
  flex-grow: 1;
  padding: 24px 32px;
  overflow-y: auto;
  position: relative;
}

.view-panel {
  display: none;
  animation: fadeIn 0.3s ease-in-out;
  height: 100%;
}

.view-panel.active-view {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Section Action Bars */
.section-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  gap: 16px;
}

.subtitle-text {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Search Bar Wrapper */
.search-bar-container {
  position: relative;
  width: 100%;
  max-width: 420px;
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 20px;
}

.search-bar-container input {
  width: 100%;
  padding: 10px 16px 10px 44px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-main);
  font-size: 0.9rem;
  outline: none;
}

.search-bar-container input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

/* Buttons System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #ffffff;
}

.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: 0 4px 12px rgba(var(--primary-rgb), 0.2);
}

.btn-outline {
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-main);
}

.btn-outline:hover {
  background-color: var(--bg-input);
  border-color: var(--text-muted);
}

.btn-block {
  width: 100%;
}

.btn-icon-only {
  padding: 8px;
  aspect-ratio: 1/1;
  border-radius: var(--radius-md);
  border: none;
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-icon-only:hover {
  background-color: var(--border-color);
}

.text-danger {
  color: var(--danger);
}
.text-success {
  color: var(--success);
}
.action-buttons-group {
  display: flex;
  gap: 12px;
}

/* POS Screen Grid Layout */
.pos-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 24px;
  height: 100%;
}

.pos-products-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
  height: 100%;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  overflow-y: auto;
  padding-bottom: 24px;
  flex-grow: 1;
  align-content: start;
}

.logo-image {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

/* Product Card Styling */
.product-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
  position: relative;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

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

.product-sku {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.product-name {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 12px;
  line-height: 1.3;
}

.product-price-stock {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-top: auto;
}

.product-price {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
}

.product-stock {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 2px 8px;
  background-color: var(--bg-app);
  border-radius: var(--radius-sm);
}

.product-stock.out-of-stock {
  color: var(--danger);
  background-color: var(--danger-light);
}

.product-card-badge {
  position: absolute;
  top: 8px;
  right: 8px;
  background-color: var(--accent);
  color: #ffffff;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

/* POS Cart Styling */
.pos-cart-panel {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  padding: 20px;
  height: calc(100vh - 120px);
  box-shadow: var(--shadow-lg);
}

.cart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-color);
}

.cart-header h3 {
  font-size: 1.05rem;
  font-weight: 700;
}

.cart-items-container {
  flex-grow: 1;
  overflow-y: auto;
  margin: 16px 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-right: 4px;
}

.empty-cart-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-muted);
  gap: 8px;
}

.empty-icon {
  font-size: 48px;
  color: var(--border-color);
}

/* Cart Item Row */
.cart-item {
  display: flex;
  flex-direction: column;
  padding: 12px;
  background-color: var(--bg-app);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  gap: 8px;
}

.cart-item-main {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
}

.cart-item-name {
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1.3;
}

.cart-item-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 4px;
}

.cart-item-price {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-main);
}

.qty-control {
  display: flex;
  align-items: center;
  gap: 8px;
}

.qty-btn {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-weight: 700;
  color: var(--text-main);
}

.qty-btn:hover {
  background-color: var(--border-color);
}

.qty-value {
  font-size: 0.85rem;
  font-weight: 600;
  min-width: 16px;
  text-align: center;
}

.cart-item-serials {
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-top: 1px dashed var(--border-color);
  padding-top: 8px;
}

.serial-btn {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
}

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

.serial-tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.serial-tag {
  background-color: var(--primary-light);
  color: var(--primary);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 4px;
}

.cart-summary {
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.customer-section {
  background-color: var(--bg-app);
  padding: 10px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.customer-section h4 {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 8px;
  color: var(--text-muted);
}

.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.form-row-2 input {
  width: 100%;
  padding: 6px 10px;
  font-size: 0.8rem;
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-main);
  border-radius: var(--radius-sm);
  outline: none;
}

.form-row-2 input:focus {
  border-color: var(--primary);
}

.summary-details {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

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

.summary-line.total-line {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
  border-top: 1px solid var(--border-color);
  padding-top: 6px;
  margin-top: 4px;
}

.payment-method-section label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 6px;
  display: block;
}

.pay-methods-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}

.pay-method-btn {
  background-color: var(--bg-app);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 8px 4px;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  font-size: 0.75rem;
  font-weight: 600;
}

.pay-method-btn:hover {
  background-color: var(--border-color);
  color: var(--text-main);
}

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

.pay-method-btn .material-symbols-rounded {
  font-size: 20px;
}

.checkout-btn {
  padding: 12px;
}

/* Data Tables */
.table-container {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  box-shadow: var(--shadow-sm);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.data-table th, .data-table td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-color);
}

.data-table th {
  background-color: var(--bg-app);
  font-weight: 700;
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

.data-table tbody tr:hover {
  background-color: var(--bg-input);
}

.synced-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

.synced-badge.success {
  background-color: var(--success-light);
  color: var(--success);
}

.synced-badge.error {
  background-color: var(--danger-light);
  color: var(--danger);
}

.synced-badge.local {
  background-color: var(--warning-light);
  color: var(--warning);
}

/* Modals Layout & Glassmorphism Overlay */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease-in-out;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-premium);
  width: 90%;
  max-width: 600px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  transform: scale(0.95);
  transition: transform 0.2s ease-in-out;
}

.modal-overlay.open .modal-card {
  transform: scale(1);
}

.modal-sm {
  max-width: 400px;
}

.modal-lg {
  max-width: 800px;
}

.modal-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  font-size: 1.1rem;
  font-weight: 700;
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
  flex-grow: 1;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* Forms System */
.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-main);
}

.form-group input, .form-group textarea, .form-group select {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-input);
  color: var(--text-main);
  font-size: 0.9rem;
  outline: none;
}

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

.help-text {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
  display: block;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 24px;
}

/* Settings View Layout */
.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 24px;
}

.settings-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.settings-card .card-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 12px;
  background-color: var(--bg-app);
}

.card-icon {
  font-size: 24px;
}

.settings-card .card-body {
  padding: 24px;
}

/* Serial Checkbox Selector */
.serials-checkbox-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 240px;
  overflow-y: auto;
  padding: 6px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-input);
}

.serial-checkbox-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background-color: var(--bg-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  cursor: pointer;
}

.serial-checkbox-row:hover {
  background-color: var(--primary-light);
  border-color: var(--primary);
}

.serial-checkbox-row input {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
  cursor: pointer;
}

.serial-checkbox-row span {
  font-size: 0.85rem;
  font-weight: 600;
}

/* Toast Notification Styling */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 1000;
}

.toast {
  background-color: var(--bg-card);
  border-left: 4px solid var(--primary);
  box-shadow: var(--shadow-premium);
  color: var(--text-main);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  animation: slideIn 0.3s ease-out forwards;
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.toast.success { border-left-color: var(--success); }
.toast.danger { border-left-color: var(--danger); }
.toast.warning { border-left-color: var(--warning); }

/* Printing Invoice Layout */
.print-area {
  padding: 20px;
}

.invoice-box {
  width: 100%;
  max-width: 800px;
  margin: auto;
  font-family: 'Outfit', sans-serif;
  color: #000;
}

.invoice-header {
  text-align: center;
  border-bottom: 2px solid #000;
  padding-bottom: 12px;
  margin-bottom: 20px;
}

.invoice-header h1 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.invoice-header p {
  font-size: 0.85rem;
  color: #333;
}

.invoice-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin-bottom: 20px;
  font-size: 0.9rem;
  gap: 12px;
}

.meta-col-right {
  text-align: right;
}

.invoice-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 20px;
}

.invoice-table th, .invoice-table td {
  border-bottom: 1px solid #000;
  padding: 8px 10px;
  font-size: 0.9rem;
  text-align: left;
}

.invoice-table th {
  font-weight: 700;
  background-color: #f1f5f9;
}

.invoice-table td.text-right, .invoice-table th.text-right {
  text-align: right;
}

.invoice-totals {
  width: 280px;
  margin-left: auto;
  font-size: 0.9rem;
}

.totals-line {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
}

.totals-line.grand-total {
  font-size: 1.1rem;
  font-weight: 800;
  border-top: 2px solid #000;
  padding-top: 6px;
  margin-top: 4px;
}

.invoice-footer {
  text-align: center;
  font-size: 0.8rem;
  margin-top: 40px;
  border-top: 1px dashed #000;
  padding-top: 12px;
}

/* Print Overrides */
@media print {
  body {
    background-color: #ffffff !important;
    color: #000000 !important;
    height: auto !important;
    overflow: visible !important;
  }
  
  /* Hide the entire application structure completely during print */
  .app-container, .sidebar, .top-bar, .no-print, .toast-container, .view-viewport {
    display: none !important;
  }
  
  .modal-overlay.open {
    position: absolute !important;
    left: 0 !important;
    top: 0 !important;
    width: 100% !important;
    height: auto !important;
    background-color: #ffffff !important;
    backdrop-filter: none !important;
    display: block !important;
    opacity: 1 !important;
    pointer-events: auto !important;
    z-index: 99999 !important;
    overflow: visible !important;
  }
  
  .modal-card {
    border: none !important;
    box-shadow: none !important;
    width: 100% !important;
    max-width: 100% !important;
    transform: none !important;
    margin: 0 !important;
    padding: 0 !important;
    background-color: #ffffff !important;
  }
  
  .modal-header, .modal-footer {
    display: none !important;
  }
  
  .modal-body {
    padding: 0 !important;
    overflow: visible !important;
  }
}

/* Image Thumbnails & Product Card Media */
.product-card-image {
  width: 100%;
  height: 120px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  background-color: var(--bg-app);
  border: 1px solid var(--border-color);
}

.inventory-thumb {
  width: 38px;
  height: 38px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  margin-right: 10px;
  vertical-align: middle;
  background-color: var(--bg-app);
}

/* --- INVOICE CUSTOMIZATION TEMPLATE STYLES --- */
.invoice-box {
  background-color: #ffffff;
  color: #000000;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: none;
  font-family: var(--font-main);
}

/* Premium Blue Header Template */
.invoice-template-blue_header .invoice-header {
  background-color: var(--invoice-primary, #007acc) !important;
  color: #ffffff !important;
  padding: 24px;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  border-bottom: none !important;
  text-align: left;
  display: flex;
  flex-direction: column;
  margin-bottom: 24px;
  -webkit-print-color-adjust: exact;
  print-color-adjust: exact;
}

.invoice-title-large {
  font-size: 2.2rem;
  font-weight: 800;
  color: #ffffff !important;
  margin-bottom: 12px;
  line-height: 1;
}

.invoice-template-blue_header .invoice-header h1 {
  color: #ffffff !important;
  margin: 0 0 6px 0 !important;
  font-size: 1.6rem !important;
  font-weight: 800;
}

.invoice-template-blue_header .invoice-header p {
  color: rgba(255, 255, 255, 0.95) !important;
  margin: 0 !important;
  font-size: 0.85rem;
}

.invoice-template-blue_header .invoice-header .header-left-col {
  text-align: left;
}

.invoice-template-blue_header .invoice-header .header-right-col {
  text-align: right;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
}

.invoice-template-blue_header .invoice-logo {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  padding: 8px;
}

.invoice-template-blue_header .invoice-logo svg {
  width: 100%;
  height: 100%;
}

.invoice-template-blue_header .invoice-table th {
  background-color: var(--invoice-primary, #007acc) !important;
  color: #ffffff !important;
  border-bottom: none !important;
  font-weight: 700;
  font-size: 0.85rem;
  padding: 10px 12px;
  -webkit-print-color-adjust: exact;
  print-color-adjust: exact;
}

.invoice-template-blue_header .invoice-table td {
  border-bottom: 1px solid #e2e8f0 !important;
  padding: 12px;
}

.invoice-template-blue_header .totals-line.grand-total {
  background-color: var(--invoice-primary, #007acc) !important;
  color: #ffffff !important;
  border-top: none !important;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-weight: 800;
  font-size: 1.15rem;
  -webkit-print-color-adjust: exact;
  print-color-adjust: exact;
}

/* Minimalist Template */
.invoice-template-minimalist .invoice-header {
  text-align: left;
  border-bottom: 2px solid #000000 !important;
  padding-bottom: 14px;
  margin-bottom: 24px;
}

.invoice-template-minimalist .invoice-header h1 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 4px;
  color: #000000 !important;
}

.invoice-template-minimalist .invoice-header p {
  color: #333333 !important;
  margin: 0;
  font-size: 0.85rem;
}

.invoice-template-minimalist .invoice-table th {
  background-color: #f1f5f9 !important;
  color: #000000 !important;
  border-bottom: 2px solid #000000 !important;
  font-weight: 700;
}

.invoice-template-minimalist .invoice-table td {
  border-bottom: 1px solid #e2e8f0 !important;
}

.invoice-template-minimalist .totals-line.grand-total {
  border-top: 2px solid #000000 !important;
  font-weight: 800;
  font-size: 1.15rem;
  padding-top: 8px;
}

/* Common Invoice Custom Elements */
.discount-line {
  color: #dc2626 !important;
  font-weight: 600;
  -webkit-print-color-adjust: exact;
  print-color-adjust: exact;
}

.item-warranty-info {
  font-size: 0.75rem;
  color: #4b5563;
  margin-top: 4px;
  font-weight: 500;
}

.warranty-note {
  font-size: 0.75rem;
  color: #4b5563;
  margin-top: 8px;
  font-style: italic;
  line-height: 1.4;
}

.invoice-meta strong {
  color: #000000 !important;
}

/* --- LOGIN SCREEN STYLING --- */
.login-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-app);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  padding: 20px;
}

.login-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-premium);
  width: 100%;
  max-width: 400px;
  padding: 32px;
}

.login-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.login-brand h2 {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-main);
}

.login-brand p {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
}
/* --- MOBILE RESPONSIVE MEDIA QUERIES --- */

/* Tab bar display hidden by default (desktop) */
.pos-mobile-tabs {
  display: none;
}

/* Sidebar Backdrop Overlay - Global to keep out of grid layout flow */
.sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(4px);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.sidebar-overlay.visible {
  opacity: 1;
  pointer-events: auto;
}

/* Flex modal forms to allow inner modal-body scrolling */
.modal-card form {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  overflow: hidden;
}

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

  /* Slide-out Sidebar Drawer */
  .sidebar {
    position: fixed;
    top: 0;
    left: -280px;
    bottom: 0;
    width: 260px;
    z-index: 1000;
    box-shadow: var(--shadow-premium);
    transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .sidebar.open {
    left: 0;
  }

  #sidebar-toggle-btn {
    display: inline-flex !important;
  }

  /* POS View Grid adjustments */
  .pos-mobile-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    background-color: var(--bg-card);
    padding: 6px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    margin-bottom: 16px;
  }

  .pos-tab-btn {
    background: transparent;
    border: none;
    padding: 10px;
    font-family: var(--font-main);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s ease;
  }

  .pos-tab-btn.active {
    background-color: var(--primary-light);
    color: var(--primary);
  }

  .pos-layout {
    grid-template-columns: 1fr;
    gap: 16px;
    height: auto;
  }

  /* Toggle active POS panels on mobile */
  .pos-layout.show-cart .pos-products-panel {
    display: none !important;
  }

  .pos-layout:not(.show-cart) .pos-cart-panel {
    display: none !important;
  }

  .pos-cart-panel {
    height: auto;
    min-height: calc(100vh - 220px);
  }

  .view-viewport {
    padding: 16px;
  }
}

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

  .form-row-2 {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .section-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .section-actions .search-bar-container {
    max-width: 100%;
  }

  .action-buttons-group {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }

  .action-buttons-group .btn {
    flex: 1 1 calc(50% - 4px);
  }

  /* Modals scale constraints */
  .modal-card {
    width: 95%;
    max-height: 95vh;
  }

  .modal-body {
    padding: 16px;
  }

  .modal-header, .modal-footer {
    padding: 12px 16px;
  }

  .data-table th, .data-table td {
    padding: 10px 12px;
  }
}

@media (max-width: 480px) {
  .top-bar {
    padding: 12px 16px;
    height: auto;
    min-height: 72px;
    flex-wrap: nowrap;
    gap: 8px;
  }

  .top-bar h1 {
    font-size: 1.1rem;
  }

  .control-btn.lang-switcher .lang-text {
    display: none;
  }

  .login-card {
    padding: 24px 16px;
  }

  .login-brand h2 {
    font-size: 1.15rem;
  }

  .action-buttons-group .btn {
    flex: 1 1 100%;
  }
}

/* --- REPORTS & EXPENSES DASHBOARD --- */
.reports-layout {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding-bottom: 24px;
}

.reports-filter-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 16px 24px;
  box-shadow: var(--shadow-sm);
  flex-wrap: wrap;
  gap: 16px;
}

.filter-inputs {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.filter-inputs label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.filter-inputs input[type="date"] {
  padding: 8px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-input);
  color: var(--text-main);
  outline: none;
  font-size: 0.85rem;
}

.filter-presets {
  display: flex;
  gap: 8px;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

@media (max-width: 1200px) {
  .kpi-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .kpi-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.kpi-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  overflow: hidden;
}

.kpi-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background-color: var(--primary);
}

.kpi-card.cogs::before { background-color: var(--accent); }
.kpi-card.discounts::before { background-color: var(--warning); }
.kpi-card.expenses::before { background-color: var(--danger); }
.kpi-card.profit::before { background-color: var(--success); }

.kpi-card.profit-negative::before {
  background-color: var(--danger);
}

.kpi-card.profit-positive {
  background-color: var(--success-light);
}

.kpi-card.profit-negative {
  background-color: var(--danger-light);
}

.kpi-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.kpi-value {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-main);
}

.kpi-footer-text {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.reports-split-grid {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 24px;
}

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