:root {
  --primary: #7c3aed;
  --primary-hover: #6d28d9;
  --primary-light: #f5f3ff;
  --primary-border: #ddd6fe;
  
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-sidebar: #0f172a;
  
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  
  --border-color: #e2e8f0;
  --border-light: #f1f5f9;
  
  --success: #10b981;
  --success-bg: #ecfdf5;
  --warning: #f59e0b;
  --warning-bg: #fffbeb;
  --danger: #ef4444;
  --danger-bg: #fef2f2;
  --info: #0ea5e9;
  --info-bg: #f0f9ff;
  
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-main);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* Layout */
.app-wrapper {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 250px;
  background: var(--bg-sidebar);
  color: #f8fafc;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 40;
  transition: transform 0.3s ease;
}

.sidebar-header {
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid #1e293b;
}

.sidebar-logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #a855f7, #7c3aed);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.sidebar-title {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.sidebar-sub {
  font-size: 11px;
  color: #94a3b8;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-section-title {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: #64748b;
  padding: 12px 12px 6px;
  font-weight: 700;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: #cbd5e1;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

.nav-item:hover {
  background: #1e293b;
  color: #ffffff;
}

.nav-item.active {
  background: var(--primary);
  color: #ffffff;
  font-weight: 600;
}

.nav-icon {
  font-size: 18px;
  width: 20px;
  text-align: center;
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid #1e293b;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.user-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
}

.user-avatar {
  width: 32px;
  height: 32px;
  background: #334155;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #e2e8f0;
}

/* Main Container */
.main-content {
  flex: 1;
  margin-left: 250px;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.topbar {
  background: var(--bg-card);
  height: 64px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 30;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.page-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Connectivity status pill */
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.status-online {
  background: var(--success-bg);
  color: #065f46;
  border: 1px solid #a7f3d0;
}

.status-offline {
  background: var(--warning-bg);
  color: #92400e;
  border: 1px solid #fde68a;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.dot-online { background: #10b981; }
.dot-offline { background: #f59e0b; }

.content-body {
  padding: 24px;
  flex: 1;
}

/* Grid & Cards */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  padding: 18px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.stat-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.3px;
}

.stat-val {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.5px;
}

.stat-sub {
  font-size: 11px;
  color: var(--text-light);
}

.stat-icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

.icon-purple { background: #f3e8ff; color: #7c3aed; }
.icon-emerald { background: #d1fae5; color: #059669; }
.icon-amber { background: #fef3c7; color: #d97706; }
.icon-rose { background: #ffe4e6; color: #e11d48; }
.icon-blue { background: #e0f2fe; color: #0284c7; }

/* Panel / Table Card */
.panel {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  margin-bottom: 24px;
}

.panel-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.panel-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
}

.panel-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}

table.data-table th {
  background: #f8fafc;
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  color: #475569;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

table.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-light);
  vertical-align: middle;
}

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

.text-right { text-align: right !important; }
.text-center { text-align: center !important; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.btn-sm {
  padding: 5px 10px;
  font-size: 12px;
}

.btn-lg {
  padding: 12px 20px;
  font-size: 15px;
}

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

.btn-secondary { background: #f1f5f9; color: #334155; border-color: #cbd5e1; }
.btn-secondary:hover { background: #e2e8f0; }

.btn-success { background: #10b981; color: #fff; }
.btn-success:hover { background: #059669; }

.btn-danger { background: #ef4444; color: #fff; }
.btn-danger:hover { background: #dc2626; }

/* Inputs & Form Controls */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 12.5px;
  font-weight: 600;
  margin-bottom: 6px;
  color: #334155;
}

.form-control {
  width: 100%;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  font-size: 13.5px;
  outline: none;
  transition: border-color 0.15s ease;
  background: #fff;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.12);
}

.search-input-wrap {
  position: relative;
  min-width: 240px;
}

.search-input-wrap input {
  padding-left: 32px;
}

.search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: #94a3b8;
  pointer-events: none;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
}

.badge-success { background: var(--success-bg); color: #065f46; }
.badge-warning { background: var(--warning-bg); color: #92400e; }
.badge-danger { background: var(--danger-bg); color: #991b1b; }
.badge-info { background: var(--info-bg); color: #0369a1; }
.badge-purple { background: var(--primary-light); color: var(--primary); }

/* POS Terminal Layout */
.pos-container {
  display: flex;
  gap: 20px;
  height: calc(100vh - 112px);
}

.pos-catalog {
  flex: 1.3;
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.pos-cart {
  flex: 0.9;
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.catalog-search-bar {
  padding: 14px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  gap: 10px;
  background: #f8fafc;
}

.category-pills {
  display: flex;
  gap: 6px;
  padding: 8px 14px;
  overflow-x: auto;
  border-bottom: 1px solid var(--border-light);
  white-space: nowrap;
}

.cat-pill {
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  background: #f1f5f9;
  color: #475569;
  border: 1px solid transparent;
}

.cat-pill.active {
  background: var(--primary);
  color: #fff;
}

.product-grid {
  flex: 1;
  padding: 14px;
  overflow-y: auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 12px;
  align-content: start;
}

.pos-product-card {
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.15s ease;
  user-select: none;
}

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

.pos-prod-name {
  font-size: 12px;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 4px;
  color: var(--text-main);
}

.pos-prod-barcode {
  font-size: 10px;
  color: var(--text-light);
  margin-bottom: 6px;
}

.pos-prod-price {
  font-size: 14px;
  font-weight: 800;
  color: var(--primary);
}

.pos-prod-stock {
  font-size: 10.5px;
  color: #64748b;
  margin-top: 2px;
}

.cart-items-list {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
}

.cart-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px;
  border-bottom: 1px solid var(--border-light);
  gap: 8px;
}

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

.cart-item-name {
  font-size: 13px;
  font-weight: 600;
}

.cart-item-price {
  font-size: 12px;
  color: var(--text-muted);
}

.cart-qty-ctrl {
  display: flex;
  align-items: center;
  gap: 6px;
}

.qty-btn {
  width: 26px;
  height: 26px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: #f8fafc;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  cursor: pointer;
}

.qty-val {
  font-weight: 700;
  font-size: 13px;
  min-width: 20px;
  text-align: center;
}

.cart-total-section {
  padding: 16px;
  border-top: 2px solid var(--border-color);
  background: #f8fafc;
}

.cart-summary-row {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  margin-bottom: 6px;
  color: #475569;
}

.cart-grand-total {
  font-size: 20px;
  font-weight: 800;
  color: #0f172a;
  border-top: 1px dashed #cbd5e1;
  padding-top: 8px;
  margin-top: 6px;
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

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

.modal-card {
  background: #fff;
  border-radius: var(--radius-md);
  width: 90%;
  max-width: 550px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
}

.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 16px;
  font-weight: 700;
}

.modal-body {
  padding: 20px;
}

.modal-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  background: #f8fafc;
}

/* Toast Notifications */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 60;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  background: #1e293b;
  color: #fff;
  font-size: 13.5px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideIn 0.25s ease;
}

.toast-success { background: #065f46; border-left: 4px solid #10b981; }
.toast-error { background: #7f1d1d; border-left: 4px solid #ef4444; }
.toast-info { background: #0c4a6e; border-left: 4px solid #0ea5e9; }

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

@media (max-width: 900px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .pos-container { flex-direction: column; height: auto; }
}