/* Modern Glassmorphism & High-Contrast Design System for SmartRetail AI */
:root {
  --bg-primary: #0a0f1d;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --border-card: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(99, 102, 241, 0.5);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-primary: #6366f1;
  --accent-primary-hover: #4f46e5;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
  --accent-glow: 0 0 20px rgba(99, 102, 241, 0.35);

  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.15);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.15);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.15);
  --danger-glow: 0 0 15px rgba(239, 68, 68, 0.4);
  --info: #06b6d4;
  --info-bg: rgba(6, 182, 212, 0.15);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(at 10% 20%, rgba(99, 102, 241, 0.12) 0px, transparent 40%),
    radial-gradient(at 90% 80%, rgba(168, 85, 247, 0.10) 0px, transparent 40%);
  background-attachment: fixed;
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

/* Sidebar */
.sidebar {
  width: 280px;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(16px);
  border-right: 1px solid var(--border-card);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 50;
}

.brand-header {
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--border-card);
}

.brand-logo {
  width: 42px;
  height: 42px;
  background: var(--accent-gradient);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: var(--accent-glow);
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #fff 30%, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-subtitle {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-menu {
  list-style: none;
  padding: 20px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
  border: 1px solid transparent;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.nav-item.active {
  background: rgba(99, 102, 241, 0.15);
  color: #818cf8;
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.15);
}

.nav-item.hidden-by-role {
  display: none !important;
}

.nav-item .badge {
  margin-left: auto;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.system-status {
  padding: 18px 20px;
  border-top: 1px solid var(--border-card);
  background: rgba(10, 15, 29, 0.6);
  font-size: 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.user-card-box {
  background: rgba(255, 255, 255, 0.04);
  padding: 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-card);
}

/* Main Content Area */
.main-wrapper {
  margin-left: 280px;
  flex: 1;
  padding: 32px 40px;
  max-width: 1400px;
}

/* Header Banner */
.top-banner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
  flex-wrap: wrap;
  gap: 16px;
}

.page-title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.page-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-normal);
  border: 1px solid transparent;
  outline: none;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 25px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  border-color: var(--border-card);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
}

.btn-danger {
  background: var(--danger-bg);
  color: #fca5a5;
  border-color: rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.3);
}

.btn-success {
  background: var(--success-bg);
  color: #6ee7b7;
  border-color: rgba(16, 185, 129, 0.3);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
}

/* KPI Cards Grid */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.kpi-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 22px;
  position: relative;
  overflow: hidden;
  transition: var(--transition-normal);
}

.kpi-card:hover {
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}

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

.kpi-card.kpi-danger::before { background: var(--danger); }
.kpi-card.kpi-warning::before { background: var(--warning); }
.kpi-card.kpi-success::before { background: var(--success); }

.kpi-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.kpi-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.kpi-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  background: rgba(255, 255, 255, 0.05);
}

.kpi-value {
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.kpi-subtext {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* Glass Tables */
.table-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 32px;
}

.table-card-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-card);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.table-title {
  font-size: 1.1rem;
  font-weight: 600;
}

.table-responsive {
  overflow-x: auto;
}

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

.custom-table th {
  background: rgba(15, 23, 42, 0.5);
  padding: 14px 20px;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-card);
}

.custom-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-card);
  color: var(--text-primary);
  vertical-align: middle;
}

.custom-table tbody tr {
  transition: var(--transition-fast);
}

.custom-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 600;
}

.badge-critical {
  background: var(--danger-bg);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
  box-shadow: var(--danger-glow);
}

.badge-warning {
  background: var(--warning-bg);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-success {
  background: var(--success-bg);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-info {
  background: var(--info-bg);
  color: #38bdf8;
  border: 1px solid rgba(6, 182, 212, 0.3);
}

/* Product item cell */
.product-cell {
  display: flex;
  align-items: center;
  gap: 14px;
}

.product-img {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  background: #1e293b;
  border: 1px solid var(--border-card);
}

.product-name {
  font-weight: 600;
  color: #fff;
}

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

/* Price Styling */
.price-strike {
  text-decoration: line-through;
  color: var(--text-muted);
  font-size: 0.82rem;
  margin-right: 6px;
}

.price-discounted {
  color: #f87171;
  font-weight: 700;
  font-size: 0.98rem;
}

.discount-pill {
  background: rgba(239, 68, 68, 0.2);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.4);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 700;
  margin-left: 6px;
}

/* Modals */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.78);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

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

.modal-content {
  background: #111827;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 620px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8), var(--accent-glow);
  transform: scale(0.95);
  transition: transform 0.2s ease;
  overflow: hidden;
}

.modal-backdrop.open .modal-content {
  transform: scale(1);
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-card);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(15, 23, 42, 0.6);
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
}

.modal-body {
  padding: 24px;
  max-height: 75vh;
  overflow-y: auto;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-card);
  background: rgba(15, 23, 42, 0.6);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* AI Recommendation Card in Modal */
.ai-rec-box {
  background: linear-gradient(145deg, rgba(99, 102, 241, 0.08) 0%, rgba(168, 85, 247, 0.04) 100%);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-top: 16px;
}

.ai-reasoning-text {
  font-size: 0.92rem;
  line-height: 1.6;
  color: #cbd5e1;
  background: rgba(0, 0, 0, 0.3);
  padding: 14px;
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--accent-primary);
  margin-top: 12px;
}

/* Forms */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

/* Auth Modal Tabs */
.auth-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-card);
  padding-bottom: 12px;
}

.auth-tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.auth-tab-btn.active {
  color: #818cf8;
  background: rgba(99, 102, 241, 0.15);
}

/* Quick test accounts box */
.quick-accounts-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-top: 16px;
  background: rgba(0, 0, 0, 0.25);
  padding: 14px;
  border-radius: var(--radius-sm);
  border: 1px dashed var(--border-card);
}

.account-badge-btn {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-card);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.82rem;
  cursor: pointer;
  transition: var(--transition-fast);
}

.account-badge-btn:hover {
  background: rgba(99, 102, 241, 0.2);
  border-color: var(--accent-primary);
}

/* Toast notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background: rgba(17, 24, 39, 0.95);
  border: 1px solid var(--border-card);
  backdrop-filter: blur(12px);
  padding: 14px 20px;
  border-radius: var(--radius-md);
  color: #fff;
  font-size: 0.88rem;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  animation: slideIn 0.3s ease forwards;
}

.toast.toast-success { border-color: rgba(16, 185, 129, 0.5); }
.toast.toast-danger { border-color: rgba(239, 68, 68, 0.5); }

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

/* Responsive */
@media (max-width: 900px) {
  .sidebar { width: 70px; }
  .brand-title, .brand-subtitle, .nav-item span, .system-status { display: none; }
  .main-wrapper { margin-left: 70px; padding: 20px; }
}