/* ==========================================================================
   INVENTORY MANAGEMENT - Smart Stock Tracking
   Modern dashboard with alert system and AI integration
   ========================================================================== */

/* CSS Variables - Inventory Palette */
:root {
  --inv-bg: #f8fafc;
  --inv-bg-secondary: #f1f5f9;
  --inv-card: #ffffff;
  --inv-card-hover: #fafafa;
  --inv-border: #e2e8f0;
  --inv-text: #1e293b;
  --inv-text-secondary: #475569;
  --inv-muted: #64748b;

  /* Status Colors */
  --inv-critical: #dc2626;
  --inv-critical-bg: #fef2f2;
  --inv-critical-border: #fecaca;
  --inv-warning: #f59e0b;
  --inv-warning-bg: #fffbeb;
  --inv-warning-border: #fde68a;
  --inv-good: #10b981;
  --inv-good-bg: #ecfdf5;
  --inv-good-border: #a7f3d0;

  /* UI Colors */
  --inv-primary: #3b82f6;
  --inv-primary-hover: #2563eb;
  --inv-danger: #ef4444;
  --inv-shadow: rgba(0, 0, 0, 0.08);
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
  :root {
    --inv-bg: #0f172a;
    --inv-bg-secondary: #1e293b;
    --inv-card: #1e293b;
    --inv-card-hover: #334155;
    --inv-border: #334155;
    --inv-text: #f1f5f9;
    --inv-text-secondary: #cbd5e1;
    --inv-muted: #94a3b8;
    --inv-critical-bg: rgba(220, 38, 38, 0.15);
    --inv-warning-bg: rgba(245, 158, 11, 0.15);
    --inv-good-bg: rgba(16, 185, 129, 0.15);
  }
}

/* ==========================================================================
   Base Container
   ========================================================================== */

.inventory-container {
  min-height: 100vh;
  background: var(--inv-bg);
  padding: 1.5rem;
  color: var(--inv-text);
}

/* ==========================================================================
   Header
   ========================================================================== */

.inventory-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

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

.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.page-title .icon {
  font-size: 1.75rem;
}

.sync-status {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.75rem;
  background: var(--inv-good-bg);
  border: 1px solid var(--inv-good-border);
  border-radius: 20px;
  font-size: 0.8rem;
  color: var(--inv-good);
}

.sync-status.syncing .sync-icon {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

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

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  border: none;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn .icon {
  font-size: 1.1rem;
}

.btn-primary {
  background: var(--inv-primary);
  color: white;
}

.btn-primary:hover {
  background: var(--inv-primary-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--inv-card);
  color: var(--inv-text);
  border: 1px solid var(--inv-border);
}

.btn-secondary:hover {
  background: var(--inv-bg-secondary);
}

.btn-danger {
  background: var(--inv-danger);
  color: white;
}

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

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.8rem;
}

/* ==========================================================================
   Alerts Section
   ========================================================================== */

.alerts-section {
  margin-bottom: 1.5rem;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.section-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.alert-count {
  padding: 0.25rem 0.75rem;
  background: var(--inv-critical);
  color: white;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 700;
}

.alert-count.no-alerts {
  background: var(--inv-good);
}

.alerts-container {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* Alert Card */
.alert-card {
  background: var(--inv-card);
  border-radius: 12px;
  border: 2px solid var(--inv-border);
  overflow: hidden;
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.alert-card.critical {
  border-color: var(--inv-critical);
  background: var(--inv-critical-bg);
}

.alert-card.warning {
  border-color: var(--inv-warning);
  background: var(--inv-warning-bg);
}

.alert-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--inv-border);
}

.alert-badge {
  padding: 0.375rem 0.75rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.alert-badge.critical {
  background: var(--inv-critical);
  color: white;
}

.alert-badge.warning {
  background: var(--inv-warning);
  color: #1a1a2e;
}

.alert-name {
  font-size: 1.1rem;
  font-weight: 600;
  flex: 1;
}

.alert-body {
  padding: 1rem 1.25rem;
}

/* Stock Bar */
.stock-bar-container {
  margin-bottom: 1rem;
}

.stock-bar {
  height: 12px;
  background: var(--inv-bg-secondary);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.stock-bar-fill {
  height: 100%;
  border-radius: 6px;
  transition: width 0.5s ease;
}

.stock-bar-fill.critical {
  background: linear-gradient(90deg, var(--inv-critical), #f87171);
}

.stock-bar-fill.warning {
  background: linear-gradient(90deg, var(--inv-warning), #fbbf24);
}

.stock-bar-fill.good {
  background: linear-gradient(90deg, var(--inv-good), #34d399);
}

.stock-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--inv-muted);
}

/* Alert Stats */
.alert-stats {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 1rem;
  padding: 0.75rem;
  background: var(--inv-bg);
  border-radius: 8px;
}

.alert-stat {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.alert-stat .icon {
  font-size: 1rem;
}

/* Affected Dishes */
.affected-dishes {
  margin-bottom: 1rem;
}

.affected-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--inv-muted);
  margin-bottom: 0.5rem;
}

.affected-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.affected-item {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.75rem;
  background: var(--inv-bg);
  border-radius: 6px;
  font-size: 0.85rem;
}

.affected-item.disabled {
  color: var(--inv-critical);
}

.affected-item.low {
  color: var(--inv-warning);
}

/* Alert Actions */
.alert-actions {
  display: flex;
  gap: 0.75rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--inv-border);
}

.alert-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem;
  background: var(--inv-card);
  border: 1px solid var(--inv-border);
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.alert-btn:hover {
  background: var(--inv-bg-secondary);
  transform: translateY(-2px);
}

.alert-btn.primary {
  background: var(--inv-primary);
  color: white;
  border-color: var(--inv-primary);
}

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

/* ==========================================================================
   Stats Section
   ========================================================================== */

.stats-section {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--inv-card);
  border-radius: 12px;
  border: 1px solid var(--inv-border);
}

.stat-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--inv-bg-secondary);
  border-radius: 12px;
  font-size: 1.5rem;
}

.stat-icon.good {
  background: var(--inv-good-bg);
  color: var(--inv-good);
}

.stat-icon.warning {
  background: var(--inv-warning-bg);
  color: var(--inv-warning);
}

.stat-icon.critical {
  background: var(--inv-critical-bg);
  color: var(--inv-critical);
}

.stat-content {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
}

.stat-value.stat-good {
  color: var(--inv-good);
}

.stat-value.stat-warning {
  color: var(--inv-warning);
}

.stat-value.stat-critical {
  color: var(--inv-critical);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--inv-muted);
}

/* ==========================================================================
   Table Section
   ========================================================================== */

.table-section {
  background: var(--inv-card);
  border-radius: 12px;
  border: 1px solid var(--inv-border);
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.table-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--inv-border);
  flex-wrap: wrap;
  gap: 1rem;
}

.table-controls {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--inv-bg);
  border: 1px solid var(--inv-border);
  border-radius: 8px;
}

.search-icon {
  font-size: 1rem;
  color: var(--inv-muted);
}

.search-input {
  border: none;
  background: transparent;
  font-size: 0.9rem;
  width: 180px;
  color: var(--inv-text);
}

.search-input::placeholder {
  color: var(--inv-muted);
}

.search-input:focus {
  outline: none;
}

.filter-select {
  padding: 0.5rem 1rem;
  background: var(--inv-bg);
  border: 1px solid var(--inv-border);
  border-radius: 8px;
  font-size: 0.9rem;
  color: var(--inv-text);
  cursor: pointer;
}

/* Table */
.table-container {
  overflow-x: auto;
}

.inventory-table {
  width: 100%;
  border-collapse: collapse;
}

.inventory-table th,
.inventory-table td {
  padding: 1rem 1.25rem;
  text-align: left;
  border-bottom: 1px solid var(--inv-border);
}

.inventory-table th {
  background: var(--inv-bg-secondary);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--inv-muted);
  font-weight: 600;
}

.inventory-table tbody tr {
  transition: background 0.2s ease;
}

.inventory-table tbody tr:hover {
  background: var(--inv-bg);
}

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

/* Column Widths */
.col-name { width: 25%; }
.col-category { width: 12%; }
.col-stock { width: 15%; }
.col-threshold { width: 10%; }
.col-trend { width: 12%; }
.col-status { width: 12%; }
.col-actions { width: 14%; }

/* Cell Styles */
.cell-name {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.item-emoji {
  font-size: 1.5rem;
}

.item-name-text {
  font-weight: 600;
}

.cell-category {
  color: var(--inv-muted);
  font-size: 0.9rem;
}

.cell-stock {
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.cell-threshold {
  color: var(--inv-muted);
  font-variant-numeric: tabular-nums;
}

/* Stock Mini Bar */
.stock-mini-bar {
  width: 60px;
  height: 6px;
  background: var(--inv-bg-secondary);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 0.25rem;
}

.stock-mini-fill {
  height: 100%;
  border-radius: 3px;
}

/* Trend */
.cell-trend {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.trend-icon {
  font-size: 0.9rem;
}

.trend-value {
  font-weight: 600;
  font-size: 0.9rem;
}

.trend-up {
  color: var(--inv-critical);
}

.trend-down {
  color: var(--inv-good);
}

.trend-stable {
  color: var(--inv-muted);
}

/* Status Badge */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

.status-badge.good {
  background: var(--inv-good-bg);
  color: var(--inv-good);
}

.status-badge.warning {
  background: var(--inv-warning-bg);
  color: var(--inv-warning);
}

.status-badge.critical {
  background: var(--inv-critical-bg);
  color: var(--inv-critical);
}

/* Table Actions */
.cell-actions {
  display: flex;
  gap: 0.5rem;
}

.action-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--inv-bg);
  border: 1px solid var(--inv-border);
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.action-btn:hover {
  background: var(--inv-bg-secondary);
  transform: scale(1.05);
}

.action-btn.restock {
  background: var(--inv-good-bg);
  border-color: var(--inv-good-border);
}

.action-btn.restock:hover {
  background: var(--inv-good);
  color: white;
}

/* Pagination */
.table-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  padding: 1rem;
  border-top: 1px solid var(--inv-border);
}

.pagination-btn {
  padding: 0.5rem 1rem;
  background: var(--inv-bg);
  border: 1px solid var(--inv-border);
  border-radius: 6px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.pagination-btn:hover:not(:disabled) {
  background: var(--inv-bg-secondary);
}

.pagination-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.pagination-info {
  font-size: 0.9rem;
  color: var(--inv-muted);
}

/* ==========================================================================
   AI Section
   ========================================================================== */

.ai-section {
  background: var(--inv-card);
  border-radius: 12px;
  border: 1px solid var(--inv-border);
  padding: 1.25rem;
}

.time-badge {
  padding: 0.25rem 0.75rem;
  background: var(--inv-bg-secondary);
  border-radius: 20px;
  font-size: 0.8rem;
  color: var(--inv-muted);
}

.ai-log {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1rem;
}

.ai-log-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.75rem;
  background: var(--inv-bg);
  border-radius: 8px;
}

.ai-log-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--inv-good-bg);
  color: var(--inv-good);
  border-radius: 50%;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.ai-log-content {
  flex: 1;
}

.ai-log-text {
  font-size: 0.9rem;
  color: var(--inv-text);
}

.ai-log-time {
  font-size: 0.8rem;
  color: var(--inv-muted);
  margin-top: 0.25rem;
}

/* ==========================================================================
   Modal
   ========================================================================== */

.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal.active {
  display: flex;
}

.modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  width: 90%;
  max-width: 500px;
  background: var(--inv-card);
  border-radius: 16px;
  border: 1px solid var(--inv-border);
  overflow: hidden;
  animation: modalSlideIn 0.3s ease;
}

.modal-content.modal-small {
  max-width: 400px;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--inv-border);
}

.modal-header h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0;
}

.modal-close {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--inv-border);
  border-radius: 8px;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--inv-muted);
  transition: all 0.2s ease;
}

.modal-close:hover {
  background: var(--inv-danger);
  color: white;
  border-color: var(--inv-danger);
}

.modal-body {
  padding: 1.5rem;
}

.modal-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.modal-actions .btn {
  flex: 1;
}

/* Form Styles */
.form-group {
  margin-bottom: 1rem;
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--inv-text-secondary);
}

.form-input,
.form-select {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--inv-bg);
  border: 1px solid var(--inv-border);
  border-radius: 8px;
  font-size: 0.95rem;
  color: var(--inv-text);
  transition: border-color 0.2s ease;
}

.form-input:focus,
.form-select:focus {
  outline: none;
  border-color: var(--inv-primary);
}

.form-input.form-input-large {
  font-size: 1.5rem;
  text-align: center;
  font-weight: 700;
}

.form-hint {
  display: block;
  margin-top: 0.375rem;
  font-size: 0.8rem;
  color: var(--inv-muted);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* Restock Info */
.restock-info {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--inv-bg);
  border-radius: 8px;
  margin-bottom: 1.5rem;
}

.restock-info-icon {
  font-size: 2rem;
}

.restock-info-name {
  font-size: 1.1rem;
  font-weight: 600;
}

.restock-info-current {
  font-size: 0.9rem;
  color: var(--inv-muted);
}

/* ==========================================================================
   Toast
   ========================================================================== */

.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 9999;
}

.toast {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  background: var(--inv-card);
  border-radius: 10px;
  border: 1px solid var(--inv-border);
  box-shadow: 0 4px 12px var(--inv-shadow);
  animation: toastSlideIn 0.3s ease;
}

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

.toast.success {
  border-color: var(--inv-good);
  background: var(--inv-good-bg);
}

.toast.error {
  border-color: var(--inv-critical);
  background: var(--inv-critical-bg);
}

.toast.warning {
  border-color: var(--inv-warning);
  background: var(--inv-warning-bg);
}

.toast-icon {
  font-size: 1.25rem;
}

.toast-message {
  font-size: 0.9rem;
  font-weight: 500;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1024px) {
  .stats-section {
    grid-template-columns: repeat(2, 1fr);
  }

  .table-controls {
    width: 100%;
  }

  .search-box {
    flex: 1;
  }

  .filter-select {
    flex: 1;
  }
}

@media (max-width: 768px) {
  .inventory-container {
    padding: 1rem;
  }

  .inventory-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .header-actions {
    width: 100%;
  }

  .header-actions .btn {
    flex: 1;
  }

  .stats-section {
    grid-template-columns: 1fr 1fr;
  }

  .stat-card {
    padding: 1rem;
  }

  .stat-icon {
    width: 40px;
    height: 40px;
    font-size: 1.25rem;
  }

  .stat-value {
    font-size: 1.25rem;
  }

  .table-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .table-controls {
    flex-direction: column;
  }

  .search-box,
  .filter-select {
    width: 100%;
  }

  .inventory-table th,
  .inventory-table td {
    padding: 0.75rem;
    font-size: 0.85rem;
  }

  .col-trend,
  .col-threshold {
    display: none;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .alert-stats {
    flex-direction: column;
    gap: 0.75rem;
  }

  .alert-actions {
    flex-direction: column;
  }
}

/* ==========================================================================
   Empty State
   ========================================================================== */

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 2rem;
  text-align: center;
}

.empty-state-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.empty-state-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.empty-state-text {
  font-size: 0.95rem;
  color: var(--inv-muted);
  max-width: 400px;
}