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

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --success: #16a34a;
  --success-light: #dcfce7;
  --warning: #d97706;
  --warning-light: #fef3c7;
  --danger: #dc2626;
  --danger-light: #fee2e2;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --sidebar-width: 250px;
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
  --radius: 8px;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: var(--gray-50);
  color: var(--gray-800);
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: var(--gray-900);
  color: white;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: 100;
  transition: transform 0.3s;
}

.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid var(--gray-700);
}

.sidebar-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.sidebar-header p {
  font-size: 0.8rem;
  color: var(--gray-400);
  margin-top: 4px;
}

.nav-menu {
  list-style: none;
  padding: 8px 0;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  cursor: pointer;
  transition: background 0.2s;
  font-size: 0.9rem;
  color: var(--gray-300);
  border-left: 3px solid transparent;
}

.nav-item:hover {
  background: var(--gray-800);
  color: white;
}

.nav-item.active {
  background: var(--gray-800);
  color: white;
  border-left-color: var(--primary);
}

.nav-icon {
  font-size: 1.1rem;
  width: 24px;
  text-align: center;
}

/* Main content */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  padding: 24px;
  min-height: 100vh;
}

/* Page header */
.page-header {
  margin-bottom: 24px;
}

.page-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-900);
}

.page-header p {
  color: var(--gray-500);
  margin-top: 4px;
  font-size: 0.9rem;
}

/* Cards */
.card {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 16px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--gray-200);
}

.card-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
}

/* Stats grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  display: flex;
  flex-direction: column;
}

.stat-card .stat-label {
  font-size: 0.85rem;
  color: var(--gray-500);
  margin-bottom: 8px;
}

.stat-card .stat-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--gray-900);
}

.stat-card .stat-sub {
  font-size: 0.8rem;
  color: var(--gray-400);
  margin-top: 4px;
}

.stat-card.primary { border-left: 4px solid var(--primary); }
.stat-card.success { border-left: 4px solid var(--success); }
.stat-card.warning { border-left: 4px solid var(--warning); }
.stat-card.danger { border-left: 4px solid var(--danger); }

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

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th, td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--gray-200);
}

th {
  background: var(--gray-50);
  font-weight: 600;
  color: var(--gray-600);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

tr:hover {
  background: var(--gray-50);
}

/* Badges */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge.success { background: var(--success-light); color: var(--success); }
.badge.warning { background: var(--warning-light); color: var(--warning); }
.badge.danger { background: var(--danger-light); color: var(--danger); }
.badge.primary { background: var(--primary-light); color: var(--primary); }

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

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}

.form-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.form-row .form-group {
  flex: 1;
  min-width: 150px;
}

input, select, textarea {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--gray-300);
  border-radius: 6px;
  font-size: 0.9rem;
  font-family: inherit;
  transition: border-color 0.2s;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
  font-family: inherit;
}

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

.btn-success {
  background: var(--success);
  color: white;
}
.btn-success:hover { background: #15803d; }

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

.btn-danger {
  background: var(--danger);
  color: white;
}
.btn-danger:hover { background: #b91c1c; }

.btn-outline {
  background: white;
  color: var(--gray-700);
  border: 1px solid var(--gray-300);
}
.btn-outline:hover { background: var(--gray-50); }

.btn-sm {
  padding: 4px 10px;
  font-size: 0.8rem;
}

/* Toolbar */
.toolbar {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

/* Alert */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 0.9rem;
}
.alert.info { background: var(--primary-light); color: var(--primary-dark); }
.alert.success { background: var(--success-light); color: var(--success); }
.alert.warning { background: var(--warning-light); color: var(--warning); }
.alert.danger { background: var(--danger-light); color: var(--danger); }

/* Meal tabs */
.meal-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  background: var(--gray-100);
  border-radius: var(--radius);
  padding: 4px;
}

.meal-tab {
  padding: 8px 20px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--gray-600);
  transition: all 0.2s;
  border: none;
  background: none;
  font-family: inherit;
}

.meal-tab.active {
  background: white;
  color: var(--primary);
  box-shadow: var(--shadow);
}

.meal-tab:hover:not(.active) {
  color: var(--gray-800);
}

/* Grid layout */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal {
  background: white;
  border-radius: var(--radius);
  padding: 24px;
  width: 90%;
  max-width: 600px;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: var(--shadow-md);
}

.modal h3 {
  margin-bottom: 16px;
  font-size: 1.2rem;
}

.modal-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 20px;
}

/* Print styles */
.print-only { display: none; }

@media print {
  .sidebar, .toolbar, .btn, .nav-menu { display: none !important; }
  .main-content { margin-left: 0 !important; padding: 0 !important; }
  .print-only { display: block; }
  .card { box-shadow: none; border: 1px solid #ddd; }
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-content {
    margin-left: 0;
  }
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* Menu editor inline inputs */
.ingredient-row input[type="text"],
.ingredient-row input[type="number"] {
  padding: 4px 6px;
  font-size: 0.85rem;
  border: 1px solid var(--gray-200);
  border-radius: 4px;
  transition: border-color 0.2s;
}

.ingredient-row input:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.1);
}

.ingredient-row input:hover {
  border-color: var(--gray-400);
}

.menu-row:hover {
  background: var(--gray-50);
}

.menu-row td {
  padding: 8px 10px;
}

/* Ingredient calculation detail row */
.detail-row {
  background: var(--gray-50);
  font-size: 0.85rem;
  color: var(--gray-600);
}

.detail-row td {
  padding: 6px 12px 6px 36px;
  border-bottom: 1px solid var(--gray-100);
}

/* Search */
.search-input {
  position: relative;
}

.search-input input {
  padding-left: 36px;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 40px;
  color: var(--gray-400);
}

.empty-state .icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

/* PO print layout */
.po-header {
  text-align: center;
  margin-bottom: 20px;
}

.po-header h2 {
  font-size: 1.1rem;
}

.po-header p {
  font-size: 0.85rem;
  color: var(--gray-600);
}

.po-info {
  display: flex;
  justify-content: space-between;
  margin-bottom: 16px;
  font-size: 0.9rem;
}

.signature-area {
  display: flex;
  justify-content: space-around;
  margin-top: 40px;
  font-size: 0.9rem;
}

.signature-area div {
  text-align: center;
}

.signature-line {
  border-bottom: 1px solid var(--gray-400);
  width: 200px;
  margin: 40px auto 8px;
}

/* Loading spinner */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  color: var(--gray-400);
}

.spinner {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 3px solid var(--gray-200);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-right: 8px;
}

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

/* Toast */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 2000;
}

.toast {
  background: var(--gray-800);
  color: white;
  padding: 12px 20px;
  border-radius: var(--radius);
  margin-bottom: 8px;
  box-shadow: var(--shadow-md);
  animation: slideIn 0.3s;
  font-size: 0.9rem;
}

.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }

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

/* Number alignment */
.text-right {
  text-align: right;
}

.text-center {
  text-align: center;
}

.font-mono {
  font-family: 'Courier New', monospace;
}