:root {
  /* Primitive Color Tokens */
  --color-white: rgba(255, 255, 255, 1);
  --color-black: rgba(0, 0, 0, 1);
  --color-cream-50: rgba(252, 252, 249, 1);
  --color-cream-100: rgba(255, 255, 253, 1);
  --color-gray-200: rgba(245, 245, 245, 1);
  --color-gray-300: rgba(167, 169, 169, 1);
  --color-gray-400: rgba(119, 124, 124, 1);
  --color-slate-500: rgba(98, 108, 113, 1);
  --color-brown-600: rgba(94, 82, 64, 1);
  --color-charcoal-700: rgba(31, 33, 33, 1);
  --color-charcoal-800: rgba(38, 40, 40, 1);
  --color-slate-900: rgba(19, 52, 59, 1);
  --color-teal-300: rgba(50, 184, 198, 1);
  --color-teal-400: rgba(45, 166, 178, 1);
  --color-teal-500: rgba(33, 128, 141, 1);
  --color-teal-600: rgba(29, 116, 128, 1);
  --color-teal-700: rgba(26, 104, 115, 1);
  --color-teal-800: rgba(41, 150, 161, 1);
  --color-red-400: rgba(255, 84, 89, 1);
  --color-red-500: rgba(192, 21, 47, 1);
  --color-orange-400: rgba(230, 129, 97, 1);
  --color-orange-500: rgba(168, 75, 47, 1);

  /* RGB versions for opacity control */
  --color-brown-600-rgb: 94, 82, 64;
  --color-teal-500-rgb: 33, 128, 141;
  --color-slate-900-rgb: 19, 52, 59;
  --color-slate-500-rgb: 98, 108, 113;
  --color-red-500-rgb: 192, 21, 47;
  --color-red-400-rgb: 255, 84, 89;
  --color-orange-500-rgb: 168, 75, 47;
  --color-orange-400-rgb: 230, 129, 97;

  /* Background color tokens (Light Mode) */
  --color-bg-1: rgba(59, 130, 246, 0.08); /* Light blue */
  --color-bg-2: rgba(245, 158, 11, 0.08); /* Light yellow */
  --color-bg-3: rgba(34, 197, 94, 0.08); /* Light green */
  --color-bg-4: rgba(239, 68, 68, 0.08); /* Light red */
  --color-bg-5: rgba(147, 51, 234, 0.08); /* Light purple */
  --color-bg-6: rgba(249, 115, 22, 0.08); /* Light orange */
  --color-bg-7: rgba(236, 72, 153, 0.08); /* Light pink */
  --color-bg-8: rgba(6, 182, 212, 0.08); /* Light cyan */

  /* Semantic Color Tokens (Light Mode) */
  --color-background: var(--color-cream-50);
  --color-surface: var(--color-cream-100);
  --color-text: var(--color-charcoal-700);
  --color-text-secondary: var(--color-slate-500);
  --color-primary: var(--color-teal-500);
  --color-primary-hover: var(--color-teal-600);
  --color-secondary: var(--color-slate-500);
  --color-accent: var(--color-teal-300);
  --color-success: rgba(34, 197, 94, 1);
  --color-warning: rgba(245, 158, 11, 1);
  --color-error: var(--color-red-500);
  --color-border: var(--color-gray-300);
  --color-shadow: rgba(var(--color-slate-900-rgb), 0.1);
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: var(--color-background);
  color: var(--color-text);
  line-height: 1.6;
}

/* Login Screen */
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-teal-700));
  padding: 1rem;
}

.login-container {
  background: var(--color-surface);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 20px 40px rgba(var(--color-slate-900-rgb), 0.15);
  width: 100%;
  max-width: 400px;
}

.login-logo {
  text-align: center;
  margin-bottom: 2rem;
}

.login-logo i {
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.login-logo h1 {
  color: var(--color-text);
  margin-bottom: 0.5rem;
  font-size: 1.8rem;
}

.login-logo p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.9rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid var(--color-border);
  border-radius: 6px;
  font-size: 1rem;
  transition: border-color 0.2s ease;
  background: var(--color-surface);
  color: var(--color-text);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(var(--color-teal-500-rgb), 0.1);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
  min-height: 44px;
}

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

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

.btn--secondary {
  background: var(--color-gray-200);
  color: var(--color-text);
}

.btn--secondary:hover {
  background: var(--color-gray-300);
}

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

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

.btn--info {
  background: var(--color-teal-300);
  color: white;
}

.btn--full-width {
  width: 100%;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

.forgot-password {
  display: block;
  text-align: center;
  margin-top: 1rem;
  color: var(--color-primary);
  text-decoration: none;
  font-size: 0.9rem;
}

.forgot-password:hover {
  text-decoration: underline;
}

/* Auth Links */
.auth-links {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  font-size: 0.9rem;
}

.auth-links a {
  color: var(--color-primary);
  text-decoration: none;
}

.auth-links a:hover {
  text-decoration: underline;
}

.auth-links .separator {
  color: var(--color-text-secondary);
}

/* Form Hints */
.form-hint {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

/* Success Message */
.success-message {
  text-align: center;
  padding: 2rem;
}

.success-message i {
  margin-bottom: 1rem;
}

.success-message h3 {
  color: var(--color-text);
  margin-bottom: 1rem;
}

.success-message p {
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
}

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

.sidebar {
  width: 280px;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  overflow-y: auto;
  z-index: 100;
}

.sidebar-header {
  padding: 2rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.sidebar-header i {
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.sidebar-header h3 {
  color: var(--color-text);
  font-size: 1.2rem;
}

.sidebar-menu {
  list-style: none;
  padding: 1rem 0;
}

.sidebar-menu li {
  margin-bottom: 0.25rem;
}

.menu-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.5rem;
  color: var(--color-text);
  text-decoration: none;
  transition: all 0.2s ease;
  border-left: 3px solid transparent;
}

.menu-item:hover {
  background: rgba(var(--color-teal-500-rgb), 0.08);
  border-left-color: var(--color-primary);
}

.menu-item.active {
  background: rgba(var(--color-teal-500-rgb), 0.12);
  border-left-color: var(--color-primary);
  color: var(--color-primary);
  font-weight: 500;
}

.menu-item i {
  width: 20px;
  text-align: center;
}

/* Main Content */
.main-content {
  flex: 1;
  margin-left: 280px;
  padding: 2rem;
  min-height: 100vh;
  background: var(--color-background);
}

/* Screen Management */
.screen {
  display: none;
}

.screen.active {
  display: block;
}

.screen-header {
  margin-bottom: 2rem;
  display: flex;
  justify-content: between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.screen-header h1 {
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0;
  flex: 1;
}

.screen-header p {
  color: var(--color-text-secondary);
  margin-top: 0.25rem;
  font-size: 0.9rem;
}

/* Metrics Cards */
.metrics-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.metric-card {
  background: var(--color-surface);
  border-radius: 12px;
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: 0 2px 8px rgba(var(--color-slate-900-rgb), 0.08);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.metric-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(var(--color-slate-900-rgb), 0.12);
}

.metric-card__icon {
  width: 60px;
  height: 60px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
}

.metric-card--primary .metric-card__icon {
  background: var(--color-primary);
}

.metric-card--success .metric-card__icon {
  background: var(--color-success);
}

.metric-card--info .metric-card__icon {
  background: var(--color-teal-300);
}

.metric-card--warning .metric-card__icon {
  background: var(--color-warning);
}

.metric-card__info h3 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
  color: var(--color-text);
}

.metric-card__info p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin: 0;
}

/* Charts */
.dashboard-charts {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.chart-container {
  background: var(--color-surface);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 2px 8px rgba(var(--color-slate-900-rgb), 0.08);
}

.chart-container h3 {
  margin-bottom: 1rem;
  color: var(--color-text);
  font-size: 1.1rem;
}

.chart-container canvas {
  max-height: 300px;
}

/* Tables */
.table-container {
  background: var(--color-surface);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(var(--color-slate-900-rgb), 0.08);
}

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

.data-table th {
  background: rgba(var(--color-teal-500-rgb), 0.08);
  padding: 1rem;
  text-align: left;
  font-weight: 600;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
}

.data-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: 0.9rem;
}

.data-table tbody tr:hover {
  background: rgba(var(--color-teal-500-rgb), 0.04);
}

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

/* Status badges */
.status {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
}

.status--success {
  background: rgba(34, 197, 94, 0.15);
  color: rgba(34, 197, 94, 1);
}

.status--warning {
  background: rgba(245, 158, 11, 0.15);
  color: rgba(245, 158, 11, 1);
}

.status--error {
  background: rgba(var(--color-red-500-rgb), 0.15);
  color: var(--color-red-500);
}

/* Recent Notes */
.recent-notes {
  background: var(--color-surface);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 2px 8px rgba(var(--color-slate-900-rgb), 0.08);
}

.recent-notes h3 {
  margin-bottom: 1rem;
  color: var(--color-text);
  font-size: 1.1rem;
}

/* Search and Filters */
.filters {
  margin-bottom: 2rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.search-box {
  position: relative;
  flex: 1;
  min-width: 200px;
  max-width: 400px;
}

.search-box input {
  padding-right: 3rem;
}

.search-box i {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-secondary);
}

/* Form Grid */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.form-group--full {
  grid-column: 1 / -1;
}

.form-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Modals */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
}

.modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-content {
  background: var(--color-surface);
  border-radius: 12px;
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 40px rgba(var(--color-slate-900-rgb), 0.2);
  animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: scale(0.9) translateY(-50px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

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

.modal-header h2 {
  margin: 0;
  color: var(--color-text);
  font-size: 1.3rem;
}

.close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  transition: all 0.2s ease;
}

.close:hover {
  color: var(--color-text);
  background: var(--color-border);
}

.modal-body {
  padding: 1.5rem;
}

.modal-footer {
  padding: 1.5rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
  flex-wrap: wrap;
}

/* Simulation Result */
.simulation-result {
  background: var(--color-surface);
  border-radius: 12px;
  padding: 1.5rem;
  margin-top: 2rem;
  box-shadow: 0 2px 8px rgba(var(--color-slate-900-rgb), 0.08);
}

.simulation-result h3 {
  color: var(--color-text);
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.xml-preview {
  background: #f8f9fa;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 1rem;
  margin-top: 1rem;
  font-family: 'Courier New', monospace;
  font-size: 0.8rem;
  max-height: 400px;
  overflow-y: auto;
  white-space: pre-wrap;
  color: #333;
}

/* Certificate Upload */
.certificate-upload {
  background: var(--color-surface);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: 0 2px 8px rgba(var(--color-slate-900-rgb), 0.08);
}

.certificate-info {
  background: var(--color-surface);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 2px 8px rgba(var(--color-slate-900-rgb), 0.08);
}

.certificate-info h3 {
  color: var(--color-text);
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.empty-state {
  text-align: center;
  color: var(--color-text-secondary);
  font-style: italic;
  padding: 2rem;
}

/* Formula Groups */
.formula-group {
  background: var(--color-surface);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 2px 8px rgba(var(--color-slate-900-rgb), 0.08);
}

.formula-group h4 {
  color: var(--color-text);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.formula-list {
  display: grid;
  gap: 0.75rem;
}

.formula-item {
  background: rgba(var(--color-teal-500-rgb), 0.04);
  border: 1px solid rgba(var(--color-teal-500-rgb), 0.1);
  border-radius: 6px;
  padding: 0.75rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.5rem;
  font-size: 0.9rem;
}

.formula-field {
  display: flex;
  flex-direction: column;
}

.formula-field strong {
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  text-transform: uppercase;
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.formula-field span {
  color: var(--color-text);
  font-weight: 600;
}

/* Utilities */
.hidden {
  display: none !important;
}

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

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

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: 0.5rem !important; }
.mb-2 { margin-bottom: 1rem !important; }
.mb-3 { margin-bottom: 1.5rem !important; }

.mt-0 { margin-top: 0 !important; }
.mt-1 { margin-top: 0.5rem !important; }
.mt-2 { margin-top: 1rem !important; }
.mt-3 { margin-top: 1.5rem !important; }

/* Action Buttons in Tables */
.action-buttons {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.action-buttons .btn {
  padding: 0.375rem 0.75rem;
  font-size: 0.8rem;
  min-height: auto;
}

/* Loading States */
.loading {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.loading::after {
  content: '';
  width: 16px;
  height: 16px;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Responsive Design */
@media (max-width: 768px) {
  .main-app {
    flex-direction: column;
  }

  .sidebar {
    position: relative;
    width: 100%;
    height: auto;
  }

  .main-content {
    margin-left: 0;
    padding: 1rem;
  }

  .dashboard-charts {
    grid-template-columns: 1fr;
  }

  .metrics-cards {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }

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

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

  .filters {
    flex-direction: column;
  }

  .search-box {
    max-width: 100%;
  }

  .modal-content {
    margin: 0.5rem;
    max-width: none;
  }

  .action-buttons {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .login-container {
    padding: 1.5rem;
    margin: 0.5rem;
  }

  .sidebar-header {
    padding: 1.5rem 1rem;
  }

  .main-content {
    padding: 0.75rem;
  }

  .metrics-cards {
    grid-template-columns: 1fr;
  }

  .metric-card {
    padding: 1rem;
  }

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

  .data-table {
    min-width: 600px;
  }

  .modal-header,
  .modal-body,
  .modal-footer {
    padding: 1rem;
  }
}

/* Print Styles */
@media print {
  .sidebar,
  .screen-header button,
  .action-buttons,
  .filters {
    display: none !important;
  }

  .main-content {
    margin-left: 0;
    padding: 0;
  }

  .screen {
    display: block !important;
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  :root {
    --color-border: #000;
    --color-text-secondary: #333;
  }

  .form-control:focus {
    border-width: 3px;
  }

  .btn {
    border: 2px solid currentColor;
  }
}

/* Campos específicos da NF-e Estadual */
.campos-estadual {
  background: rgba(var(--color-teal-500-rgb), 0.04);
  border: 1px solid rgba(var(--color-teal-500-rgb), 0.1);
  border-radius: 8px;
  padding: 1.5rem;
  margin-top: 1rem;
}

.campos-estadual.hidden {
  display: none;
}

.campos-estadual .form-group {
  margin-bottom: 1rem;
}

.campos-estadual .form-label {
  color: var(--color-primary);
  font-weight: 600;
}