/**
 * Estilos para la bandeja de revisión de aprendizaje DSL v2.
 * Aislamiento deliberado: no importa ni reutiliza estilos globales.
 */

/* ============================================================================
   Variables de diseño
   ============================================================================ */

:root {
  --lu-color-bg: #ffffff;
  --lu-color-fg: #1f2937;
  --lu-color-fg-light: #6b7280;
  --lu-color-border: #d1d5db;
  --lu-color-border-light: #e5e7eb;
  --lu-color-focus: #3b82f6;
  --lu-color-error-bg: #fef2f2;
  --lu-color-error-fg: #991b1b;
  --lu-color-success-bg: #f0fdf4;
  --lu-color-success-fg: #15803d;
  --lu-color-button-primary: #3b82f6;
  --lu-color-button-primary-hover: #2563eb;
  --lu-color-button-danger: #dc2626;
  --lu-color-button-danger-hover: #b91c1c;
  --lu-color-button-disabled: #d1d5db;
  --lu-space-xs: 0.25rem;
  --lu-space-sm: 0.5rem;
  --lu-space-md: 1rem;
  --lu-space-lg: 1.5rem;
  --lu-space-xl: 2rem;
  --lu-font-size-xs: 0.75rem;
  --lu-font-size-sm: 0.875rem;
  --lu-font-size-base: 1rem;
  --lu-font-size-lg: 1.125rem;
  --lu-font-size-xl: 1.25rem;
  --lu-radius: 0.375rem;
  --lu-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --lu-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --lu-transition: 150ms cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --lu-color-bg: #111827;
    --lu-color-fg: #f3f4f6;
    --lu-color-fg-light: #d1d5db;
    --lu-color-border: #374151;
    --lu-color-border-light: #4b5563;
    --lu-color-error-bg: #7f1d1d;
    --lu-color-error-fg: #fecaca;
    --lu-color-success-bg: #064e3b;
    --lu-color-success-fg: #86efac;
  }
}

:root[data-theme='dark'] {
  --lu-color-bg: #111827;
  --lu-color-fg: #f3f4f6;
  --lu-color-fg-light: #d1d5db;
  --lu-color-border: #374151;
  --lu-color-border-light: #4b5563;
  --lu-color-error-bg: #7f1d1d;
  --lu-color-error-fg: #fecaca;
  --lu-color-success-bg: #064e3b;
  --lu-color-success-fg: #86efac;
}

:root[data-theme='light'] {
  --lu-color-bg: #ffffff;
  --lu-color-fg: #1f2937;
  --lu-color-fg-light: #6b7280;
  --lu-color-border: #d1d5db;
  --lu-color-border-light: #e5e7eb;
  --lu-color-error-bg: #fef2f2;
  --lu-color-error-fg: #991b1b;
  --lu-color-success-bg: #f0fdf4;
  --lu-color-success-fg: #15803d;
}

/* ============================================================================
   Reset y base
   ============================================================================ */

.lu-root {
  background-color: var(--lu-color-bg);
  color: var(--lu-color-fg);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: var(--lu-font-size-base);
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 100vh;
  position: relative;
}

.lu-root * {
  box-sizing: border-box;
}

.lu-root input,
.lu-root select,
.lu-root textarea,
.lu-root button {
  font: inherit;
}

.lu-root button {
  cursor: pointer;
}

.lu-root button:disabled {
  cursor: not-allowed;
}

/* ============================================================================
   Tabs
   ============================================================================ */

.lu-tabs {
  display: flex;
  gap: var(--lu-space-xs);
  border-bottom: 1px solid var(--lu-color-border);
  padding: var(--lu-space-md);
  background-color: var(--lu-color-bg);
  flex-wrap: wrap;
}

.lu-tab {
  padding: var(--lu-space-sm) var(--lu-space-md);
  border: none;
  background: transparent;
  color: var(--lu-color-fg-light);
  font-size: var(--lu-font-size-sm);
  font-weight: 500;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  position: relative;
  transition: color var(--lu-transition), border-color var(--lu-transition);
}

.lu-tab:hover:not(:disabled) {
  color: var(--lu-color-fg);
}

.lu-tab:focus-visible {
  outline: 2px solid var(--lu-color-focus);
  outline-offset: 2px;
}

.lu-tab.lu-focus {
  outline: 2px solid var(--lu-color-focus);
  outline-offset: 2px;
}

.lu-tab-active {
  color: var(--lu-color-fg);
  border-bottom-color: var(--lu-color-button-primary);
}

.lu-reduced-motion .lu-tab {
  transition: none;
}

/* ============================================================================
   Paneles y secciones
   ============================================================================ */

.lu-panels {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.lu-section {
  padding: var(--lu-space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--lu-space-lg);
  height: 100%;
}

.lu-section[hidden] {
  display: none;
}

/* ============================================================================
   Filtros
   ============================================================================ */

.lu-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--lu-space-md);
  padding: var(--lu-space-md);
  background-color: var(--lu-color-bg);
  border: 1px solid var(--lu-color-border-light);
  border-radius: var(--lu-radius);
}

.lu-control {
  display: flex;
  flex-direction: column;
  gap: var(--lu-space-sm);
  flex: 1;
  min-width: 200px;
}

.lu-control label {
  font-size: var(--lu-font-size-sm);
  font-weight: 500;
  color: var(--lu-color-fg);
}

.lu-control input,
.lu-control select {
  padding: var(--lu-space-sm) var(--lu-space-md);
  border: 1px solid var(--lu-color-border);
  border-radius: var(--lu-radius);
  background-color: var(--lu-color-bg);
  color: var(--lu-color-fg);
  font-size: var(--lu-font-size-sm);
  transition: border-color var(--lu-transition), box-shadow var(--lu-transition);
}

.lu-control input:focus,
.lu-control select:focus {
  outline: none;
  border-color: var(--lu-color-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.lu-control input:disabled,
.lu-control select:disabled {
  background-color: var(--lu-color-border-light);
  color: var(--lu-color-fg-light);
  cursor: not-allowed;
}

.lu-control.lu-focus input,
.lu-control.lu-focus select {
  border-color: var(--lu-color-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.lu-reduced-motion .lu-control input,
.lu-reduced-motion .lu-control select {
  transition: none;
}

/* ============================================================================
   Layout de dos columnas
   ============================================================================ */

.lu-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--lu-space-lg);
  flex: 1;
  min-height: 0;
}

@media (max-width: 1024px) {
  .lu-columns {
    grid-template-columns: 1fr;
  }
}

.lu-list,
.lu-detail {
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--lu-space-md);
  padding: var(--lu-space-md);
  border: 1px solid var(--lu-color-border-light);
  border-radius: var(--lu-radius);
  background-color: var(--lu-color-bg);
}

.lu-list {
  min-width: 0;
}

.lu-detail {
  min-width: 0;
}

/* ============================================================================
   Listas de items
   ============================================================================ */

.lu-item-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--lu-space-sm);
}

.lu-proposal-item,
.lu-signal-item {
  display: flex;
  flex-direction: column;
  gap: var(--lu-space-xs);
}

.lu-item-button {
  all: unset;
  display: flex;
  flex-direction: column;
  gap: var(--lu-space-xs);
  padding: var(--lu-space-md);
  border: 1px solid var(--lu-color-border-light);
  border-radius: var(--lu-radius);
  background-color: var(--lu-color-bg);
  color: var(--lu-color-fg);
  cursor: pointer;
  transition: background-color var(--lu-transition), border-color var(--lu-transition), box-shadow var(--lu-transition);
  text-align: left;
}

.lu-item-button:hover {
  background-color: var(--lu-color-border-light);
  border-color: var(--lu-color-border);
}

.lu-item-button:focus-visible {
  outline: 2px solid var(--lu-color-focus);
  outline-offset: -2px;
}

.lu-item-button.lu-focus {
  background-color: var(--lu-color-border-light);
  box-shadow: inset 0 0 0 2px var(--lu-color-focus);
}

.lu-reduced-motion .lu-item-button {
  transition: none;
}

/* ============================================================================
   Campos
   ============================================================================ */

.lu-field {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: var(--lu-space-md);
  padding: var(--lu-space-sm) 0;
  border-bottom: 1px solid var(--lu-color-border-light);
  word-break: break-word;
}

.lu-field:last-child {
  border-bottom: none;
}

.lu-field-label {
  font-weight: 600;
  font-size: var(--lu-font-size-sm);
  color: var(--lu-color-fg);
}

.lu-field-value {
  color: var(--lu-color-fg-light);
  font-size: var(--lu-font-size-sm);
  font-family: 'Monaco', 'Courier New', monospace;
  white-space: pre-wrap;
  overflow-wrap: break-word;
}

/* ============================================================================
   Botones
   ============================================================================ */

.lu-button {
  padding: var(--lu-space-sm) var(--lu-space-md);
  border: 1px solid var(--lu-color-border);
  border-radius: var(--lu-radius);
  background-color: var(--lu-color-bg);
  color: var(--lu-color-fg);
  font-size: var(--lu-font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--lu-transition);
  display: inline-block;
  text-align: center;
  white-space: nowrap;
}

.lu-button:hover:not(:disabled) {
  background-color: var(--lu-color-border-light);
  border-color: var(--lu-color-border);
}

.lu-button:focus-visible {
  outline: 2px solid var(--lu-color-focus);
  outline-offset: 2px;
}

.lu-button:disabled {
  background-color: var(--lu-color-button-disabled);
  color: var(--lu-color-fg-light);
  cursor: not-allowed;
  opacity: 0.6;
}

.lu-button-primary {
  background-color: var(--lu-color-button-primary);
  color: #ffffff;
  border-color: var(--lu-color-button-primary);
}

.lu-button-primary:hover:not(:disabled) {
  background-color: var(--lu-color-button-primary-hover);
  border-color: var(--lu-color-button-primary-hover);
}

.lu-button-danger {
  background-color: var(--lu-color-button-danger);
  color: #ffffff;
  border-color: var(--lu-color-button-danger);
}

.lu-button-danger:hover:not(:disabled) {
  background-color: var(--lu-color-button-danger-hover);
  border-color: var(--lu-color-button-danger-hover);
}

.lu-button.lu-focus {
  outline: 2px solid var(--lu-color-focus);
  outline-offset: 2px;
}

.lu-reduced-motion .lu-button {
  transition: none;
}

/* ============================================================================
   Errores y estados
   ============================================================================ */

.lu-error {
  padding: var(--lu-space-md);
  border-radius: var(--lu-radius);
  background-color: var(--lu-color-error-bg);
  color: var(--lu-color-error-fg);
  border: 1px solid var(--lu-color-error-fg);
  display: flex;
  flex-direction: column;
  gap: var(--lu-space-sm);
}

.lu-error strong {
  font-weight: 700;
}

.lu-status {
  padding: var(--lu-space-md);
  color: var(--lu-color-fg-light);
  font-size: var(--lu-font-size-sm);
  margin: 0;
  font-style: italic;
}

/* ============================================================================
   Paneles modales
   ============================================================================ */

.lu-panel {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: var(--lu-color-bg);
  border: 1px solid var(--lu-color-border);
  border-radius: var(--lu-radius);
  box-shadow: var(--lu-shadow-md), 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  max-width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  padding: var(--lu-space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--lu-space-md);
  animation: lu-panel-in 200ms ease-out;
}

@keyframes lu-panel-in {
  from {
    opacity: 0;
    transform: translate(-50%, -48%);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%);
  }
}

.lu-reduced-motion .lu-panel {
  animation: none;
}

.lu-panel::backdrop {
  background-color: rgba(0, 0, 0, 0.5);
}

/* Overlay detrás del panel (alternativa sin ::backdrop) */
.lu-panel::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: -1;
}

.lu-panel h3 {
  margin: 0;
  font-size: var(--lu-font-size-lg);
  font-weight: 700;
  color: var(--lu-color-fg);
}

.lu-panel h4 {
  margin: 0;
  font-size: var(--lu-font-size-base);
  font-weight: 600;
  color: var(--lu-color-fg);
}

/* ============================================================================
   Fieldsets y checklists
   ============================================================================ */

.lu-checklist {
  border: 1px solid var(--lu-color-border-light);
  border-radius: var(--lu-radius);
  padding: var(--lu-space-md);
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--lu-space-sm);
}

.lu-checklist legend {
  font-weight: 600;
  font-size: var(--lu-font-size-sm);
  color: var(--lu-color-fg);
  padding: 0 var(--lu-space-sm);
}

.lu-checkbox-row {
  display: flex;
  align-items: center;
  gap: var(--lu-space-sm);
}

.lu-checkbox-row input[type='checkbox'] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--lu-color-button-primary);
}

.lu-checkbox-row label {
  cursor: pointer;
  font-size: var(--lu-font-size-sm);
  color: var(--lu-color-fg);
  flex: 1;
}

.lu-checkbox-row input[type='checkbox']:focus-visible + label {
  outline: 2px solid var(--lu-color-focus);
  outline-offset: 2px;
}

/* ============================================================================
   Páginación
   ============================================================================ */

.lu-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--lu-space-md);
  padding: var(--lu-space-md) 0;
  border-top: 1px solid var(--lu-color-border-light);
  margin-top: var(--lu-space-md);
  flex-wrap: wrap;
}

.lu-pagination-total {
  font-size: var(--lu-font-size-sm);
  color: var(--lu-color-fg-light);
  min-width: 80px;
  text-align: center;
}

/* ============================================================================
   Acciones
   ============================================================================ */

.lu-actions {
  display: flex;
  gap: var(--lu-space-md);
  padding: var(--lu-space-md) 0;
  border-top: 1px solid var(--lu-color-border-light);
  flex-wrap: wrap;
}

/* ============================================================================
   Secciones especializadas
   ============================================================================ */

.lu-primitives {
  display: flex;
  flex-direction: column;
  gap: var(--lu-space-md);
  padding: var(--lu-space-md);
  background-color: var(--lu-color-bg);
  border: 1px solid var(--lu-color-border-light);
  border-radius: var(--lu-radius);
  margin-top: var(--lu-space-md);
}

.lu-primitives h4 {
  margin: 0;
  font-size: var(--lu-font-size-base);
  font-weight: 600;
}

.lu-decision-confirmation {
  padding: var(--lu-space-md);
  background-color: var(--lu-color-success-bg);
  border: 1px solid var(--lu-color-success-fg);
  border-radius: var(--lu-radius);
  display: flex;
  flex-direction: column;
  gap: var(--lu-space-sm);
  color: var(--lu-color-success-fg);
  margin-top: var(--lu-space-md);
}

.lu-observations {
  display: flex;
  flex-direction: column;
  gap: var(--lu-space-md);
  padding: var(--lu-space-md);
  background-color: var(--lu-color-bg);
  border: 1px solid var(--lu-color-border-light);
  border-radius: var(--lu-radius);
}

.lu-observations h4 {
  margin: 0;
  font-size: var(--lu-font-size-base);
  font-weight: 600;
}

.lu-observation-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--lu-space-md);
}

.lu-observation-item {
  display: flex;
  flex-direction: column;
  gap: var(--lu-space-sm);
  padding: var(--lu-space-md);
  border: 1px solid var(--lu-color-border-light);
  border-radius: var(--lu-radius);
  background-color: var(--lu-color-bg);
}

.lu-source-ready {
  padding: var(--lu-space-sm) var(--lu-space-md);
  background-color: var(--lu-color-success-bg);
  color: var(--lu-color-success-fg);
  border-radius: var(--lu-radius);
  font-size: var(--lu-font-size-sm);
  margin: 0;
}

.lu-attempts-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--lu-font-size-sm);
}

.lu-attempts-table thead {
  background-color: var(--lu-color-border-light);
}

.lu-attempts-table th {
  padding: var(--lu-space-md);
  text-align: left;
  font-weight: 600;
  color: var(--lu-color-fg);
  border: 1px solid var(--lu-color-border);
}

.lu-attempts-table td {
  padding: var(--lu-space-md);
  border: 1px solid var(--lu-color-border-light);
  color: var(--lu-color-fg-light);
  font-family: 'Monaco', 'Courier New', monospace;
  white-space: pre-wrap;
  word-break: break-word;
}

.lu-attempts-table tbody tr:hover {
  background-color: var(--lu-color-border-light);
}

.lu-honest-note {
  padding: var(--lu-space-md);
  background-color: var(--lu-color-border-light);
  color: var(--lu-color-fg-light);
  font-size: var(--lu-font-size-sm);
  border-radius: var(--lu-radius);
  margin: var(--lu-space-md) 0;
  line-height: 1.6;
}

.lu-ack-result {
  padding: var(--lu-space-md);
  background-color: var(--lu-color-success-bg);
  border: 1px solid var(--lu-color-success-fg);
  border-radius: var(--lu-radius);
  display: flex;
  flex-direction: column;
  gap: var(--lu-space-sm);
  color: var(--lu-color-success-fg);
  margin-top: var(--lu-space-md);
}

/* ============================================================================
   Accesibilidad
   ============================================================================ */

@media (prefers-reduced-motion: reduce) {
  .lu-root * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (max-width: 640px) {
  .lu-root {
    font-size: var(--lu-font-size-sm);
  }

  .lu-tabs {
    padding: var(--lu-space-sm);
    gap: 0;
  }

  .lu-tab {
    padding: var(--lu-space-sm);
    font-size: var(--lu-font-size-xs);
  }

  .lu-section {
    padding: var(--lu-space-md);
    gap: var(--lu-space-md);
  }

  .lu-field {
    grid-template-columns: 1fr;
    gap: var(--lu-space-xs);
  }

  .lu-field-label {
    font-weight: 700;
  }

  .lu-panel {
    max-width: 95%;
    max-height: 95vh;
    padding: var(--lu-space-md);
  }

  .lu-columns {
    grid-template-columns: 1fr;
    gap: var(--lu-space-md);
  }
}