/**
 * css/styles.css
 * Estilos modernos, responsivos y profesionales para el Dashboard Analítico.
 */

:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --primary-focus: rgba(37, 99, 235, 0.15);

  --bg-app: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #fcfdfe;
  --bg-input: #ffffff;
  --bg-muted: #f1f5f9;

  --border-color: #e2e8f0;
  --border-focus: #93c5fd;

  --text-main: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-light: #94a3b8;

  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #06b6d4;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.07), 0 4px 6px -4px rgba(0, 0, 0, 0.05);

  --sidebar-width: 330px;
  --header-height: 64px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset básico */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-app);
  color: var(--text-main);
  line-height: 1.5;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

/* Header Superior */
.app-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: #ffffff;
  border-bottom: 1px solid var(--border-color);
  padding: 0 24px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-toggle-btn {
  background: var(--bg-muted);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: all var(--transition-fast);
}

.sidebar-toggle-btn:hover {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--border-focus);
}

.brand-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary), #3b82f6);
  color: #ffffff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.25);
}

.brand-info h1 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}

.brand-info p {
  font-size: 11px;
  color: var(--text-muted);
}

/* Tabs de navegación */
.nav-tabs {
  display: flex;
  gap: 6px;
  background-color: var(--bg-muted);
  padding: 4px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.tab-btn {
  background: transparent;
  border: none;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  color: var(--text-main);
}

.tab-btn.active {
  background-color: #ffffff;
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.header-status {
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge-live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: #ecfdf5;
  color: #065f46;
  border: 1px solid #a7f3d0;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 500;
}

.live-dot {
  width: 7px;
  height: 7px;
  background: var(--success);
  border-radius: 50%;
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.6); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* Sidebar Lateral */
.app-sidebar {
  width: var(--sidebar-width);
  background-color: #ffffff;
  border-right: 1px solid var(--border-color);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  height: calc(100vh - var(--header-height));
  position: sticky;
  top: var(--header-height);
  overflow-y: auto;
  transition: width var(--transition-fast), margin var(--transition-fast);
  z-index: 30;
}

.app-sidebar.collapsed {
  margin-left: calc(-1 * var(--sidebar-width));
}

.sidebar-content {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sidebar-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-section:last-child {
  border-bottom: none;
}

.section-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* File Upload Card */
.file-upload-box {
  background-color: var(--bg-app);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px;
  text-align: center;
  transition: border-color var(--transition-fast);
}

.file-upload-box:hover {
  border-color: var(--primary);
}

.file-upload-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.file-upload-label:hover {
  background-color: var(--primary-light);
  border-color: var(--border-focus);
}

.file-name-display {
  margin-top: 6px;
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Form Controls */
.filter-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.filter-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.custom-select {
  width: 100%;
  padding: 8px 12px;
  font-size: 12px;
  color: var(--text-main);
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  outline: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.custom-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-focus);
}

/* Chips Filter */
.chips-container {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}

.filter-chip {
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 500;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  background: var(--bg-app);
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
  transition: all var(--transition-fast);
}

.filter-chip:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.filter-chip.active {
  background-color: var(--primary-light);
  color: var(--primary);
  border-color: var(--border-focus);
  font-weight: 600;
}

/* Slider */
.slider-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 4px 0;
}

.slider-values {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
}

.slider-values span {
  background: var(--bg-muted);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.badge-conocimiento {
  background: var(--primary-light);
  color: var(--primary);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 12px;
  border: 1px solid var(--border-focus);
}

.range-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 10px;
  border-radius: 6px;
  background: #cbd5e1;
  outline: none;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.range-slider:focus {
  background: #93c5fd;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #ffffff;
  border: 4px solid var(--primary);
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.35);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 0 0 6px rgba(37, 99, 235, 0.18);
}

.range-slider::-webkit-slider-thumb:active {
  transform: scale(1.25);
  box-shadow: 0 0 0 8px rgba(37, 99, 235, 0.25);
}

/* Firefox support */
.range-slider::-moz-range-track {
  width: 100%;
  height: 10px;
  border-radius: 6px;
  background: #cbd5e1;
  border: none;
}

.range-slider::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #ffffff;
  border: 4px solid var(--primary);
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.35);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.range-slider::-moz-range-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 0 0 6px rgba(37, 99, 235, 0.18);
}

/* Quick Filter Buttons */
.quick-buttons-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
}

.quick-btn {
  padding: 6px 4px;
  font-size: 11px;
  font-weight: 500;
  text-align: center;
  border: 1px solid var(--border-color);
  background: var(--bg-app);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.quick-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.quick-btn.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
  font-weight: 600;
}

/* Sidebar Actions */
.sidebar-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.btn-reset {
  width: 100%;
  padding: 8px;
  font-size: 12px;
  font-weight: 600;
  background-color: var(--bg-muted);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

.btn-reset:hover {
  background-color: #fee2e2;
  color: var(--danger);
  border-color: #fca5a5;
}

.filter-stats-text {
  font-size: 11px;
  color: var(--text-muted);
  text-align: center;
  font-weight: 500;
}

/* Área Principal de Contenido */
.main-content {
  flex: 1;
  padding: 24px;
  max-width: 1600px;
  margin: 0 auto;
  width: 100%;
  overflow-y: auto;
}

/* Panel de Tab */
.tab-pane {
  display: none;
  animation: fadeIn 0.25s ease-in-out;
}

.tab-pane.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Tarjetas Generales (Cards) */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 20px;
  position: relative;
  transition: box-shadow var(--transition-fast);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

/* Tarjeta de Gráfico con Botón de Exportación SVG */
.chart-card {
  position: relative;
}

.btn-export-svg {
  position: absolute;
  top: 14px;
  right: 14px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 8px;
  background-color: #ffffff;
  color: var(--primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1),
              background-color 0.15s ease,
              border-color 0.15s ease,
              transform 0.15s ease,
              box-shadow 0.15s ease;
  z-index: 15;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.chart-card:hover .btn-export-svg {
  opacity: 1;
  pointer-events: auto;
}

.btn-export-svg:hover {
  background-color: var(--primary-light);
  border-color: var(--border-focus);
  color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.2);
}

.btn-export-svg:active {
  transform: translateY(0);
}

.btn-export-svg svg {
  flex-shrink: 0;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-subtitle {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: normal;
}

/* Fila de KPIs */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-fast);
}

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

.kpi-card.kpi-green::before { background: var(--success); }
.kpi-card.kpi-amber::before { background: var(--warning); }
.kpi-card.kpi-cyan::before { background: var(--info); }

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

.kpi-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.kpi-icon {
  font-size: 18px;
  color: var(--text-light);
}

.kpi-value {
  font-size: 26px;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.1;
}

.kpi-footer {
  font-size: 11px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Gráficos Grid - Tab 1 */
.charts-grid-tab1 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 20px;
}

.col-6 { grid-column: span 6; }
.col-12 { grid-column: span 12; }

.chart-container-md {
  width: 100%;
  height: 340px;
}

.chart-container-lg {
  width: 100%;
  height: 400px;
}

/* TAB 2: Explorador Univariable */
.univariate-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}

.univariate-selector-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  max-width: 600px;
}

.univariate-selector-wrapper label {
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  color: var(--text-secondary);
}

.univariate-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-toggle-view {
  background: var(--bg-muted);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-toggle-view.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

/* Fila de Estadísticas Adaptativas */
.stats-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

.stat-metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-metric-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
}

.stat-metric-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
}

.stat-metric-sub {
  font-size: 11px;
  color: var(--text-muted);
}

/* Columna de 2 Secciones Tab 2 */
.univariate-details-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

/* Tablas HTML Estilizadas */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: #ffffff;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 12px;
}

.data-table thead {
  background-color: var(--bg-muted);
  color: var(--text-secondary);
  font-weight: 600;
  position: sticky;
  top: 0;
}

.data-table th, .data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-color);
}

.data-table th.text-right, .data-table td.text-right {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.data-table tbody tr:hover {
  background-color: #f8fafc;
}

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

.data-table tfoot {
  background-color: #f1f5f9;
  font-weight: 700;
  color: var(--text-main);
  border-top: 2px solid var(--border-color);
}

/* TAB 3: Bivariable */
.bivariate-toolbar {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}

.bivariate-select-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.bivariate-select-group label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}

.bivariate-sections {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Matriz de Contingencia */
.contingency-table-wrapper {
  overflow-x: auto;
  max-width: 100%;
}

.matrix-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}

.matrix-table th, .matrix-table td {
  padding: 9px 12px;
  border: 1px solid var(--border-color);
  text-align: center;
}

.matrix-table thead th {
  background-color: var(--bg-muted);
  font-weight: 600;
  color: var(--text-secondary);
}

.matrix-table th.corner-header {
  background-color: #e2e8f0;
  text-align: left;
  font-weight: 700;
  min-width: 160px;
}

.matrix-table th.row-header {
  text-align: left;
  background-color: #f8fafc;
  font-weight: 600;
  min-width: 160px;
}

.matrix-table .marginal-total {
  background-color: #f1f5f9;
  font-weight: 700;
  color: var(--primary);
}

.matrix-cell-heat {
  position: relative;
  transition: background-color var(--transition-fast);
}

.matrix-cell-heat:hover {
  outline: 2px solid var(--primary);
  z-index: 2;
}

/* Spinner y Loader */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(255, 255, 255, 0.85);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  z-index: 100;
  backdrop-filter: blur(4px);
  transition: opacity 0.3s;
}

.loading-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.spinner {
  width: 44px;
  height: 44px;
  border: 4px solid #e2e8f0;
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Responsive Breakpoints */
@media (max-width: 1100px) {
  .charts-grid-tab1 .col-6 { grid-column: span 12; }
  .univariate-details-grid { grid-template-columns: 1fr; }
  .bivariate-toolbar { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .app-sidebar {
    position: fixed;
    height: calc(100vh - var(--header-height));
    box-shadow: var(--shadow-lg);
  }
  .app-sidebar.collapsed {
    margin-left: calc(-1 * var(--sidebar-width));
  }
  .app-header {
    padding: 0 16px;
  }
  .brand-info p {
    display: none;
  }
  .nav-tabs .tab-text {
    display: none;
  }
}