/**
 * Fijate Tools - Calculadora de Kolmogorov-Smirnov
 * Hoja de estilos canónica: style.css
 */

/* ==========================================================================
   1. Variables de diseño y temas (Oscuro por defecto y Claro)
   ========================================================================== */
:root,
html[data-theme="dark"] {
  --ks-bg-base: #0b0f19;
  --ks-bg-surface: #131b2e;
  --ks-bg-surface-raised: #1c2640;
  --ks-bg-input: #0e1626;
  --ks-border: #23314f;
  --ks-border-hover: #3b82f6;
  --ks-text-primary: #f8fafc;
  --ks-text-secondary: #94a3b8;
  --ks-text-muted: #64748b;

  --ks-accent: #3b82f6;
  --ks-accent-hover: #2563eb;
  --ks-accent-glow: rgba(59, 130, 246, 0.25);

  --ks-success: #10b981;
  --ks-success-bg: rgba(16, 185, 129, 0.12);
  --ks-success-border: rgba(16, 185, 129, 0.35);

  --ks-danger: #f43f5e;
  --ks-danger-bg: rgba(244, 63, 94, 0.12);
  --ks-danger-border: rgba(244, 63, 94, 0.35);

  --ks-warning: #f59e0b;
  --ks-warning-bg: rgba(245, 158, 11, 0.12);
  --ks-warning-border: rgba(245, 158, 11, 0.35);

  --ks-canvas-bg: #090e17;
  --ks-shadow-card: 0 4px 20px rgba(0, 0, 0, 0.35);
}

html[data-theme="light"] {
  --ks-bg-base: #f8fafc;
  --ks-bg-surface: #ffffff;
  --ks-bg-surface-raised: #f1f5f9;
  --ks-bg-input: #ffffff;
  --ks-border: #cbd5e1;
  --ks-border-hover: #0284c7;
  --ks-text-primary: #0f172a;
  --ks-text-secondary: #475569;
  --ks-text-muted: #64748b;

  --ks-accent: #0284c7;
  --ks-accent-hover: #0369a1;
  --ks-accent-glow: rgba(2, 132, 199, 0.2);

  --ks-success: #059669;
  --ks-success-bg: #ecfdf5;
  --ks-success-border: #a7f3d0;

  --ks-danger: #e11d48;
  --ks-danger-bg: #fff1f2;
  --ks-danger-border: #fecdd3;

  --ks-warning: #d97706;
  --ks-warning-bg: #fffbeb;
  --ks-warning-border: #fde68a;

  --ks-canvas-bg: #ffffff;
  --ks-shadow-card: 0 4px 16px rgba(15, 23, 42, 0.08);
}

/* ==========================================================================
   2. Estructura general y contención
   ========================================================================== */
body {
  margin: 0;
  padding: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--ks-bg-base);
  color: var(--ks-text-primary);
  overflow-x: clip;
  width: 100%;
  max-width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.font-mono {
  font-family: 'JetBrains Mono', monospace;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', sans-serif;
  margin-top: 0;
  color: var(--ks-text-primary);
  font-weight: 700;
}

.tool-layout {
  max-width: 1200px;
  margin: 1.5rem auto 3rem;
  padding: 0 1rem;
  box-sizing: border-box;
}

.tool-with-sidebar {
  display: flex;
  gap: 1.75rem;
  align-items: flex-start;
}

.tool-main-content {
  flex: 1 1 0%;
  min-width: 0;
  width: 100%;
}

/* ==========================================================================
   3. Tarjetas principales y secciones
   ========================================================================== */
.card-main {
  background-color: var(--ks-bg-surface);
  border: 1px solid var(--ks-border);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: var(--ks-shadow-card);
  margin-bottom: 1.75rem;
}

@media (max-width: 768px) {
  .card-main {
    padding: 1rem;
    border-radius: 10px;
  }
}

.card-header-clean {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--ks-border);
}

.card-title {
  font-size: 1.25rem;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card-subtitle {
  font-size: 0.875rem;
  color: var(--ks-text-secondary);
  margin: 0.25rem 0 0 0;
}

/* ==========================================================================
   4. Presets rápidos de demostración
   ========================================================================== */
.presets-container {
  margin-bottom: 1.25rem;
}

.presets-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ks-text-secondary);
  margin-bottom: 0.5rem;
  display: block;
}

.presets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 0.5rem;
}

.btn-preset {
  background: var(--ks-bg-surface-raised);
  border: 1px solid var(--ks-border);
  color: var(--ks-text-secondary);
  font-size: 0.8125rem;
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  cursor: pointer;
  text-align: left;
  transition: all 0.2s ease;
  min-height: 40px;
  display: flex;
  align-items: center;
}

.btn-preset:hover {
  background: var(--ks-accent);
  color: #ffffff;
  border-color: var(--ks-accent);
  transform: translateY(-1px);
}

/* ==========================================================================
   5. Formulario de entrada de datos y Dropzone
   ========================================================================== */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--ks-text-primary);
}

.data-counter-badge {
  font-size: 0.75rem;
  font-family: 'JetBrains Mono', monospace;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

.counter-empty {
  background: var(--ks-bg-surface-raised);
  color: var(--ks-text-muted);
}

.counter-warning {
  background: var(--ks-warning-bg);
  color: var(--ks-warning);
  border: 1px solid var(--ks-warning-border);
}

.counter-ready {
  background: var(--ks-success-bg);
  color: var(--ks-success);
  border: 1px solid var(--ks-success-border);
}

.data-textarea {
  width: 100%;
  box-sizing: border-box;
  min-height: 110px;
  background: var(--ks-bg-input);
  border: 1px solid var(--ks-border);
  border-radius: 8px;
  color: var(--ks-text-primary);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  padding: 0.75rem;
  resize: vertical;
  line-height: 1.5;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.data-textarea:focus {
  outline: none;
  border-color: var(--ks-accent);
  box-shadow: 0 0 0 3px var(--ks-accent-glow);
}

/* Dropzone para archivos */
.dropzone-box {
  margin-top: 0.5rem;
  border: 2px dashed var(--ks-border);
  background: var(--ks-bg-surface-raised);
  border-radius: 8px;
  padding: 0.85rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.8125rem;
  color: var(--ks-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.dropzone-box:hover,
.dropzone-box.drag-over {
  border-color: var(--ks-accent);
  background: var(--ks-bg-surface);
  color: var(--ks-accent);
}

/* ==========================================================================
   6. Opciones de contraste y distribución
   ========================================================================== */
.controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.form-select,
.form-input {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  box-sizing: border-box;
  height: 42px;
  min-height: 40px;
  background-color: var(--ks-bg-input);
  border: 1px solid var(--ks-border);
  border-radius: 8px;
  color: var(--ks-text-primary);
  font-size: 0.875rem;
  padding: 0 0.75rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-select {
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}

.form-select option,
.form-select optgroup {
  background-color: var(--ks-bg-surface);
  color: var(--ks-text-primary);
}

.form-select:focus,
.form-input:focus {
  outline: none;
  border-color: var(--ks-accent);
  box-shadow: 0 0 0 3px var(--ks-accent-glow);
}

/* Radio switches tipo pastilla */
.pill-options-group {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.35rem;
  background: var(--ks-bg-surface-raised);
  padding: 0.25rem;
  border-radius: 8px;
  border: 1px solid var(--ks-border);
}

.pill-option {
  position: relative;
  text-align: center;
}

.pill-option input[type="radio"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.pill-label {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 0 0.5rem;
  border-radius: 6px;
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  color: var(--ks-text-secondary);
  transition: all 0.2s ease;
}

.pill-option input[type="radio"]:checked + .pill-label {
  background: var(--ks-accent);
  color: #ffffff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

/* Parámetros manuales dinámicos */
.manual-params-box {
  background: var(--ks-bg-surface-raised);
  border: 1px solid var(--ks-border);
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 1.25rem;
}

.params-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
}

/* Botón principal de calcular */
.btn-primary-action {
  width: 100%;
  min-height: 46px;
  background: var(--ks-accent);
  color: #ffffff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: all 0.2s ease;
  box-shadow: 0 2px 8px var(--ks-accent-glow);
}

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

/* ==========================================================================
   7. Resultados: Veredicto y Tarjetas KPI
   ========================================================================== */
.verdict-card {
  padding: 1.25rem;
  border-radius: 10px;
  margin-bottom: 1.5rem;
  border: 1px solid transparent;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.verdict-pass {
  background: var(--ks-success-bg);
  border-color: var(--ks-success-border);
  color: var(--ks-text-primary);
}

.verdict-pass .verdict-title {
  color: var(--ks-success);
}

.verdict-fail {
  background: var(--ks-danger-bg);
  border-color: var(--ks-danger-border);
  color: var(--ks-text-primary);
}

.verdict-fail .verdict-title {
  color: var(--ks-danger);
}

.verdict-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0;
}

.verdict-desc {
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--ks-text-secondary);
  margin: 0;
}

/* Cuadrícula de KPIs */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.kpi-card {
  background: var(--ks-bg-surface-raised);
  border: 1px solid var(--ks-border);
  border-radius: 10px;
  padding: 1rem;
  text-align: center;
}

.kpi-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ks-text-secondary);
  margin-bottom: 0.35rem;
  display: block;
}

.kpi-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--ks-text-primary);
}

.kpi-sub {
  font-size: 0.75rem;
  color: var(--ks-text-muted);
  margin-top: 0.25rem;
}

/* Aviso de Lilliefors */
.lilliefors-box {
  background: var(--ks-warning-bg);
  border: 1px solid var(--ks-warning-border);
  border-radius: 8px;
  padding: 0.85rem 1rem;
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
}

.lilliefors-box h4 {
  color: var(--ks-warning);
  font-size: 0.9375rem;
  margin: 0 0 0.35rem 0;
}

.lilliefors-meta {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8125rem;
  margin-top: 0.5rem;
}

/* ==========================================================================
   8. Visualizador Canvas y barra de herramientas
   ========================================================================== */
.chart-container-box {
  background: var(--ks-canvas-bg);
  border: 1px solid var(--ks-border);
  border-radius: 10px;
  padding: 1rem;
  margin-bottom: 1.5rem;
}

.chart-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.chart-tabs {
  display: flex;
  gap: 0.35rem;
  background: var(--ks-bg-surface-raised);
  padding: 0.25rem;
  border-radius: 8px;
  border: 1px solid var(--ks-border);
}

.btn-chart-tab {
  background: transparent;
  border: none;
  color: var(--ks-text-secondary);
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  cursor: pointer;
  min-height: 32px;
  transition: all 0.2s ease;
}

.btn-chart-tab.active {
  background: var(--ks-accent);
  color: #ffffff;
}

.btn-chart-action {
  background: var(--ks-bg-surface-raised);
  border: 1px solid var(--ks-border);
  color: var(--ks-text-secondary);
  font-size: 0.8125rem;
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 36px;
  transition: all 0.2s ease;
}

.btn-chart-action:hover {
  background: var(--ks-accent);
  color: #ffffff;
  border-color: var(--ks-accent);
}

.canvas-wrapper {
  position: relative;
  width: 100%;
  height: 420px;
}

@media (max-width: 640px) {
  .canvas-wrapper {
    height: 320px;
  }
}

.ks-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* ==========================================================================
   9. Estadísticos descriptivos muestrales
   ========================================================================== */
.stats-summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.75rem;
  background: var(--ks-bg-surface-raised);
  border: 1px solid var(--ks-border);
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 1.5rem;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.stat-item-label {
  font-size: 0.75rem;
  color: var(--ks-text-secondary);
}

.stat-item-val {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ks-text-primary);
}

/* ==========================================================================
   10. Tabla de cálculo paso a paso
   ========================================================================== */
.table-wrapper {
  width: 100%;
  overflow-x: auto;
  margin-bottom: 1rem;
  border: 1px solid var(--ks-border);
  border-radius: 8px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
  text-align: left;
}

.data-table th {
  background: var(--ks-bg-surface-raised);
  color: var(--ks-text-secondary);
  font-weight: 600;
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--ks-border);
  white-space: nowrap;
}

.data-table td {
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--ks-border);
  color: var(--ks-text-primary);
  white-space: nowrap;
}

.data-table tr:hover {
  background-color: var(--ks-bg-surface-raised);
}

.row-max-d {
  background-color: var(--ks-danger-bg) !important;
  font-weight: 600;
}

.badge-max-d {
  background: var(--ks-danger);
  color: #ffffff;
  font-size: 0.6875rem;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.val-highlight {
  color: var(--ks-danger);
  font-weight: 700;
}

.table-footer-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.8125rem;
  color: var(--ks-text-secondary);
}

.pagination-btn-group {
  display: flex;
  gap: 0.35rem;
}

.btn-page {
  background: var(--ks-bg-surface-raised);
  border: 1px solid var(--ks-border);
  color: var(--ks-text-secondary);
  padding: 0.35rem 0.65rem;
  border-radius: 6px;
  cursor: pointer;
  min-height: 32px;
}

.btn-page:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ==========================================================================
   11. Botones de acción inferior y exportación
   ========================================================================== */
.actions-bottom-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.btn-action-sec {
  background: var(--ks-bg-surface-raised);
  border: 1px solid var(--ks-border);
  color: var(--ks-text-primary);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.55rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 40px;
  transition: all 0.2s ease;
}

.btn-action-sec:hover {
  border-color: var(--ks-accent);
  background: var(--ks-bg-surface);
}

/* ==========================================================================
   12. Historial de contrastes
   ========================================================================== */
.history-section {
  margin-top: 2rem;
}

.history-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0.85rem;
  margin-top: 1rem;
}

.history-item {
  background: var(--ks-bg-surface-raised);
  border: 1px solid var(--ks-border);
  border-radius: 8px;
  padding: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.history-item-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.5rem;
}

.history-dist-title {
  font-weight: 600;
  font-size: 0.875rem;
  display: block;
}

.history-date {
  font-size: 0.75rem;
  color: var(--ks-text-muted);
}

.history-badge {
  font-size: 0.6875rem;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  font-weight: 600;
}

.badge-pass {
  background: var(--ks-success-bg);
  color: var(--ks-success);
  border: 1px solid var(--ks-success-border);
}

.badge-fail {
  background: var(--ks-danger-bg);
  color: var(--ks-danger);
  border: 1px solid var(--ks-danger-border);
}

.history-meta {
  display: flex;
  gap: 0.75rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--ks-text-secondary);
}

.history-item-actions {
  display: flex;
  justify-content: space-between;
  margin-top: 0.25rem;
}

.btn-history-load {
  background: var(--ks-bg-surface);
  border: 1px solid var(--ks-border);
  color: var(--ks-text-primary);
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  min-height: 32px;
}

.btn-history-delete {
  background: transparent;
  border: none;
  color: var(--ks-text-muted);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 4px;
  min-height: 32px;
  min-width: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-history-delete:hover {
  color: var(--ks-danger);
}

.history-empty {
  font-size: 0.875rem;
  color: var(--ks-text-muted);
  padding: 1rem 0;
  text-align: center;
}

/* ==========================================================================
   13. Modales accesibles (Reemplazo estricto de window.alert / confirm)
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  box-sizing: border-box;
}

.modal-overlay.active {
  display: flex;
  animation: modalFadeIn 0.2s ease-out;
}

@keyframes modalFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-box {
  background: var(--ks-bg-surface);
  border: 1px solid var(--ks-border);
  border-radius: 12px;
  width: 100%;
  max-width: 480px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  overflow: hidden;
  animation: modalPopIn 0.2s ease-out;
}

@keyframes modalPopIn {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

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

.modal-title {
  font-size: 1.125rem;
  margin: 0;
}

.btn-modal-close {
  background: transparent;
  border: none;
  color: var(--ks-text-secondary);
  cursor: pointer;
  padding: 0.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
}

.modal-body {
  padding: 1.25rem;
  font-size: 0.9375rem;
  color: var(--ks-text-secondary);
  line-height: 1.5;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  background: var(--ks-bg-surface-raised);
  border-top: 1px solid var(--ks-border);
}

.btn-modal {
  min-height: 40px;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
}

.btn-modal-primary {
  background: var(--ks-accent);
  color: #ffffff;
}

.btn-modal-danger {
  background: var(--ks-danger);
  color: #ffffff;
}

.btn-modal-secondary {
  background: transparent;
  color: var(--ks-text-secondary);
  border: 1px solid var(--ks-border);
}

/* Toast feedback flotante */
.toast-feedback {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--ks-bg-surface-raised);
  color: var(--ks-text-primary);
  border: 1px solid var(--ks-border);
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  font-size: 0.875rem;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
  z-index: 10000;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s ease;
  pointer-events: none;
}

.toast-feedback.show {
  transform: translateY(0);
  opacity: 1;
}

/* ==========================================================================
   14. Guía didáctica y documentación SEO
   ========================================================================== */
.guide-section {
  margin-top: 2.5rem;
  line-height: 1.6;
}

.guide-section h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  border-bottom: 2px solid var(--ks-border);
  padding-bottom: 0.5rem;
}

.guide-section h3 {
  font-size: 1.2rem;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

.guide-section p,
.guide-section li {
  color: var(--ks-text-secondary);
  font-size: 0.9375rem;
}

.math-formula-box {
  background: var(--ks-bg-surface-raised);
  border-left: 4px solid var(--ks-accent);
  padding: 0.85rem 1.25rem;
  border-radius: 0 8px 8px 0;
  margin: 1rem 0;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  overflow-x: auto;
}

.faq-item {
  border-bottom: 1px solid var(--ks-border);
  padding: 1rem 0;
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--ks-text-primary);
  margin-bottom: 0.5rem;
}

/* ==========================================================================
   15. Reglas de Impresión (@media print)
   ========================================================================== */
@media print {
  body {
    background: #ffffff !important;
    color: #000000 !important;
  }

  .app-header,
  .fijate-footer,
  .tool-ad-sidebar,
  .tools-ad-banner-section,
  .presets-container,
  .dropzone-box,
  .chart-toolbar,
  .actions-bottom-row,
  .history-section,
  .modal-overlay,
  .toast-feedback,
  .btn-primary-action,
  .btn-chart-action,
  .pagination-btn-group,
  #file-input {
    display: none !important;
  }

  .tool-layout {
    max-width: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
  }

  .card-main {
    box-shadow: none !important;
    border: 1px solid #cccccc !important;
    break-inside: avoid;
  }

  .kpi-card,
  .stats-summary-grid {
    border: 1px solid #dddddd !important;
    background: #fafafa !important;
  }

  .canvas-wrapper {
    height: 300px !important;
  }
}