/**
 * Estilos canónicos del Laboratorio de Econometría y Regresión MCO
 * Fijate Tools • Econometrics Studio
 */

:root {
  --bg-body: #0a0e17;
  --bg-card: #121826;
  --bg-card-subtle: #182234;
  --bg-card-hover: #1f2c42;
  --border-color: #26334d;
  --border-focus: #3b82f6;
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --accent: #ff8507;
  --accent-glow: rgba(255, 133, 7, 0.18);
  --line-color: #38bdf8;
  --band-color: rgba(56, 189, 248, 0.14);
  --point-color: #f97316;
  --res-color: #10b981;
  --green: #10b981;
  --yellow: #f59e0b;
  --red: #f43f5e;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --font-mono: 'JetBrains Mono', monospace;
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

[data-theme="light"] {
  --bg-body: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-subtle: #f1f5f9;
  --bg-card-hover: #e2e8f0;
  --border-color: #cbd5e1;
  --border-focus: #2563eb;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --accent: #ea580c;
  --accent-glow: rgba(234, 88, 12, 0.12);
  --line-color: #0284c7;
  --band-color: rgba(2, 132, 199, 0.12);
  --point-color: #ea580c;
  --res-color: #059669;
  --green: #059669;
  --yellow: #d97706;
  --red: #e11d48;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.5;
  overflow-x: clip;
  width: 100%;
  max-width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.main-wrapper.tool-layout {
  max-width: 1360px;
  margin: 1rem auto 3rem;
  padding: 0 1rem;
  width: 100%;
  flex: 1;
}

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

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

/* Presets Bar */
.card-presets {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  margin-bottom: 1.25rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.presets-header {
  margin-bottom: 0.65rem;
}

.presets-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.presets-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.btn-preset {
  background: var(--bg-card-subtle);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.85rem;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  min-height: 38px;
  display: inline-flex;
  align-items: center;
}

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

.btn-preset.active {
  background: var(--accent-glow);
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}

/* Pestañas */
.econo-nav-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  border-bottom: 2px solid var(--border-color);
  margin-bottom: 1.5rem;
}

.tab-btn {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 9px 9px 0 0;
  padding: 0.65rem 1.15rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 44px;
  transition: all 0.2s ease;
  margin-bottom: -2px;
}

.tab-btn:hover {
  color: var(--text-main);
  background: var(--bg-card-subtle);
}

.tab-btn.active {
  background: var(--bg-card);
  color: var(--accent);
  border-color: var(--border-color) var(--border-color) var(--bg-card);
  border-top: 3px solid var(--accent);
  z-index: 2;
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
  animation: fadeIn 0.25s ease;
}

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

/* Layout Principal Econometría */
.econo-grid {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 1.5rem;
  align-items: start;
}

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

/* Tarjeta Editor de Datos */
.card-data-editor {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
}

.section-desc {
  font-size: 0.84rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

.data-variable-labels {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.field-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.field-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.form-input-sm {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.65rem;
  color: var(--text-main);
  font-size: 0.85rem;
  min-height: 38px;
  outline: none;
}

.form-input-sm:focus {
  border-color: var(--border-focus);
}

.textarea-wrapper {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.data-textarea {
  width: 100%;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.65rem;
  color: var(--text-main);
  font-size: 0.88rem;
  resize: vertical;
  line-height: 1.45;
  outline: none;
}

.data-textarea:focus {
  border-color: var(--border-focus);
}

.data-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.sample-count-badge {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--bg-card-subtle);
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  border: 1px solid var(--border-color);
}

/* Columna Escenario Regresión */
.card-regression-stage {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.scatter-svg-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1rem;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
}

#scatter-svg, #residuals-svg {
  width: 100%;
  height: auto;
  min-height: 340px;
  display: block;
}

/* Tarjeta Salida MCO */
.regression-output-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.output-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.output-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
}

.output-model-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-weight: 700;
}

.table-responsive-wrapper {
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.mco-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  text-align: left;
}

.mco-table th, .mco-table td {
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--border-color);
}

.mco-table th {
  background: var(--bg-card-subtle);
  color: var(--text-muted);
  font-weight: 600;
}

.font-mono {
  font-family: var(--font-mono);
}

.font-bold {
  font-weight: 700;
}

.stats-footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  background: var(--bg-card-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
  border: 1px solid var(--border-color);
}

@media (max-width: 900px) {
  .stats-footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.stat-cell-label {
  font-size: 0.74rem;
  color: var(--text-muted);
}

.stat-cell strong {
  font-size: 0.9rem;
  color: var(--text-main);
}

/* VISTA 2: RESIDUOS */
.residuals-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.residuals-graph-card, .residuals-table-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.max-h-table {
  max-height: 280px;
  overflow-y: auto;
}

/* VISTA 3: AUDITORÍA GAUSS-MARKOV */
.gauss-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.gauss-assumptions-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.gauss-item {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.gauss-badge {
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  white-space: nowrap;
}

.badge-ok {
  background: rgba(16, 185, 129, 0.15);
  color: var(--green);
  border: 1px solid var(--green);
}

.badge-warn {
  background: rgba(245, 158, 11, 0.15);
  color: var(--yellow);
  border: 1px solid var(--yellow);
}

.badge-err {
  background: rgba(244, 63, 94, 0.15);
  color: var(--red);
  border: 1px solid var(--red);
}

.gauss-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.gauss-name {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
}

.gauss-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Modales Canónicos */
.modal-backdrop {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  padding: 1rem;
}

.modal-dialog-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  max-width: 480px;
  width: 100%;
  padding: 1.5rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.modal-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
}

.modal-body {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.6rem 1.25rem;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  min-height: 40px;
}