/* ==========================================================================
   SOFÍA - Layout Architecture
   Arquitectura de Rejilla y Contenedores (3 Columnas Reactivas)
   ========================================================================== */

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

html, body {
  height: 100%;
  width: 100%;
  background-color: var(--color-bg);
  color: var(--color-text-main);
  font-family: var(--font-family-body);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* --- Estructura Principal del App Shell --- */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  height: 100vh;
  overflow: hidden;
}

/* --- Header Superior --- */
.app-header {
  height: var(--header-height);
  min-height: var(--header-height);
  flex-shrink: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: grid;
  /* La navegación de módulos recibe el espacio flexible; las acciones
     mantienen una columna compacta para no cortar el sexto módulo. */
  grid-template-columns: 270px minmax(0, 1fr) max-content;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  gap: var(--space-3);
  z-index: 50;
  box-shadow: var(--shadow-sm);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex: 0 0 270px;
  min-width: 270px;
}

.brand-logo-img {
  width: 40px;
  height: 40px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1.5px solid rgba(56, 189, 248, 0.35);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
  background: #0F172A;
  flex-shrink: 0;
}

.brand-logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-inverse);
  font-family: var(--font-family-display);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-md);
  box-shadow: var(--shadow-sm);
}

.brand-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand-title {
  font-family: var(--font-family-display);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-main);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.brand-badge {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  background: var(--color-primary-subtle);
  color: var(--color-primary);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(37, 99, 235, 0.2);
  white-space: nowrap;
  flex-shrink: 0;
}

.brand-subtitle {
  /* La descripción completa permanece disponible en el documento e informes;
     en la cabecera compacta competiría con la navegación. */
  display: none;
}

/* --- Selector de Módulos (Nav Central) --- */
.header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-surface-subtle);
  padding: 4px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  min-width: 0;
  /* La navegación no se centra si excede su columna: así nunca se corta
     el inicio de un módulo. Se conserva desplazamiento horizontal explícito. */
  justify-content: flex-start;
  gap: 2px;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
}

.header-nav::-webkit-scrollbar { display: none; }

.nav-module-btn {
  padding: 6px 8px;
  font-size: 0.7rem;
  flex: 0 0 auto;
  font-weight: var(--font-weight-medium);
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-module-btn:hover {
  color: var(--color-text-main);
  background: rgba(255, 255, 255, 0.6);
}

.nav-module-btn.active {
  background: var(--color-surface);
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
  box-shadow: var(--shadow-sm);
}

.nav-module-btn.disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.nav-module-btn.disabled:hover {
  background: transparent;
  color: var(--color-text-muted);
}

.nav-future-modules {
  border-left: 1px solid var(--color-border) !important;
  border-radius: 0 var(--radius-md) var(--radius-md) 0 !important;
  padding-left: var(--space-3);
}

/* --- Controles del Header (Dual-Lens & Estado) --- */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex: 0 0 auto;
}

/* El selector dual ocupa una columna estrecha en lugar de competir
   horizontalmente con los seis módulos. */
.header-actions .dual-lens-toggle {
  flex-direction: column;
  align-items: stretch;
  border-radius: var(--radius-lg);
  min-width: 168px;
}

.header-actions .dual-lens-btn {
  justify-content: flex-start;
  min-height: 25px;
  padding: 3px 10px;
  white-space: nowrap;
}

@media (max-width: 1400px) {
  .app-header { grid-template-columns: 230px minmax(0, 1fr) max-content; padding: 0 var(--space-4); }
  .header-brand { min-width: 230px; flex-basis: 230px; }
  .brand-subtitle { display: none; }
  .brand-badge { font-size: 0.65rem; padding: 2px 5px; }
  .nav-module-btn { padding: 6px 7px; }
  .header-actions .btn { padding: var(--space-2) var(--space-3); }
}

@media (max-width: 1120px) {
  .app-header { grid-template-columns: 205px minmax(0, 1fr) max-content; gap: var(--space-2); }
  .header-brand { min-width: 205px; flex-basis: 205px; gap: var(--space-2); }
  .header-actions .btn { padding: var(--space-2); font-size: var(--font-size-xs); }
  .header-actions .dual-lens-toggle { min-width: 148px; }
  .nav-module-btn { padding-inline: 6px; }
}

@media (max-width: 992px) {
  /* La cabecera se redistribuye junto con los paneles del contenido. */
  .app-header {
    height: auto;
    min-height: var(--header-height);
    grid-template-columns: minmax(190px, 0.6fr) minmax(0, 1.4fr);
    grid-template-areas:
      "brand actions"
      "nav nav";
    padding-block: var(--space-2);
  }
  .header-brand { grid-area: brand; min-width: 0; flex-basis: auto; }
  .header-nav { grid-area: nav; width: 100%; }
  .header-actions { grid-area: actions; justify-content: flex-end; }
  .header-actions kbd { display: none; }
}

@media (max-width: 760px) {
  /* En vertical cada zona tiene su propia fila: ninguna invade la marca. */
  .app-header {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas: "brand" "nav" "actions";
    padding: 12px;
    gap: 10px;
  }
  .brand-title { flex-wrap: wrap; }
  .header-nav {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    overflow: visible;
  }
  .nav-module-btn {
    min-width: 0;
    min-height: 44px;
    padding: 6px;
    font-size: 0.75rem;
    line-height: 1.25;
    white-space: normal;
    overflow-wrap: anywhere;
  }
  .header-actions {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    min-width: 0;
    gap: 6px;
  }
  .header-actions .btn {
    min-width: 0;
    min-height: 44px;
    padding: 6px;
    white-space: normal;
  }
  .header-actions .dual-lens-toggle {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    min-width: 0;
  }
  .header-actions .dual-lens-btn {
    min-width: 0;
    min-height: 44px;
    padding: 6px;
    justify-content: center;
    white-space: normal;
    line-height: 1.25;
  }
}

/* --- Área de Trabajo Principal (3 Columnas) --- */
.workspace-grid {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr var(--tutor-width);
  height: calc(100vh - var(--header-height));
  overflow: hidden;
  background: var(--color-bg);
}

.module-view-container {
  display: none;
}

.module-view-container.active {
  display: grid;
}

/* Columna Izquierda: Panel de Parámetros */
.panel-controls {
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  padding: var(--space-5);
}

/* Columna Central: Lienzo Gráfico Interactivo */
.panel-viewport {
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  overflow-y: auto;
  padding: var(--space-5);
  gap: var(--space-4);
}

.viewport-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  flex: 1;
  position: relative;
  min-height: 480px;
}

.viewport-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.viewport-title {
  font-family: var(--font-family-display);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-main);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.svg-canvas-wrapper {
  flex: 1;
  width: 100%;
  min-height: 380px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

#ppf-svg-canvas,
#market-svg-canvas,
#elasticity-svg-canvas,
#consumer-svg-canvas,
#cost-svg-canvas,
#monopoly-svg-canvas {
  width: 100%;
  height: 100%;
  max-height: 480px;
  overflow: hidden;
  user-select: none;
}

/* M3 reserva una altura proporcional para el SVG y deja visibles sus métricas. */
#view-module-3 .svg-canvas-wrapper {
  flex: 0 0 clamp(250px, 38vh, 340px);
  min-height: 250px;
}

#view-module-4 .svg-canvas-wrapper {
  flex: 0 0 clamp(250px, 38vh, 340px);
  min-height: 250px;
}

/* En M5 las métricas se anclan al borde inferior. El área libre pertenece
   al gráfico, que conserva una altura mínima legible sin tapar tarjetas. */
#view-module-5 .svg-canvas-wrapper {
  flex: 1 1 auto;
  min-height: 250px;
}

#view-module-5 .metrics-grid {
  margin-top: auto;
  flex-shrink: 0;
}

/* Columna Derecha: Tutor Socrático "Sofía" */
.panel-tutor {
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  padding: var(--space-5);
  gap: var(--space-4);
}

/* --- Responsive Breakpoints --- */
@media (max-width: 1200px) {
  .workspace-grid {
    grid-template-columns: 280px 1fr 320px;
  }
  :root {
    --sidebar-width: 280px;
    --tutor-width: 320px;
  }
}

@media (max-width: 992px) {
  .workspace-grid {
    grid-template-columns: minmax(0, 1fr);
    height: auto;
    overflow-y: auto;
  }
  .app-container {
    height: auto;
    overflow: auto;
  }
  .panel-controls, .panel-tutor {
    border: none;
    border-top: 1px solid var(--color-border);
  }
  .panel-controls, .panel-viewport, .panel-tutor { min-width: 0; }
}