/* ==========================================================================
   DATAHACKS WIREFRAME SYSTEM - CSS DE BAJA/MEDIA FIDELIDAD
   Cumplimiento de Especificaciones de Interacción y Rúbrica Académica
   ========================================================================== */

:root {
  /* Paleta Funcional Wireframe (Escala de Grises Monocromática) */
  --wf-canvas: #F3F4F6;         /* Gris muy claro de fondo del lienzo */
  --wf-surface: #FFFFFF;        /* Superficie blanca para tarjetas y paneles */
  --wf-border: #D1D5DB;         /* Borde delimitador estructural neutro */
  --wf-border-strong: #9CA3AF;  /* Borde más marcado para separadores */
  --wf-placeholder-bg: #E5E7EB; /* Gris medio para cajas de imagen/gráfico */
  
  /* Jerarquía Tipográfica Monocromática */
  --wf-text-title: #111827;     /* Negro carbón para encabezados H1-H3 */
  --wf-text-body: #4B5563;      /* Gris medio para párrafos y metadatos */
  --wf-text-muted: #6B7280;     /* Gris tenue para badges y captions */

  /* Color Único de Acento Interactivo (Affordance de Bajo Nivel) */
  --wf-accent: #2563EB;         /* Azul técnico institucional para elementos clicables */
  --wf-accent-hover: #1D4ED8;   /* Azul oscuro para estado activo/hover */
  --wf-accent-light: #EFF6FF;   /* Azul muy pálido para badges interactivos */

  /* Tipografía Estándar */
  --wf-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --wf-font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;

  /* Espaciados y Retícula */
  --wf-container-max: 1200px;
  --wf-radius: 6px;
  --wf-gap: 24px;
}

/* Reseteo y Base */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--wf-canvas);
  color: var(--wf-text-body);
  font-family: var(--wf-font-sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Contenedor Principal Centrado (1200px máx.) */
.wf-container {
  width: 100%;
  max-width: var(--wf-container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* Barra de Navegación Superior Persistente (Wireframe Header) */
.wf-navbar {
  background-color: var(--wf-surface);
  border-bottom: 2px solid var(--wf-border);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 12px 0;
}

.wf-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.wf-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--wf-text-title);
  font-weight: 800;
  font-size: 18px;
}

.wf-brand-badge {
  background-color: var(--wf-placeholder-bg);
  border: 1px dashed var(--wf-border-strong);
  padding: 6px 10px;
  font-size: 12px;
  font-family: var(--wf-font-mono);
  font-weight: 700;
  color: var(--wf-text-title);
  border-radius: var(--wf-radius);
}

.wf-nav-links {
  display: flex;
  list-style: none;
  gap: 20px;
  align-items: center;
}

.wf-nav-link {
  text-decoration: none;
  color: var(--wf-text-title);
  font-size: 14px;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: var(--wf-radius);
  transition: all 0.15s ease;
  border-bottom: 2px solid transparent;
}

.wf-nav-link:hover {
  color: var(--wf-accent);
}

.wf-nav-link.active {
  color: var(--wf-accent);
  background-color: var(--wf-accent-light);
  border-bottom: 2px solid var(--wf-accent);
}

/* Botones CTA (Ley de Fitts: min-height 40px, affordance azul) */
.wf-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  min-height: 40px;
  font-family: var(--wf-font-sans);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--wf-radius);
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s;
  border: 1px solid transparent;
}

.wf-btn-primary {
  background-color: var(--wf-accent);
  color: #FFFFFF;
}

.wf-btn-primary:hover {
  background-color: var(--wf-accent-hover);
}

.wf-btn-secondary {
  background-color: var(--wf-surface);
  color: var(--wf-accent);
  border: 1px solid var(--wf-accent);
}

.wf-btn-secondary:hover {
  background-color: var(--wf-accent-light);
}

.wf-btn-neutral {
  background-color: var(--wf-placeholder-bg);
  color: var(--wf-text-title);
  border: 1px solid var(--wf-border-strong);
}

.wf-btn-neutral:hover {
  background-color: #D1D5DB;
}

/* Tarjetas y Contenedores */
.wf-card {
  background-color: var(--wf-surface);
  border: 1px solid var(--wf-border);
  border-radius: var(--wf-radius);
  padding: 24px;
}

/* Tipografía */
h1.wf-h1 {
  font-size: 32px;
  font-weight: 800;
  color: var(--wf-text-title);
  line-height: 1.2;
  margin-bottom: 12px;
}

h2.wf-h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--wf-text-title);
  line-height: 1.3;
  margin-bottom: 16px;
}

h3.wf-h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--wf-text-title);
  line-height: 1.4;
  margin-bottom: 8px;
}

p.wf-lead {
  font-size: 16px;
  color: var(--wf-text-body);
  line-height: 1.6;
  margin-bottom: 24px;
}

p.wf-body {
  font-size: 14px;
  color: var(--wf-text-body);
  line-height: 1.5;
  margin-bottom: 16px;
}

/* Placeholders para Gráficos, Mapas y Visualizaciones */
.wf-placeholder {
  background-color: var(--wf-placeholder-bg);
  border: 1px dashed var(--wf-border-strong);
  border-radius: var(--wf-radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
  min-height: 200px;
  color: var(--wf-text-muted);
}

.wf-placeholder-icon {
  width: 48px;
  height: 48px;
  border: 2px dashed var(--wf-border-strong);
  border-radius: 4px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  color: var(--wf-text-muted);
}

.wf-placeholder-label {
  font-weight: 600;
  font-size: 13px;
  color: var(--wf-text-title);
  margin-bottom: 4px;
}

.wf-placeholder-dim {
  font-family: var(--wf-font-mono);
  font-size: 11px;
  color: var(--wf-text-muted);
}

/* Badges y Metadatos */
.wf-badge {
  display: inline-block;
  padding: 4px 8px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background-color: var(--wf-placeholder-bg);
  color: var(--wf-text-title);
  border-radius: 4px;
  border: 1px solid var(--wf-border);
}

.wf-badge-interactive {
  background-color: var(--wf-accent-light);
  color: var(--wf-accent);
  border-color: #BFDBFE;
}

/* Sistema de Rejilla (Grid de 12 Columnas y Helpers) */
.wf-grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--wf-gap);
}

.wf-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--wf-gap);
}

.wf-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--wf-gap);
}

.wf-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--wf-gap);
}

@media (max-width: 900px) {
  .wf-grid-3, .wf-grid-4, .wf-grid-2 {
    grid-template-columns: 1fr;
  }
}

/* Breadcrumbs (Navegación de Retorno) */
.wf-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--wf-text-muted);
  margin-bottom: 16px;
}

.wf-breadcrumbs a {
  color: var(--wf-accent);
  text-decoration: none;
}

.wf-breadcrumbs a:hover {
  text-decoration: underline;
}

/* Footer del Wireframe */
.wf-footer {
  background-color: var(--wf-surface);
  border-top: 1px solid var(--wf-border);
  padding: 40px 0 24px;
  margin-top: 60px;
}

.wf-footer-cols {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

.wf-footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--wf-text-title);
  margin-bottom: 12px;
}

.wf-footer-col ul {
  list-style: none;
}

.wf-footer-col ul li {
  margin-bottom: 8px;
}

.wf-footer-col ul li a {
  color: var(--wf-text-body);
  text-decoration: none;
  font-size: 13px;
}

.wf-footer-col ul li a:hover {
  color: var(--wf-accent);
}

.wf-footer-bottom {
  border-top: 1px solid var(--wf-border);
  padding-top: 16px;
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--wf-text-muted);
}

/* Marcador flotante de modo Wireframe */
.wf-indicator-bar {
  background-color: #111827;
  color: #FFFFFF;
  padding: 6px 16px;
  font-size: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--wf-font-mono);
}

.wf-indicator-bar a {
  color: #93C5FD;
  text-decoration: none;
  margin-left: 8px;
}