/* ==========================================================================
   COTEL EC S.A.S. · Modelo 4 (Simple e Informativo)
   Concepto: «Del código a la arquitectura» (Nivel Stripe)
   Paleta: Tinta (#0E1A2B), Papel (#F5F3EE), Azul Petróleo (#1F6F8B)
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Fuentes tipográficas locales WOFF2
   -------------------------------------------------------------------------- */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/inter-400-normal.woff2') format('woff2');
}

@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('fonts/inter-500-normal.woff2') format('woff2');
}

@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('fonts/inter-600-normal.woff2') format('woff2');
}

@font-face {
  font-family: 'Inter Tight';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('fonts/inter-tight-700-normal.woff2') format('woff2');
}

@font-face {
  font-family: 'Inter Tight';
  font-style: normal;
  font-weight: 800;
  font-display: swap;
  src: url('fonts/inter-tight-800-normal.woff2') format('woff2');
}

@font-face {
  font-family: 'Instrument Serif';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/instrument-serif-400-italic.woff2') format('woff2');
}

/* --------------------------------------------------------------------------
   2. Variables globales y sistema de diseño
   -------------------------------------------------------------------------- */
:root {
  --color-tinta: #0E1A2B;
  --color-tinta-suave: #1E2D42;
  --color-tinta-muted: #4A5B70;
  --color-petroleo: #1F6F8B;
  --color-petroleo-oscuro: #144A5D;
  --color-petroleo-claro: #2A93B8;
  --color-petroleo-luz: #E8F4F8;
  --color-petroleo-tenue: rgba(31, 111, 139, 0.08);
  --color-petroleo-borde: rgba(31, 111, 139, 0.22);
  --color-papel: #F5F3EE;
  --color-papel-puro: #FFFFFF;
  --color-papel-alt: #EDF1F5;
  --color-borde: rgba(14, 26, 43, 0.10);
  --color-borde-fuerte: rgba(14, 26, 43, 0.20);
  --color-codigo-bg: #09121D;
  --color-codigo-borde: #1C2D42;
  --color-codigo-linea: #556B82;
  --color-codigo-verde: #4ECDC4;
  --color-codigo-azul: #64B5F6;
  --color-codigo-amarillo: #F6C85F;
  --color-codigo-purpura: #C084FC;

  --fuente-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --fuente-titulos: 'Inter Tight', 'Inter', sans-serif;
  --fuente-serif: 'Instrument Serif', Georgia, serif;
  --fuente-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --sombra-sm: 0 2px 8px rgba(14, 26, 43, 0.04);
  --sombra-md: 0 8px 24px -4px rgba(14, 26, 43, 0.07);
  --sombra-lg: 0 16px 40px -8px rgba(14, 26, 43, 0.10);
  --sombra-xl: 0 24px 56px -12px rgba(14, 26, 43, 0.16);

  --radio-sm: 6px;
  --radio-md: 10px;
  --radio-lg: 16px;
  --radio-xl: 24px;
}

/* --------------------------------------------------------------------------
   3. Reseteo y bases
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--color-papel);
  color: var(--color-tinta);
  font-family: var(--fuente-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

img, svg {
  display: block;
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Skip link de accesibilidad */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--color-tinta);
  color: var(--color-papel);
  padding: 0.75rem 1.25rem;
  z-index: 9999;
  border-radius: var(--radio-sm);
  font-weight: 500;
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 1rem;
}

/* --------------------------------------------------------------------------
   4. Cortina de transición entre páginas («Cursor de texto que barre»)
   -------------------------------------------------------------------------- */
.cortina-cursor {
  position: fixed;
  inset: 0;
  z-index: 10000;
  pointer-events: none;
  display: flex;
  transform: translateX(-100%);
  transition: transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
}

.cortina-cursor__plano {
  width: 100%;
  height: 100%;
  background: var(--color-tinta);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  box-shadow: 20px 0 50px rgba(14, 26, 43, 0.4);
}

.cortina-cursor__borde {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 4px;
  background: var(--color-petroleo-claro);
  box-shadow: 0 0 16px var(--color-petroleo-claro), 0 0 32px var(--color-petroleo);
}

.cortina-cursor__etiqueta {
  color: #FFFFFF;
  font-family: var(--fuente-mono);
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  opacity: 0.9;
}

.cortina-cursor__caret {
  display: inline-block;
  width: 8px;
  height: 18px;
  background: var(--color-petroleo-claro);
  animation: parpadeo 0.8s infinite;
}

@keyframes parpadeo {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* Estados de transición */
.cortina-cursor.entrando {
  transform: translateX(0);
}

.cortina-cursor.saliendo {
  transform: translateX(100%);
  transition: transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --------------------------------------------------------------------------
   5. Barra superior de aviso de demostración y selector de modelos
   -------------------------------------------------------------------------- */
.demo-bar {
  background: #09121D;
  color: #94A3B8;
  font-size: 0.78rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  position: relative;
  z-index: 100;
}

.demo-bar__in {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0.45rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.demo-bar__aviso {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.demo-bar__aviso strong {
  color: #F1F5F9;
  font-weight: 600;
}

.demo-bar__modelos {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  white-space: nowrap;
}

.demo-bar__modelos-label {
  color: #64748B;
  margin-right: 0.25rem;
  font-size: 0.75rem;
}

.demo-bar__link {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  color: #94A3B8;
  transition: all 0.2s ease;
  font-weight: 500;
}

.demo-bar__link:hover {
  color: #FFFFFF;
  background: rgba(255, 255, 255, 0.08);
}

.demo-bar__link[aria-current="page"] {
  background: var(--color-petroleo);
  color: #FFFFFF;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   6. Encabezado principal (Header)
   -------------------------------------------------------------------------- */
.header-principal {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(245, 243, 238, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-borde);
  transition: border-color 0.2s ease;
}

.header-in {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0.9rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.logo-cotel {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-tinta);
  font-family: var(--fuente-titulos);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.logo-cotel svg {
  color: var(--color-petroleo);
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.logo-cotel:hover svg {
  transform: rotate(90deg);
}

.logo-cotel small {
  font-size: 0.7rem;
  font-weight: 700;
  background: var(--color-petroleo-luz);
  color: var(--color-petroleo-oscuro);
  border: 1px solid var(--color-petroleo-borde);
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  margin-left: 0.25rem;
  letter-spacing: 0.04em;
  vertical-align: middle;
}

.nav-principal {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-principal a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-tinta-muted);
  transition: color 0.2s ease;
  position: relative;
  padding: 0.25rem 0;
}

.nav-principal a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--color-petroleo);
  transition: width 0.25s ease;
}

.nav-principal a:hover {
  color: var(--color-tinta);
}

.nav-principal a:hover::after,
.nav-principal a[aria-current="page"]::after {
  width: 100%;
}

.nav-principal a[aria-current="page"] {
  color: var(--color-tinta);
  font-weight: 600;
}

.header-cta-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radio-sm);
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-tinta);
  color: var(--color-papel);
  box-shadow: 0 4px 14px rgba(14, 26, 43, 0.15);
}

.btn-primary:hover {
  background: var(--color-petroleo);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(31, 111, 139, 0.25);
}

.btn-outline {
  background: transparent;
  color: var(--color-tinta);
  border: 1px solid var(--color-borde-fuerte);
}

.btn-outline:hover {
  background: rgba(14, 26, 43, 0.04);
  border-color: var(--color-tinta);
}

.btn-petroleo {
  background: var(--color-petroleo);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(31, 111, 139, 0.2);
}

.btn-petroleo:hover {
  background: var(--color-petroleo-oscuro);
  transform: translateY(-1px);
}

/* Botón menú móvil */
.btn-hamb {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radio-sm);
  border: 1px solid var(--color-borde);
  color: var(--color-tinta);
}

.nav-movil {
  display: none;
  background: var(--color-papel-puro);
  border-bottom: 1px solid var(--color-borde);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--sombra-lg);
}

.nav-movil.abierto {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.nav-movil a {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-tinta);
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-borde-fino);
}

/* --------------------------------------------------------------------------
   7. Malla de fondo animada en Canvas (Mesh)
   -------------------------------------------------------------------------- */
.mesh-contenedor {
  position: relative;
  overflow: hidden;
}

.mesh-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  opacity: 0.85;
}

.mesh-contenido {
  position: relative;
  z-index: 2;
}

/* --------------------------------------------------------------------------
   8. Contenedor general y utilidades tipográficas
   -------------------------------------------------------------------------- */
.wrap {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.seccion {
  padding: 5.5rem 0;
  position: relative;
}

.seccion-sm {
  padding: 3.5rem 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-petroleo);
  background: var(--color-petroleo-luz);
  border: 1px solid var(--color-petroleo-borde);
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
}

.titulo-xl {
  font-family: var(--fuente-titulos);
  font-size: clamp(2.2rem, 4.5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--color-tinta);
  margin-bottom: 1.25rem;
}

.titulo-xl em {
  font-family: var(--fuente-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--color-petroleo);
  padding: 0 0.15em;
}

.titulo-lg {
  font-family: var(--fuente-titulos);
  font-size: clamp(1.8rem, 3.2vw, 2.6rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-tinta);
  margin-bottom: 1rem;
}

.titulo-lg em {
  font-family: var(--fuente-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--color-petroleo);
}

.subtitulo-lead {
  font-size: 1.15rem;
  color: var(--color-tinta-muted);
  max-width: 680px;
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   9. Hero «Del código a la arquitectura» (Nivel Stripe)
   -------------------------------------------------------------------------- */
.hero {
  padding: 2.5rem 0 3.5rem;
  background: linear-gradient(180deg, rgba(245, 243, 238, 0.4) 0%, rgba(237, 241, 245, 0.8) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(360px, 470px) minmax(480px, 1fr);
  gap: 2.5rem;
  align-items: center;
}

.hero-header {
  max-width: 500px;
}

.hero-acciones {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.75rem;
}

/* Ventana de la Consola Técnica */
.consola-arquitectura {
  background: var(--color-codigo-bg);
  border: 1px solid var(--color-codigo-borde);
  border-radius: var(--radio-lg);
  box-shadow: var(--sombra-xl), 0 0 60px rgba(31, 111, 139, 0.12);
  overflow: hidden;
  color: #E2E8F0;
  display: flex;
  flex-direction: column;
}

/* Barra superior de la consola */
.consola-barra {
  background: #0D1927;
  padding: 0.65rem 1.15rem;
  border-bottom: 1px solid var(--color-codigo-borde);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.consola-puntos {
  display: flex;
  align-items: center;
  gap: 6px;
}

.consola-punto {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #2D3D52;
}

.consola-punto:nth-child(1) { background: #FF5F56; }
.consola-punto:nth-child(2) { background: #FFBD2E; }
.consola-punto:nth-child(3) { background: #27C93F; }

.consola-archivo {
  font-family: var(--fuente-mono);
  font-size: 0.8rem;
  color: #94A3B8;
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.consola-archivo svg {
  color: var(--color-petroleo-claro);
}

.consola-badge {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--fuente-mono);
  font-size: 0.72rem;
  color: #94A3B8;
  background: rgba(255, 255, 255, 0.05);
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.consola-led {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-petroleo-claro);
  box-shadow: 0 0 8px var(--color-petroleo-claro);
  animation: pulso-led 1.8s infinite;
}

@keyframes pulso-led {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

/* Cuerpo dividido: Editor de Código + Diagrama de Arquitectura */
.consola-cuerpo {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  height: 410px;
}

/* Panel Izquierdo: Editor de Código */
.consola-codigo {
  background: #09121D;
  border-right: 1px solid var(--color-codigo-borde);
  padding: 1.15rem 1rem;
  font-family: var(--fuente-mono);
  font-size: 0.78rem;
  line-height: 1.6;
  overflow-y: auto;
  overflow-x: hidden;
  position: relative;
}

/* Scrollbar estilizada y discreta */
.consola-codigo::-webkit-scrollbar {
  width: 5px;
}
.consola-codigo::-webkit-scrollbar-track {
  background: transparent;
}
.consola-codigo::-webkit-scrollbar-thumb {
  background: #1E2D42;
  border-radius: 4px;
}

/* Panel Izquierdo: Editor de Código */
.consola-codigo {
  background: #09121D;
  border-right: 1px solid var(--color-codigo-borde);
  padding: 1.5rem 1.25rem;
  font-family: var(--fuente-mono);
  font-size: 0.84rem;
  line-height: 1.7;
  overflow-x: auto;
  position: relative;
}

.codigo-lineas {
  list-style: none;
}

.codigo-linea {
  display: flex;
  gap: 1.25rem;
  white-space: pre;
  transition: background-color 0.2s ease;
  border-radius: 3px;
  padding: 0 4px;
}

.codigo-linea.activa {
  background: rgba(31, 111, 139, 0.18);
  border-left: 2px solid var(--color-petroleo-claro);
}

.linea-num {
  color: #475569;
  user-select: none;
  width: 24px;
  text-align: right;
  flex-shrink: 0;
}

.token-comentario { color: #64748B; font-style: italic; }
.token-keyword { color: var(--color-codigo-purpura); font-weight: 600; }
.token-func { color: var(--color-codigo-azul); }
.token-string { color: var(--color-codigo-verde); }
.token-prop { color: var(--color-codigo-amarillo); }
.token-cursor {
  display: inline-block;
  width: 6px;
  height: 1.1em;
  background: var(--color-petroleo-claro);
  vertical-align: text-bottom;
  animation: parpadeo 0.9s infinite;
}

/* Panel Derecho: Diagrama Interactivo de Arquitectura SVG */
.consola-diagrama {
  background: #0C1726;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  position: relative;
}

.diagrama-controles {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.btn-nodo-ctrl {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #94A3B8;
  font-family: var(--fuente-mono);
  font-size: 0.75rem;
  padding: 0.35rem 0.75rem;
  border-radius: 4px;
  transition: all 0.2s ease;
}

.btn-nodo-ctrl:hover {
  background: rgba(31, 111, 139, 0.2);
  color: #FFFFFF;
}

.btn-nodo-ctrl.activo {
  background: var(--color-petroleo);
  color: #FFFFFF;
  border-color: var(--color-petroleo-claro);
  box-shadow: 0 0 12px rgba(31, 111, 139, 0.4);
}

.diagrama-svg-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
}

.diagrama-svg {
  width: 100%;
  height: auto;
  max-height: 350px;
}

/* Elementos SVG del diagrama */
.svg-cable {
  stroke: #1E334D;
  stroke-width: 2;
  fill: none;
}

.svg-cable-pulso {
  stroke: var(--color-petroleo-claro);
  stroke-width: 2.5;
  fill: none;
  stroke-dasharray: 8 24;
  animation: flujo-datos 2.4s linear infinite;
}

@keyframes flujo-datos {
  from { stroke-dashoffset: 64; }
  to { stroke-dashoffset: 0; }
}

.svg-nodo-caja {
  fill: #112033;
  stroke: #22374E;
  stroke-width: 1.5;
  rx: 8;
  transition: all 0.3s ease;
  cursor: pointer;
}

.svg-nodo.activo .svg-nodo-caja {
  fill: #16324D;
  stroke: var(--color-petroleo-claro);
  filter: drop-shadow(0 0 10px rgba(42, 147, 184, 0.4));
}

.svg-nodo-titulo {
  font-family: var(--fuente-sans);
  font-size: 11px;
  font-weight: 600;
  fill: #F1F5F9;
}

.svg-nodo-sub {
  font-family: var(--fuente-mono);
  font-size: 8.5px;
  fill: #94A3B8;
}

.svg-nodo-badge {
  font-family: var(--fuente-mono);
  font-size: 7.5px;
  fill: var(--color-petroleo-claro);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   10. Línea de tiempo interactiva: Los 4 pasos del Modelo 1
   -------------------------------------------------------------------------- */
.seccion-timeline {
  background: var(--color-papel-puro);
  border-top: 1px solid var(--color-borde);
  border-bottom: 1px solid var(--color-borde);
}

.timeline-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 3.5rem;
  position: relative;
}

.timeline-grid::before {
  content: '';
  position: absolute;
  top: 32px;
  left: 5%;
  right: 5%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-borde) 0%, var(--color-petroleo-borde) 50%, var(--color-borde) 100%);
  z-index: 1;
}

.timeline-tarjeta {
  background: var(--color-papel);
  border: 1px solid var(--color-borde);
  border-radius: var(--radio-md);
  padding: 1.75rem 1.5rem;
  position: relative;
  z-index: 2;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
}

.timeline-tarjeta:hover {
  transform: translateY(-4px);
  background: var(--color-papel-puro);
  border-color: var(--color-petroleo-borde);
  box-shadow: var(--sombra-md);
}

.timeline-cab {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.timeline-paso-badge {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--color-tinta);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--fuente-mono);
  font-size: 0.85rem;
  font-weight: 700;
  box-shadow: 0 0 0 6px var(--color-papel);
}

.timeline-tarjeta:hover .timeline-paso-badge {
  background: var(--color-petroleo);
  box-shadow: 0 0 0 6px var(--color-papel-puro), 0 0 12px rgba(31, 111, 139, 0.3);
}

.timeline-ico {
  color: var(--color-petroleo);
  width: 28px;
  height: 28px;
}

.timeline-titulo {
  font-family: var(--fuente-titulos);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-tinta);
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.timeline-desc {
  font-size: 0.92rem;
  color: var(--color-tinta-muted);
  line-height: 1.55;
  flex: 1;
}

/* --------------------------------------------------------------------------
   11. Datos verificables de la empresa (Auditoría limpia)
   -------------------------------------------------------------------------- */
.seccion-datos {
  background: var(--color-papel);
}

.datos-grid {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: 3.5rem;
  align-items: center;
}

.tabla-datos {
  background: var(--color-papel-puro);
  border: 1px solid var(--color-borde);
  border-radius: var(--radio-lg);
  box-shadow: var(--sombra-md);
  overflow: hidden;
}

.datos-fila {
  display: grid;
  grid-template-columns: 140px 1fr;
  padding: 1.1rem 1.5rem;
  border-bottom: 1px solid var(--color-borde-fino);
  font-size: 0.95rem;
}

.datos-fila:last-child {
  border-bottom: none;
}

.datos-etiqueta {
  color: var(--color-tinta-muted);
  font-weight: 500;
  font-size: 0.88rem;
}

.datos-valor {
  color: var(--color-tinta);
  font-weight: 600;
}

.caja-aviso {
  background: var(--color-petroleo-luz);
  border: 1px solid var(--color-petroleo-borde);
  border-radius: var(--radio-md);
  padding: 1.5rem;
  margin-top: 1.5rem;
}

.caja-aviso p {
  font-size: 0.88rem;
  color: var(--color-petroleo-oscuro);
  line-height: 1.6;
}

.caja-aviso strong {
  display: block;
  margin-bottom: 0.35rem;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   12. Formulario de demostración interactivo
   -------------------------------------------------------------------------- */
.seccion-contacto {
  background: var(--color-papel-puro);
  border-top: 1px solid var(--color-borde);
}

.contacto-grid {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 4rem;
}

.form-demo {
  background: var(--color-papel);
  border: 1px solid var(--color-borde);
  border-radius: var(--radio-lg);
  padding: 2.25rem 2rem;
  box-shadow: var(--sombra-md);
}

.form-grupo {
  margin-bottom: 1.35rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-tinta);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: var(--radio-sm);
  border: 1px solid var(--color-borde-fuerte);
  background: var(--color-papel-puro);
  font-family: var(--fuente-sans);
  font-size: 0.95rem;
  color: var(--color-tinta);
  transition: all 0.2s ease;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-petroleo);
  box-shadow: 0 0 0 3px rgba(31, 111, 139, 0.15);
}

.form-input[aria-invalid="true"],
.form-textarea[aria-invalid="true"] {
  border-color: #EF4444;
  background-color: #FEF2F2;
}

.form-error {
  font-size: 0.8rem;
  color: #DC2626;
  min-height: 1.1rem;
}

.form-textarea {
  min-height: 110px;
  resize: vertical;
}

.form-estado {
  display: none;
  margin-top: 1.25rem;
  padding: 1rem 1.25rem;
  border-radius: var(--radio-sm);
  background: #ECFDF5;
  border: 1px solid #A7F3D0;
  color: #065F46;
  font-size: 0.9rem;
}

.form-estado.activo {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

/* --------------------------------------------------------------------------
   13. Pie de página (Footer)
   -------------------------------------------------------------------------- */
.footer-principal {
  background: #09121D;
  color: #94A3B8;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 4.5rem 0 2.5rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 3.5rem;
  padding-bottom: 3.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-marca .logo-cotel {
  color: #FFFFFF;
}

.footer-desc {
  font-size: 0.9rem;
  color: #64748B;
  margin-top: 1rem;
  max-width: 360px;
  line-height: 1.6;
}

.footer-col h4 {
  color: #F1F5F9;
  font-size: 0.92rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  letter-spacing: 0.02em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  font-size: 0.88rem;
  color: #94A3B8;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: #FFFFFF;
}

.footer-bottom {
  padding-top: 2.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
  font-size: 0.82rem;
  color: #64748B;
}

.footer-modelos-selector {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.footer-modelos-selector a {
  padding: 0.25rem 0.65rem;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.05);
  color: #CBD5E1;
  font-size: 0.78rem;
  transition: all 0.2s ease;
}

.footer-modelos-selector a:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #FFFFFF;
}

.footer-modelos-selector a[aria-current="page"] {
  background: var(--color-petroleo);
  color: #FFFFFF;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   14. Páginas internas: Estilos complementarios
   -------------------------------------------------------------------------- */
.pagina-hero {
  padding: 4.5rem 0 3.5rem;
  background: linear-gradient(180deg, rgba(245, 243, 238, 0.6) 0%, rgba(237, 241, 245, 0.9) 100%);
  border-bottom: 1px solid var(--color-borde);
}

.grid-dos-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

.card-metodologia {
  background: var(--color-papel-puro);
  border: 1px solid var(--color-borde);
  border-radius: var(--radio-lg);
  padding: 2.25rem;
  box-shadow: var(--sombra-sm);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card-metodologia:hover {
  transform: translateY(-3px);
  box-shadow: var(--sombra-md);
  border-color: var(--color-petroleo-borde);
}

.card-meta-cab {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-paso-tag {
  font-family: var(--fuente-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-petroleo);
  background: var(--color-petroleo-luz);
  border: 1px solid var(--color-petroleo-borde);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
}

.card-metodologia h3 {
  font-family: var(--fuente-titulos);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-tinta);
}

.card-metodologia p {
  color: var(--color-tinta-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.lista-rigor {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-top: 0.5rem;
  border-top: 1px solid var(--color-borde-fino);
  padding-top: 1rem;
}

.lista-rigor li {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.88rem;
  color: var(--color-tinta-suave);
}

.lista-rigor svg {
  color: var(--color-petroleo);
  flex-shrink: 0;
  margin-top: 3px;
}

/* --------------------------------------------------------------------------
   15. Responsive y Media Queries
   -------------------------------------------------------------------------- */
@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .hero-header {
    max-width: 100%;
  }
  .consola-cuerpo {
    grid-template-columns: 1fr;
  }
  .consola-codigo {
    border-right: none;
    border-bottom: 1px solid var(--color-codigo-borde);
  }
  .timeline-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .timeline-grid::before {
    display: none;
  }
  .datos-grid,
  .contacto-grid,
  .footer-top {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 840px) {
  .nav-principal,
  .header-cta-wrap .btn-primary {
    display: none;
  }
  .btn-hamb {
    display: flex;
  }
  .grid-dos-col {
    grid-template-columns: 1fr;
  }
  .timeline-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .demo-bar__in {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
    padding: 0.6rem 1rem;
  }
  .demo-bar__modelos {
    flex-wrap: wrap;
  }
  .seccion {
    padding: 3.5rem 0;
  }
  .datos-fila {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
  .form-demo {
    padding: 1.5rem 1.25rem;
  }
}

/* --------------------------------------------------------------------------
   16. Soporte para prefers-reduced-motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .cortina-cursor {
    display: none !important;
  }
  .svg-cable-pulso {
    animation: none !important;
  }
  .consola-led {
    animation: none !important;
  }
}