/* ==========================================================================
   UNIVERSIDAD INTERNACIONAL VIDA · MODELO 3: VIDEO Y SCROLL
   Estilos corporativos, diseño inmersivo luminoso y contraste WCAG AA
   ========================================================================== */

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

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

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

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

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

:root {
  --bg-crema: #F5F3EE;
  --bg-card: #FFFFFF;
  --tinta: #14161C;
  --tinta-suave: #4A505E;
  --azul: #1F4E79;
  --azul-noche: #0E2238;
  --azul-profundo: #071321;
  --dorado: #B07A1E;
  --dorado-texto: #8A5C0F;
  --dorado-claro: #E5B25D;
  --dorado-hover: #6F4A0B;
  --dorado-suave: rgba(176, 122, 30, 0.12);
  --dorado-borde: rgba(176, 122, 30, 0.35);
  --blanco: #FFFFFF;
  --borde: rgba(20, 22, 28, 0.12);
  --borde-claro: rgba(255, 255, 255, 0.18);
  
  --font-serif: 'Instrument Serif', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-tight: 'Inter Tight', sans-serif;
  
  --header-h: 96px;
  --ancho-max: 1280px;
  --radio-sm: 4px;
  --radio-md: 8px;
  --radio-lg: 16px;
  
  --sombra-suave: 0 4px 20px rgba(14, 34, 56, 0.06);
  --sombra-elevada: 0 12px 36px rgba(14, 34, 56, 0.12);
  --transicion-base: 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-crema);
  color: var(--tinta);
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}

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

/* Enlace accesible para saltar al contenido */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  background: var(--dorado-texto);
  color: var(--blanco);
  padding: 10px 18px;
  border-radius: var(--radio-sm);
  font-weight: 600;
  z-index: 99999;
  text-decoration: none;
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 16px;
}

/* --------------------------------------------------------------------------
   CORTINA DE TRANSICIÓN ENTRE PÁGINAS
   -------------------------------------------------------------------------- */
.golden-curtain {
  position: fixed;
  inset: 0;
  z-index: 10000;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  visibility: hidden;
}

.golden-curtain__panel {
  flex: 1;
  background: linear-gradient(135deg, var(--azul-noche) 0%, var(--azul) 60%, #153556 100%);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 50px rgba(0, 0, 0, 0.4);
}

.golden-curtain__panel::after {
  content: '';
  position: absolute;
  inset: 0;
  border-bottom: 3px solid var(--dorado);
  opacity: 0.85;
}

.golden-curtain__badge {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--blanco);
  font-family: var(--font-serif);
  font-size: 2.2rem;
  letter-spacing: 0.03em;
  transform: translateY(0);
}

.golden-curtain__badge svg {
  width: 32px;
  height: 32px;
  color: var(--dorado);
}

/* Cursor sutil para desktop */
.cursor-dot, .cursor-ring {
  position: fixed;
  pointer-events: none;
  z-index: 9999;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s ease;
}

.cursor-dot {
  width: 6px;
  height: 6px;
  background-color: var(--dorado);
}

.cursor-ring {
  width: 34px;
  height: 34px;
  border: 1px solid rgba(176, 122, 30, 0.45);
  transition: width 0.2s ease, height 0.2s ease, border-color 0.2s ease;
}

.cursor-ring.is-hovering {
  width: 52px;
  height: 52px;
  border-color: var(--dorado);
  background-color: rgba(176, 122, 30, 0.08);
}

@media (hover: none) or (pointer: coarse) {
  .cursor-dot, .cursor-ring {
    display: none !important;
  }
}

/* --------------------------------------------------------------------------
   ENCABEZADO COMPACTO
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: var(--bg-crema);
  transition: background-color var(--transicion-base), box-shadow var(--transicion-base);
}

.site-header.is-scrolled {
  box-shadow: 0 4px 20px rgba(14, 34, 56, 0.08);
}

/* Barra de aviso de demostración: una sola línea en escritorio */
.demo-bar {
  background-color: var(--azul-noche);
  color: #E2E8F0;
  font-size: 0.75rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.demo-bar__inner {
  max-width: var(--ancho-max);
  margin: 0 auto;
  padding: 6px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  white-space: nowrap;
}

.demo-bar__info {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.demo-bar__info svg {
  flex-shrink: 0;
  color: var(--dorado);
}

.demo-bar__info span {
  overflow: hidden;
  text-overflow: ellipsis;
}

.demo-bar__models {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.demo-bar__models-label {
  color: #94A3B8;
  font-size: 0.72rem;
  font-weight: 500;
}

.demo-bar__model-link {
  color: #CBD5E1;
  text-decoration: none;
  padding: 2px 7px;
  border-radius: 3px;
  font-size: 0.72rem;
  border: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

.demo-bar__model-link:hover {
  color: var(--blanco);
  border-color: rgba(255, 255, 255, 0.25);
}

.demo-bar__model-link.is-current {
  color: var(--blanco);
  background-color: rgba(176, 122, 30, 0.28);
  border-color: var(--dorado);
  font-weight: 600;
}

/* Navegación principal */
.main-nav {
  max-width: var(--ancho-max);
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--azul-noche);
}

.nav__brand-badge {
  background-color: var(--azul-noche);
  color: var(--dorado-claro);
  font-family: var(--font-tight);
  font-size: 0.95rem;
  font-weight: 800;
  padding: 4px 8px;
  border-radius: var(--radio-sm);
  letter-spacing: 0.05em;
  border: 1px solid var(--dorado-borde);
}

.nav__brand-title {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.1;
  color: var(--azul-noche);
}

.nav__links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 28px;
}

.nav__link {
  text-decoration: none;
  color: var(--tinta-suave);
  font-size: 0.92rem;
  font-weight: 500;
  position: relative;
  padding: 6px 0;
  transition: color var(--transicion-base);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--dorado);
  transition: width var(--transicion-base);
}

.nav__link:hover {
  color: var(--azul-noche);
}

.nav__link:hover::after,
.nav__link.is-active::after {
  width: 100%;
}

.nav__link.is-active {
  color: var(--azul-noche);
  font-weight: 600;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 20px;
  border-radius: var(--radio-sm);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transicion-base);
  line-height: 1.3;
}

.btn--primary {
  background-color: var(--azul-noche);
  color: var(--blanco);
  border-color: var(--azul-noche);
}

.btn--primary:hover {
  background-color: var(--azul);
  border-color: var(--azul);
  transform: translateY(-1px);
}

.btn--gold {
  background-color: var(--dorado-texto);
  color: var(--blanco);
  border-color: var(--dorado-texto);
}

.btn--gold:hover {
  background-color: var(--dorado-hover);
  border-color: var(--dorado-hover);
  transform: translateY(-1px);
}

.btn--outline {
  background-color: transparent;
  color: var(--azul-noche);
  border-color: var(--azul-noche);
}

.btn--outline:hover {
  background-color: var(--azul-noche);
  color: var(--blanco);
}

.btn--white-outline {
  background-color: rgba(255, 255, 255, 0.12);
  color: var(--blanco);
  border-color: rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(8px);
}

.btn--white-outline:hover {
  background-color: var(--blanco);
  color: var(--azul-noche);
  border-color: var(--blanco);
}

.btn--sm {
  padding: 7px 16px;
  font-size: 0.85rem;
}

.btn--lg {
  padding: 13px 28px;
  font-size: 1rem;
}

/* Botón hamburguesa móvil */
.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
  z-index: 1010;
}

.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--azul-noche);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav__toggle[aria-expanded="true"] span:first-child {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav__toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-7px) rotate(-45deg);
}

/* Cajón móvil a pantalla completa */
.mobile-drawer {
  position: fixed;
  inset: 0;
  background-color: var(--azul-noche);
  color: var(--blanco);
  z-index: 1005;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 100px 28px 40px;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.mobile-drawer.is-open {
  transform: translateX(0);
}

.mobile-drawer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.mobile-drawer__link {
  font-family: var(--font-serif);
  font-size: 2rem;
  color: #E2E8F0;
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 12px;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.mobile-drawer__link:hover,
.mobile-drawer__link.is-active {
  color: var(--dorado-claro);
  padding-left: 8px;
}

.mobile-drawer__models {
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.mobile-drawer__models-title {
  font-size: 0.8rem;
  color: #94A3B8;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.mobile-drawer__models-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.mobile-drawer__models-list a {
  background: rgba(255, 255, 255, 0.06);
  color: #E2E8F0;
  text-decoration: none;
  padding: 8px 12px;
  border-radius: var(--radio-sm);
  font-size: 0.8rem;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-drawer__models-list a.is-current {
  background-color: var(--dorado);
  color: var(--blanco);
  font-weight: 600;
  border-color: var(--dorado);
}

/* --------------------------------------------------------------------------
   HERO CINEMÁTICO CON VIDEO Y LUZ
   -------------------------------------------------------------------------- */
.hero-video-section {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: var(--azul-noche);
  color: var(--blanco);
}

.hero-video-section__media {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-video-section__poster {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
  filter: brightness(1.12) saturate(1.15);
  transition: opacity 0.5s ease;
}

.hero-video-section__video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 2;
  filter: brightness(1.12) saturate(1.15);
}

/* Degradado focalizado detrás del texto: NO cubre todo el cuadro para que el video conserve luz y color */
.hero-video-section__backdrop {
  position: absolute;
  inset: 0;
  z-index: 3;
  background: linear-gradient(
    90deg,
    rgba(14, 34, 56, 0.76) 0%,
    rgba(14, 34, 56, 0.58) 30%,
    rgba(14, 34, 56, 0.2) 52%,
    transparent 68%
  );
}

.hero-video-section__container {
  position: relative;
  z-index: 4;
  width: 100%;
  max-width: var(--ancho-max);
  margin: 0 auto;
  padding: 80px 24px;
}

.hero-video-section__copy {
  max-width: 640px;
  text-shadow: 0 1px 14px rgba(7, 19, 33, 0.55);
}

.hero-video-section__copy .btn {
  text-shadow: none;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(176, 122, 30, 0.22);
  color: #F8E7C8;
  border: 1px solid var(--dorado-borde);
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 22px;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 5.5vw, 4.8rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--blanco);
  margin-bottom: 20px;
}

.hero-title .accent-gold {
  color: #E5B25D;
  font-style: italic;
}

.hero-lead {
  font-size: clamp(1.05rem, 1.8vw, 1.28rem);
  line-height: 1.55;
  color: #E2E8F0;
  margin-bottom: 32px;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 40px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 28px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-stat-item {
  display: flex;
  flex-direction: column;
}

.hero-stat-label {
  font-size: 0.75rem;
  color: #CBD5E1;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-stat-value {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: var(--blanco);
  font-weight: 400;
}

/* Indicador de scroll */
.hero-scroll-cue {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #CBD5E1;
  font-size: 0.8rem;
  margin-top: 12px;
  opacity: 0.85;
}

.hero-scroll-cue svg {
  animation: bounceDown 1.8s infinite;
}

@keyframes bounceDown {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* --------------------------------------------------------------------------
   STORYTELLING EN CANVAS CON SCRUBBING POR SCROLL
   -------------------------------------------------------------------------- */
.story-scroll-section {
  position: relative;
  background-color: var(--azul-profundo);
  color: var(--blanco);
}

.story-scroll-section__sticky {
  position: sticky;
  top: 0;
  height: 100vh;
  width: 100%;
  overflow: hidden;
  display: flex;
  align-items: center;
}

.story-scroll-section__canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}

/* Degradado focalizado detrás del texto: izquierda para escritorio */
.story-scroll-section__grad {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background: linear-gradient(
    90deg,
    rgba(7, 19, 33, 0.88) 0%,
    rgba(7, 19, 33, 0.7) 34%,
    rgba(7, 19, 33, 0.22) 58%,
    transparent 72%
  );
}

.story-scroll-section__content {
  position: relative;
  z-index: 3;
  width: 100%;
  max-width: var(--ancho-max);
  margin: 0 auto;
  padding: 0 24px;
  pointer-events: none;
}

.story-card-wrapper {
  max-width: 540px;
  pointer-events: auto;
}

/* Riel de capítulos interactivo */
.chapter-nav-rail {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
}

.chapter-step-badge {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #CBD5E1;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  transition: all 0.3s ease;
  cursor: pointer;
}

.chapter-step-badge.is-active {
  background: var(--dorado-texto);
  border-color: var(--dorado-claro);
  color: var(--blanco);
  box-shadow: 0 0 12px rgba(176, 122, 30, 0.5);
}

/* Tarjeta individual de capítulo */
.chapter-card {
  display: none;
  animation: fadeInCard 0.4s ease forwards;
}

.chapter-card.is-visible {
  display: block;
}

@keyframes fadeInCard {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.chapter-num {
  font-family: var(--font-tight);
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--dorado-claro);
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.chapter-title {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 3.8vw, 3.4rem);
  font-weight: 400;
  line-height: 1.1;
  color: var(--blanco);
  margin-bottom: 16px;
}

.chapter-desc {
  font-size: 1.05rem;
  line-height: 1.6;
  color: #E2E8F0;
  margin-bottom: 24px;
}

.chapter-features {
  list-style: none;
  margin-bottom: 28px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.chapter-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: #CBD5E1;
}

.chapter-feature-item svg {
  color: var(--dorado);
  flex-shrink: 0;
}

/* Indicador de progreso de scroll en esquina inferior */
.story-scroll-hud {
  position: absolute;
  bottom: 24px;
  right: 24px;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(14, 34, 56, 0.7);
  backdrop-filter: blur(8px);
  padding: 8px 16px;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  font-size: 0.75rem;
  color: #CBD5E1;
  pointer-events: none;
}

.story-scroll-hud__progress {
  width: 60px;
  height: 4px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  overflow: hidden;
}

.story-scroll-hud__bar {
  height: 100%;
  width: 0%;
  background: var(--dorado);
  transition: width 0.1s linear;
}

/* --------------------------------------------------------------------------
   SECCIONES DE CONTENIDO GENERAL
   -------------------------------------------------------------------------- */
.section {
  padding: 96px 24px;
}

.section--crema {
  background-color: var(--bg-crema);
}

.section--blanco {
  background-color: var(--blanco);
}

.section--noche {
  background-color: var(--azul-noche);
  color: var(--blanco);
}

.container {
  max-width: var(--ancho-max);
  margin: 0 auto;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 60px;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--dorado-texto);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 3.5vw, 3rem);
  font-weight: 400;
  line-height: 1.15;
  color: var(--azul-noche);
  margin-bottom: 16px;
}

.section--noche .section-title {
  color: var(--blanco);
}

.section-lead {
  font-size: 1.08rem;
  color: var(--tinta-suave);
  line-height: 1.6;
}

.section--noche .section-lead {
  color: #CBD5E1;
}

/* Cuadrícula de pilares institucionales */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
}

.pillar-card {
  background: var(--bg-card);
  padding: 36px 30px;
  border-radius: var(--radio-md);
  border: 1px solid var(--borde);
  transition: transform var(--transicion-base), box-shadow var(--transicion-base), border-color var(--transicion-base);
  display: flex;
  flex-direction: column;
}

.pillar-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--sombra-elevada);
  border-color: var(--dorado-borde);
}

.pillar-icon {
  width: 48px;
  height: 48px;
  background: var(--dorado-suave);
  color: var(--dorado);
  border-radius: var(--radio-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}

.pillar-card h3 {
  font-family: var(--font-serif);
  font-size: 1.65rem;
  line-height: 1.25;
  color: var(--azul-noche);
  margin-bottom: 14px;
}

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

/* Sección de video secundario (Biblioteca/Estudio) */
.video-showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.video-frame {
  position: relative;
  border-radius: var(--radio-lg);
  overflow: hidden;
  box-shadow: var(--sombra-elevada);
  aspect-ratio: 16 / 9;
  background-color: var(--azul-noche);
}

.video-frame video,
.video-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.video-frame-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px 20px;
  background: linear-gradient(to top, rgba(14, 34, 56, 0.85), transparent);
  color: var(--blanco);
  font-size: 0.78rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Cuadrícula detallada para oferta.html */
.offer-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.offer-card {
  background: var(--bg-card);
  border-radius: var(--radio-md);
  padding: 40px;
  border: 1px solid var(--borde);
  display: flex;
  flex-direction: column;
  transition: transform var(--transicion-base), box-shadow var(--transicion-base);
}

.offer-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--sombra-elevada);
}

.offer-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.offer-card__num {
  font-family: var(--font-tight);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--dorado);
}

.offer-card__badge {
  background: var(--dorado-suave);
  color: var(--dorado);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 20px;
  letter-spacing: 0.05em;
}

.offer-card h3 {
  font-family: var(--font-serif);
  font-size: 2.1rem;
  color: var(--azul-noche);
  margin-bottom: 14px;
}

.offer-card p {
  color: var(--tinta-suave);
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 24px;
}

.offer-card__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 30px;
  padding-top: 18px;
  border-top: 1px solid var(--borde);
}

.offer-card__list li {
  font-size: 0.9rem;
  color: var(--tinta);
  display: flex;
  align-items: center;
  gap: 8px;
}

.offer-card__list li svg {
  color: var(--dorado);
  flex-shrink: 0;
}

.offer-card .btn {
  margin-top: auto;
  align-self: flex-start;
}

/* --------------------------------------------------------------------------
   FORMULARIO DE CONTACTO / ADMISIONES (DEMOSTRACIÓN)
   -------------------------------------------------------------------------- */
.admissions-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.admissions-form-box {
  background: var(--bg-card);
  padding: 44px 38px;
  border-radius: var(--radio-lg);
  border: 1px solid var(--borde);
  box-shadow: var(--sombra-elevada);
}

.form-demo-badge {
  background-color: #FEF3C7;
  color: #92400E;
  border: 1px solid #FDE68A;
  padding: 8px 14px;
  border-radius: var(--radio-sm);
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--azul-noche);
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  padding: 12px 14px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--tinta);
  background-color: #F8FAFC;
  border: 1px solid #CBD5E1;
  border-radius: var(--radio-sm);
  transition: border-color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus {
  outline: none;
  background-color: var(--blanco);
  border-color: var(--azul);
  box-shadow: 0 0 0 3px rgba(31, 78, 121, 0.12);
}

.form-alert {
  display: none;
  padding: 14px 18px;
  border-radius: var(--radio-sm);
  font-size: 0.88rem;
  line-height: 1.5;
  margin-bottom: 20px;
  background-color: #ECFDF5;
  color: #065F46;
  border: 1px solid #A7F3D0;
}

/* Pasos del proceso */
.steps-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.step-item {
  display: flex;
  gap: 20px;
}

.step-num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--dorado-suave);
  color: var(--dorado-texto);
  font-family: var(--font-tight);
  font-weight: 800;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 1px solid var(--dorado-borde);
}

.step-item h4 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: var(--azul-noche);
  margin-bottom: 6px;
}

.step-item p {
  font-size: 0.92rem;
  color: var(--tinta-suave);
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   PIE DE PÁGINA
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--azul-noche);
  color: #E2E8F0;
  padding: 60px 24px 30px;
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-inner {
  max-width: var(--ancho-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1.5fr 1.5fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-brand__name {
  font-family: var(--font-serif);
  font-size: 1.7rem;
  color: var(--blanco);
  margin-bottom: 8px;
}

.footer-brand__city {
  font-size: 0.88rem;
  color: #94A3B8;
  margin-bottom: 14px;
}

.footer-brand__disclaimer {
  font-size: 0.8rem;
  color: #94A3B8;
  line-height: 1.5;
  max-width: 420px;
}

.footer-links-col h4,
.footer-models-col h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--dorado-claro);
  margin-bottom: 18px;
}

.footer-links-list,
.footer-models-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links-list a,
.footer-models-list a {
  color: #CBD5E1;
  text-decoration: none;
  font-size: 0.88rem;
  transition: color 0.15s ease, padding-left 0.15s ease;
}

.footer-links-list a:hover,
.footer-models-list a:hover {
  color: var(--blanco);
  padding-left: 4px;
}

.footer-models-list a.is-current {
  color: var(--dorado-claro);
  font-weight: 600;
}

.footer-bottom {
  max-width: var(--ancho-max);
  margin: 24px auto 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  color: #64748B;
  flex-wrap: wrap;
  gap: 12px;
}

/* --------------------------------------------------------------------------
   ICONOS SVG DE LÍNEA
   -------------------------------------------------------------------------- */
.ico {
  display: inline-block;
  width: 1.25em;
  height: 1.25em;
  stroke-width: 1.8;
  stroke: currentColor;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  vertical-align: middle;
}

.ico--sm {
  width: 1em;
  height: 1em;
}

.ico--lg {
  width: 1.75em;
  height: 1.75em;
}

/* --------------------------------------------------------------------------
   RESPONSIVE DESIGN (1280px, 992px, 768px, 390px)
   -------------------------------------------------------------------------- */
@media (max-width: 1100px) {
  .demo-bar__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    white-space: normal;
  }
}

@media (max-width: 992px) {
  .nav__links,
  .nav__actions .btn {
    display: none;
  }
  
  .nav__toggle {
    display: flex;
  }
  
  .video-showcase,
  .offer-grid,
  .admissions-layout {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 60px 18px;
  }

  .hero-video-section__container {
    padding: 60px 18px;
  }

  /* Encuadre vertical: se desplaza la toma a la derecha, fuera del cartel */
  .hero-video-section__video,
  .hero-video-section__poster {
    object-position: 72% center;
  }

  .hero-stats {
    flex-wrap: wrap;
    gap: 16px 24px;
  }

  .hero-video-section__backdrop {
    background: linear-gradient(
      180deg,
      rgba(14, 34, 56, 0.35) 0%,
      rgba(14, 34, 56, 0.7) 50%,
      rgba(14, 34, 56, 0.88) 100%
    );
  }

  /* Modo móvil para canvas storytelling: degradado desde abajo */
  .story-scroll-section__grad {
    background: linear-gradient(
      180deg,
      rgba(7, 19, 33, 0.2) 0%,
      rgba(7, 19, 33, 0.85) 45%,
      rgba(7, 19, 33, 0.98) 100%
    );
  }

  .story-scroll-section__content {
    display: flex;
    align-items: flex-end;
    padding-bottom: 70px;
  }

  .chapter-title {
    font-size: 2rem;
  }

  .chapter-desc {
    font-size: 0.95rem;
  }
}

@media (max-width: 480px) {
  .demo-bar__inner {
    padding: 8px 14px;
    font-size: 0.7rem;
  }

  .demo-bar__models {
    flex-wrap: wrap;
    gap: 2px;
  }

  .demo-bar__models-label,
  .demo-bar__model-link {
    font-size: 0.66rem;
  }

  .demo-bar__model-link {
    padding: 2px 4px;
  }

  .demo-bar__extra {
    display: none;
  }

  .main-nav {
    padding: 10px 14px;
  }

  .nav__brand-title {
    font-size: 1.25rem;
  }

  .hero-title {
    font-size: 2.3rem;
  }

  .admissions-form-box {
    padding: 26px 18px;
  }

  .offer-card {
    padding: 26px 20px;
  }
}

/* --------------------------------------------------------------------------
   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;
  }
  
  .golden-curtain {
    display: none !important;
  }
  
  .hero-video-section__video {
    display: none !important;
  }
}