/* ==========================================================================
   GREEN SKIN - Ecomuro Escolar Inteligente
   Diseño Web Moderno, Ecológico y Profesional
   Inspirado en el diseño original de BIOTEC NIETISTA | STEM+ Colombia 2026
   ========================================================================== */

:root {
  /* Paleta Verde & Tonos Naturales */
  --color-primary-950: #05140b;
  --color-primary-900: #0a2114;
  --color-primary-800: #0e2d1d;
  --color-primary-700: #143e28;
  --color-primary-600: #1b5336;
  --color-primary-500: #236c47;
  --color-primary-400: #2e8b5c;
  --color-primary-300: #48b780;
  --color-primary-200: #86d8ad;
  --color-primary-100: #c9eedb;
  --color-primary-50:  #eef8f3;

  /* Tonos Terrosos, Dorados y Acentos */
  --color-accent-gold: #c8963e;
  --color-accent-amber: #b45309;
  --color-accent-light: #fbf5e8;
  --color-accent-border: #e8d7b5;

  /* Superficies y Fondos */
  --bg-page: #f6f8f5;
  --bg-card: #ffffff;
  --bg-card-subtle: #f0f4ee;
  --bg-card-warm: #fcfbf7;
  --bg-glass: rgba(255, 255, 255, 0.92);
  --bg-glass-dark: rgba(10, 33, 20, 0.92);

  /* Textos */
  --text-primary: #18261e;
  --text-secondary: #3d5045;
  --text-muted: #66796e;
  --text-inverse: #ffffff;
  --text-inverse-muted: #d2e4d9;

  /* Bordes y Sombras */
  --border-light: #e0e6df;
  --border-card: rgba(20, 62, 40, 0.08);
  --border-focus: #236c47;
  --shadow-sm: 0 2px 8px rgba(10, 33, 20, 0.05);
  --shadow-md: 0 8px 24px rgba(10, 33, 20, 0.08);
  --shadow-lg: 0 16px 36px rgba(10, 33, 20, 0.14);
  --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.06);

  /* Tipografías */
  --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Transiciones */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);

  /* Dimensiones */
  --nav-height: 76px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --container-max: 1220px;
}

/* Reset y Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 20px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text-primary);
  background-color: var(--bg-page);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img, picture, svg, video {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

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

.section-alt {
  background-color: var(--bg-card-subtle);
}

.section-dark {
  background-color: var(--color-primary-900);
  color: var(--text-inverse);
}

/* Tipografía de Títulos y Etiquetas */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary-600);
  background: var(--color-primary-100);
  padding: 0.35rem 0.95rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.9rem;
}

.section-dark .section-tag {
  color: var(--color-primary-100);
  background: rgba(255, 255, 255, 0.12);
}

.section-tag.gold {
  color: var(--color-accent-amber);
  background: var(--color-accent-light);
  border: 1px solid var(--color-accent-border);
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-primary-800);
  margin-bottom: 1rem;
}

.section-dark .section-title {
  color: var(--text-inverse);
}

.section-title .highlight {
  color: var(--color-primary-500);
  font-style: italic;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 680px;
  line-height: 1.6;
}

.section-dark .section-subtitle {
  color: var(--text-inverse-muted);
}

.section-header-center {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-header-center .section-subtitle {
  margin-left: auto;
  margin-right: auto;
}

/* ==========================================================================
   HEADER & NAVBAR
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background-color: rgba(8, 26, 15, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  background-color: rgba(6, 20, 11, 0.96);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.28);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1.5rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-logo-img {
  height: 48px;
  width: auto;
  max-width: 88px;
  object-fit: contain;
  background: #ffffff;
  padding: 3px 6px;
  border-radius: var(--radius-sm);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

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

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: #ffffff;
  line-height: 1.15;
}

.brand-pill {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary-100);
  background: rgba(255, 255, 255, 0.15);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  display: inline-block;
  align-self: flex-start;
  margin-top: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-link {
  font-size: 0.925rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.88);
  position: relative;
  padding: 0.4rem 0;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--color-primary-300);
  border-radius: 2px;
  transition: width var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
  color: #ffffff;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-primary-400);
  color: #ffffff;
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.55rem 1.25rem;
  border-radius: var(--radius-full);
  flex-shrink: 0;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.nav-cta-btn:hover {
  background: var(--color-primary-300);
  color: var(--color-primary-900);
  transform: translateY(-1px);
}

.mobile-toggle {
  display: none;
  color: #ffffff;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
}

.mobile-toggle svg {
  width: 26px;
  height: 26px;
}

/* ==========================================================================
   HERO / PORTADA PRINCIPAL (FONDO BOTÁNICO RENOVADO Y ALTO CONTRASTE)
   ========================================================================== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-height) + 3.5rem) 0 4.5rem;
  color: #ffffff;
  background: url('../assets/hero_bg_nuevo.jpg') center center/cover no-repeat;
  overflow: hidden;
}

/* Capa de contraste con degradado botánico */
.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    rgba(5, 20, 11, 0.93) 0%,
    rgba(10, 35, 20, 0.82) 48%,
    rgba(14, 48, 29, 0.94) 100%
  );
  z-index: 1;
}

.hero-container {
  position: relative;
  z-index: 2;
  width: 100%;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.18fr 0.82fr;
  gap: 3.5rem;
  align-items: center;
}

/* Columna de Texto */
.hero-text-col {
  text-align: left;
}

.hero-meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #fef08a;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
  padding: 0.5rem 1.15rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(250, 204, 21, 0.4);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 5.5vw, 4.4rem);
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1.08;
  color: #ffffff;
  margin-bottom: 0.5rem;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1.35rem, 2.5vw, 1.85rem);
  font-weight: 400;
  color: var(--color-primary-200);
  margin-bottom: 1.35rem;
  display: block;
}

.hero-desc {
  font-size: 1.075rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.94);
  margin-bottom: 2rem;
  max-width: 580px;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.35);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.85rem 1.85rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
  text-decoration: none;
}

.btn-primary {
  background-color: #ffffff;
  color: var(--color-primary-900);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
  background-color: var(--color-primary-50);
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(0, 0, 0, 0.3);
}

.btn-outline-white {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(6px);
}

.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.22);
  border-color: #ffffff;
  transform: translateY(-2px);
}

.btn-eco {
  background: var(--color-primary-500);
  color: #ffffff;
}

.btn-eco:hover {
  background: var(--color-primary-400);
  transform: translateY(-2px);
}

/* Barra de Metas Clave dentro de Hero */
.hero-stats-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  background: rgba(8, 26, 15, 0.78);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-md);
  padding: 1.15rem 1.25rem;
  max-width: 580px;
}

.stat-item {
  text-align: center;
  border-right: 1px solid rgba(255, 255, 255, 0.12);
  padding: 0 0.5rem;
}

.stat-item:last-child {
  border-right: none;
}

.stat-number {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 700;
  color: #ffffff;
  display: block;
}

.stat-number.gold {
  color: var(--color-accent-gold);
}

.stat-label {
  font-size: 0.725rem;
  color: var(--text-inverse-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 0.2rem;
  display: block;
}

/* Columna Visual / Tarjeta del Logotipo Oficial */
.hero-visual-col {
  display: flex;
  justify-content: center;
}

.hero-logo-card {
  width: 100%;
  max-width: 440px;
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.9);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.hero-logo-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.42);
}

.hero-logo-img-wrapper {
  width: 100%;
  max-width: 380px;
  background: #ffffff;
  border-radius: var(--radius-md);
  padding: 0.5rem;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-logo-img {
  width: 100%;
  height: auto;
  max-height: 240px;
  object-fit: contain;
  display: block;
}

.hero-inst-badge {
  font-size: 0.775rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary-700);
  background: var(--color-primary-50);
  border: 1px solid var(--color-primary-200);
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.65rem;
}

.hero-inst-details {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.45;
  margin-bottom: 1.15rem;
}

.hero-chat-trigger-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary-700);
  background: var(--color-primary-100);
  padding: 0.55rem 1.15rem;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  border: 1px solid var(--color-primary-200);
}

.hero-chat-trigger-btn:hover {
  background: var(--color-primary-200);
  color: var(--color-primary-900);
  transform: translateY(-1px);
}

/* ==========================================================================
   SECCIÓN: PROYECTO (¿Qué es GREEN SKIN?)
   ========================================================================== */
.project-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}

.project-text p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 1.35rem;
  line-height: 1.75;
}

.project-text strong {
  color: var(--color-primary-800);
  font-weight: 600;
}

.project-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2rem;
}

.highlight-box {
  background: var(--bg-card);
  padding: 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
}

.highlight-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  background: var(--color-primary-100);
  color: var(--color-primary-700);
  display: flex;
  align-items: center;
  justify-content: center;
}

.highlight-content h4 {
  font-size: 0.925rem;
  font-weight: 600;
  color: var(--color-primary-800);
  margin-bottom: 0.2rem;
}

.highlight-content p {
  font-size: 0.825rem;
  color: var(--text-muted);
  line-height: 1.4;
  margin-bottom: 0;
}

/* Contenedor de la Imagen del Prototipo */
.project-media {
  position: relative;
}

.prototype-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-light);
  position: relative;
  transition: transform var(--transition-normal);
}

.prototype-card:hover {
  transform: translateY(-4px);
}

.prototype-img-wrapper {
  position: relative;
  width: 100%;
  max-height: 480px;
  overflow: hidden;
  background: #000;
}

.prototype-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.prototype-card:hover .prototype-img {
  transform: scale(1.03);
}

.prototype-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: rgba(10, 33, 20, 0.85);
  backdrop-filter: blur(8px);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.prototype-caption {
  padding: 1.15rem 1.35rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-card);
  border-top: 1px solid var(--border-light);
}

.prototype-caption-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary-800);
}

.prototype-caption-desc {
  font-size: 0.775rem;
  color: var(--text-muted);
}

/* ==========================================================================
   SECCIÓN: COMPONENTES & FUNCIONAMIENTO
   ========================================================================== */
.components-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
  margin-bottom: 4rem;
}

.component-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 2rem 1.75rem;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.component-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-200);
}

.component-icon-badge {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-100);
  color: var(--color-primary-700);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.component-icon-badge.amber {
  background: var(--color-accent-light);
  color: var(--color-accent-amber);
}

.component-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-primary-800);
  margin-bottom: 0.85rem;
  line-height: 1.3;
}

.component-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.component-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: auto;
}

.component-tag {
  font-size: 0.725rem;
  font-weight: 600;
  color: var(--color-primary-600);
  background: var(--color-primary-50);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
}

/* WIDGET INTERACTIVO DE SIMULACIÓN DE ECOMURO */
.simulator-box {
  background: linear-gradient(145deg, #ffffff 0%, var(--bg-card-subtle) 100%);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-primary-200);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
}

.simulator-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.simulator-title-group h3 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--color-primary-800);
  margin-bottom: 0.35rem;
}

.simulator-title-group p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.sim-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.sim-btn {
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.5rem 1.15rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-primary-300);
  color: var(--color-primary-700);
  background: #ffffff;
  transition: all var(--transition-fast);
}

.sim-btn.active {
  background: var(--color-primary-600);
  color: #ffffff;
  border-color: var(--color-primary-600);
  box-shadow: 0 2px 8px rgba(35, 108, 71, 0.25);
}

.simulator-panels {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.sim-metric-card {
  background: #ffffff;
  border-radius: var(--radius-md);
  padding: 1.5rem;
  border: 1px solid var(--border-light);
  text-align: center;
}

.sim-metric-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.sim-metric-value {
  font-family: var(--font-mono);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-primary-700);
  margin-bottom: 0.35rem;
  transition: color var(--transition-fast);
}

.sim-metric-value.warning {
  color: #d97706;
}

.sim-metric-status {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  display: inline-block;
  background: var(--color-primary-100);
  color: var(--color-primary-700);
}

.sim-metric-status.warning {
  background: #fef3c7;
  color: #b45309;
}

/* ==========================================================================
   SECCIÓN: BENEFICIOS (DIMENSIONES DEL DESARROLLO SOSTENIBLE)
   ========================================================================== */
.benefits-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.benefit-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.benefit-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--color-primary-400);
}

.benefit-card.social::before {
  background: var(--color-accent-gold);
}

.benefit-card.economic::before {
  background: var(--color-primary-300);
}

.benefit-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.benefit-dimension-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary-600);
  margin-bottom: 0.75rem;
  display: block;
}

.benefit-card.social .benefit-dimension-tag {
  color: var(--color-accent-amber);
}

.benefit-title {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 600;
  color: var(--color-primary-800);
  margin-bottom: 1rem;
}

.benefit-question {
  font-style: italic;
  font-size: 0.925rem;
  color: var(--text-muted);
  background: var(--bg-card-subtle);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.5rem;
  border-left: 3px solid var(--color-primary-400);
}

.benefit-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.benefit-list li {
  font-size: 0.95rem;
  color: var(--text-secondary);
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  line-height: 1.5;
}

.benefit-list li svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--color-primary-500);
  margin-top: 0.2rem;
}

/* ==========================================================================
   SECCIÓN: METODOLOGÍA & RESULTADOS DE INVESTIGACIÓN
   ========================================================================== */
.hypothesis-box {
  background: var(--bg-card-warm);
  border: 1px solid var(--color-accent-border);
  border-radius: var(--radius-md);
  padding: 2rem 2.25rem;
  margin-bottom: 3rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  box-shadow: var(--shadow-sm);
}

.hypothesis-item h4 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--color-primary-800);
  margin-bottom: 0.65rem;
}

.hypothesis-item p {
  font-size: 0.975rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.hypothesis-item.problem p {
  font-style: italic;
}

.hypothesis-badge {
  display: inline-block;
  font-size: 0.725rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #78350f;
  background: #fef3c7;
  padding: 0.35rem 0.8rem;
  border-radius: var(--radius-full);
  margin-top: 1rem;
  border: 1px solid #fde68a;
}

/* 3 Tarjetas de Datos de Investigación */
.research-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.research-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 2rem 1.75rem;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.research-card-header {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 1.35rem;
}

.research-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-100);
  color: var(--color-primary-700);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.research-card-header h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--color-primary-800);
}

/* Observaciones Lista */
.observations-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.observations-list li {
  font-size: 0.885rem;
  color: var(--text-secondary);
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  line-height: 1.45;
}

.observations-list li svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--color-primary-500);
  margin-top: 0.2rem;
}

/* Barras de Progreso de Encuestas */
.survey-item {
  margin-bottom: 1.25rem;
}

.survey-label-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.survey-pct {
  font-weight: 700;
  font-family: var(--font-mono);
}

.progress-track {
  width: 100%;
  height: 9px;
  background: #e5e7eb;
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--color-primary-500);
  transition: width 1.2s ease-out;
}

.progress-fill.amber {
  background: var(--color-accent-gold);
}

.progress-fill.green-dark {
  background: var(--color-primary-700);
}

.survey-footnote {
  font-size: 0.825rem;
  color: var(--text-muted);
  line-height: 1.45;
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--border-light);
}

/* Indicadores de Impacto */
.indicator-block {
  padding: 0.9rem 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.85rem;
  background: var(--color-primary-50);
  border-left: 3px solid var(--color-primary-500);
}

.indicator-block.social {
  background: var(--bg-card-warm);
  border-left-color: var(--color-accent-gold);
}

.indicator-block.economic {
  background: var(--bg-card-subtle);
  border-left-color: var(--color-primary-300);
}

.indicator-type {
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary-700);
  margin-bottom: 0.25rem;
}

.indicator-block.social .indicator-type {
  color: var(--color-accent-amber);
}

.indicator-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

/* ==========================================================================
   SECCIÓN: GALERÍA & TRABAJO DE CAMPO
   ========================================================================== */
.gallery-filter-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.filter-btn {
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-light);
  background: #ffffff;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--color-primary-700);
  color: #ffffff;
  border-color: var(--color-primary-700);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 4rem;
}

.gallery-item {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.gallery-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.gallery-thumb-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #111;
}

.gallery-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gallery-item:hover .gallery-thumb {
  transform: scale(1.06);
}

.gallery-zoom-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 33, 20, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-fast);
  color: #ffffff;
}

.gallery-item:hover .gallery-zoom-overlay {
  opacity: 1;
}

.gallery-zoom-overlay svg {
  width: 32px;
  height: 32px;
}

.gallery-info {
  padding: 1.25rem 1.15rem;
  background: #ffffff;
  flex-grow: 1;
}

.gallery-item-title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary-800);
  margin-bottom: 0.35rem;
}

.gallery-item-desc {
  font-size: 0.825rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* Reproductor Noticiero Oficial */
.video-feature-box {
  background: linear-gradient(135deg, var(--color-primary-900) 0%, var(--color-primary-800) 100%);
  border-radius: var(--radius-lg);
  padding: 3rem;
  color: #ffffff;
  box-shadow: var(--shadow-lg);
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 2.5rem;
  align-items: center;
}

.video-info h3 {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  margin-bottom: 0.75rem;
  color: #ffffff;
}

.video-info p {
  color: var(--text-inverse-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.video-specs-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-bottom: 2rem;
}

.video-specs-list li {
  font-size: 0.85rem;
  color: var(--color-primary-100);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.video-specs-list li svg {
  width: 16px;
  height: 16px;
  color: var(--color-primary-300);
}

.video-embed-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  background: #000;
}

.video-embed-container iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* ==========================================================================
   SECCIÓN: EQUIPO BIOTEC NIETISTA
   ========================================================================== */
.team-students-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
  margin-bottom: 3.5rem;
}

.team-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 1.85rem 1.65rem;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.team-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-200);
}

.team-avatar-badge {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--color-accent-light);
  color: var(--color-accent-amber);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.team-name {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary-800);
  line-height: 1.3;
  margin-bottom: 0.35rem;
}

.team-role {
  font-size: 0.725rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent-amber);
  margin-bottom: 1rem;
  display: block;
}

.team-desc {
  font-size: 0.885rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Bloque Profesores y Alianzas */
.teachers-advisory-box {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 2.25rem;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.teachers-header {
  text-align: center;
  margin-bottom: 1.75rem;
}

.teachers-header h4 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: var(--color-primary-800);
  margin-bottom: 0.25rem;
}

.teachers-header p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.teachers-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.teacher-item {
  background: var(--bg-card-subtle);
  padding: 1.15rem 1.25rem;
  border-radius: var(--radius-sm);
  text-align: center;
}

.teacher-item h5 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-primary-800);
}

.teacher-item span {
  font-size: 0.775rem;
  color: var(--text-muted);
}

/* ==========================================================================
   SECCIÓN: SEDE E IDENTIDAD INSTITUCIONAL
   ========================================================================== */
.institutional-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.institutional-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 2rem 1.65rem;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.institutional-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-300);
}

.inst-icon-badge {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-100);
  color: var(--color-primary-700);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.institutional-card h4 {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.institutional-card h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--color-primary-800);
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.institutional-card p {
  font-size: 0.885rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-top: auto;
}

/* ==========================================================================
   SECCIÓN: CRÉDITOS DE DESARROLLO (Dairo David Marín Torres)
   ========================================================================== */
.dev-credits-section {
  background: var(--bg-card-warm);
  border-top: 1px solid var(--color-accent-border);
  border-bottom: 1px solid var(--color-accent-border);
  padding: 3.5rem 0;
  text-align: center;
}

.dev-credits-icon {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-full);
  background: var(--color-accent-light);
  color: var(--color-accent-amber);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  border: 1px solid var(--color-accent-border);
}

.dev-credits-label {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--color-primary-800);
  margin-bottom: 0.35rem;
}

.dev-credits-name {
  font-family: var(--font-serif);
  font-size: clamp(1.85rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--color-accent-amber);
  margin-bottom: 0.85rem;
}

.dev-credits-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto 1.5rem;
  line-height: 1.6;
}

.dev-credits-tags {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.dev-tag {
  font-family: var(--font-mono);
  font-size: 0.775rem;
  font-weight: 600;
  color: #78350f;
  background: #fef3c7;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  border: 1px solid #fde68a;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  background-color: var(--color-primary-950);
  color: #ffffff;
  padding: 4.5rem 0 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand-title {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 1.15rem;
}

.footer-logo-img {
  height: 48px;
  width: auto;
  max-width: 88px;
  object-fit: contain;
  background: #ffffff;
  padding: 3px 6px;
  border-radius: var(--radius-sm);
}

.footer-brand-name {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #ffffff;
}

.footer-brand-desc {
  font-size: 0.9rem;
  color: var(--text-inverse-muted);
  line-height: 1.65;
  margin-bottom: 1.35rem;
  max-width: 320px;
}

.footer-brand-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent-gold);
  background: rgba(200, 150, 62, 0.14);
  border: 1px solid rgba(200, 150, 62, 0.35);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
}

.footer-col-title {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary-200);
  margin-bottom: 1.35rem;
}

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

.footer-link {
  font-size: 0.9rem;
  color: var(--text-inverse-muted);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
  display: inline-block;
}

.footer-link:hover {
  color: #ffffff;
  padding-left: 4px;
}

.footer-info-text {
  font-size: 0.9rem;
  color: var(--text-inverse-muted);
  line-height: 1.65;
  margin-bottom: 1rem;
}

.footer-mision-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: #a7f3d0;
  background: rgba(16, 185, 129, 0.14);
  border: 1px solid rgba(16, 185, 129, 0.28);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-sm);
  margin-top: 0.5rem;
}

.footer-external-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.885rem;
  color: var(--text-inverse-muted);
  transition: color var(--transition-fast);
}

.footer-external-link:hover {
  color: #ffffff;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.825rem;
  color: rgba(255, 255, 255, 0.6);
  flex-wrap: wrap;
  gap: 1rem;
}

/* ==========================================================================
   CHATBOT CON INTELIGENCIA ARTIFICIAL (GREEN SKIN AI)
   ========================================================================== */
.chatbot-wrapper {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1500;
  font-family: var(--font-sans);
}

/* Botón flotante para abrir y cerrar */
.chatbot-toggle-btn {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  background: linear-gradient(135deg, var(--color-primary-600) 0%, var(--color-primary-800) 100%);
  color: #ffffff;
  padding: 0.85rem 1.4rem;
  border-radius: var(--radius-full);
  box-shadow: 0 8px 24px rgba(10, 33, 20, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all var(--transition-normal);
  cursor: pointer;
}

.chatbot-toggle-btn:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 30px rgba(10, 33, 20, 0.45);
  background: linear-gradient(135deg, var(--color-primary-500) 0%, var(--color-primary-700) 100%);
}

.chatbot-toggle-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chatbot-toggle-label {
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* Ventana emergente del Chat */
.chatbot-window {
  position: absolute;
  bottom: calc(100% + 16px);
  right: 0;
  width: 380px;
  max-width: calc(100vw - 32px);
  height: 540px;
  max-height: calc(100vh - 120px);
  background: #ffffff;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 50px rgba(5, 20, 11, 0.35);
  border: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(0.96);
  transition: all var(--transition-normal);
}

.chatbot-window.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

/* Cabecera del Chat */
.chatbot-header {
  background: linear-gradient(135deg, var(--color-primary-900) 0%, var(--color-primary-800) 100%);
  color: #ffffff;
  padding: 1.15rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.chatbot-header-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.chatbot-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: #ffffff;
  padding: 2px;
  object-fit: contain;
}

.chatbot-title-box h4 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.2;
}

.chatbot-status-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  color: var(--color-primary-200);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 8px #4ade80;
  display: inline-block;
}

.chatbot-close-btn {
  color: rgba(255, 255, 255, 0.8);
  padding: 0.4rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.chatbot-close-btn:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.15);
}

/* Área de Mensajes */
.chatbot-messages {
  flex: 1;
  padding: 1.25rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background: var(--bg-page);
  scroll-behavior: smooth;
}

.chat-message {
  display: flex;
  gap: 0.65rem;
  max-width: 86%;
  animation: messageFadeIn 0.3s ease-out;
}

@keyframes messageFadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.chat-message.bot {
  align-self: flex-start;
}

.chat-message.user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.chat-bubble {
  padding: 0.8rem 1.05rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  line-height: 1.5;
  word-break: break-word;
}

.chat-message.bot .chat-bubble {
  background: #ffffff;
  color: var(--text-primary);
  border: 1px solid var(--border-light);
  border-top-left-radius: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.chat-message.user .chat-bubble {
  background: var(--color-primary-600);
  color: #ffffff;
  border-top-right-radius: 4px;
}

/* Chips de Preguntas Rápidas */
.chat-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.4rem;
}

.chat-chip {
  font-size: 0.775rem;
  font-weight: 500;
  color: var(--color-primary-700);
  background: #ffffff;
  border: 1px solid var(--color-primary-200);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
}

.chat-chip:hover {
  background: var(--color-primary-100);
  border-color: var(--color-primary-400);
  color: var(--color-primary-900);
  transform: translateY(-1px);
}

/* Indicador de Escritura / Carga */
.chat-typing-bubble {
  display: none;
  align-items: center;
  gap: 0.35rem;
  padding: 0.75rem 1rem;
  background: #ffffff;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  align-self: flex-start;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.chat-typing-bubble.active {
  display: flex;
}

.typing-dot {
  width: 6px;
  height: 6px;
  background: var(--color-primary-400);
  border-radius: 50%;
  animation: typingBounce 1.4s infinite ease-in-out both;
}

.typing-dot:nth-child(1) { animation-delay: -0.32s; }
.typing-dot:nth-child(2) { animation-delay: -0.16s; }
.typing-dot:nth-child(3) { animation-delay: 0s; }

@keyframes typingBounce {
  0%, 80%, 100% { transform: scale(0); }
  40% { transform: scale(1); }
}

/* Aviso de configuración o estado */
.chat-notice {
  background: #fef9c3;
  border: 1px solid #fde047;
  color: #713f12;
  font-size: 0.8rem;
  line-height: 1.45;
  padding: 0.75rem 0.9rem;
  border-radius: var(--radius-sm);
  margin-top: 0.5rem;
}

.chat-notice strong {
  color: #854d0e;
}

/* Barra de Entrada / Input */
.chatbot-input-bar {
  padding: 0.85rem 1rem;
  background: #ffffff;
  border-top: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.chat-input {
  flex: 1;
  padding: 0.65rem 0.95rem;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  color: var(--text-primary);
  background: var(--bg-card-subtle);
  outline: none;
  transition: all var(--transition-fast);
}

.chat-input:focus {
  border-color: var(--color-primary-500);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(35, 108, 71, 0.12);
}

.chat-send-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--color-primary-600);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.chat-send-btn:hover:not(:disabled) {
  background: var(--color-primary-500);
  transform: scale(1.05);
}

.chat-send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ==========================================================================
   LIGHTBOX MODAL PARA GALERÍA
   ========================================================================== */
.lightbox-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(5, 18, 10, 0.94);
  backdrop-filter: blur(10px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.lightbox-modal.active {
  display: flex;
  opacity: 1;
}

.lightbox-content {
  position: relative;
  max-width: 900px;
  width: 100%;
  background: var(--color-primary-900);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.lightbox-close-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: rgba(0, 0, 0, 0.65);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: background-color var(--transition-fast);
}

.lightbox-close-btn:hover {
  background: rgba(0, 0, 0, 0.9);
}

.lightbox-img-box {
  width: 100%;
  max-height: 70vh;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-img-box img {
  max-height: 70vh;
  width: 100%;
  object-fit: contain;
}

.lightbox-caption-box {
  padding: 1.25rem 1.5rem;
  color: #ffffff;
  background: var(--color-primary-800);
}

.lightbox-caption-box h4 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  margin-bottom: 0.25rem;
}

.lightbox-caption-box p {
  font-size: 0.85rem;
  color: var(--text-inverse-muted);
}

/* Botón flotante para subir (ubicado a la izquierda del chatbot) */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 180px;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: rgba(10, 33, 20, 0.85);
  backdrop-filter: blur(8px);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(255, 255, 255, 0.2);
  z-index: 900;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-normal);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-primary-500);
  transform: translateY(-3px);
}

/* ==========================================================================
   RESPONSIVE DESIGN (Media Queries)
   ========================================================================== */
@media (max-width: 1100px) {
  .hero-grid {
    gap: 2.5rem;
  }

  .nav-links {
    gap: 1.15rem;
  }
}

@media (max-width: 992px) {
  :root {
    --nav-height: 70px;
  }

  .mobile-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(6, 20, 11, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 2.25rem 1.75rem;
    gap: 1.35rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-cta-btn {
    display: none;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 3rem;
  }

  .hero-text-col {
    text-align: center;
  }

  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-stats-bar {
    margin: 0 auto;
  }

  .hero-logo-card {
    max-width: 400px;
  }

  .institutional-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .components-grid,
  .benefits-cards,
  .research-grid,
  .gallery-grid,
  .team-students-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }

  .video-feature-box {
    grid-template-columns: 1fr;
    padding: 2.25rem;
  }

  .project-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 640px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .hero-stats-bar {
    grid-template-columns: 1fr;
    gap: 0.85rem;
  }

  .stat-item {
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    padding-bottom: 0.65rem;
  }

  .stat-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }

  .components-grid,
  .benefits-cards,
  .research-grid,
  .gallery-grid,
  .team-students-grid,
  .teachers-list,
  .institutional-grid {
    grid-template-columns: 1fr;
  }

  .simulator-panels {
    grid-template-columns: 1fr;
  }

  .hypothesis-box {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .project-highlights {
    grid-template-columns: 1fr;
  }

  .back-to-top {
    right: auto;
    left: 20px;
    bottom: 20px;
  }

  .chatbot-wrapper {
    right: 16px;
    bottom: 16px;
  }

  .chatbot-window {
    width: calc(100vw - 32px);
    height: 75vh;
    bottom: calc(100% + 12px);
  }

  .chatbot-toggle-label {
    display: none;
  }

  .chatbot-toggle-btn {
    padding: 0.85rem;
    border-radius: 50%;
  }
}