/* ==========================================================================
   1. Design System & CSS Custom Properties
   ========================================================================== */
:root {
  /* Paleta de Colores Inspirada en Chile y la Sostenibilidad */
  --color-bg-dark: #070d19;
  --color-bg-navy: #0d1627;
  --color-bg-card: rgba(13, 22, 39, 0.65);
  
  --color-chile-blue: #0052cc;
  --color-chile-blue-hover: #0040a3;
  --color-chile-blue-glow: rgba(0, 82, 204, 0.35);
  
  --color-chile-red: #e6223a;
  --color-chile-red-hover: #c1152a;
  --color-chile-red-glow: rgba(230, 34, 58, 0.35);
  
  --color-eco-green: #00c887;
  --color-eco-green-hover: #00a36e;
  --color-eco-green-glow: rgba(0, 200, 135, 0.3);
  
  --color-text-light: #ffffff;
  --color-text-muted: #8e9cb2;
  --color-text-dark: #1e293b;
  
  --color-glass-border: rgba(255, 255, 255, 0.08);
  --color-glass-border-hover: rgba(255, 255, 255, 0.18);
  --color-glass-shadow: rgba(0, 0, 0, 0.4);
  
  /* Tipografías y Dimensiones */
  --font-display: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  --border-radius-sm: 8px;
  --border-radius-md: 16px;
  --border-radius-lg: 24px;
  
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.2s ease;
  
  --navbar-height: 80px;
  --max-width: 1200px;
}

/* ==========================================================================
   2. Reset & Estilos Base
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--navbar-height);
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg-dark);
  color: var(--color-text-light);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

ul, ol {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Enfoque accesible por teclado (WCAG) */
a:focus-visible,
button:focus-visible,
select:focus-visible,
input:focus-visible,
textarea:focus-visible,
[tabindex="0"]:focus-visible {
  outline: 3px solid var(--color-chile-blue);
  outline-offset: 4px;
}

/* ==========================================================================
   3. Estructuras Comunes & Utilidades
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 100px 0;
  position: relative;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.section-tag {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-eco-green);
  letter-spacing: 2px;
  text-transform: uppercase;
  display: block;
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-text-light);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.title-bar {
  width: 70px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-chile-blue), var(--color-chile-red));
  margin: 0 auto 20px;
  border-radius: 2px;
}

.section-subtitle {
  color: var(--color-text-muted);
  font-size: 1.1rem;
}

/* Botones Premium */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--border-radius-sm);
  transition: var(--transition-smooth);
  cursor: pointer;
  border: none;
  outline: none;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background-color: var(--color-chile-blue);
  color: #ffffff;
  box-shadow: 0 4px 20px var(--color-chile-blue-glow);
}

.btn-primary::after {
  content: '';
  position: absolute;
  top: 0;
  left: -50%;
  width: 200%;
  height: 100%;
  background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.15), transparent);
  transform: skewX(-25deg);
  transition: 0.75s ease-in-out;
}

.btn-primary:hover::after {
  left: 125%;
}

.btn-primary:hover {
  background-color: var(--color-chile-blue-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--color-chile-blue-glow);
}

.btn-secondary {
  background-color: transparent;
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  border-color: #ffffff;
  background-color: rgba(255, 255, 255, 0.05);
  transform: translateY(-2px);
}

/* ==========================================================================
   4. Navbar & Menú Mobile
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--navbar-height);
  background-color: rgba(7, 13, 25, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-glass-border);
  z-index: 1000;
  transition: var(--transition-smooth);
}

.navbar.scrolled {
  height: 70px;
  background-color: rgba(7, 13, 25, 0.95);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-svg {
  width: 42px;
  height: 42px;
  filter: drop-shadow(0 0 6px var(--color-chile-blue-glow));
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.logo-text .accent-text {
  color: var(--color-chile-blue);
}

/* Botón Hamburguesa */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 1001;
}

.menu-toggle .bar {
  width: 100%;
  height: 3px;
  background-color: var(--color-text-light);
  border-radius: 2px;
  transition: var(--transition-fast);
}

.nav-menu ul {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--color-text-light);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-chile-blue), var(--color-eco-green));
  transition: var(--transition-fast);
}

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

.nav-btn {
  background-color: rgba(0, 82, 204, 0.12);
  border: 1px solid var(--color-chile-blue);
  padding: 8px 22px !important;
  border-radius: var(--border-radius-sm);
  color: var(--color-text-light) !important;
}

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

.nav-btn:hover {
  background-color: var(--color-chile-blue);
  box-shadow: 0 4px 15px var(--color-chile-blue-glow);
}

/* ==========================================================================
   5. Hero Section
   ========================================================================== */
.hero-section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 140px 0 100px;
  background-image: url('assets/hero_train.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero-bg-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    to bottom,
    rgba(7, 13, 25, 0.65) 0%,
    rgba(7, 13, 25, 0.85) 60%,
    var(--color-bg-dark) 100%
  );
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 850px;
  margin: 0 auto;
  text-align: center;
  padding: 0 24px;
}

.hero-badge {
  display: inline-block;
  background-color: rgba(0, 200, 135, 0.1);
  border: 1px solid rgba(0, 200, 135, 0.3);
  padding: 6px 18px;
  border-radius: 30px;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--color-eco-green);
  margin-bottom: 24px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.1;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #ffffff 50%, var(--color-text-muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,0.4));
}

.hero-subtitle {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--color-eco-green);
  margin-bottom: 24px;
  letter-spacing: 0.5px;
}

.hero-description {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 680px;
  margin: 0 auto 40px;
}

.hero-ctas {
  display: flex;
  justify-content: center;
  gap: 18px;
}

/* Hero Stats */
.hero-stats-container {
  position: relative;
  z-index: 2;
  max-width: var(--max-width);
  margin: 80px auto 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding: 0 24px;
}

.hero-stat-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-glass-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 32px 24px;
  border-radius: var(--border-radius-md);
  text-align: center;
  box-shadow: 0 15px 35px var(--color-glass-shadow);
  transition: var(--transition-smooth);
}

.hero-stat-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-glass-border-hover);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6), 0 0 15px rgba(0, 82, 204, 0.1);
}

.stat-icon {
  width: 48px;
  height: 48px;
  background-color: rgba(0, 82, 204, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  color: var(--color-chile-blue);
}

.hero-stat-card:nth-child(2) .stat-icon {
  background-color: rgba(0, 200, 135, 0.1);
  color: var(--color-eco-green);
}

.hero-stat-card:nth-child(3) .stat-icon {
  background-color: rgba(230, 34, 58, 0.1);
  color: var(--color-chile-red);
}

.stat-icon svg {
  width: 24px;
  height: 24px;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   6. Sobre el Proyecto (Section & Tabs)
   ========================================================================== */
.project-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
}

.project-text h3 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  margin-bottom: 20px;
}

.project-text p {
  color: var(--color-text-muted);
  margin-bottom: 30px;
}

.project-highlights {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.highlight-item {
  display: flex;
  gap: 16px;
}

.highlight-bullet {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: rgba(0, 82, 204, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-chile-blue);
  flex-shrink: 0;
}

.project-tabs-container {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-glass-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--border-radius-md);
  padding: 36px;
  box-shadow: 0 15px 35px var(--color-glass-shadow);
}

.tabs-nav {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 16px;
  margin-bottom: 24px;
}

.tab-btn {
  background: transparent;
  border: none;
  outline: none;
  color: var(--color-text-muted);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  padding: 8px 18px;
  border-radius: var(--border-radius-sm);
  transition: var(--transition-fast);
}

.tab-btn:hover {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.04);
}

.tab-btn.active {
  color: #ffffff;
  background-color: var(--color-chile-blue);
  box-shadow: 0 4px 15px var(--color-chile-blue-glow);
}

.tab-content {
  display: none;
  animation: fadeIn 0.4s ease-out forwards;
}

.tab-content.active {
  display: block;
}

.tab-content h4 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  margin-bottom: 12px;
  color: #ffffff;
}

.tab-content p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 20px;
}

.tab-illustration {
  margin-top: 20px;
}

.tab-svg {
  width: 100%;
  height: 80px;
}

.values-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.values-list li {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  position: relative;
  padding-left: 20px;
}

.values-list li::before {
  content: '▪';
  color: var(--color-chile-red);
  position: absolute;
  left: 0;
  top: -1px;
  font-size: 1.1rem;
}

/* ==========================================================================
   7. Innovación y Tecnología (Tech Cards)
   ========================================================================== */
.tech-section {
  background: linear-gradient(180deg, var(--color-bg-dark) 0%, rgba(13, 22, 39, 0.3) 100%);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.tech-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: 0 15px 35px var(--color-glass-shadow);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.tech-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-glass-border-hover);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.55);
}

.tech-visual-container {
  background-color: rgba(7, 13, 25, 0.4);
  padding: 16px;
  border-bottom: 1px solid var(--color-glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
}

.tech-svg {
  width: 100%;
  height: auto;
  transition: var(--transition-smooth);
}

.tech-card:hover .tech-svg {
  transform: scale(1.03);
}

.tech-info {
  padding: 32px 28px;
  position: relative;
  flex-grow: 1;
}

.tech-icon-badge {
  position: absolute;
  top: -24px;
  right: 28px;
  width: 48px;
  height: 48px;
  background-color: var(--color-chile-blue);
  border: 3px solid var(--color-bg-navy);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.tech-card:nth-child(2) .tech-icon-badge {
  background-color: var(--color-chile-red);
}

.tech-card:nth-child(3) .tech-icon-badge {
  background-color: var(--color-eco-green);
}

.tech-icon-badge svg {
  width: 20px;
  height: 20px;
}

.tech-info h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin-bottom: 12px;
  color: #ffffff;
}

.tech-info p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ==========================================================================
   8. Impacto y Sostenibilidad
   ========================================================================== */
.sus-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
}

.sus-content h3 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  margin-bottom: 20px;
}

.sus-content p {
  color: var(--color-text-muted);
  margin-bottom: 36px;
}

.certifications-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.cert-card {
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.05);
  padding: 24px;
  border-radius: var(--border-radius-sm);
  display: flex;
  gap: 16px;
}

.cert-icon {
  flex-shrink: 0;
  display: flex;
  align-items: flex-start;
}

.cert-text strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: #ffffff;
  margin-bottom: 6px;
}

.cert-text p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 0;
  line-height: 1.4;
}

.sus-graphic-card {
  display: flex;
  align-items: center;
  justify-content: center;
}

.eco-circle-container {
  position: relative;
  width: 260px;
  height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.eco-svg {
  width: 100%;
  height: 100%;
  animation: float 6s ease-in-out infinite;
}

.eco-stat-overlay {
  position: absolute;
  text-align: center;
}

.eco-num {
  display: block;
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1;
}

.eco-lbl {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-text-muted);
}

/* ==========================================================================
   9. Noticias e Hitos (Timeline)
   ========================================================================== */
.timeline-container {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  padding: 40px 0;
}

/* Línea Central */
.timeline-container::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 4px;
  background-color: var(--color-bg-navy);
  transform: translateX(-50%);
  border-radius: 2px;
}

.timeline-card {
  position: relative;
  width: 50%;
  padding: 0 40px 40px 40px;
  box-sizing: border-box;
}

.timeline-card:nth-child(odd) {
  left: 0;
  text-align: right;
}

.timeline-card:nth-child(even) {
  left: 50%;
  text-align: left;
}

/* Insignias de la Línea de Tiempo */
.timeline-badge {
  position: absolute;
  top: 0;
  width: 40px;
  height: 40px;
  background-color: var(--color-bg-navy);
  border: 4px solid var(--color-bg-dark);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-text-muted);
  z-index: 1;
  transition: var(--transition-smooth);
}

.timeline-card:nth-child(odd) .timeline-badge {
  right: -20px;
}

.timeline-card:nth-child(even) .timeline-badge {
  left: -20px;
}

/* Estilos de hito completado o activo */
.timeline-card.done .timeline-badge {
  background-color: var(--color-chile-blue);
  color: #ffffff;
  box-shadow: 0 0 12px var(--color-chile-blue-glow);
}

.timeline-card.active-step .timeline-badge {
  background-color: var(--color-eco-green);
  color: #ffffff;
  box-shadow: 0 0 15px var(--color-eco-green-glow);
}

/* Pulso animado para el paso activo */
.timeline-badge-pulse {
  position: absolute;
  top: -8px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: rgba(0, 200, 135, 0.15);
  animation: pulseNode 2.5s infinite ease-out;
  z-index: 0;
}

.timeline-card:nth-child(odd) .timeline-badge-pulse {
  right: -28px;
}

.timeline-card:nth-child(even) .timeline-badge-pulse {
  left: -28px;
}

/* Contenido de la tarjeta */
.timeline-content {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-glass-border);
  padding: 28px;
  border-radius: var(--border-radius-md);
  box-shadow: 0 10px 25px var(--color-glass-shadow);
  transition: var(--transition-smooth);
}

.timeline-card:hover .timeline-content {
  border-color: var(--color-glass-border-hover);
  transform: translateY(-4px);
}

.timeline-date {
  display: block;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-chile-red);
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.timeline-card.active-step .timeline-date {
  color: var(--color-eco-green);
}

.timeline-content h4 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: #ffffff;
}

.timeline-content p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* ==========================================================================
   10. Mapa de Recorrido & Panel de Detalles
   ========================================================================== */
.route-layout {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 40px;
  align-items: stretch;
}

.map-container {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-glass-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--border-radius-md);
  padding: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 15px 35px var(--color-glass-shadow);
}

.interactive-map-svg {
  width: 100%;
  height: auto;
  max-height: 420px;
}

/* Estilos Nodos Interactivos */
.map-station-node {
  cursor: pointer;
  outline: none;
  transition: var(--transition-smooth);
}

.station-pulse {
  opacity: 0;
  transform-origin: center;
  transform: scale(0.6);
  transition: var(--transition-smooth);
}

.map-station-node:hover .station-pulse,
.map-station-node.active .station-pulse {
  animation: pulseNode 2s infinite ease-out;
}

.station-dot {
  transition: var(--transition-fast);
}

.map-station-node:hover .station-dot,
.map-station-node.active .station-dot {
  r: 10px;
  fill: #ffffff;
  stroke-width: 3.5px;
  filter: drop-shadow(0 0 8px currentColor);
}

.map-station-node[data-station="valparaiso"]:hover .station-dot,
.map-station-node[data-station="valparaiso"].active .station-dot,
.map-station-node[data-station="vina"]:hover .station-dot,
.map-station-node[data-station="vina"].active .station-dot {
  stroke: var(--color-chile-red);
}

.map-station-node[data-station="casablanca"]:hover .station-dot,
.map-station-node[data-station="casablanca"].active .station-dot {
  stroke: var(--color-eco-green);
}

.map-station-node[data-station="santiago"]:hover .station-dot,
.map-station-node[data-station="santiago"].active .station-dot {
  stroke: var(--color-chile-blue);
}

.station-label {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  fill: var(--color-text-muted);
  transition: var(--transition-fast);
  pointer-events: none;
}

.map-station-node:hover .station-label,
.map-station-node.active .station-label {
  fill: #ffffff;
  font-weight: 700;
}

.station-label.text-bold {
  fill: rgba(255, 255, 255, 0.9);
}

/* Panel de Información de la Estación */
.station-info-panel {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-glass-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--border-radius-md);
  padding: 36px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 400px;
  box-shadow: 0 15px 35px var(--color-glass-shadow);
  transition: var(--transition-smooth);
}

.station-info-panel.active-panel {
  border-color: var(--color-glass-border-hover);
  box-shadow: 0 20px 40px rgba(0, 82, 204, 0.08);
}

.panel-placeholder {
  text-align: center;
  color: var(--color-text-muted);
}

.placeholder-icon {
  width: 44px;
  height: 44px;
  margin-bottom: 16px;
  color: var(--color-chile-blue);
  opacity: 0.7;
}

.panel-content {
  animation: slideInPanel 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.panel-content.hidden {
  display: none;
}

.station-header-info {
  margin-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 16px;
}

.station-badge {
  display: inline-block;
  background-color: rgba(0, 82, 204, 0.12);
  border: 1px solid rgba(0, 82, 204, 0.25);
  color: #38bdf8;
  padding: 4px 12px;
  border-radius: 20px;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 10px;
}

.station-title-text {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 800;
  color: #ffffff;
}

.station-details-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.detail-card {
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.04);
  padding: 16px;
  border-radius: var(--border-radius-sm);
}

.detail-title {
  display: block;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.detail-value {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-eco-green);
}

.info-subheader {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: #ffffff;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.station-description {
  margin-bottom: 24px;
}

.station-description p,
.station-attractions p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

/* ==========================================================================
   11. Calculadora de Viaje Sostenible
   ========================================================================== */
.calculator-layout {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 40px;
  align-items: stretch;
}

.calc-input-panel {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-glass-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--border-radius-md);
  padding: 40px;
  box-shadow: 0 15px 35px var(--color-glass-shadow);
  display: flex;
  flex-direction: column;
}

.calc-input-panel h3 {
  font-family: var(--font-display);
  font-size: 1.45rem;
  margin-bottom: 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 12px;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-light);
  margin-bottom: 8px;
}

.calc-select {
  width: 100%;
  padding: 14px 16px;
  background-color: rgba(7, 13, 25, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--border-radius-sm);
  color: #ffffff;
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  cursor: pointer;
  transition: var(--transition-fast);
}

.calc-select:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

.calc-select:focus {
  border-color: var(--color-chile-blue);
  box-shadow: 0 0 0 3px var(--color-chile-blue-glow);
}

.calc-select option {
  background-color: var(--color-bg-navy);
}

.calc-illustration {
  margin-top: auto;
  display: flex;
  justify-content: center;
  opacity: 0.85;
}

.carbon-tree-svg {
  width: 180px;
  height: auto;
}

/* Panel de Resultados */
.results-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  height: 100%;
}

.result-box {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--border-radius-md);
  padding: 28px;
  box-shadow: 0 15px 35px var(--color-glass-shadow);
  display: flex;
  flex-direction: column;
}

.result-header {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-eco-green);
  margin-bottom: 16px;
}

.result-box:nth-child(2) .result-header {
  color: var(--color-chile-blue);
}

.res-icon {
  width: 22px;
  height: 22px;
}

.result-header h4 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.result-value {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
  line-height: 1.1;
}

.result-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.highlight-text-light {
  color: var(--color-eco-green);
  font-weight: 700;
}

/* Caja de comparación */
.comparison-box {
  grid-column: span 2;
  display: flex;
  flex-direction: column;
}

.comparison-box h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin-bottom: 20px;
}

.bar-chart-container {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 20px;
}

.bar-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.bar-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.bar-wrapper {
  position: relative;
  height: 28px;
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--border-radius-sm);
  overflow: hidden;
  display: flex;
  align-items: center;
}

.bar-fill {
  height: 100%;
  border-radius: var(--border-radius-sm) 0 0 var(--border-radius-sm);
  transition: width 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.car-fill {
  background: linear-gradient(90deg, var(--color-chile-red), #b91526);
}

.rail-fill {
  background: linear-gradient(90deg, var(--color-chile-blue), var(--color-eco-green));
}

.bar-value {
  position: absolute;
  right: 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  color: #ffffff;
}

.savings-note {
  margin-top: auto;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.savings-note strong {
  color: var(--color-eco-green);
}

/* ==========================================================================
   12. Sección de Contacto y Formulario
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 40px;
}

.contact-info-column {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-glass-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--border-radius-md);
  padding: 40px;
  box-shadow: 0 15px 35px var(--color-glass-shadow);
}

.info-block {
  margin-bottom: 36px;
}

.info-block h3 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  margin-bottom: 12px;
}

.info-block p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.info-detail {
  display: flex;
  gap: 20px;
  margin-bottom: 28px;
}

.info-detail:last-child {
  margin-bottom: 0;
}

.detail-icon {
  width: 44px;
  height: 44px;
  background-color: rgba(230, 34, 58, 0.08);
  border: 1px solid rgba(230, 34, 58, 0.15);
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-chile-red);
  flex-shrink: 0;
}

.info-detail strong {
  display: block;
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: #ffffff;
  margin-bottom: 4px;
}

.info-detail p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* Formulario */
.contact-form-column {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-glass-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--border-radius-md);
  padding: 40px;
  box-shadow: 0 15px 35px var(--color-glass-shadow);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-field label {
  font-size: 0.85rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
}

.form-field input,
.form-field select,
.form-field textarea {
  padding: 14px 16px;
  background-color: rgba(7, 13, 25, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--border-radius-sm);
  color: #ffffff;
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition-fast);
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: rgba(255, 255, 255, 0.25);
}

.form-field input:hover,
.form-field select:hover,
.form-field textarea:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--color-chile-blue);
  box-shadow: 0 0 0 3px var(--color-chile-blue-glow);
}

.form-field input.invalid,
.form-field select.invalid,
.form-field textarea.invalid {
  border-color: var(--color-chile-red);
}

.form-field input.invalid:focus,
.form-field select.invalid:focus,
.form-field textarea.invalid:focus {
  box-shadow: 0 0 0 3px var(--color-chile-red-glow);
}

.error-msg {
  font-size: 0.75rem;
  color: var(--color-chile-red);
  min-height: 16px;
  margin-top: 2px;
}

.btn-submit {
  align-self: flex-start;
  gap: 10px;
  background-color: var(--color-chile-blue);
  color: #ffffff;
  padding: 14px 32px;
  border-radius: var(--border-radius-sm);
}

.btn-submit:hover {
  background-color: var(--color-chile-blue-hover);
}

.btn-arrow {
  width: 18px;
  height: 18px;
  transition: transform 0.3s ease;
}

.btn-submit:hover .btn-arrow {
  transform: translateX(4px);
}

.btn-arrow.hidden {
  display: none;
}

/* Feedback del Formulario */
.form-feedback {
  padding: 14px 18px;
  border-radius: var(--border-radius-sm);
  font-size: 0.9rem;
  margin-top: 10px;
  animation: fadeIn 0.4s ease forwards;
}

.form-feedback.success {
  background-color: rgba(0, 200, 135, 0.1);
  border: 1px solid rgba(0, 200, 135, 0.3);
  color: #a7f3d0;
}

.form-feedback.error {
  background-color: rgba(230, 34, 58, 0.1);
  border: 1px solid rgba(230, 34, 58, 0.3);
  color: #fca5a5;
}

.form-feedback.hidden {
  display: none;
}

/* ==========================================================================
   13. Footer
   ========================================================================== */
.main-footer {
  background-color: #040912;
  padding: 80px 0 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 50px;
}

.logo-svg-footer {
  width: 36px;
  height: 36px;
  filter: drop-shadow(0 0 4px var(--color-chile-blue-glow));
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.footer-logo .logo-text {
  font-size: 1.2rem;
}

.footer-desc {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  max-width: 440px;
}

.footer-links h4,
.footer-socials h4 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  margin-bottom: 22px;
  position: relative;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

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

.social-icons {
  display: flex;
  gap: 14px;
}

.social-icons a {
  width: 42px;
  height: 42px;
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  transition: var(--transition-fast);
}

.social-icons a:hover {
  background-color: var(--color-chile-blue);
  color: #ffffff;
  border-color: var(--color-chile-blue);
  box-shadow: 0 0 10px var(--color-chile-blue-glow);
  transform: translateY(-2px);
}

.social-icons svg {
  width: 18px;
  height: 18px;
}

.footer-bottom {
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 30px;
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.3);
  font-size: 0.8rem;
}

/* ==========================================================================
   14. Animaciones y Transiciones Keyframes
   ========================================================================== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulseNode {
  0% {
    transform: scale(0.7);
    opacity: 0.9;
  }
  100% {
    transform: scale(2.4);
    opacity: 0;
  }
}

@keyframes slideInPanel {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.animate-fade-in {
  animation: fadeIn 1s ease-out forwards;
}

.animate-fade-in-up {
  animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.animate-fade-in-up-delay {
  opacity: 0;
  animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.2s forwards;
}

.animate-fade-in-up-more {
  opacity: 0;
  animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.4s forwards;
}

/* ==========================================================================
   15. Medias Queries (Responsividad)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 3.2rem;
  }
  
  .project-grid,
  .route-layout,
  .calculator-layout,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .tech-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .sus-layout {
    grid-template-columns: 1fr;
    gap: 50px;
  }
  
  .sus-graphic-card {
    order: -1;
  }
}

@media (max-width: 768px) {
  :root {
    --navbar-height: 70px;
  }
  
  section {
    padding: 70px 0;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  /* Menú de Navegación Móvil */
  .nav-menu {
    position: absolute;
    top: var(--navbar-height);
    left: -100%;
    width: 100%;
    height: calc(100vh - var(--navbar-height));
    background-color: var(--color-bg-dark);
    border-top: 1px solid var(--color-glass-border);
    transition: var(--transition-smooth);
    overflow-y: auto;
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-menu ul {
    flex-direction: column;
    padding: 40px 24px;
    gap: 24px;
    align-items: stretch;
  }
  
  .nav-link {
    display: block;
    font-size: 1.15rem;
    padding: 10px 0;
  }
  
  .nav-btn {
    text-align: center;
    margin-top: 12px;
  }
  
  .menu-toggle.active .bar:nth-child(1) {
    transform: translateY(8.5px) rotate(45deg);
  }
  
  .menu-toggle.active .bar:nth-child(2) {
    opacity: 0;
  }
  
  .menu-toggle.active .bar:nth-child(3) {
    transform: translateY(-8.5px) rotate(-45deg);
  }
  
  /* Hero & Stats */
  .hero-section {
    padding: 120px 0 60px;
  }
  
  .hero-title {
    font-size: 2.4rem;
  }
  
  .hero-subtitle {
    font-size: 1.3rem;
  }
  
  .hero-ctas {
    flex-direction: column;
    gap: 12px;
  }
  
  .hero-stats-container {
    grid-template-columns: 1fr;
    margin-top: 50px;
  }
  
  /* Timeline */
  .timeline-container::before {
    left: 20px;
  }
  
  .timeline-card {
    width: 100%;
    padding: 0 0 32px 40px;
  }
  
  .timeline-card:nth-child(odd) {
    text-align: left;
  }
  
  .timeline-card:nth-child(odd) .timeline-badge {
    left: 0px;
    right: auto;
  }
  
  .timeline-card:nth-child(even) .timeline-badge {
    left: 0px;
  }
  
  .timeline-card:nth-child(odd) .timeline-badge-pulse {
    left: -8px;
    right: auto;
  }
  
  .timeline-card:nth-child(even) .timeline-badge-pulse {
    left: -8px;
  }
  
  .timeline-card:nth-child(even) {
    left: 0;
  }
  
  /* Calculator & Cards */
  .tech-grid {
    grid-template-columns: 1fr;
  }
  
  .results-grid {
    grid-template-columns: 1fr;
  }
  
  .comparison-box {
    grid-column: 1;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .footer-top {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}