/* ========================================
   HUELLAS DE ACERO - ESTILOS
   Landing Page Estática
   ======================================== */

/* === VARIABLES CSS === */
:root {
  /* Colores principales */
  --color-primary: #2D5016;
  --color-primary-light: #4A7C2C;
  --color-secondary: #5A6A72;
  --color-secondary-light: #8B9DA9;
  --color-dark: #2C3539;
  --color-light: #F8F9FA;
  --color-white: #FFFFFF;
  
  /* Gradientes */
  --gradient-overlay: linear-gradient(135deg, rgba(45, 80, 22, 0.85), rgba(90, 106, 114, 0.75));
  --gradient-hero: linear-gradient(to bottom, rgba(0, 0, 0, 0.4), rgba(45, 80, 22, 0.6));
  
  /* Espaciado */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  
  /* Tipografía */
  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Open Sans', sans-serif;
  
  /* Sombras */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
  
  /* Transiciones */
  --transition-base: 0.3s ease;
  --transition-slow: 0.6s ease;
}

/* === RESET BÁSICO === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-dark);
  background-color: var(--color-light);
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

/* === TIPOGRAFÍA === */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
  color: var(--color-dark);
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
  margin-bottom: var(--spacing-sm);
}

/* === UTILIDADES === */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-xl) 0;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.section.visible {
  opacity: 1;
  transform: translateY(0);
}

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

.section-title {
  margin-bottom: var(--spacing-lg);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: var(--gradient-overlay);
  border-radius: 2px;
}

/* === HEADER & NAVEGACIÓN === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-base);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) 0;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-menu {
  display: flex;
  gap: var(--spacing-md);
}

.nav-link {
  font-weight: 500;
  color: var(--color-dark);
  position: relative;
  padding: 0.5rem 0;
}

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

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

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

/* Menú móvil */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 5px;
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: var(--transition-base);
}

/* === HERO SECTION === */
.hero {
  height: 100vh;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.3), rgba(45, 80, 22, 0.5)),
              url('https://images.unsplash.com/photo-1506905925346-21bda4d32df4?w=1920&q=80') center/cover no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-hero);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  padding: var(--spacing-md);
  animation: fadeInUp 1s ease;
}

.hero-title {
  color: var(--color-white);
  margin-bottom: var(--spacing-sm);
  text-shadow: 2px 4px 8px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
  font-size: clamp(1.2rem, 2.5vw, 1.8rem);
  font-weight: 300;
  margin-bottom: var(--spacing-md);
  text-shadow: 1px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  animation: bounce 2s infinite;
}

.hero-scroll svg {
  width: 30px;
  height: 30px;
  fill: var(--color-white);
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

/* === SECCIONES DE CONTENIDO === */
.about {
  background: var(--color-white);
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.1rem;
  line-height: 1.8;
}

.historia {
  background: var(--color-light);
}

.historia-content {
  max-width: 900px;
  margin: 0 auto;
}

.historia-text {
  font-size: 1.05rem;
  line-height: 1.9;
  margin-bottom: var(--spacing-md);
  text-align: justify;
}

/* === CUMBRES (GRID) === */
.cumbres {
  background: var(--color-white);
}

.cumbres-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.cumbre-card {
  background: var(--color-light);
  border-radius: 12px;
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.cumbre-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-primary-light));
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform var(--transition-base);
}

.cumbre-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.cumbre-card:hover::before {
  transform: scaleY(1);
  transform-origin: top;
}

.cumbre-sector {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--color-secondary);
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-xs);
}

.cumbre-nombre {
  font-size: 1.4rem;
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
}

.cumbre-icon {
  font-size: 2rem;
  margin-bottom: var(--spacing-sm);
  opacity: 0.3;
}

/* === IMPACTO (STATS) === */
.impacto {
  background: var(--gradient-overlay);
  color: var(--color-white);
}

.impacto .section-title {
  color: var(--color-white);
}

.impacto .section-title::after {
  background: var(--color-white);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.stat-card {
  text-align: center;
  padding: var(--spacing-md);
}

.stat-number {
  font-family: var(--font-heading);
  font-size: clamp(3rem, 5vw, 5rem);
  font-weight: 700;
  display: block;
  margin-bottom: var(--spacing-xs);
  line-height: 1;
}

.stat-label {
  font-size: 1.1rem;
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* === GALERÍA === */
.galeria {
  background: var(--color-light);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.gallery-item {
  position: relative;
  aspect-ratio: 4/3;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  cursor: pointer;
}

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

.gallery-item:hover img {
  transform: scale(1.1);
}

.gallery-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
  display: flex;
  align-items: flex-end;
  padding: var(--spacing-md);
}

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

.gallery-caption {
  color: var(--color-white);
  font-weight: 600;
}

/* === COMUNIDAD === */
.comunidad {
  background: var(--color-white);
}

.comunidad-content {
  max-width: 900px;
  margin: 0 auto;
}

.vision-box {
  background: var(--color-light);
  padding: var(--spacing-lg);
  border-radius: 12px;
  margin: var(--spacing-lg) 0;
  border-left: 4px solid var(--color-primary);
}

.vision-box h3 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.fundadores {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.fundador {
  text-align: center;
  padding: var(--spacing-md);
  background: var(--color-light);
  border-radius: 12px;
  transition: transform var(--transition-base);
}

.fundador:hover {
  transform: translateY(-5px);
}

.fundador-nombre {
  font-weight: 600;
  color: var(--color-primary);
  margin-top: var(--spacing-sm);
}

/* === CONTACTO === */
.contacto {
  background: var(--color-light);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}

.contact-item {
  background: var(--color-white);
  padding: var(--spacing-md);
  border-radius: 12px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.contact-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto var(--spacing-sm);
  background: var(--gradient-overlay);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 1.8rem;
}

.contact-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-xs);
}

.contact-value {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
  word-break: break-word;
}

.contact-item a {
  color: var(--color-primary);
}

.contact-item a:hover {
  color: var(--color-primary-light);
}

/* === FOOTER === */
.footer {
  background: var(--color-dark);
  color: var(--color-light);
  padding: var(--spacing-lg) 0;
  text-align: center;
}

.footer-content {
  max-width: 800px;
  margin: 0 auto;
}

.footer-text {
  font-size: 0.95rem;
  line-height: 1.6;
  opacity: 0.9;
}

.footer-domain {
  color: var(--color-primary-light);
  font-weight: 600;
  margin-top: var(--spacing-sm);
  display: block;
}

/* === ANIMACIONES === */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(-10px);
  }
  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  :root {
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
  }
  
  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    padding: var(--spacing-md);
    gap: var(--spacing-sm);
    transition: left var(--transition-base);
    box-shadow: var(--shadow-lg);
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }
  
  .hero {
    height: 80vh;
  }
  
  .cumbres-grid,
  .gallery-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .historia-text {
    text-align: left;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .section {
    padding: var(--spacing-lg) 0;
  }
}