/* ========================================
   EcoClima Educa - Estilos Modernos
   ======================================== */

/* Variables CSS */
:root {
  /* Colores principales - Identidad EcoClima */
  --color-primary: #4CAF50;
  --color-primary-dark: #388E3C;
  --color-primary-light: #81C784;
  --color-secondary: #1976D2;
  --color-secondary-dark: #1565C0;
  --color-secondary-light: #64B5F6;
  
  /* Colores de alerta para especies */
  --color-critical: #D32F2F;
  --color-danger: #F57C00;
  --color-vulnerable: #FBC02D;
  
  /* Colores de texto */
  --color-text: #2C3E50;
  --color-text-light: #5A6C7D;
  --color-text-white: #FFFFFF;
  
  /* Colores de fondo */
  --color-bg: #FFFFFF;
  --color-bg-light: #F8F9FA;
  --color-bg-dark: #2C3E50;
  --color-overlay: rgba(0, 0, 0, 0.5);
  
  /* Tipografía */
  --font-primary: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  /* Espaciado */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;
  
  /* Bordes y sombras */
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --border-radius-lg: 16px;
  --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --box-shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
  --box-shadow-hover: 0 8px 15px rgba(0, 0, 0, 0.2);
  
  /* Transiciones */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-primary);
  color: var(--color-text);
  line-height: 1.6;
  background-color: var(--color-bg);
  overflow-x: hidden;
}

/* 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-text);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
}

p {
  margin-bottom: var(--spacing-sm);
  font-size: 1.05rem;
  line-height: 1.7;
}

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

a:hover {
  color: var(--color-secondary-dark);
}

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

/* Contenedor */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-fluid {
  width: 100%;
  padding: 0 var(--spacing-md);
}

/* Header Moderno */
.header {
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: var(--transition);
}

.header-top {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  color: white;
  padding: var(--spacing-xs) 0;
  font-size: 0.9rem;
}

.contact-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.contact-info a {
  color: white;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition-fast);
}

.contact-info a:hover {
  opacity: 0.8;
  transform: translateY(-2px);
}

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

.logo img {
  height: 60px;
  width: auto;
  transition: var(--transition);
}

.logo img:hover {
  transform: scale(1.05);
}

/* Navegación Moderna */
.nav-main {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: var(--spacing-xs);
  margin: 0;
  padding: 0;
}

.nav-link {
  padding: var(--spacing-xs) var(--spacing-sm);
  color: var(--color-text);
  font-weight: 500;
  border-radius: var(--border-radius-sm);
  transition: var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 3px;
  background: var(--color-primary);
  transition: var(--transition);
  transform: translateX(-50%);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  background: rgba(76, 175, 80, 0.1);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 80%;
}

/* Botón menú móvil */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-text);
  cursor: pointer;
  padding: var(--spacing-xs);
  transition: var(--transition);
}

.mobile-menu-btn:hover {
  color: var(--color-primary);
  transform: scale(1.1);
}

/* Hero Section Moderno */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary-dark));
}

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

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(56, 142, 60, 0.8), rgba(21, 101, 192, 0.7));
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  color: white;
  max-width: 900px;
  padding: var(--spacing-xl) var(--spacing-md);
  animation: fadeInUp 1s ease-out;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  text-shadow: 2px 4px 8px rgba(0, 0, 0, 0.3);
  line-height: 1.1;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  margin-bottom: var(--spacing-xl);
  opacity: 0.95;
  font-weight: 300;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Botones Modernos */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  font-size: 1.05rem;
  font-weight: 600;
  border-radius: var(--border-radius);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  font-family: var(--font-heading);
  box-shadow: var(--box-shadow);
}

.btn-primary {
  background: var(--color-primary);
  color: white;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-3px);
  box-shadow: var(--box-shadow-hover);
}

.btn-secondary {
  background: transparent;
  color: white;
  border: 2px solid white;
}

.btn-secondary:hover {
  background: white;
  color: var(--color-primary);
  transform: translateY(-3px);
}

.btn-outline-light {
  background: transparent;
  color: white;
  border: 2px solid white;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
}

.btn-outline-light:hover {
  background: white;
  color: var(--color-primary);
}

/* Secciones */
.section {
  padding: var(--spacing-xxl) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-sm);
  position: relative;
  padding-bottom: var(--spacing-sm);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: 2px;
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-light);
  font-size: 1.15rem;
  max-width: 700px;
  margin: 0 auto var(--spacing-xl);
}

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

.bg-dark {
  background-color: var(--color-bg-dark);
  color: white;
}

.bg-dark .section-title,
.bg-dark h2,
.bg-dark h3 {
  color: white;
}

/* Grid de Tarjetas */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.card {
  background: white;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: var(--box-shadow-hover);
}

.card-image {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.card-content {
  padding: var(--spacing-md);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-title {
  font-size: 1.35rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.card-text {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
  flex: 1;
}

.card-footer {
  padding-top: var(--spacing-sm);
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Contadores Animados */
.stats-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.stat-box {
  text-align: center;
  padding: var(--spacing-lg);
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  transition: var(--transition);
}

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

.stat-number {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  color: var(--color-primary);
  font-family: var(--font-heading);
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: 1.1rem;
  color: var(--color-text-light);
  font-weight: 500;
}

.stat-icon {
  font-size: 3rem;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
  opacity: 0.8;
}

/* Tags de Categoría */
.tag {
  display: inline-block;
  padding: 0.4rem 1rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tag-critical {
  background: var(--color-critical);
  color: white;
}

.tag-danger {
  background: var(--color-danger);
  color: white;
}

.tag-vulnerable {
  background: var(--color-vulnerable);
  color: var(--color-text);
}

.tag-ecosystem {
  background: var(--color-primary);
  color: white;
}

.tag-climate {
  background: var(--color-secondary);
  color: white;
}

/* Footer */
.footer {
  background: var(--color-bg-dark);
  color: white;
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
  color: white;
  margin-bottom: var(--spacing-md);
  font-size: 1.25rem;
}

.footer-section p,
.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.8;
}

.footer-section a:hover {
  color: var(--color-primary-light);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--spacing-xs);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-md);
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

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

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.fade-in-up {
  animation: fadeInUp 0.8s ease-out;
}

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

/* Responsive */
@media (max-width: 768px) {
  .header-main {
    flex-wrap: wrap;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .nav-main {
    display: none;
    width: 100%;
    order: 3;
  }
  
  .nav-main.active {
    display: block;
  }
  
  .nav-list {
    flex-direction: column;
    width: 100%;
    padding: var(--spacing-sm) 0;
  }
  
  .nav-link {
    width: 100%;
    padding: var(--spacing-sm);
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }
  
  .cards-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  :root {
    font-size: 14px;
  }
  
  .logo img {
    height: 50px;
  }
  
  .hero {
    min-height: 70vh;
  }
}

/* Utilidades */
.text-center {
  text-align: center;
}

.text-primary {
  color: var(--color-primary);
}

.text-secondary {
  color: var(--color-secondary);
}

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }