/* ==========================================
   🎨 BLOG INAB CONSULTING - ESTILOS PRINCIPALES
   ========================================== */

/* ==========================================
   📋 VARIABLES CSS CORPORATIVAS
   ========================================== */
:root {
  /* Colores Corporativos INAB */
  --primary: #2B7B31;
  --primary-light: #4CAF50;
  --primary-dark: #1B5E20;
  --secondary: #FFC107;
  --accent: #FF5722;
  
  /* Paleta de Grises */
  --gray-50: #FAFAFA;
  --gray-100: #F5F5F5;
  --gray-200: #EEEEEE;
  --gray-300: #E0E0E0;
  --gray-400: #BDBDBD;
  --gray-500: #9E9E9E;
  --gray-600: #757575;
  --gray-700: #616161;
  --gray-800: #424242;
  --gray-900: #212121;
  
  /* Colores Semánticos */
  --success: #4CAF50;
  --warning: #FF9800;
  --error: #F44336;
  --info: #2196F3;
  
  /* Tipografía */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Inter', sans-serif;
  --font-mono: 'Fira Code', 'Monaco', 'Cascadia Code', monospace;
  
  /* Espaciado */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Bordes */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --border-radius-xl: 16px;
  
  /* Sombras */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Transiciones */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
}

/* ==========================================
   🌙 DARK MODE VARIABLES
   ========================================== */
[data-theme="dark"] {
  --primary: #4CAF50;
  --primary-light: #81C784;
  --primary-dark: #2E7D32;
  
  --gray-50: #121212;
  --gray-100: #1E1E1E;
  --gray-200: #2D2D2D;
  --gray-300: #404040;
  --gray-400: #6F6F6F;
  --gray-500: #9E9E9E;
  --gray-600: #B3B3B3;
  --gray-700: #CCCCCC;
  --gray-800: #E0E0E0;
  --gray-900: #FFFFFF;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
}

/* ==========================================
   🔄 RESET Y BASE
   ========================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-primary);
  line-height: 1.6;
  color: var(--gray-900);
  background-color: var(--gray-50);
  transition: color var(--transition-normal), background-color var(--transition-normal);
}

/* ==========================================
   📝 TIPOGRAFÍA
   ========================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
  color: var(--gray-900);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.125rem; }

p {
  margin-bottom: var(--spacing-md);
  color: var(--gray-700);
}

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

a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

/* ==========================================
   🎯 HEADER DEL BLOG
   ========================================== */
.blog-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  padding: var(--spacing-lg) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.blog-nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.blog-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: white;
  text-decoration: none;
}

.blog-logo:hover {
  color: white;
  text-decoration: none;
}

.blog-nav-links {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  align-items: center;
}

.blog-nav-links a {
  color: white;
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-md);
  transition: background-color var(--transition-fast);
}

.blog-nav-links a:hover {
  background-color: rgba(255, 255, 255, 0.1);
  text-decoration: none;
}

/* ==========================================
   🎯 CONTROLES DEL BLOG
   ========================================== */
.blog-controls {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.theme-toggle {
  background: none;
  border: 2px solid rgba(255, 255, 255, 0.3);
  color: white;
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-md);
  cursor: pointer;
  font-size: 1.2rem;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
}

.language-selector {
  position: relative;
}

.language-btn {
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.3);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-md);
  cursor: pointer;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  transition: all var(--transition-fast);
}

.language-btn:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

.language-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 150px;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
}

.language-dropdown.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.language-option {
  display: flex;
  align-items: center;
  padding: var(--spacing-md);
  color: var(--gray-700);
  cursor: pointer;
  transition: background-color var(--transition-fast);
  gap: var(--spacing-sm);
}

.language-option:hover {
  background-color: var(--gray-100);
}

.language-option.active {
  background-color: var(--primary);
  color: white;
}

/* ==========================================
   🎯 HERO SECTION
   ========================================== */
.blog-hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  padding: var(--spacing-3xl) 0;
  text-align: center;
}

.blog-hero-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.blog-hero h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  color: white;
}

.blog-hero p {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xl);
  color: rgba(255, 255, 255, 0.9);
}

.blog-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

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

.blog-stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: white;
  display: block;
}

.blog-stat-label {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.8);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ==========================================
   🎯 CONTENIDO PRINCIPAL
   ========================================== */
.blog-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-lg);
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--spacing-2xl);
}

.blog-main {
  background: var(--gray-50);
}

/* ==========================================
   🎯 FILTROS Y BÚSQUEDA
   ========================================== */
.blog-filters {
  background: white;
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--spacing-xl);
}

.filters-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--spacing-lg);
  align-items: end;
}

.filter-group label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--gray-700);
}

.search-input,
.filter-select {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--gray-200);
  border-radius: var(--border-radius-md);
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}

.search-input:focus,
.filter-select:focus {
  outline: none;
  border-color: var(--primary);
}

/* ==========================================
   🎯 GRID DE POSTS
   ========================================== */
.blog-posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.blog-post-card {
  background: white;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.blog-post-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.post-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.post-content {
  padding: var(--spacing-xl);
}

.post-category {
  background: var(--primary);
  color: white;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--border-radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--spacing-md);
  display: inline-block;
}

.post-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--gray-900);
}

.post-title a {
  color: inherit;
  text-decoration: none;
}

.post-title a:hover {
  color: var(--primary);
  text-decoration: none;
}

.post-excerpt {
  color: var(--gray-600);
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

.post-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--gray-200);
  font-size: 0.875rem;
  color: var(--gray-500);
}

.post-date {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.post-read-time {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* ==========================================
   🎯 SIDEBAR
   ========================================== */
.blog-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.sidebar-widget {
  background: white;
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
}

.sidebar-widget h3 {
  color: var(--gray-900);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--primary);
}

.categories-list {
  list-style: none;
}

.categories-list li {
  margin-bottom: var(--spacing-md);
}

.categories-list a {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-md);
  transition: background-color var(--transition-fast);
}

.categories-list a:hover {
  background-color: var(--gray-100);
  text-decoration: none;
}

.category-count {
  background: var(--gray-200);
  color: var(--gray-600);
  padding: 2px 8px;
  border-radius: var(--border-radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
}

/* ==========================================
   🎯 FOOTER DEL BLOG
   ========================================== */
.blog-footer {
  background: var(--gray-900);
  color: var(--gray-300);
  padding: var(--spacing-2xl) 0;
  margin-top: var(--spacing-3xl);
}

.blog-footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  text-align: center;
}

.blog-footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
}

.blog-footer-links a {
  color: var(--gray-300);
  font-weight: 500;
}

.blog-footer-links a:hover {
  color: white;
}

.blog-footer-copyright {
  font-size: 0.875rem;
  color: var(--gray-500);
}

/* ==========================================
   🔝 BOTÓN BACK TO TOP
   ========================================== */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.5rem;
  z-index: 1000;
  transition: all 0.3s ease;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
}

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

.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

/* ==========================================
   📱 RESPONSIVE DESIGN
   ========================================== */
@media (max-width: 768px) {
  .blog-nav {
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
  }
  
  .blog-nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .blog-hero h1 {
    font-size: 2rem;
  }
  
  .blog-container {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    padding: var(--spacing-lg);
  }
  
  .filters-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .blog-posts-grid {
    grid-template-columns: 1fr;
  }
  
  .blog-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .blog-footer-links {
    flex-direction: column;
    gap: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .blog-hero {
    padding: var(--spacing-xl) 0;
  }
  
  .blog-hero h1 {
    font-size: 1.75rem;
  }
  
  .blog-stats {
    grid-template-columns: 1fr;
  }
  
  .post-content {
    padding: var(--spacing-lg);
  }
  
  .sidebar-widget {
    padding: var(--spacing-lg);
  }
}

/* ==========================================
   🎨 UTILIDADES
   ========================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.hidden { display: none !important; }
.visible { display: block !important; }

.fade-in {
  animation: fadeIn 0.5s ease-in-out;
}

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

.loading {
  opacity: 0.6;
  pointer-events: none;
}

/* ==========================================
   🌙 DARK MODE ESPECÍFICO
   ========================================== */
[data-theme="dark"] .blog-post-card {
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
}

[data-theme="dark"] .blog-filters {
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
}

[data-theme="dark"] .sidebar-widget {
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
}

[data-theme="dark"] .search-input,
[data-theme="dark"] .filter-select {
  background: var(--gray-200);
  border-color: var(--gray-300);
  color: var(--gray-900);
}

[data-theme="dark"] .search-input:focus,
[data-theme="dark"] .filter-select:focus {
  border-color: var(--primary);
}

[data-theme="dark"] .categories-list a:hover {
  background-color: var(--gray-200);
}

[data-theme="dark"] .category-count {
  background: var(--gray-300);
  color: var(--gray-700);
}