/* =======================
   RESET Y VARIABLES BASE
   ======================= */
:root {
  /* Colores de acento - Constantes en ambos temas */
  --accent-blue: #3b82f6;
  --accent-web: #E6AD22; /* Color dorado para web development */
  --accent-web-dark: #d19f1f; /* Versión más oscura para hover */
  --accent-orange: #f59e0b;
  
  /* Tipografía */
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  
  /* Espaciado */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  
  /* Bordes y sombras */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

/* ==================
   TEMA CLARO (Default)
   ================== */
:root,
html[data-theme="light"] {
  /* Colores principales */
  --primary-dark: #1e293b;
  --primary-gray: #475569;
  --accent-web-light: rgba(230, 173, 34, 0.15);
  
  /* Textos */
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  /* Superficies */
  --surface-1: #ffffff;
  --surface-2: #f8fafc;
  --surface-3: #f1f5f9;
  --border-color: #e2e8f0;
  --border-accent: #cbd5e1;
  
  /* Colores específicos del tema */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --card-bg: rgba(255, 255, 255, 0.8);
  --card-bg-secondary: rgba(248, 250, 252, 0.9);
  --card-border: rgba(226, 232, 240, 0.8);
  --backdrop-blur: rgba(255, 255, 255, 0.1);
  --backdrop-border: rgba(226, 232, 240, 0.3);
  
  /* Sombras para tema claro */
  --shadow-light: 0 2px 8px rgba(15, 23, 42, 0.08);
  --shadow-medium: 0 4px 16px rgba(15, 23, 42, 0.12);
  --shadow-large: 0 8px 32px rgba(15, 23, 42, 0.16);
}

/* ==================
   TEMA OSCURO
   ================== */
html[data-theme="dark"] {
  /* Colores principales */
  --primary-dark: #0a0a0a;
  --primary-gray: #1a1a1a;
  --accent-web-light: rgba(230, 173, 34, 0.1);
  
  /* Textos */
  --text-primary: #ffffff;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  /* Superficies */
  --surface-1: #111111;
  --surface-2: #1e1e1e;
  --surface-3: #2a2a2a;
  --border-color: #333333;
  --border-accent: #404040;
  
  /* Colores específicos del tema */
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-tertiary: #1e1e1e;
  --card-bg: rgba(255, 255, 255, 0.05);
  --card-bg-secondary: rgba(255, 255, 255, 0.08);
  --card-border: rgba(255, 255, 255, 0.1);
  --backdrop-blur: rgba(255, 255, 255, 0.1);
  --backdrop-border: rgba(255, 255, 255, 0.2);
  
  /* Sombras para tema oscuro */
  --shadow-light: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-large: 0 8px 32px rgba(0, 0, 0, 0.5);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-sans);
  background: linear-gradient(135deg, var(--surface-1) 0%, var(--surface-2) 100%);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* =======================
   HERO SECTION - ESTILO MODERNO
   ======================= */
.hero-section {
  position: relative;
  min-height: 100vh;
  height: 100vh;
  max-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 0;
  box-sizing: border-box;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: 1;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  text-align: center;
  position: relative;
  z-index: 2;
}

/* =======================
   CONTENT SECTION - COMPLETAMENTE SEPARADA
   ======================= */
.content-section {
  background: linear-gradient(135deg, var(--surface-1) 0%, var(--surface-2) 100%);
  min-height: 100vh;
  padding: var(--space-2xl) 0;
  position: relative;
  z-index: 10;
}

/* Badge del hero */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--backdrop-blur);
  backdrop-filter: blur(10px);
  border: 1px solid var(--backdrop-border);
  border-radius: 50px;
  padding: var(--space-sm) var(--space-lg);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
}

/* Título del hero */
.hero-title {
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-xl);
  text-shadow: none;
}

.title-highlight {
  display: block;
  background: linear-gradient(135deg, var(--accent-web) 0%, #E6AD22 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.title-main {
  display: block;
  color: var(--text-primary);
  text-shadow: none;
}

/* Subtítulo del hero */
.hero-subtitle {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  color: var(--text-secondary);
  margin-bottom: var(--space-2xl);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.5;
}

/* Estadísticas del hero */
.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  min-width: 120px;
}

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-web);
  font-family: var(--font-mono);
}

.stat-label {
  display: block;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: var(--space-xs);
}

/* Acciones del hero */
.hero-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-lg) var(--space-2xl);
  border-radius: var(--radius-lg);
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  border: 2px solid transparent;
  white-space: nowrap;
}

.hero-cta.primary {
  background: linear-gradient(135deg, var(--accent-web) 0%, var(--accent-web-dark) 100%);
  color: #ffffff;
  text-shadow: none;
  box-shadow: 0 8px 32px rgba(230, 173, 34, 0.3);
}

.hero-cta.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(230, 173, 34, 0.4);
}

.hero-cta.secondary {
  background: var(--backdrop-blur);
  backdrop-filter: blur(10px);
  border-color: var(--backdrop-border);
  color: var(--text-primary);
}

.hero-cta.secondary:hover {
  background: var(--surface-3);
  border-color: var(--accent-web);
}

/* =======================
   SECCIÓN DE HEADER
   ======================= */
.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  padding: 0 var(--space-lg);
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* =======================
   GRID DE NIVELES/FASES
   ======================= */
.level-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.level-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.level-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-web) 0%, var(--accent-web-dark) 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.level-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-large);
  border-color: var(--accent-web);
  background: var(--surface-2);
}

.level-card:hover::before {
  opacity: 1;
}

.level-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
}

.level-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.level-number {
  font-size: 0.75rem;
  font-weight: 700;
  padding: var(--space-xs) var(--space-sm);
  background: var(--accent-web);
  color: var(--primary-dark);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
}

.level-description {
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  line-height: 1.6;
}

.level-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.tag {
  font-size: 0.75rem;
  padding: var(--space-xs) var(--space-sm);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

/* =======================
   SECCIONES DE NIVELES/FASES
   ======================= */
.levels-section {
  margin-bottom: var(--space-2xl);
  padding: 0 var(--space-lg);
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.levels-section-title {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 2px solid var(--border-color);
}

.level-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
}

.level-badge.basic {
  background: #10b981;
  color: white;
}

.level-badge.intermediate {
  background: #f59e0b;
  color: white;
}

.level-badge.advanced {
  background: #ef4444;
  color: white;
}

.level-badge.expert {
  background: #8b5cf6;
  color: white;
}

.level-badge.master {
  background: var(--accent-web);
  color: var(--primary-dark);
}

/* =======================
   DETALLES DE NIVELES/FASES
   ======================= */
.level-detail {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-lg);
  overflow: hidden;
}

.level-detail-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-lg);
  cursor: pointer;
  transition: all 0.3s ease;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border-color);
}

.level-detail-header:hover {
  background: var(--surface-3);
}

.level-info {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.level-info .level-number {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-web);
  color: var(--primary-dark);
  border-radius: 50%;
  font-weight: 700;
  font-family: var(--font-mono);
}

.level-info .level-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.level-meta {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.difficulty {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.toggle-icon {
  color: var(--accent-web);
  transition: transform 0.3s ease;
}

.level-detail[data-expanded="true"] .toggle-icon {
  transform: rotate(90deg);
}

.level-content {
  padding: 0 var(--space-lg) var(--space-lg);
  display: none;
}

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

.level-objective,
.level-solution,
.level-explanation {
  margin-bottom: var(--space-xl);
}

.level-objective h5,
.level-solution h5,
.level-explanation h5 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent-web);
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.level-objective p,
.level-solution p,
.level-explanation p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* =======================
   BLOQUES DE CÓDIGO
   ======================= */
.code-block {
  background: var(--surface-1);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin: var(--space-lg) 0;
  overflow: hidden;
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) var(--space-lg);
  background: var(--surface-2);
  border-bottom: 1px solid var(--border-color);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.copy-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--space-xs);
  border-radius: var(--radius-sm);
  transition: all 0.3s ease;
}

.copy-btn:hover {
  background: var(--surface-3);
  color: var(--accent-web);
}

.code-block pre {
  padding: var(--space-lg);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--text-primary);
}

.code-block code {
  font-family: inherit;
}

/* =======================
   GRIDS Y SHOWCASES
   ======================= */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-lg) 0;
}

.info-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.info-card h4 {
  color: var(--accent-web);
  margin-bottom: var(--space-sm);
}

.info-card ul {
  list-style: none;
  padding: 0;
}

.info-card li {
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
  padding-left: var(--space-lg);
  position: relative;
}

.info-card li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent-web);
}

/* =======================
   PALETA DE COLORES
   ======================= */
.design-showcase {
  margin: var(--space-lg) 0;
}

.color-palette {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.color-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-lg);
}

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

.color-swatch {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  margin: 0 auto var(--space-sm);
  border: 2px solid rgba(255, 255, 255, 0.1);
}

.color-item span {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.color-item code {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: var(--space-xs);
}

/* =======================
   TIPOGRAFÍA SHOWCASE
   ======================= */
.typography-showcase {
  display: grid;
  gap: var(--space-lg);
  margin: var(--space-lg) 0;
}

.font-example {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.font-example h4 {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.font-example p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* =======================
   MEJORAS TÉCNICAS
   ======================= */
.tech-improvements {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-lg) 0;
}

.improvement-item {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.improvement-item h4 {
  color: var(--accent-web);
  margin-bottom: var(--space-sm);
  font-size: 1rem;
}

.improvement-item p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.5;
}

/* =======================
   LECCIONES APRENDIDAS
   ======================= */
.lesson-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-xl) 0;
}

.lesson-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all 0.3s ease;
}

.lesson-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-web);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.lesson-card h3 {
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
  font-size: 1.125rem;
}

.lesson-card p {
  color: var(--text-secondary);
  line-height: 1.6;
  font-size: 0.9rem;
}

/* =======================
   CONCLUSIÓN
   ======================= */
.conclusion-box {
  background: linear-gradient(135deg, 
    rgba(230, 173, 34, 0.1) 0%, 
    rgba(230, 173, 34, 0.05) 100%);
  border: 1px solid var(--accent-web);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  margin: var(--space-2xl) 0;
}

.conclusion-box h3 {
  color: var(--accent-web);
  margin-bottom: var(--space-lg);
  font-size: 1.5rem;
}

.conclusion-box p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.conclusion-box p:last-child {
  margin-bottom: 0;
}

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

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

.animate-fade-in {
  animation: fadeIn 0.8s ease-out;
}

.animate-delay-2 {
  animation-delay: 0.2s;
  animation-fill-mode: both;
}

.animate-delay-3 {
  animation-delay: 0.4s;
  animation-fill-mode: both;
}

.animate-delay-4 {
  animation-delay: 0.6s;
  animation-fill-mode: both;
}

/* =======================
   RESPONSIVE DESIGN
   ======================= */
@media (max-width: 768px) {
  .hero-container {
    padding: 0 var(--space-lg);
  }
  
  .hero-stats {
    gap: var(--space-lg);
  }
  
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }
  
  .hero-cta {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }
  
  .level-grid {
    grid-template-columns: 1fr;
    padding: 0 var(--space-md);
  }
  
  .section-header {
    padding: 0 var(--space-md);
  }
  
  .levels-section {
    padding: 0 var(--space-md);
  }
  
  .level-detail-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
  }
  
  .level-meta {
    align-self: flex-end;
  }
  
  .info-grid {
    grid-template-columns: 1fr;
  }
  
  .color-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .lesson-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .content-section {
    padding: var(--space-xl) 0;
  }
  
  .level-detail-header {
    padding: var(--space-md);
  }
  
  .level-content {
    padding: 0 var(--space-md) var(--space-md);
  }
  
  .hero-badge {
    padding: var(--space-xs) var(--space-md);
    font-size: 0.75rem;
  }
  
  .stat-item {
    min-width: 100px;
    padding: var(--space-md);
  }
}

/* =======================
   SMOOTH SCROLL
   ======================= */
html {
  scroll-behavior: smooth;
}

/* =======================
   UTILIDADES
   ======================= */
.text-center {
  text-align: center;

  transform: scaleX(1);
}

.tech-section:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-glow);
  border-color: var(--web-secondary);
}

.tech-section h4 {
  margin-top: 0;
  margin-bottom: 1.5rem;
  color: var(--web-primary);
  font-size: 1.4rem;
  font-weight: 800;
  position: relative;
  padding-left: 1.5rem;
}

.tech-section h4::before {
  content: '⚡';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  color: var(--web-secondary);
  font-size: 1.2rem;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.tech-item {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-modern);
  padding: 1.5rem;
  text-align: center;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.tech-item::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--web-gradient);
  transform: scaleX(0);
  transition: var(--transition-smooth);
}

.tech-item:hover::after {
  transform: scaleX(1);
}

.tech-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-glow);
  border-color: var(--web-secondary);
}

.tech-item strong {
  display: block;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--web-primary);
  margin-bottom: 0.5rem;
}

.challenges-list {
  display: grid;
  gap: 1.5rem;
  margin: 2rem 0;
}

.challenge-item {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-modern);
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.challenge-item::before {
  content: '🚀';
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 1.5rem;
  opacity: 0.6;
  transition: var(--transition-smooth);
}

.challenge-item:hover::before {
  opacity: 1;
  transform: scale(1.2);
}

.challenge-item:hover {
  transform: translateX(10px);
  box-shadow: var(--shadow-glow);
  border-color: var(--web-accent);
}

.tech-section ul {
  margin-bottom: 0;
}

.tech-section strong {
  color: var(--web-secondary);
}

/* ===================== DESAFÍOS ===================== */

.challenge-item {
  margin: 2rem 0;
  border: 1px solid var(--card-border-light);
  border-radius: 12px;
  overflow: hidden;
}

.challenge-item h3 {
  background: var(--web-primary);
  color: white;
  margin: 0;
  padding: 1rem 1.5rem;
  font-size: 1.25rem;
}

.challenge-content {
  padding: 1.5rem;
}

.problem,
.solution {
  margin-bottom: 1.5rem;
}

.problem:last-child,
.solution:last-child {
  margin-bottom: 0;
}

.problem h4 {
  color: var(--web-danger);
  margin-top: 0;
}

.solution h4 {
  color: var(--web-success);
  margin-top: 0;
}

/* ===================== LECCIONES ===================== */

.lesson-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.lesson-card {
  background: linear-gradient(135deg, var(--gray-50), var(--card-bg-light));
  border: 1px solid var(--card-border-light);
  border-radius: 12px;
  padding: 1.5rem;
  transition: all 0.3s ease;
}

.lesson-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--web-secondary);
}

.lesson-card h3 {
  margin-top: 0;
  margin-bottom: 1rem;
  color: var(--web-primary);
}

.lesson-card p {
  margin-bottom: 0;
  font-size: 0.95rem;
  line-height: 1.6;
}

.insights-box {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.05), rgba(59, 130, 246, 0.05));
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: 12px;
  padding: 2rem;
  margin: 2rem 0;
}

.insights-box h3 {
  color: var(--web-success);
  margin-top: 0;
}

.insights-box strong {
  color: var(--web-primary);
}

/* ===================== ROADMAP ===================== */

.roadmap {
  display: grid;
  gap: 1.5rem;
  margin: 2rem 0;
}

.roadmap-item {
  background: var(--card-bg-light);
  border: 1px solid var(--card-border-light);
  border-radius: 12px;
  padding: 1.5rem;
  position: relative;
}

.roadmap-status {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.roadmap-status.planned {
  background: rgba(59, 130, 246, 0.1);
  color: var(--web-info);
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.roadmap-status.consideration {
  background: rgba(245, 158, 11, 0.1);
  color: var(--web-warning);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.roadmap-item h4 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  color: var(--web-primary);
  margin-right: 100px;
}

.roadmap-item p {
  margin-bottom: 0;
  color: var(--text-secondary-light);
}

.tech-improvements {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.improvement-item {
  background: var(--gray-50);
  border: 1px solid var(--card-border-light);
  border-radius: 12px;
  padding: 1.5rem;
}

.improvement-item h4 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  color: var(--web-primary);
}

.improvement-item p {
  margin-bottom: 0;
  font-size: 0.95rem;
  color: var(--text-secondary-light);
}

.conclusion-box {
  background: linear-gradient(135deg, rgba(28, 81, 151, 0.05), rgba(230, 173, 34, 0.05));
  border: 2px solid var(--web-primary);
  border-radius: 16px;
  padding: 2.5rem;
  margin: 3rem 0;
  text-align: center;
}

.conclusion-box h3 {
  color: var(--web-primary);
  margin-top: 0;
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

.conclusion-box p {
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.conclusion-box p:last-child {
  margin-bottom: 0;
}

.conclusion-box strong {
  color: var(--web-secondary);
}

/* ===================== FOOTER ===================== */

footer {
  background: var(--card-bg-light);
  border-top: 1px solid var(--card-border-light);
  padding: 2rem 0;
  margin-top: 3rem;
}

.footer-content {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--web-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: var(--web-secondary);
}

/* ===================== BOTÓN VOLVER ATRÁS ===================== */

.back-btn-container {
  position: fixed;
  top: 120px;
  left: 2rem;
  z-index: 100;
}

.back-btn {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--web-primary);
  cursor: pointer;
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-soft);
}

.back-btn:hover {
  background: var(--web-primary);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-strong);
}

.back-btn:active {
  transform: translateY(0);
}

/* ===================== RESPONSIVE MEJORADO ===================== */

@media (max-width: 1200px) {
  .project-content {
    grid-template-columns: 250px 1fr !important;
    gap: 2rem;
    padding: 2rem 0;
  }
  
  .project-sidebar {
    padding: 2rem;
  }
}

@media (max-width: 968px) {
  .project-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .project-sidebar {
    position: static;
    order: -1;
    background: var(--glass-bg);
    backdrop-filter: var(--backdrop-blur);
    border-radius: var(--border-radius-modern);
    padding: 2rem;
    box-shadow: var(--shadow-soft);
  }
  
  .project-nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
  }
  
  .nav-item {
    flex: 1;
    text-align: center;
    min-width: 140px;
    max-width: 200px;
  }
  
  .timeline {
    padding-left: 2rem;
  }
  
  .timeline-item {
    padding-left: 3rem;
  }
  
  .timeline-marker {
    left: -2.5rem;
    width: 2.5rem;
    height: 2.5rem;
  }
}

@media (max-width: 768px) {
  :root {
    --article-padding: 2rem;
    --sidebar-width: 100%;
    --hero-padding: 3rem 1.5rem 2.5rem;
  }
  
  .project-content {
    padding: 2rem 1rem;
    gap: 2rem;
  }
  
  .project-hero {
    padding: var(--hero-padding);
    background-attachment: scroll;
  }
  
  .project-title {
    font-size: 2.5rem;
    line-height: 1.2;
  }
  
  .project-subtitle {
    font-size: 1.2rem;
  }
  
  .project-meta {
    gap: 1.5rem;
    flex-direction: column;
  }
  
  .meta-card {
    flex: 1;
    min-width: auto;
  }
  
  .breadcrumb ol {
    padding: 0 1rem;
    flex-wrap: wrap;
  }
  
  .features-grid,
  .info-grid,
  .lesson-grid,
  .tech-improvements,
  .tech-details {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .color-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }
  
  .project-sidebar {
    padding: 1.5rem;
    margin: 0;
  }
  
  .project-nav {
    flex-direction: column;
    gap: 0.75rem;
  }
  
  .nav-item {
    min-width: auto;
    padding: 1rem;
  }
  
  .timeline {
    padding-left: 1.5rem;
  }
  
  .timeline-item {
    padding: 1.5rem 1.5rem 1.5rem 3rem;
    margin-bottom: 2rem;
  }
  
  .timeline-marker {
    left: -2rem;
    width: 2rem;
    height: 2rem;
    font-size: 0.9rem;
  }
  
  .code-block {
    padding: 1.5rem;
    margin: 1.5rem 0;
  }
  
  .code-block pre {
    font-size: 0.85rem;
  }
}

@media (max-width: 480px) {
  .project-title {
    font-size: 2.2rem;
    margin-bottom: 1rem;
  }
  
  .project-subtitle {
    font-size: 1.15rem;
    line-height: 1.4;
  }
  
  .meta-item {
    flex: 1;
    padding: 1rem;
  }
  
  .tech-stack {
    gap: 0.5rem;
    flex-wrap: wrap;
  }
  
  .tech-item {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
  }
  
  .color-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .color-swatch {
    width: 60px;
    height: 60px;
  }
  
  .content-section h2 {
    font-size: 2rem;
  }
  
  .content-section h3 {
    font-size: 1.5rem;
  }
  
  .timeline {
    padding-left: 1rem;
  }
  
  .timeline-item {
    padding: 1rem 1rem 1rem 2rem;
  }
  
  .timeline-marker {
    left: -1.5rem;
    width: 1.5rem;
    height: 1.5rem;
    font-size: 0.75rem;
  }
  
  .feature-card,
  .tech-section,
  .challenge-item {
    padding: 1.5rem;
  }
  
  .nav-item {
    padding: 0.75rem;
    font-size: 0.9rem;
  }
}

/* ===================== TEMA OSCURO ===================== */

html[data-theme="dark"] .web-project-page {
  background: var(--main-bg-light);
  color: var(--text-primary-light);
}

html[data-theme="dark"] .breadcrumb {
  background: var(--card-bg-light);
  border-bottom-color: var(--card-border-light);
}

html[data-theme="dark"] .breadcrumb a {
  color: var(--web-info);
}

html[data-theme="dark"] .breadcrumb a:hover {
  color: var(--web-secondary);
}

html[data-theme="dark"] .breadcrumb li[aria-current="page"] {
  color: var(--text-secondary-light);
}

html[data-theme="dark"] .project-sidebar {
  background: var(--card-bg-light);
  border-color: var(--card-border-light);
}

html[data-theme="dark"] .nav-item:hover,
html[data-theme="dark"] .nav-item.active {
  background: var(--web-info);
}

html[data-theme="dark"] .project-link {
  background: var(--card-bg-secondary-light);
  border-color: var(--card-border-light);
  color: var(--text-primary-light);
}

html[data-theme="dark"] .project-link:hover {
  background: var(--web-info);
  color: white;
}

html[data-theme="dark"] .project-article {
  background: var(--card-bg-light);
  border-color: var(--card-border-light);
}

html[data-theme="dark"] .content-section {
  border-bottom-color: var(--card-border-light);
}

html[data-theme="dark"] .content-section h2 {
  color: var(--web-info);
}

html[data-theme="dark"] .content-section h2::after {
  background: linear-gradient(90deg, var(--web-info), var(--web-secondary));
}

html[data-theme="dark"] .content-section h3 {
  color: var(--text-primary-light);
}

html[data-theme="dark"] .content-section h4 {
  color: var(--web-secondary);
}

html[data-theme="dark"] .highlight-box {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(230, 173, 34, 0.1));
  border-color: rgba(59, 130, 246, 0.3);
}

html[data-theme="dark"] .info-card,
html[data-theme="dark"] .color-palette,
html[data-theme="dark"] .font-example,
html[data-theme="dark"] .tech-section,
html[data-theme="dark"] .feature-card,
html[data-theme="dark"] .lesson-card,
html[data-theme="dark"] .improvement-item {
  background: var(--card-bg-secondary-light);
  border-color: var(--card-border-light);
}

html[data-theme="dark"] .info-card h4,
html[data-theme="dark"] .tech-section h4,
html[data-theme="dark"] .feature-card h3,
html[data-theme="dark"] .lesson-card h3,
html[data-theme="dark"] .improvement-item h4 {
  color: var(--web-info);
}

html[data-theme="dark"] .feature-card:hover,
html[data-theme="dark"] .lesson-card:hover {
  border-color: var(--web-info);
}

html[data-theme="dark"] .challenge-item h3 {
  background: var(--web-info);
}

html[data-theme="dark"] .timeline-marker {
  background: var(--timeline-color);
}

html[data-theme="dark"] .timeline-content h4 {
  color: var(--web-info);
}

html[data-theme="dark"] .roadmap-item {
  background: var(--card-bg-light);
  border-color: var(--card-border-light);
}

html[data-theme="dark"] .roadmap-item h4 {
  color: var(--web-info);
}

html[data-theme="dark"] .conclusion-box {
  background: linear-gradient(135deg, 
    rgba(230, 173, 34, 0.1) 0%, 
    rgba(230, 173, 34, 0.05) 100%);
  border-color: var(--web-info);
}

html[data-theme="dark"] footer {
  background: var(--card-bg-light);
  border-top-color: var(--card-border-light);
}

html[data-theme="dark"] .footer-links a {
  color: var(--web-info);
}

html[data-theme="dark"] .footer-links a:hover {
  color: var(--web-secondary);
}

html[data-theme="dark"] .color-item code {
  background: var(--card-bg-secondary-light);
  color: var(--text-primary-light);
}

html[data-theme="dark"] .insights-box {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.1), rgba(59, 130, 246, 0.1));
  border-color: rgba(34, 197, 94, 0.3);
}

html[data-theme="dark"] .insights-box h3 {
  color: var(--web-success);
}

html[data-theme="dark"] .insights-box strong {
  color: var(--web-info);
}

/* ===================== ANIMACIONES ===================== */

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

.content-section {
  animation: fadeInUp 0.6s ease-out;
}

.feature-card,
.lesson-card,
.info-card {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-link,
.nav-item {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===================== PRINT STYLES ===================== */

@media print {
  .project-sidebar,
  .breadcrumb,
  nav,
  footer,
  .back-btn-container {
    display: none;
  }
  
  .project-content {
    grid-template-columns: 1fr;
    max-width: none;
    margin: 0;
    padding: 0;
  }
  
  .project-hero {
    background: none;
    color: #000;
    padding: 2rem 0;
  }
  
  .project-title {
    background: none;
    -webkit-text-fill-color: initial;
    color: #000;
  }
  
  .content-section {
    break-inside: avoid;
    page-break-inside: avoid;
  }
}

/* ==================
   MEJORAS TEMA CLARO
   ================== */
html[data-theme="light"] .hero-cta.primary {
  color: #ffffff;
  text-shadow: none;
}

html[data-theme="light"] .title-main {
  color: var(--text-primary);
  text-shadow: none;
}

html[data-theme="light"] .hero-title {
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

html[data-theme="light"] .hero-badge,
html[data-theme="light"] .stat-item {
  background: var(--surface-2);
  border-color: var(--border-color);
  box-shadow: var(--shadow-light);
}

html[data-theme="light"] .level-card {
  background: var(--surface-1);
  border-color: var(--border-color);
  box-shadow: var(--shadow-light);
}

html[data-theme="light"] .level-card:hover {
  box-shadow: var(--shadow-large);
  background: var(--surface-2);
}

html[data-theme="light"] .info-card,
html[data-theme="light"] .color-palette,
html[data-theme="light"] .font-example,
html[data-theme="light"] .improvement-item,
html[data-theme="light"] .lesson-card {
  background: var(--surface-2);
  border-color: var(--border-color);
  box-shadow: var(--shadow-light);
}

html[data-theme="light"] .lesson-card:hover {
  box-shadow: var(--shadow-medium);
  background: var(--surface-3);
}

html[data-theme="light"] .level-detail {
  background: var(--surface-1);
  border-color: var(--border-color);
  box-shadow: var(--shadow-light);
}

html[data-theme="light"] .level-detail-header {
  background: var(--surface-2);
  border-bottom: 1px solid var(--border-color);
}

html[data-theme="light"] .level-detail-header:hover {
  background: var(--surface-3);
}

html[data-theme="light"] .tag {
  background: var(--surface-3);
  border-color: var(--border-accent);
  color: var(--text-muted);
}

html[data-theme="light"] .copy-btn:hover {
  background: var(--surface-3);
  color: var(--accent-web);
}

html[data-theme="light"] .hero-cta.secondary {
  background: var(--surface-2);
  border-color: var(--border-accent);
  color: var(--text-primary);
}

html[data-theme="light"] .hero-cta.secondary:hover {
  background: var(--surface-3);
  border-color: var(--accent-web);
}

html[data-theme="light"] .conclusion-box {
  background: linear-gradient(135deg, 
    var(--accent-web-light) 0%, 
    rgba(230, 173, 34, 0.05) 100%);
  border-color: var(--accent-web);
  box-shadow: var(--shadow-medium);
}

/* ==================
   MEJORAS TEMA OSCURO
   ================== */
html[data-theme="dark"] .hero-badge,
html[data-theme="dark"] .stat-item,
html[data-theme="dark"] .level-card {
  backdrop-filter: blur(10px);
}

html[data-theme="dark"] .level-card:hover {
  box-shadow: var(--shadow-large);
}

html[data-theme="dark"] .lesson-card:hover {
  box-shadow: var(--shadow-medium);
}

html[data-theme="dark"] .info-card,
html[data-theme="dark"] .color-palette,
html[data-theme="dark"] .font-example,
html[data-theme="dark"] .improvement-item,
html[data-theme="dark"] .lesson-card,
html[data-theme="dark"] .level-detail {
  backdrop-filter: blur(10px);
}

html[data-theme="dark"] .conclusion-box {
  background: linear-gradient(135deg, 
    rgba(230, 173, 34, 0.1) 0%, 
    rgba(230, 173, 34, 0.05) 100%);
}

html[data-theme="dark"] .hero-title {
  text-shadow: none;
}

html[data-theme="dark"] .title-main {
  color: var(--text-primary);
  text-shadow: none;
}

/* ===================== PRINT STYLES ===================== */