/* ==========================================================================
   UNITY PULSE 2026 - ESTILOS PRINCIPALES
   Diseño futurista, pulido, divertido y optimizado para Game Developers
   ========================================================================== */

:root {
  /* Paleta Modo Oscuro (Predeterminado) */
  --bg-primary: #0a0e17;
  --bg-secondary: #121826;
  --bg-card: rgba(22, 30, 49, 0.85);
  --bg-card-hover: rgba(30, 41, 67, 0.95);
  --bg-glass: rgba(18, 24, 38, 0.7);
  
  --text-main: #f0f4fc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --accent-cyan: #00f2fe;
  --accent-blue: #4facfe;
  --accent-purple: #8b5cf6;
  --accent-pink: #ec4899;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 242, 254, 0.25);
  
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
  --shadow-neon: 0 0 25px rgba(0, 242, 254, 0.2);
  
  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 'Outfit', sans-serif;
  --font-code: 'JetBrains Mono', monospace;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-bounce: 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Modo Claro Alternativo */
body.theme-light {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.9);
  --bg-card-hover: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.85);
  
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #94a3b8;
  
  --accent-blue: #2563eb;
  --accent-cyan: #0284c7;
  --accent-purple: #7c3aed;
  
  --border-color: rgba(0, 0, 0, 0.08);
  --border-glow: rgba(37, 99, 235, 0.2);
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 10px 25px rgba(0, 0, 0, 0.1);
  --shadow-neon: 0 0 20px rgba(37, 99, 235, 0.15);
}

/* Modo Neón Extra Arcade */
body.theme-neon {
  --bg-primary: #05050d;
  --bg-secondary: #0d0c1d;
  --bg-card: rgba(19, 16, 43, 0.9);
  --bg-card-hover: rgba(28, 24, 61, 0.95);
  --border-color: rgba(236, 72, 153, 0.3);
  --border-glow: rgba(0, 242, 254, 0.5);
  --shadow-neon: 0 0 30px rgba(236, 72, 153, 0.35);
}

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

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Barra de progreso de lectura superior */
#reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple), var(--accent-pink));
  z-index: 1000;
  box-shadow: 0 0 10px var(--accent-cyan);
  transition: width 0.1s ease-out;
}

/* Header & Navegación */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  padding: 0.85rem 1.5rem;
  transition: all var(--transition-fast);
}

.header-container {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  cursor: pointer;
}

.logo-icon {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 0 10px rgba(0, 242, 254, 0.4));
  transition: transform var(--transition-bounce);
}

.brand:hover .logo-icon {
  transform: rotate(20deg) scale(1.1);
}

.logo-icon.small {
  width: 28px;
  height: 28px;
}

.brand-title {
  font-family: var(--font-heading);
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.pulse-tag {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.year-badge {
  font-size: 0.75rem;
  font-family: var(--font-code);
  font-weight: 700;
  background: rgba(0, 242, 254, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 242, 254, 0.35);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
}

.brand-sub {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Gamificación Widget */
.user-gamification {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.user-gamification:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-neon);
}

.xp-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.xp-star {
  font-size: 1.2rem;
  animation: pulse-glow 2s infinite ease-in-out;
}

@keyframes pulse-glow {
  0%, 100% { transform: scale(1); filter: drop-shadow(0 0 2px var(--accent-amber)); }
  50% { transform: scale(1.2); filter: drop-shadow(0 0 8px var(--accent-amber)); }
}

.xp-info {
  display: flex;
  flex-direction: column;
}

.xp-rank {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-main);
}

.xp-points {
  font-size: 0.68rem;
  font-family: var(--font-code);
  color: var(--accent-cyan);
}

.xp-bar-container {
  width: 90px;
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

.xp-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
  border-radius: var(--radius-full);
  transition: width 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 0 8px var(--accent-cyan);
}

/* Controles de Header */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.action-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all var(--transition-fast);
}

.action-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */

.hero-section {
  position: relative;
  padding: 4.5rem 1.5rem 3rem 1.5rem;
  text-align: center;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  opacity: 0.18;
  z-index: 0;
}

.hero-glow-1 {
  top: -100px;
  left: 20%;
  background: radial-gradient(circle, var(--accent-cyan), transparent);
}

.hero-glow-2 {
  top: 50px;
  right: 15%;
  background: radial-gradient(circle, var(--accent-purple), transparent);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 0.4rem 1.1rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.pill-badge {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  color: #fff;
  font-weight: 700;
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.3rem, 5.5vw, 4rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.2rem;
}

.gradient-text {
  background: linear-gradient(135deg, #00f2fe 0%, #4facfe 40%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 720px;
  margin: 0 auto 2.5rem auto;
  line-height: 1.7;
}

/* Métricas Divertidas */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.2rem;
  margin-bottom: 2.5rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1.25rem 1rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.stat-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Botones */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-family: var(--font-main);
  font-size: 0.95rem;
  font-weight: 700;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(79, 172, 254, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(79, 172, 254, 0.5);
  filter: brightness(1.1);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
}

/* ==========================================================================
   FILTROS Y BÚSQUEDA
   ========================================================================== */

.filters-section {
  padding: 1.5rem 1.5rem;
  position: sticky;
  top: 68px;
  z-index: 80;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.filters-container {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.search-box {
  position: relative;
  width: 100%;
}

.search-icon {
  position: absolute;
  left: 1.1rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.1rem;
  color: var(--text-dim);
  pointer-events: none;
}

.search-box input {
  width: 100%;
  padding: 0.85rem 2.8rem 0.85rem 3rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-family: var(--font-main);
  color: var(--text-main);
  outline: none;
  transition: all var(--transition-fast);
}

.search-box input:focus {
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-neon);
}

.clear-btn {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.1rem;
  padding: 0.2rem 0.5rem;
  border-radius: 50%;
}

.clear-btn:hover {
  color: var(--text-main);
}

.categories-tabs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.3rem;
  scrollbar-width: none;
}

.categories-tabs::-webkit-scrollbar {
  display: none;
}

.filter-tab {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.filter-tab:hover {
  color: var(--text-main);
  background: var(--bg-card-hover);
  border-color: var(--accent-cyan);
}

.filter-tab.active {
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.2), rgba(127, 0, 255, 0.2));
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(0, 242, 254, 0.25);
}

/* ==========================================================================
   ARTÍCULOS Y GRID
   ========================================================================== */

.articles-section {
  max-width: 1280px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.articles-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.articles-counter {
  font-size: 0.88rem;
  color: var(--text-muted);
  font-family: var(--font-code);
  background: var(--bg-secondary);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 1.8rem;
}

/* Tarjeta de Artículo */
.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-fast);
  position: relative;
  box-shadow: var(--shadow-sm);
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-neon);
}

.card-badge-top {
  position: absolute;
  top: 1rem;
  left: 1rem;
  z-index: 2;
  display: flex;
  gap: 0.4rem;
}

.category-tag {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--accent-cyan);
}

.read-status-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-full);
  background: rgba(16, 185, 129, 0.9);
  color: #fff;
  display: none;
}

.article-card.is-read .read-status-badge {
  display: inline-block;
}

/* Imagen Ilustrativa del Artículo (SVG Art) */
.card-media {
  height: 200px;
  background: linear-gradient(135deg, #101728 0%, #1a2238 100%);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-media svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.article-card:hover .card-media svg {
  transform: scale(1.05);
}

.card-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.read-time {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-code);
}

.xp-reward {
  color: var(--accent-amber);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.card-title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 0.75rem;
  color: var(--text-main);
  transition: color var(--transition-fast);
}

.article-card:hover .card-title {
  color: var(--accent-cyan);
}

.card-excerpt {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

/* Modo TL;DR toggle dentro de la tarjeta */
.tldr-box {
  background: rgba(0, 242, 254, 0.06);
  border-left: 3px solid var(--accent-cyan);
  padding: 0.65rem 0.85rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 1.25rem;
  font-size: 0.82rem;
  color: var(--text-main);
}

.tldr-title {
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 0.2rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  margin-top: auto;
}

.read-more-btn {
  background: transparent;
  border: none;
  color: var(--accent-blue);
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.read-more-btn:hover {
  color: var(--accent-cyan);
  gap: 0.6rem;
}

.card-reactions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.reaction-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 0.3rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  cursor: pointer;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.25rem;
  transition: all var(--transition-fast);
}

.reaction-btn:hover, .reaction-btn.reacted {
  background: rgba(0, 242, 254, 0.15);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

/* ==========================================================================
   COMPARATIVA VERSUS SECTION (2023 vs 2026)
   ========================================================================== */

.versus-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 4.5rem 1.5rem;
}

.versus-container {
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
}

.section-badge {
  font-family: var(--font-code);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-cyan);
  letter-spacing: 0.08em;
  margin-bottom: 0.8rem;
}

.versus-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 0.6rem;
}

.versus-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 2.5rem;
}

.versus-table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  box-shadow: var(--shadow-md);
}

.versus-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.versus-table th {
  padding: 1.25rem 1.5rem;
  background: rgba(255, 255, 255, 0.03);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 0.95rem;
  border-bottom: 1px solid var(--border-color);
}

.versus-table th.col-past {
  color: #f87171;
}

.versus-table th.col-now {
  color: #34d399;
}

.versus-table td {
  padding: 1.2rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.92rem;
  vertical-align: middle;
}

.versus-table tr:last-child td {
  border-bottom: none;
}

.highlight-tag {
  color: var(--accent-cyan);
  font-weight: 700;
}

/* ==========================================================================
   MODALES (QUIZ Y LECTOR DE ARTÍCULO)
   ========================================================================== */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  animation: fadeIn 0.25s ease-out;
}

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

.modal-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-glow);
  box-shadow: var(--shadow-neon), var(--shadow-md);
  border-radius: var(--radius-lg);
  position: relative;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideUp {
  from { transform: translateY(20px) scale(0.97); opacity: 0; }
  to { transform: translateY(0) scale(1); opacity: 1; }
}

.modal-close-btn {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  width: 36px;
  height: 36px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  border-radius: 50%;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: all var(--transition-fast);
}

.modal-close-btn:hover {
  background: #ef4444;
  color: #fff;
  border-color: #ef4444;
  transform: rotate(90deg);
}

/* Estilos de Quiz */
.quiz-card {
  max-width: 620px;
  padding: 2.5rem 2rem;
}

.quiz-header {
  text-align: center;
  margin-bottom: 2rem;
}

.quiz-icon {
  font-size: 2.8rem;
  display: block;
  margin-bottom: 0.6rem;
}

.quiz-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

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

.quiz-question-box {
  margin-bottom: 1.5rem;
}

.quiz-step-indicator {
  font-size: 0.75rem;
  font-family: var(--font-code);
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.quiz-q-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
  line-height: 1.4;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.quiz-option-btn {
  text-align: left;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 1rem 1.2rem;
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-family: var(--font-main);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: all var(--transition-fast);
}

.quiz-option-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-cyan);
  transform: translateX(4px);
}

.quiz-result-box {
  text-align: center;
  padding: 1rem;
}

.quiz-result-badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  color: #fff;
  font-weight: 800;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

.quiz-result-title {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.quiz-result-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

/* Estilos del Lector Completo de Artículo */
.article-modal-card {
  max-width: 820px;
  padding: 3rem 2.5rem;
}

.article-hero-header {
  margin-bottom: 2rem;
}

.article-full-category {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.1);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
}

.article-full-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 1rem;
}

.article-full-meta {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  color: var(--text-dim);
  font-size: 0.85rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.2rem;
  margin-bottom: 2rem;
}

.article-content-body {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-main);
}

.article-content-body p {
  margin-bottom: 1.5rem;
}

.article-content-body h3 {
  font-family: var(--font-heading);
  font-size: 1.45rem;
  font-weight: 800;
  margin: 2rem 0 1rem 0;
  color: var(--accent-cyan);
}

.article-quote-box {
  background: rgba(139, 92, 246, 0.1);
  border-left: 4px solid var(--accent-purple);
  padding: 1.2rem 1.5rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 1.8rem 0;
  font-style: italic;
  color: #e2e8f0;
}

.pro-tip-box {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 1.2rem 1.5rem;
  border-radius: var(--radius-md);
  margin: 1.8rem 0;
}

.pro-tip-title {
  font-weight: 800;
  color: var(--accent-emerald);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.5rem;
}

.code-snippet-box {
  background: #050811;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 1.2rem;
  margin: 1.8rem 0;
  overflow-x: auto;
}

.code-snippet-box pre {
  font-family: var(--font-code);
  font-size: 0.88rem;
  line-height: 1.6;
  color: #e2e8f0;
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-code);
  font-size: 0.75rem;
  color: var(--text-dim);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 0.5rem;
  margin-bottom: 0.8rem;
}

/* ==========================================================================
   TOAST NOTIFICACIONES
   ========================================================================== */

.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  z-index: 1200;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  background: var(--bg-card);
  border: 1px solid var(--accent-cyan);
  box-shadow: var(--shadow-neon);
  color: var(--text-main);
  padding: 0.85rem 1.2rem;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  animation: slideToast 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideToast {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

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

.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 4rem 1.5rem 2rem 1.5rem;
}

.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 1rem;
  max-width: 380px;
}

.footer-col h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 800;
  margin-bottom: 1.2rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 0.65rem;
}

.footer-col a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--accent-cyan);
}

.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-dim);
}

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */

@media (max-width: 900px) {
  .footer-container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .article-modal-card {
    padding: 2rem 1.5rem;
  }
}

@media (max-width: 640px) {
  .header-container {
    flex-wrap: wrap;
  }
  .user-gamification {
    order: 3;
    width: 100%;
    justify-content: space-between;
  }
  .hero-section {
    padding: 3rem 1rem 2rem 1rem;
  }
  .hero-stats {
    grid-template-columns: 1fr 1fr;
  }
  .filters-section {
    top: 105px;
  }
}