/**
 * Renzo Dupont - Tech Blog
 * Paleta de Colores (Dark Theme with Turquoise):
 * - Fondo Principal: #0a0e27 (Dark blue-black)
 * - Fondo Secundario: #151932 (Slightly lighter dark)
 * - Texto Principal: #e4e6eb (Light gray)
 * - Color Primario (Acentos): #06b6d4 (Turquoise/Cyan)
 * - Color Secundario: #14b8a6 (Teal)
 * - Color Acento: #0891b2 (Dark turquoise)
 */

/* === IMPORTAR GOOGLE FONTS === */
@import url("https://fonts.googleapis.com/css2?family=Orbitron:wght@400;500;600;700;800;900&family=Poppins:wght@300;400;500;600;700;800;900&family=Space+Grotesk:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;700&display=swap");

/* === VARIABLES CSS === */
:root {
  --color-bg-primary: #0a0e27;
  --color-bg-secondary: #151932;
  --color-bg-tertiary: #1e2442;
  --color-text-primary: #e4e6eb;
  --color-text-secondary: #9ca3af;
  --color-accent-primary: #06b6d4;
  --color-accent-secondary: #14b8a6;
  --color-accent-cyan: #0891b2;
  --color-gradient: linear-gradient(135deg, #06b6d4 0%, #14b8a6 100%);
  --font-logo: "Orbitron", sans-serif;
  --font-display: "Poppins", sans-serif;
  --font-body: "Space Grotesk", sans-serif;
  --font-mono: "JetBrains Mono", monospace;
  --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: all 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --shadow-glow: 0 0 30px rgba(6, 182, 212, 0.3);
  --shadow-strong: 0 20px 60px rgba(0, 0, 0, 0.4);
}

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

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

body {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.7;
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  position: relative;
}

/* Efecto de textura de fondo sutil */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.015;
  z-index: -1;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  pointer-events: none;
  animation: noise 8s steps(10) infinite;
}

@keyframes noise {
  0%,
  100% {
    transform: translate(0, 0);
  }
  10% {
    transform: translate(-5%, -5%);
  }
  20% {
    transform: translate(-10%, 5%);
  }
  30% {
    transform: translate(5%, -10%);
  }
  40% {
    transform: translate(-5%, 15%);
  }
  50% {
    transform: translate(-10%, 5%);
  }
  60% {
    transform: translate(15%, 0);
  }
  70% {
    transform: translate(0, 10%);
  }
  80% {
    transform: translate(-15%, 0);
  }
  90% {
    transform: translate(10%, 5%);
  }
}

/* === TIPOGRAFÍA === */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
  position: relative;
}

h1 {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 800;
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradient-shift 3s ease infinite;
  background-size: 200% 200%;
}

@keyframes gradient-shift {
  0%,
  100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

h2 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  color: var(--color-accent-primary);
  position: relative;
  display: inline-block;
}

h2::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--color-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

h2:hover::after {
  transform: scaleX(1);
}

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

p {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
  line-height: 1.8;
}

a {
  color: var(--color-accent-primary);
  text-decoration: none;
  transition: var(--transition-smooth);
  position: relative;
}

a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-accent-primary);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s ease;
}

a:hover {
  color: var(--color-accent-secondary);
  transform: translateX(5px);
}

a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* === CONTENEDOR GENERAL === */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

.container-narrow {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* === HEADER Y NAVEGACIÓN === */
header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 1000;
  transition: var(--transition-smooth);
  padding: 0.5rem 0;
}

header.scrolled {
  box-shadow: var(--shadow-strong);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.logo {
  font-family: var(--font-logo);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: var(--transition-bounce);
  animation: pulse-glow 3s ease-in-out infinite;
  text-decoration: none;
}

@keyframes pulse-glow {
  0%,
  100% {
    filter: brightness(1);
  }
  50% {
    filter: brightness(1.3);
  }
}

.logo:hover {
  transform: scale(1.05) rotate(-2deg);
  filter: brightness(1.2);
  text-decoration: none;
  opacity: 1;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 2.5rem;
  align-items: center;
  flex-wrap: wrap;
}

nav ul li a {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-primary);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  position: relative;
  overflow: hidden;
  transition: var(--transition-smooth);
}

nav ul li a::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-gradient);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s ease;
}

nav ul li a:hover {
  color: var(--color-accent-primary);
  transform: translateY(-2px);
  text-decoration: none;
}

nav ul li a:hover::before {
  transform: scaleX(1);
  transform-origin: left;
}

nav ul li a:hover::after {
  display: none;
}

/* === MOBILE MENU TOGGLE === */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
  transition: var(--transition-smooth);
}

.mobile-menu-toggle span {
  width: 28px;
  height: 3px;
  background: var(--color-accent-primary);
  border-radius: 3px;
  transition: var(--transition-smooth);
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* === HERO SECTION === */
.hero {
  position: relative;
  background: linear-gradient(135deg, #050812 0%, var(--color-bg-primary) 100%);
  color: var(--color-text-primary);
  padding: clamp(4rem, 15vh, 8rem) 0;
  text-align: center;
  margin-bottom: 4rem;
  overflow: hidden;
}

/* Canvas de partículas */
.particle-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* Respetar preferencias de movimiento reducido */
@media (prefers-reduced-motion: reduce) {
  .particle-canvas {
    display: none;
  }
}

/* Mantener gradiente de fondo sutil */
.hero::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    circle,
    rgba(6, 182, 212, 0.05) 0%,
    transparent 70%
  );
  animation: rotate-gradient 30s linear infinite;
  z-index: 0;
}

@keyframes rotate-gradient {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-gradient);
  animation: pulse-line 2s ease-in-out infinite;
  z-index: 1;
}

@keyframes pulse-line {
  0%,
  100% {
    opacity: 0.5;
    transform: scaleX(0.8);
  }
  50% {
    opacity: 1;
    transform: scaleX(1);
  }
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero h1 {
  position: relative;
  max-width: 1000px;
  margin: 0 auto 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  text-shadow: 0 2px 20px rgba(6, 182, 212, 0.3);
  animation: float-title 4s ease-in-out infinite;
}

@keyframes float-title {
  0%,
  100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
}

.hero p {
  position: relative;
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  max-width: 800px;
  margin: 0 auto;
  color: var(--color-text-secondary);
  line-height: 1.8;
  animation: fade-in-up 1s ease-out 0.3s backwards;
}

/* === SEARCH BAR STYLES === */
.search-container {
  flex: 1;
  max-width: 400px;
  margin: 0 2rem;
}

.search-form {
  position: relative;
  display: flex;
  align-items: center;
}

.search-input {
  width: 100%;
  padding: 0.75rem 1rem;
  padding-right: 3rem;
  border: 2px solid var(--color-bg-tertiary);
  border-radius: 25px;
  font-size: 0.9rem;
  background: var(--color-bg-primary);
  transition: var(--transition-smooth);
  font-family: var(--font-body);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 0 3px rgba(185, 28, 28, 0.1);
}

.search-btn {
  position: absolute;
  right: 0.5rem;
  background: var(--color-gradient);
  color: var(--color-bg-primary);
  border: none;
  border-radius: 50%;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-smooth);
  box-shadow: 0 2px 10px rgba(185, 28, 28, 0.2);
}

.search-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 15px rgba(185, 28, 28, 0.3);
}

/* === FEATURED SECTION === */
.featured-section {
  background: linear-gradient(
    135deg,
    var(--color-bg-secondary) 0%,
    var(--color-bg-primary) 100%
  );
  padding: 5rem 0;
  position: relative;
  overflow: hidden;
}

.featured-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: -50%;
  width: 200%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(185, 28, 28, 0.03) 50%,
    transparent 100%
  );
  animation: slide-gradient 15s linear infinite;
}

@keyframes slide-gradient {
  from {
    transform: translateX(-50%);
  }
  to {
    transform: translateX(50%);
  }
}

.featured-grid {
  display: grid;
  gap: 2rem;
  margin-top: 3rem;
  position: relative;
  z-index: 1;
}

/* === FEATURED PAGINATION CONTROLS === */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
  position: relative;
  z-index: 10;
}

.featured-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--color-bg-secondary);
  padding: 0.5rem 1rem;
  border-radius: 50px;
  border: 2px solid var(--color-bg-tertiary);
  position: relative;
  z-index: 10;
}

.control-btn {
  background: transparent;
  border: none;
  color: var(--color-text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  transition: var(--transition-smooth);
  padding: 0;
  position: relative;
  z-index: 10;
}

.control-btn:hover:not(:disabled) {
  background: var(--color-accent-primary);
  color: var(--color-bg-primary);
  transform: scale(1.1);
}

.control-btn:disabled {
  cursor: not-allowed;
  opacity: 0.3;
}

.control-btn svg {
  width: 20px;
  height: 20px;
}

.counter {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  min-width: 60px;
  text-align: center;
  font-weight: 600;
}

/* Auto-play indicator */
.featured-controls::after {
  content: "●";
  color: var(--color-accent-primary);
  font-size: 0.6rem;
  margin-left: 0.5rem;
  animation: autoplay-pulse 2s ease-in-out infinite;
}

@keyframes autoplay-pulse {
  0%,
  100% {
    opacity: 0.3;
  }
  50% {
    opacity: 1;
  }
}

/* === PAGINATION CONTROLS === */
.pagination-controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  margin-top: 3rem;
  padding: 2rem;
  background: var(--color-bg-secondary);
  border-radius: 16px;
  border: 2px solid var(--color-bg-tertiary);
}

.load-more-btn {
  background: var(--color-gradient);
  color: var(--color-bg-primary);
  border: none;
  padding: 1rem 3rem;
  font-size: 1.1rem;
  font-weight: 700;
  font-family: var(--font-display);
  border-radius: 50px;
  cursor: pointer;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
  position: relative;
  overflow: hidden;
}

.load-more-btn::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.load-more-btn:hover::before {
  width: 300px;
  height: 300px;
}

.load-more-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 25px rgba(99, 102, 241, 0.5);
}

.load-more-btn:active {
  transform: translateY(-1px);
}

.pagination-info {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  text-align: center;
}

.pagination-info strong {
  color: var(--color-accent-primary);
  font-weight: 700;
}

/* Full-width Featured Card Design */
.featured-card {
  background: var(--color-bg-primary);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  transition: var(--transition-smooth);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  min-height: 400px;
  position: relative;
  border: 2px solid transparent;
}

.featured-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-glow), var(--shadow-strong);
  border-color: var(--color-accent-primary);
}

.featured-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-gradient);
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: 1;
  pointer-events: none;
}

.featured-card:hover::before {
  opacity: 0.02;
}

.featured-image {
  position: relative;
  overflow: hidden;
  background: var(--color-bg-tertiary);
}

.featured-image::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    to right,
    rgba(0, 0, 0, 0.1) 0%,
    transparent 100%
  );
}

.featured-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.featured-card:hover .featured-image img {
  transform: scale(1.08);
}

.featured-content {
  padding: 3rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  z-index: 2;
}

.featured-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-accent-primary);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
}

.featured-label::before {
  content: "★";
  font-size: 1rem;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.6;
    transform: scale(1.2);
  }
}

.featured-content h3 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: var(--color-text-primary);
}

.featured-content h3 a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-smooth);
  background: linear-gradient(
    to right,
    var(--color-accent-primary),
    var(--color-accent-secondary)
  );
  background-size: 0% 3px;
  background-repeat: no-repeat;
  background-position: left bottom;
}

.featured-card:hover .featured-content h3 a {
  background-size: 100% 3px;
  color: var(--color-accent-secondary);
}

.featured-excerpt {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: 2rem;
  font-weight: 400;
}

.featured-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-top: 1.5rem;
  border-top: 2px solid var(--color-bg-tertiary);
  flex-wrap: wrap;
}

.featured-meta time {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.featured-meta time::before {
  content: "📅";
  font-size: 1rem;
}

/* Alternating layout for featured cards */
.featured-card:nth-child(even) {
  grid-template-columns: 1fr 1.2fr;
}

.featured-card:nth-child(even) .featured-image {
  order: 2;
}

.featured-card:nth-child(even) .featured-content {
  order: 1;
}

/* === SEARCH RESULTS === */
.search-results {
  background: linear-gradient(135deg, #fff9e6 0%, #fff3cd 50%, #ffe9a6 100%);
  border-top: 3px solid #ffc107;
  border-bottom: 3px solid #ffc107;
  padding: 3rem 0;
  margin: 2rem 0;
}

.clear-search-btn {
  background: var(--color-gradient);
  color: var(--color-bg-primary);
  border: none;
  padding: 1rem 2rem;
  border-radius: 30px;
  cursor: pointer;
  margin: 2rem auto 0;
  font-size: 1rem;
  font-weight: 600;
  transition: var(--transition-bounce);
  display: block;
  font-family: var(--font-body);
  box-shadow: 0 4px 15px rgba(185, 28, 28, 0.3);
}

.clear-search-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 20px rgba(185, 28, 28, 0.4);
}

/* === TAGS === */
.tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tag {
  background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
  color: #1565c0;
  padding: 0.4rem 1rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: var(--transition-smooth);
  border: 1px solid #90caf9;
}

.tag:hover {
  background: linear-gradient(135deg, #bbdefb 0%, #90caf9 100%);
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(21, 101, 192, 0.2);
}

/* === LOADING STYLES === */
.loading {
  text-align: center;
  padding: 3rem;
  color: var(--color-text-secondary);
  font-style: italic;
  font-size: 1.1rem;
  font-family: var(--font-mono);
}

.loading::after {
  content: "...";
  animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
  0%,
  20% {
    content: ".";
  }
  40% {
    content: "..";
  }
  60%,
  100% {
    content: "...";
  }
}

@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* === GRID DE ARTÍCULOS === */
.articles-section {
  padding: 4rem 0;
  position: relative;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: 3rem;
  text-align: center;
  color: var(--color-accent-primary);
  position: relative;
  display: inline-block;
  left: 50%;
  transform: translateX(-50%);
}

.section-title::before {
  content: "//";
  position: absolute;
  left: -50px;
  color: var(--color-accent-cyan);
  font-family: var(--font-mono);
  animation: blink 1.5s step-end infinite;
}

@keyframes blink {
  0%,
  50% {
    opacity: 1;
  }
  51%,
  100% {
    opacity: 0;
  }
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 3rem;
  margin-bottom: 4rem;
  perspective: 1000px;
}

/* === TARJETA DE ARTÍCULO === */
.article-card {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-bg-tertiary);
  border-radius: 16px;
  overflow: hidden;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  display: flex;
  flex-direction: column;
  cursor: pointer;
  position: relative;
  transform-style: preserve-3d;
  animation: fade-in-up 0.6s ease-out backwards;
}

.article-card:nth-child(1) {
  animation-delay: 0.1s;
}
.article-card:nth-child(2) {
  animation-delay: 0.2s;
}
.article-card:nth-child(3) {
  animation-delay: 0.3s;
}
.article-card:nth-child(4) {
  animation-delay: 0.4s;
}
.article-card:nth-child(5) {
  animation-delay: 0.5s;
}
.article-card:nth-child(6) {
  animation-delay: 0.6s;
}
.article-card:nth-child(7) {
  animation-delay: 0.7s;
}
.article-card:nth-child(8) {
  animation-delay: 0.8s;
}
.article-card:nth-child(9) {
  animation-delay: 0.9s;
}

.article-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-gradient);
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: 0;
}

.article-card:hover {
  transform: translateY(-15px) rotateX(5deg);
  box-shadow: var(--shadow-glow), var(--shadow-strong);
  border-color: var(--color-accent-primary);
}

.article-card:hover::before {
  opacity: 0.1;
}

.article-card img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  display: block;
  transition: var(--transition-smooth);
  position: relative;
  z-index: 1;
  filter: grayscale(0%) brightness(0.95);
}

.article-card:hover img {
  transform: scale(1.1);
  filter: grayscale(0%) brightness(1.05);
}

.article-card-content {
  padding: 2rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 1;
}

.article-card-content h3 {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  margin-bottom: 1rem;
  color: var(--color-text-primary);
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.3;
  transition: var(--transition-smooth);
}

.article-card:hover .article-card-content h3 {
  color: var(--color-accent-secondary);
  transform: translateX(10px);
}

.article-card-content p {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.article-card-content .read-more {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition-bounce);
  align-self: flex-start;
}

.article-card-content .read-more::after {
  content: "→";
  transition: transform 0.3s ease;
  display: inline-block;
}

.article-card:hover .article-card-content .read-more {
  gap: 1rem;
  color: var(--color-accent-secondary);
}

.article-card:hover .article-card-content .read-more::after {
  transform: translateX(10px);
}

.article-card-content h3 a {
  color: var(--color-text-primary);
  transition: var(--transition-smooth);
}

.article-card-content h3 a:hover {
  color: var(--color-accent-primary);
  text-decoration: none;
}

.article-date {
  font-size: 0.9rem;
  color: var(--color-accent-cyan);
  font-family: var(--font-mono);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
}

.article-excerpt {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
  flex-grow: 1;
}

.read-more {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--color-accent-cyan);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition-bounce);
}

.read-more::after {
  content: "→";
  transition: transform 0.3s ease;
}

/* === PÁGINA DE ARTÍCULO === */
.article-page {
  padding: 4rem 0;
  background: var(--color-bg-primary);
}

.article-header {
  margin-bottom: 3rem;
  text-align: center;
  position: relative;
  padding: 2rem 0;
}

.article-header::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 3px;
  background: var(--color-gradient);
}

.article-header h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: var(--color-text-primary);
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
  animation: fade-in-up 0.8s ease-out;
}

.article-meta {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--color-accent-cyan);
  margin-bottom: 2rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-weight: 500;
}

.article-featured-image {
  width: 100%;
  max-width: 1200px;
  height: auto;
  margin: 0 auto 3rem;
  display: block;
  border-radius: 16px;
  box-shadow: var(--shadow-strong);
  transition: var(--transition-smooth);
  border: 2px solid var(--color-bg-tertiary);
  animation: fade-in-up 1s ease-out;
}

.article-featured-image:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-glow), var(--shadow-strong);
}

/* === ARTICLE CARD CONTENT AND IMAGE (for grid cards) === */
.article-card .article-image {
  width: 100%;
  overflow: hidden;
  position: relative;
  background: var(--color-bg-tertiary);
}

.article-card .article-image img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  display: block;
  transition: var(--transition-smooth);
  filter: grayscale(0%) brightness(0.95);
}

.article-card:hover .article-image img {
  transform: scale(1.1);
  filter: grayscale(0%) brightness(1.05);
}

.article-card .article-content {
  padding: 2rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 1;
  font-size: 1rem;
  line-height: 1.7;
  max-width: 100%;
  margin: 0;
}

.article-card .article-content h3 {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  margin-bottom: 1rem;
  color: var(--color-text-primary);
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.3;
  transition: var(--transition-smooth);
  padding: 0;
  margin-top: 0;
}

.article-card .article-content h3 a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-smooth);
}

.article-card:hover .article-content h3 a {
  color: var(--color-accent-secondary);
}

.article-card .article-content .article-excerpt {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.article-card .article-content .article-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-bg-tertiary);
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-top: auto;
}

.article-card .article-content .article-meta time {
  font-family: var(--font-mono);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.article-card .article-content .article-meta time::before {
  content: "📅";
  font-size: 0.9rem;
}

/* === ARTICLE CONTENT (for full article pages) === */
.article-content {
  font-size: 1.15rem;
  line-height: 1.9;
  max-width: 900px;
  margin: 0 auto;
  color: var(--color-text-primary);
}

.article-content h2 {
  margin-top: 3rem;
  margin-bottom: 1.5rem;
  color: var(--color-accent-primary);
  position: relative;
  padding-left: 4rem;
}

.article-content h2::before {
  content: "//";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-accent-cyan);
  font-family: var(--font-mono);
  font-size: 0.8em;
  line-height: 1.2;
}

.article-content h3 {
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  color: var(--color-accent-secondary);
}

.article-content ul,
.article-content ol {
  margin-left: 2.5rem;
  margin-bottom: 2rem;
}

.article-content li {
  margin-bottom: 0.8rem;
  padding-left: 0.5rem;
  color: var(--color-text-secondary);
  position: relative;
}

.article-content ul li::marker {
  color: var(--color-accent-primary);
  font-size: 1.2em;
}

.article-content blockquote {
  border-left: 4px solid var(--color-accent-primary);
  padding-left: 2rem;
  margin: 3rem 0;
  font-style: italic;
  color: var(--color-text-secondary);
  background: var(--color-bg-secondary);
  padding: 2rem;
  border-radius: 12px;
  position: relative;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
}

.article-content blockquote::before {
  content: '"';
  position: absolute;
  top: -20px;
  left: 20px;
  font-size: 4rem;
  color: var(--color-accent-primary);
  font-family: var(--font-display);
  line-height: 1;
  opacity: 0.3;
}

/* === BOTONES DE COMPARTIR === */
.share-buttons {
  display: flex;
  gap: 1.5rem;
  margin-top: 4rem;
  padding-top: 3rem;
  border-top: 2px solid var(--color-bg-tertiary);
  justify-content: center;
  flex-wrap: wrap;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 12px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition-bounce);
  text-decoration: none;
  position: relative;
  overflow: hidden;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.share-btn::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.share-btn:hover::before {
  width: 300px;
  height: 300px;
}

.share-btn-twitter {
  background: linear-gradient(135deg, #000000 0%, #1a1a1a 100%);
  color: white;
  border-color: #333;
}

.share-btn-twitter:hover {
  transform: translateY(-5px) scale(1.05);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  border-color: var(--color-accent-cyan);
}

.share-btn-facebook {
  background: linear-gradient(135deg, #1877f2 0%, #0d5dbf 100%);
  color: white;
  border-color: #1877f2;
}

.share-btn-facebook:hover {
  transform: translateY(-5px) scale(1.05);
  box-shadow: 0 10px 30px rgba(24, 119, 242, 0.4);
  border-color: #4a9eff;
}

.share-btn-threads {
  background: linear-gradient(135deg, #000000 0%, #333333 100%);
  color: white;
  border-color: #555;
}

.share-btn-threads:hover {
  transform: translateY(-5px) scale(1.05);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  border-color: #888;
}

.share-btn-bluesky {
  background: linear-gradient(135deg, #0085ff 0%, #0066cc 100%);
  color: white;
  border-color: #0085ff;
}

.share-btn-bluesky:hover {
  transform: translateY(-5px) scale(1.05);
  box-shadow: 0 10px 30px rgba(0, 133, 255, 0.4);
  border-color: #33a1ff;
}

.share-btn-whatsapp {
  background: linear-gradient(135deg, #25d366 0%, #1fa855 100%);
  color: white;
  border-color: #25d366;
}

.share-btn-whatsapp:hover {
  transform: translateY(-5px) scale(1.05);
  box-shadow: 0 10px 30px rgba(37, 211, 102, 0.4);
  border-color: var(--color-accent-secondary);
}

/* === PÁGINAS INSTITUCIONALES === */
.page-content {
  padding: 4rem 0;
  min-height: 70vh;
  background: var(--color-bg-primary);
}

.page-content h1 {
  margin-bottom: 3rem;
  text-align: center;
  animation: fade-in-up 0.8s ease-out;
}

.page-content h2 {
  margin-top: 2.5rem;
}

.page-content p {
  font-size: 1.15rem;
  line-height: 1.9;
  margin-bottom: 2rem;
  color: var(--color-text-primary);
}

.contact-email {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.3rem;
  color: var(--color-accent-cyan);
  display: inline-block;
  margin-top: 1.5rem;
  padding: 1rem 2rem;
  background: var(--color-bg-secondary);
  border: 2px solid var(--color-accent-cyan);
  border-radius: 12px;
  transition: var(--transition-bounce);
}

.contact-email:hover {
  transform: scale(1.05);
  background: var(--color-accent-cyan);
  color: var(--color-bg-primary);
  box-shadow: 0 10px 40px rgba(0, 255, 255, 0.3);
}

/* === FOOTER === */
footer {
  background: linear-gradient(
    180deg,
    var(--color-bg-secondary) 0%,
    var(--color-bg-primary) 100%
  );
  color: var(--color-text-primary);
  padding: 4rem 0 2rem;
  margin-top: 6rem;
  border-top: 3px solid var(--color-accent-primary);
  position: relative;
}

footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 100%;
  background: linear-gradient(
    180deg,
    transparent 0%,
    rgba(6, 182, 212, 0.05) 100%
  );
  pointer-events: none;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  position: relative;
  z-index: 1;
  margin-bottom: 3rem;
}

.footer-section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-section h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent-primary);
  margin-bottom: 0.5rem;
  position: relative;
  display: inline-block;
}

.footer-section h3::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 50px;
  height: 3px;
  background: var(--color-gradient);
}

.footer-section p {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.footer-section ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.footer-section ul li {
  position: relative;
  padding-left: 1.5rem;
}

.footer-section ul li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--color-accent-primary);
  font-weight: bold;
  transition: var(--transition-smooth);
}

.footer-section ul li:hover::before {
  transform: translateX(5px);
}

.footer-section ul li a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: var(--transition-smooth);
  font-size: 0.95rem;
  display: inline-block;
}

.footer-section ul li a:hover {
  color: var(--color-accent-primary);
  transform: translateX(5px);
}

.footer-bottom {
  border-top: 2px solid var(--color-bg-tertiary);
  padding-top: 2rem;
  text-align: center;
  position: relative;
  z-index: 1;
}

.footer-bottom p {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.05em;
}

.footer-bottom p a {
  color: var(--color-accent-primary);
  text-decoration: none;
  transition: var(--transition-smooth);
}

.footer-bottom p a:hover {
  color: var(--color-accent-secondary);
  text-decoration: underline;
}

.social-links {
  display: flex;
  gap: 1rem;
  list-style: none;
  flex-wrap: wrap;
}

.social-links a {
  color: var(--color-text-primary);
  font-size: 1.8rem;
  transition: var(--transition-bounce);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 2px solid var(--color-bg-tertiary);
  position: relative;
  overflow: hidden;
}

.social-links a svg {
  width: 24px;
  height: 24px;
  position: relative;
  z-index: 1;
}

.social-links a::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: var(--color-gradient);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.4s ease, height 0.4s ease;
  z-index: 0;
}

.social-links a:hover {
  transform: translateY(-10px) rotate(360deg);
  border-color: var(--color-accent-primary);
  color: var(--color-bg-primary);
}

.social-links a:hover::before {
  width: 100%;
  height: 100%;
}

.footer-text {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  text-align: center;
  letter-spacing: 0.05em;
}

.footer-text a {
  color: var(--color-accent-primary);
  transition: var(--transition-smooth);
}

.footer-text a:hover {
  color: var(--color-accent-secondary);
}

/* === RESPONSIVE DESIGN === */
@media (max-width: 1024px) {
  :root {
    --font-size-base: 15px;
  }

  .articles-grid {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
  }

  .featured-card {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .featured-card:nth-child(even) {
    grid-template-columns: 1fr;
  }

  .featured-card:nth-child(even) .featured-image {
    order: 1;
  }

  .featured-card:nth-child(even) .featured-content {
    order: 2;
  }

  .featured-image {
    height: 300px;
  }

  .featured-content {
    padding: 2rem;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 14px;
  }

  body::before {
    opacity: 0.02;
  }

  .container,
  .container-narrow {
    padding: 0 1.5rem;
  }

  /* Mobile Menu Toggle visible */
  .mobile-menu-toggle {
    display: flex;
  }

  /* Header adjustments */
  .header-content {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: nowrap;
  }

  /* Hide search on very small screens, move to menu */
  .search-container {
    margin: 0;
    order: 2;
    max-width: 200px;
    flex: 1;
  }

  .logo {
    order: 1;
  }

  .mobile-menu-toggle {
    order: 3;
  }

  /* Mobile Navigation Slide-in */
  nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(10, 14, 39, 0.98);
    backdrop-filter: blur(20px);
    padding: 5rem 2rem 2rem;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    box-shadow: -5px 0 30px rgba(0, 0, 0, 0.5);
    overflow-y: auto;
    order: 4;
  }

  nav.active {
    right: 0;
  }

  nav ul {
    flex-direction: column;
    gap: 0;
    align-items: flex-start;
    flex-wrap: nowrap;
    justify-content: flex-start;
  }

  nav ul li {
    width: 100%;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  nav ul li a {
    display: block;
    width: 100%;
    padding: 1.2rem 0;
    font-size: 1rem;
    letter-spacing: 0.05em;
    border-radius: 0;
  }

  nav ul li a::before {
    display: none;
  }

  nav ul li a:hover {
    transform: translateX(10px);
    padding-left: 10px;
  }

  /* Overlay when menu is open */
  body::after {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s ease;
    z-index: 999;
    pointer-events: none;
  }

  body.menu-open::after {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  body.menu-open {
    overflow: hidden;
  }

  .hero {
    padding: clamp(3rem, 10vh, 5rem) 0;
  }

  .hero h1 {
    margin-bottom: 1.5rem;
  }

  .section-title::before {
    left: -30px;
    font-size: 0.9rem;
  }

  .articles-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .article-card {
    transform: none !important;
  }

  .article-card:hover {
    transform: translateY(-10px) !important;
  }

  .article-card img {
    height: 200px;
  }

  .article-card .article-content {
    padding: 1.5rem;
  }

  .article-content {
    font-size: 1.05rem;
  }

  .share-buttons {
    flex-direction: column;
    gap: 1rem;
  }

  .share-btn {
    width: 100%;
    justify-content: center;
  }

  .social-links {
    gap: 1.5rem;
  }

  .social-links a {
    width: 45px;
    height: 45px;
    font-size: 1.5rem;
  }

  .social-links a svg {
    width: 20px;
    height: 20px;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .featured-section {
    padding: 3rem 0;
  }

  .featured-content h3 {
    font-size: 1.5rem;
  }

  .featured-excerpt {
    font-size: 1rem;
  }

  .section-header {
    flex-direction: column;
    align-items: center;
  }

  .featured-controls {
    width: 100%;
    justify-content: center;
  }

  .load-more-btn {
    width: 100%;
    padding: 1rem 2rem;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 13px;
  }

  .container,
  .container-narrow {
    padding: 0 1rem;
  }

  .logo {
    font-size: 1.2rem;
  }

  /* Hide search on very small screens */
  .search-container {
    display: none;
  }

  .mobile-menu-toggle {
    order: 2;
  }

  /* Narrower menu on small screens */
  nav {
    width: 85%;
    max-width: 280px;
  }

  .hero {
    padding: 3rem 0;
  }

  .section-title::before {
    display: none;
  }

  .article-card-content {
    padding: 1.5rem;
  }

  .article-card .article-content {
    padding: 1.25rem;
  }

  .article-content h2::before {
    display: none;
  }

  .article-content ul,
  .article-content ol {
    margin-left: 1.5rem;
  }

  .share-btn {
    padding: 0.8rem 1.5rem;
    font-size: 0.85rem;
  }

  .social-links a {
    width: 40px;
    height: 40px;
    font-size: 1.3rem;
  }

  .social-links a svg {
    width: 18px;
    height: 18px;
  }

  .featured-content {
    padding: 1.5rem;
  }

  .featured-content h3 {
    font-size: 1.3rem;
  }

  .featured-excerpt {
    font-size: 0.95rem;
  }

  .footer-section h3 {
    font-size: 1.2rem;
  }
}

/* === ANIMACIONES DE SCROLL === */
@media (prefers-reduced-motion: no-preference) {
  .article-card,
  .article-header,
  .article-featured-image {
    opacity: 0;
    animation: fade-in-up 0.8s ease-out forwards;
  }

  .article-card {
    animation-delay: calc(var(--animation-order, 0) * 0.1s);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* === NAVEGACIÓN CREATIVA ENTRE ARTÍCULOS === */
.article-navigation {
  margin-top: 5rem;
  padding: 3rem 0;
  border-top: 2px solid var(--color-bg-tertiary);
  position: relative;
}

.article-navigation::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 100px;
  height: 2px;
  background: var(--color-gradient);
  animation: slide-line 3s ease-in-out infinite;
}

@keyframes slide-line {
  0%,
  100% {
    transform: translateX(0);
  }
  50% {
    transform: translateX(calc(100vw - 100px));
  }
}

.nav-title {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-accent-cyan);
  text-align: center;
  margin-bottom: 2rem;
  position: relative;
}

.nav-title::before,
.nav-title::after {
  content: "//";
  position: absolute;
  color: var(--color-accent-primary);
  animation: blink 1.5s step-end infinite;
}

.nav-title::before {
  left: -40px;
}

.nav-title::after {
  right: -40px;
}

.article-nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  perspective: 1000px;
}

.nav-article-card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-bg-tertiary);
  border-radius: 16px;
  padding: 2rem;
  position: relative;
  overflow: hidden;
  transition: var(--transition-smooth);
  cursor: pointer;
  transform-style: preserve-3d;
}

.nav-article-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 51, 102, 0.1),
    transparent
  );
  transition: left 0.6s ease;
}

.nav-article-card:hover::before {
  left: 100%;
}

.nav-article-card:hover {
  transform: translateY(-10px) rotateX(5deg);
  border-color: var(--color-accent-primary);
  box-shadow: var(--shadow-glow), var(--shadow-strong);
}

.nav-card-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent-cyan);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-card-label::before {
  content: ">";
  color: var(--color-accent-primary);
  font-size: 1.2rem;
  animation: pulse-arrow 1s ease-in-out infinite;
}

@keyframes pulse-arrow {
  0%,
  100% {
    transform: translateX(0);
  }
  50% {
    transform: translateX(5px);
  }
}

.nav-article-card h4 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 0.8rem;
  line-height: 1.3;
  transition: var(--transition-smooth);
}

.nav-article-card:hover h4 {
  color: var(--color-accent-secondary);
  transform: translateX(10px);
}

.nav-card-excerpt {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.nav-card-link {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition-bounce);
}

.nav-card-link::after {
  content: "→";
  transition: transform 0.3s ease;
}

.nav-article-card:hover .nav-card-link {
  gap: 1rem;
  color: var(--color-accent-secondary);
}

.nav-article-card:hover .nav-card-link::after {
  transform: translateX(10px);
}

/* Variante: navegación en línea */
.article-nav-inline {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  margin-top: 4rem;
  padding: 2rem 0;
  border-top: 2px solid var(--color-bg-tertiary);
}

.nav-inline-btn {
  flex: 1;
  max-width: 400px;
  background: var(--color-bg-secondary);
  border: 2px solid var(--color-bg-tertiary);
  border-radius: 16px;
  padding: 2rem;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
  text-align: left;
}

.nav-inline-btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-gradient);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.nav-inline-btn:hover {
  border-color: var(--color-accent-primary);
  transform: translateX(0) scale(1.05);
  box-shadow: var(--shadow-glow);
}

.nav-inline-btn:hover::before {
  opacity: 0.1;
}

.nav-inline-btn.prev:hover {
  transform: translateX(-10px) scale(1.05);
}

.nav-inline-btn.next {
  text-align: right;
}

.nav-inline-btn.next:hover {
  transform: translateX(10px) scale(1.05);
}

.nav-inline-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent-cyan);
  margin-bottom: 0.8rem;
  display: block;
  position: relative;
  z-index: 1;
}

.nav-inline-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text-primary);
  transition: var(--transition-smooth);
  position: relative;
  z-index: 1;
  line-height: 1.3;
}

.nav-inline-btn:hover .nav-inline-title {
  color: var(--color-accent-secondary);
}

/* Responsive para navegación */
@media (max-width: 768px) {
  .article-nav-grid {
    grid-template-columns: 1fr;
  }

  .article-nav-inline {
    flex-direction: column;
    gap: 1.5rem;
  }

  .nav-inline-btn {
    max-width: 100%;
    text-align: left !important;
  }

  .nav-inline-btn.prev:hover,
  .nav-inline-btn.next:hover {
    transform: translateY(-5px) scale(1.02);
  }

  .nav-title::before,
  .nav-title::after {
    display: none;
  }

  .article-navigation::before {
    animation: none;
    width: 50px;
  }
}

/* === SCROLL TO TOP BUTTON === */
.scroll-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: var(--color-gradient);
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--color-bg-primary);
  cursor: pointer;
  transition: var(--transition-bounce);
  opacity: 0;
  visibility: hidden;
  z-index: 999;
  box-shadow: var(--shadow-strong);
}

.scroll-to-top.visible {
  opacity: 1;
  visibility: visible;
  animation: bounce-in 0.5s ease-out;
}

@keyframes bounce-in {
  0% {
    transform: translateY(100px) scale(0);
  }
  50% {
    transform: translateY(-10px) scale(1.1);
  }
  100% {
    transform: translateY(0) scale(1);
  }
}

.scroll-to-top:hover {
  transform: translateY(-10px) scale(1.15);
  box-shadow: var(--shadow-glow), var(--shadow-strong);
}

.scroll-to-top::before {
  content: "↑";
  font-weight: bold;
}

@media (max-width: 768px) {
  .scroll-to-top {
    bottom: 20px;
    right: 20px;
    width: 45px;
    height: 45px;
  }
}