/* ===== VARIABLES CSS ===== */
:root {
  /* Colores principales */
  --primary-color: #6366f1;
  --secondary-color: #8b5cf6;
  --accent-color: #06d6a0;
  --warning-color: #ffd60a;
  --danger-color: #ef476f;
  --success-color: #06ffa5;
  
  /* Gradientes */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-warm: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
  --gradient-cool: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
  --gradient-neon: linear-gradient(135deg, #d299c2 0%, #fef9d7 100%);
  
  /* Colores de fondo */
  --bg-primary: #0f0f23;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #16213e;
  --bg-card: rgba(255, 255, 255, 0.05);
  --bg-glass: rgba(255, 255, 255, 0.1);
  
  /* Colores de texto */
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --text-muted: #666666;
  
  /* Sombras */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.3);
  --shadow-neon: 0 0 20px rgba(99, 102, 241, 0.4);
  
  /* Transiciones */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Espaciado */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Tipografía */
  --font-family: 'Poppins', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3rem;
  
  /* Border radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
}

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

html {
  scroll-behavior: smooth;
}

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

/* ===== PARTÍCULAS DE FONDO ===== */
#particles-js {
  position: fixed;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: -1;
  background: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 50%, #16213e 100%);
}

/* ===== NAVEGACIÓN ===== */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(15, 15, 35, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 1000;
  transition: var(--transition-normal);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
}

.nav-logo i {
  color: var(--primary-color);
  animation: rocket-float 2s ease-in-out infinite;
}

@keyframes rocket-float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-5px); }
}

.nav-menu {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-glass);
  transform: translateY(-2px);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: var(--transition-fast);
  transform: translateX(-50%);
}

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

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  transition: var(--transition-fast);
  border-radius: var(--radius-sm);
}

/* ===== HERO SECTION ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--spacing-2xl) var(--spacing-md);
  position: relative;
  overflow: hidden;
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
}

.highlight {
  color: var(--accent-color);
  display: block;
  animation: glow-pulse 2s ease-in-out infinite;
}

@keyframes glow-pulse {
  0%, 100% { text-shadow: 0 0 20px rgba(6, 214, 160, 0.5); }
  50% { text-shadow: 0 0 30px rgba(6, 214, 160, 0.8); }
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.8;
}

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

.btn {
  padding: var(--spacing-md) var(--spacing-xl);
  border: none;
  border-radius: var(--radius-xl);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-normal);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: var(--transition-slow);
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--text-primary);
  box-shadow: var(--shadow-neon);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--primary-color);
}

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

/* ===== HERO VISUAL ===== */
.hero-visual {
  position: relative;
  height: 500px;
}

.floating-icons {
  position: relative;
  width: 100%;
  height: 100%;
}

.icon-item {
  position: absolute;
  font-size: 3rem;
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--spacing-sm);
  cursor: pointer;
  transition: var(--transition-normal);
  animation: float 6s ease-in-out infinite;
}

.icon-item:nth-child(1) {
  top: 10%;
  left: 20%;
  animation-delay: 0s;
}

.icon-item:nth-child(2) {
  top: 30%;
  right: 10%;
  animation-delay: 1s;
}

.icon-item:nth-child(3) {
  top: 60%;
  left: 10%;
  animation-delay: 2s;
}

.icon-item:nth-child(4) {
  bottom: 20%;
  right: 30%;
  animation-delay: 3s;
}

.icon-item:nth-child(5) {
  top: 20%;
  left: 50%;
  animation-delay: 4s;
}

.icon-item:nth-child(6) {
  bottom: 10%;
  left: 40%;
  animation-delay: 5s;
}

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  33% { transform: translateY(-20px) rotate(5deg); }
  66% { transform: translateY(10px) rotate(-5deg); }
}

.icon-item:hover {
  transform: scale(1.2) rotate(10deg);
  background: var(--gradient-accent);
  box-shadow: var(--shadow-xl);
}

.icon-item::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: -40px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-fast);
}

.icon-item:hover::after {
  opacity: 1;
}

/* ===== PROGRESS BAR ===== */
.progress-container {
  position: fixed;
  top: 70px;
  left: 0;
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  z-index: 999;
}

.progress-bar {
  height: 100%;
  background: var(--gradient-primary);
  width: 0%;
  transition: width 0.3s ease;
}

.progress-text {
  position: fixed;
  top: 80px;
  right: var(--spacing-md);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  z-index: 999;
  display: flex;
  gap: var(--spacing-sm);
}

/* ===== SECTIONS ===== */
.section {
  padding: var(--spacing-2xl) var(--spacing-md);
  position: relative;
}

.alt-bg {
  background: rgba(255, 255, 255, 0.02);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.section-title i {
  color: var(--primary-color);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== CARDS GRID ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.concept-card {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  transition: var(--transition-normal);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.concept-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: var(--transition-normal);
}

.concept-card:hover::before {
  transform: scaleX(1);
}

.concept-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(99, 102, 241, 0.3);
}

.card-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  animation: bounce 2s ease-in-out infinite;
}

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

.concept-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.concept-card p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

.card-stats {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.difficulty {
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
}

.difficulty.easy {
  background: rgba(6, 214, 160, 0.2);
  color: var(--accent-color);
}

.difficulty.medium {
  background: rgba(255, 214, 10, 0.2);
  color: var(--warning-color);
}

.difficulty.hard {
  background: rgba(239, 71, 111, 0.2);
  color: var(--danger-color);
}

.time {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
}

.card-btn {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: transparent;
  border: 2px solid var(--primary-color);
  border-radius: var(--radius-md);
  color: var(--primary-color);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
}

.card-btn:hover {
  background: var(--primary-color);
  color: var(--text-primary);
  transform: translateY(-2px);
}

/* ===== COMPONENTS GRID ===== */
.components-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
}

.component-card {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

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

.component-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  display: block;
}

.component-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.component-card p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.component-visual {
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.dns-demo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
}

.domain {
  background: var(--gradient-primary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
}

.ip {
  background: var(--gradient-accent);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
}

.load-balancer-demo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.requests {
  font-size: 1.5rem;
}

.balancer {
  font-size: 2rem;
  animation: balance 2s ease-in-out infinite;
}

@keyframes balance {
  0%, 100% { transform: rotate(0deg); }
  50% { transform: rotate(10deg); }
}

.servers {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.server {
  font-size: 1.2rem;
  opacity: 0.7;
  transition: var(--transition-fast);
}

.server:hover {
  opacity: 1;
  transform: scale(1.1);
}

.cache-demo {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.cache-layer {
  background: var(--gradient-accent);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  text-align: center;
}

.database-layer {
  background: var(--gradient-secondary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  text-align: center;
  opacity: 0.7;
}

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

.user {
  font-size: 1.5rem;
}

.cdn-nodes {
  display: flex;
  gap: var(--spacing-xs);
}

.node {
  font-size: 1.2rem;
  opacity: 0.5;
  transition: var(--transition-fast);
}

.node.active {
  opacity: 1;
  animation: pulse 1s ease-in-out infinite;
}

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

.database-demo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  justify-content: center;
}

.sql, .nosql {
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
}

.sql {
  background: var(--gradient-primary);
}

.nosql {
  background: var(--gradient-secondary);
}

.vs {
  color: var(--text-secondary);
  font-weight: 600;
}

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

.producer, .consumer {
  font-size: 1.5rem;
}

.queue {
  font-size: 1.2rem;
  animation: queue-flow 2s ease-in-out infinite;
}

@keyframes queue-flow {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.component-btn {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--gradient-primary);
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.component-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ===== CASE STUDIES ===== */
.case-studies-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--spacing-xl);
}

.case-study-card {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

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

.case-header {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.case-icon {
  font-size: 2.5rem;
  flex-shrink: 0;
}

.case-info h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.case-info p {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

.case-stats {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  margin-left: auto;
}

.users, .tweets, .pastes, .crawl, .growth {
  font-size: var(--font-size-xs);
  background: rgba(255, 255, 255, 0.1);
  padding: var(--spacing-xs);
  border-radius: var(--radius-sm);
  text-align: center;
  white-space: nowrap;
}

.case-preview {
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.twitter-flow, .pastebin-flow, .crawler-flow, .scaling-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.step {
  background: var(--gradient-primary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  white-space: nowrap;
}

.arrow {
  color: var(--text-secondary);
  font-weight: bold;
}

.case-challenges {
  display: flex;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
}

.challenge {
  background: rgba(239, 71, 111, 0.2);
  color: var(--danger-color);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.case-btn {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--gradient-secondary);
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
}

.case-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ===== OOP SECTION ===== */
.oop-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
}

.oop-card {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

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

.oop-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  display: block;
}

.oop-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.oop-card p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.oop-visual {
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hash-demo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-sm);
}

.key, .value {
  background: var(--gradient-primary);
  padding: var(--spacing-xs);
  border-radius: var(--radius-sm);
}

.hash-func {
  background: var(--gradient-accent);
  padding: var(--spacing-xs);
  border-radius: var(--radius-sm);
}

.bucket {
  background: var(--gradient-secondary);
  padding: var(--spacing-xs);
  border-radius: var(--radius-sm);
}

.lru-demo {
  display: flex;
  gap: var(--spacing-xs);
}

.cache-item {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  font-weight: 600;
}

.cache-item.recent {
  background: var(--gradient-accent);
}

.cache-item.old {
  background: var(--gradient-secondary);
  opacity: 0.5;
}

.cache-item:not(.recent):not(.old) {
  background: rgba(255, 255, 255, 0.2);
}

.cards-demo {
  display: flex;
  gap: var(--spacing-xs);
}

.card {
  font-size: 2rem;
  transition: var(--transition-fast);
}

.card:hover {
  transform: scale(1.2);
}

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

.caller, .operator, .manager, .director {
  font-size: 1.5rem;
  transition: var(--transition-fast);
}

.caller:hover, .operator:hover, .manager:hover, .director:hover {
  transform: scale(1.2);
}

.parking-demo {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xs);
}

.spot {
  width: 40px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 1.2rem;
}

.spot.occupied {
  background: var(--gradient-secondary);
}

.spot.free {
  background: var(--gradient-accent);
}

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

.user, .message, .group {
  font-size: 1.5rem;
  transition: var(--transition-fast);
}

.user:hover, .message:hover, .group:hover {
  transform: scale(1.2);
}

.oop-complexity, .oop-features {
  display: flex;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
}

.complexity-item {
  background: rgba(6, 214, 160, 0.2);
  color: var(--accent-color);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.feature {
  background: rgba(139, 92, 246, 0.2);
  color: var(--secondary-color);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.oop-btn {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--gradient-warm);
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
}

.oop-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ===== PLAYGROUND ===== */
.playground-tabs {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
  justify-content: center;
  flex-wrap: wrap;
}

.tab-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.tab-btn.active, .tab-btn:hover {
  background: var(--gradient-primary);
  color: var(--text-primary);
  border-color: transparent;
}

.playground-content {
  position: relative;
}

.playground-panel {
  display: none;
}

.playground-panel.active {
  display: block;
}

/* System Builder */
.builder-container {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: var(--spacing-xl);
  min-height: 600px;
}

.components-palette {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--spacing-md);
}

.components-palette h3 {
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.palette-items {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.palette-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  cursor: grab;
  transition: var(--transition-fast);
}

.palette-item:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateX(5px);
}

.palette-item:active {
  cursor: grabbing;
}

.component-icon {
  font-size: 1.5rem;
}

.canvas-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.system-canvas {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 2px dashed rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-xl);
  min-height: 500px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.canvas-hint {
  color: var(--text-secondary);
  text-align: center;
  font-size: var(--font-size-lg);
}

.canvas-controls {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
}

.control-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--gradient-primary);
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.control-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Load Test */
.load-test-container {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: var(--spacing-xl);
}

.test-controls {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--spacing-md);
}

.test-controls h3 {
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.control-group {
  margin-bottom: var(--spacing-md);
}

.control-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
}

.control-group input[type="range"] {
  width: 100%;
  margin-bottom: var(--spacing-xs);
}

.test-btn {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--gradient-accent);
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
}

.test-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.test-results {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--spacing-md);
}

.chart-container {
  height: 300px;
  margin-bottom: var(--spacing-md);
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.metric {
  text-align: center;
  padding: var(--spacing-md);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
}

.metric-label {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

.metric-value {
  display: block;
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
}

/* Data Flow */
.data-flow-container {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--spacing-md);
}

.flow-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
}

.flow-controls h3 {
  margin: 0;
}

.flow-controls select {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--bg-secondary);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  color: var(--text-primary);
}

.flow-btn {
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--gradient-primary);
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.flow-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.flow-visualization {
  height: 400px;
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}

/* Quiz */
.quiz-container {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--spacing-md);
  max-width: 800px;
  margin: 0 auto;
}

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

.quiz-header h3 {
  margin: 0;
}

.progress-circle {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.quiz-content {
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}

/* ===== FOOTER ===== */
.footer {
  background: var(--bg-secondary);
  padding: var(--spacing-2xl) var(--spacing-md) var(--spacing-md);
  margin-top: var(--spacing-2xl);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
}

.footer-section h3, .footer-section h4 {
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.footer-section p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

.social-links {
  display: flex;
  gap: var(--spacing-sm);
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bg-glass);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
}

.social-links a:hover {
  background: var(--gradient-primary);
  color: var(--text-primary);
  transform: translateY(-2px);
}

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

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

.footer-section ul li a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
}

.footer-section ul li a:hover {
  color: var(--text-primary);
}

.contact-email {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
}

.contact-email:hover {
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-md);
  text-align: center;
  color: var(--text-secondary);
}

/* ===== MODAL ===== */
.modal {
  display: none;
  position: fixed;
  z-index: 2000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
}

.modal-content {
  background: var(--bg-secondary);
  margin: 5% auto;
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  width: 90%;
  max-width: 800px;
  max-height: 80vh;
  overflow-y: auto;
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.close {
  color: var(--text-secondary);
  float: right;
  font-size: 28px;
  font-weight: bold;
  cursor: pointer;
  transition: var(--transition-fast);
}

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

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  
  .hamburger {
    display: flex;
  }
  
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .floating-icons {
    display: none;
  }
  
  .cards-grid {
    grid-template-columns: 1fr;
  }
  
  .components-grid {
    grid-template-columns: 1fr;
  }
  
  .case-studies-grid {
    grid-template-columns: 1fr;
  }
  
  .oop-grid {
    grid-template-columns: 1fr;
  }
  
  .builder-container {
    grid-template-columns: 1fr;
  }
  
  .load-test-container {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .playground-tabs {
    flex-direction: column;
  }
  
  .case-header {
    flex-direction: column;
    text-align: center;
  }
  
  .case-stats {
    margin-left: 0;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: var(--font-size-2xl);
  }
  
  .section-title {
    font-size: var(--font-size-2xl);
  }
  
  .btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
  }
  
  .modal-content {
    margin: 10% auto;
    padding: var(--spacing-md);
    width: 95%;
  }
}

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

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Aplicar animaciones a elementos cuando entran en viewport */
.animate-on-scroll {
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
}

.animate-on-scroll.delay-1 {
  animation-delay: 0.1s;
}

.animate-on-scroll.delay-2 {
  animation-delay: 0.2s;
}

.animate-on-scroll.delay-3 {
  animation-delay: 0.3s;
}

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

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.hidden {
  display: none;
}

.visible {
  display: block;
}

.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.grid {
  display: grid;
}

.relative {
  position: relative;
}

.absolute {
  position: absolute;
}

.fixed {
  position: fixed;
}

.z-10 {
  z-index: 10;
}

.z-20 {
  z-index: 20;
}

.z-30 {
  z-index: 30;
}

.w-full {
  width: 100%;
}

.h-full {
  height: 100%;
}

.cursor-pointer {
  cursor: pointer;
}

.select-none {
  user-select: none;
}

.overflow-hidden {
  overflow: hidden;
}

.overflow-auto {
  overflow: auto;
}

/* ===== SCROLLBAR PERSONALIZADA ===== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gradient-secondary);
}

/* ===== SELECCIÓN DE TEXTO ===== */
::selection {
  background: var(--primary-color);
  color: var(--text-primary);
}

::-moz-selection {
  background: var(--primary-color);
  color: var(--text-primary);
}


/* ===== CANVAS ===== */
#canvas1 {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}
canvas {
  
  position: absolute;
  top: 0;
  left: 0;
}