/* ========================================
   VARIABLES GLOBALES
   ======================================== */
:root {
  /* Colores principales */
  --color-primary: #9333ea;
  --color-primary-hover: #7c3aed;
  --color-secondary: #ef4444;
  --color-accent: #3b82f6;
  
  /* Colores de fondo */
  --bg-dark: #0a0a0a;
  --bg-darker: #050505;
  --bg-card: #1a1a1a;
  --bg-card-hover: #252525;
  
  /* Colores de texto */
  --text-primary: #f5f5f5;
  --text-secondary: #a1a1a1;
  --text-muted: #737373;
  
  /* Espaciado */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Bordes */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  
  /* Sombras */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 20px rgba(147, 51, 234, 0.3);
  
  /* Transiciones */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Inter', sans-serif;
  background: var(--bg-darker);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Fondo con gradiente */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 20% 20%, rgba(147, 51, 234, 0.15) 0%, transparent 50%),
              radial-gradient(circle at 80% 80%, rgba(239, 68, 68, 0.1) 0%, transparent 50%);
  z-index: -1;
  pointer-events: none;
}

/* Canvas de p5.js */
#p5-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  opacity: 0.3;
}

/* ========================================
   TIPOGRAFÍA
   ======================================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: clamp(2rem, 5vw, 4rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
}

h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
}

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

a:hover {
  color: var(--color-primary-hover);
}

/* ========================================
   LAYOUT
   ======================================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

section {
  padding: var(--spacing-2xl) 0;
  position: relative;
}

/* ========================================
   NAVEGACIÓN
   ======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 1000;
  transition: transform var(--transition-normal);
}

.navbar.hidden {
  transform: translateY(-100%);
}

.navbar-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  max-width: 1400px;
  margin: 0 auto;
}

.navbar-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.navbar-menu {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.navbar-menu a {
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.navbar-menu a:hover {
  color: var(--text-primary);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  padding-top: 80px;
}

.hero-content {
  max-width: 800px;
  z-index: 10;
}

.hero-title {
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.8;
}

.hero-scroll-indicator {
  position: absolute;
  bottom: var(--spacing-xl);
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-muted);
  font-size: 0.875rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.hero-scroll-indicator:hover {
  color: var(--text-primary);
}

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

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

.text-gradient {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hidden {
  display: none !important;
}

.visible {
  display: block !important;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 768px) {
  .navbar-menu {
    gap: var(--spacing-sm);
    font-size: 0.875rem;
  }
  
  .cards-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  section {
    padding: var(--spacing-xl) 0;
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 2.5rem;
  }
}