:root {
  /* Brand Colors - Premium Dark & Vibrant */
  --bg-body: #0a0a0c;
  --bg-surface: #131316;
  --bg-surface-glass: rgba(19, 19, 22, 0.7);
  --primary: #6d28d9;
  /* Deep Purple */
  --primary-glow: #8b5cf6;
  --accent: #06b6d4;
  /* Cyan */
  --accent-glow: #22d3ee;
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --border-color: rgba(255, 255, 255, 0.1);
  --success: #10b981;
  /* Typography */
  --font-main: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Outfit', system-ui, -apple-system, sans-serif;
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 8rem;
  /* Components */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-glow: 0 0 20px rgba(109, 40, 217, 0.3);
}

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

html {
  scroll-behavior: smooth;
}

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

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

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  background: linear-gradient(135deg, #fff 0%, var(--text-muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
}

ul {
  list-style: none;
}

/* Layout */
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

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

/* Utilities */
.glass {
  background: var(--bg-surface-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.text-gradient {
  background: linear-gradient(135deg, var(--primary-glow) 0%, var(--accent-glow) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 50px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  font-family: var(--font-main);
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-glow) 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(109, 40, 217, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(109, 40, 217, 0.6);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-main);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--text-main);
}

.btn-glow {
  background: var(--accent);
  color: #000;
  box-shadow: 0 0 15px var(--accent-glow);
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: var(--spacing-sm) 0;
  transition: background 0.3s;
}

.site-header.scrolled {
  background: rgba(10, 10, 12, 0.8);
  backdrop-filter: blur(15px);
  border-bottom: 1px solid var(--border-color);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.nav-links a {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-main);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: var(--spacing-xl);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: radial-gradient(circle at 50% 10%, rgba(109, 40, 217, 0.15) 0%, transparent 60%);
}

.hero-content {
  max-width: 800px;
  position: relative;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: var(--spacing-md);
}

.hero-btns {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
}

/* Cards Grid */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
}

.card {
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  transition: transform 0.3s;
}

.card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-glow);
}

.card-icon {
  font-size: 2rem;
  margin-bottom: var(--spacing-sm);
  color: var(--accent);
}

/* Footer */
footer {
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-lg) 0;
  margin-top: var(--spacing-xl);
  color: var(--text-muted);
  text-align: center;
}

/* Mobile */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background: var(--bg-surface);
    flex-direction: column;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    transform: translateY(-150%);
    transition: transform 0.3s ease;
  }

  .nav-links.active {
    transform: translateY(0);
  }

  .mobile-toggle {
    display: block;
  }

  .site-header {
    height: 60px;
  }

  .logo img {
    max-height: 40px;
  }
}

/* Header layout */
.site-header {
  height: 72px;
  /* altura clara y controlada */
  display: flex;
  align-items: center;
}

/* Contenedor interno */
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  height: 100%;
}

/* Imagen del logo */
.logo img {
  height: 60%;
  max-height: 48px;
  width: auto;
}