/* Variables */
:root {
  --bg: #0f1016;
  --bg-card: #1a1b26;
  --bg-card-hover: #252636;
  --text: #e8e8ed;
  --text-muted: #9a9ab0;
  --accent: #f59e0b;
  --accent-hover: #fbbf24;
  --border: #2d2f3d;
  --radius: 12px;
  --font: 'DM Sans', system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 16, 22, 0.9);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav {
  display: flex;
  gap: 24px;
}

.nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}

.nav a:hover {
  color: var(--accent);
}

/* Hero */
.hero {
  padding: 80px 0 100px;
  text-align: center;
}

.hero-inner {
  max-width: 680px;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero-title .highlight {
  color: var(--accent);
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 36px;
  line-height: 1.6;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 28px;
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-icon {
  font-size: 1.2rem;
}

.btn-primary, .btn-hero {
  background: var(--accent);
  color: #0f1016;
}

.btn-primary:hover, .btn-hero:hover {
  background: var(--accent-hover);
  box-shadow: 0 8px 24px rgba(245, 158, 11, 0.35);
}

.btn-hero {
  font-size: 1.1rem;
  padding: 18px 32px;
}

/* Origen / Por qué nació */
.origen {
  padding: 60px 0 80px;
  background: var(--bg);
}

.origen-inner {
  max-width: 680px;
  margin: 0 auto;
}

.origen .section-title {
  margin-bottom: 28px;
}

.origen-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.origen-lead,
.origen-cta {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-muted);
}

.origen-lead {
  font-weight: 500;
  color: var(--text);
}

.origen-cta strong {
  color: var(--accent);
}

/* Ventajas */
.ventajas {
  padding: 60px 0 80px;
  background: var(--bg-card);
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 48px;
  letter-spacing: -0.02em;
}

.ventajas-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: background 0.2s, border-color 0.2s;
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(245, 158, 11, 0.3);
}

.card-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: 16px;
}

.card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text);
}

.card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Descargar */
.descargar {
  padding: 80px 0 100px;
  text-align: center;
}

.descargar-inner {
  max-width: 520px;
  margin: 0 auto;
}

.descargar .section-title {
  margin-bottom: 16px;
}

.descargar-text {
  color: var(--text-muted);
  margin-bottom: 28px;
  font-size: 1.05rem;
}

.btn-download {
  background: var(--accent);
  color: #0f1016;
  font-size: 1.1rem;
  padding: 20px 36px;
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.25);
}

.btn-download:hover {
  background: var(--accent-hover);
  box-shadow: 0 8px 28px rgba(245, 158, 11, 0.4);
}

.descargar-hint {
  margin-top: 20px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Footer */
.footer {
  padding: 24px 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

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

/* Responsive */
@media (max-width: 640px) {
  .nav {
    gap: 16px;
  }
  .hero {
    padding: 56px 0 72px;
  }
  .ventajas {
    padding: 40px 0 60px;
  }
  .descargar {
    padding: 56px 0 72px;
  }
}