/* ============================================================
   Estilos compartidos del sitio público (landing y páginas de comparativas):
   tokens claro y oscuro, base, navegación, hero, botones, cabeceras de sección,
   CTA, footer y animaciones de entrada. Lo específico de cada página va en su
   propio <style>.
   ============================================================ */


:root {
  --primary-50: #eef2ff;
  --primary-100: #e0e7ff;
  --primary-200: #c7d2fe;
  --primary-400: #818cf8;
  --primary-500: #6366f1;
  --primary-600: #4f46e5;
  --primary-700: #4338ca;
  --primary-800: #3730a3;
  --secondary: #ec4899;
  --bg: #ffffff;
  --bg-soft: #f9fafb;
  --bg-muted: #f3f4f6;
  --bg-card: #ffffff;
  --fg: #111827;
  --fg-secondary: #4b5563;
  --fg-muted: #6b7280;
  --border: #e5e7eb;
  --border-soft: #f3f4f6;
  --hero-gradient-start: #4f46e5;
  --hero-gradient-end: #6366f1;
  --hero-text: #ffffff;
  --hero-text-soft: rgba(255,255,255,0.85);
  --feature-icon-bg: #eef2ff;
  --feature-icon-fg: #4f46e5;
  --testimonial-bg: #ffffff;
  --testimonial-border: #e5e7eb;
  --cta-gradient-start: #4f46e5;
  --cta-gradient-end: #6366f1;
  --cta-text: #ffffff;
  --usecase-icon-1: linear-gradient(135deg, #4f46e5, #6366f1);
  --usecase-icon-2: linear-gradient(135deg, #0891b2, #06b6d4);
  --usecase-icon-3: linear-gradient(135deg, #d946ef, #ec4899);
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.04);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 999px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --nav-bg: rgba(255,255,255,0.92);
  --nav-border: rgba(229,231,235,0.8);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f0d1a;
    --bg-soft: #1a1726;
    --bg-muted: #252133;
    --bg-card: #1a1726;
    --fg: #f1f0f5;
    --fg-secondary: #b8b5c4;
    --fg-muted: #8b87a0;
    --border: #2e2a3d;
    --border-soft: #252133;
    --hero-gradient-start: #1e1b4b;
    --hero-gradient-end: #312e81;
    --hero-text: #f1f0f5;
    --hero-text-soft: rgba(241,240,245,0.8);
    --feature-icon-bg: #252133;
    --feature-icon-fg: #818cf8;
    --testimonial-bg: #1a1726;
    --testimonial-border: #2e2a3d;
    --cta-gradient-start: #312e81;
    --cta-gradient-end: #3730a3;
    --cta-text: #f1f0f5;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4), 0 2px 4px -2px rgba(0,0,0,0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.4), 0 4px 6px -4px rgba(0,0,0,0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.5), 0 8px 10px -6px rgba(0,0,0,0.3);
    --nav-bg: rgba(15,13,26,0.92);
    --nav-border: rgba(46,42,61,0.8);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #0f0d1a;
  --bg-soft: #1a1726;
  --bg-muted: #252133;
  --bg-card: #1a1726;
  --fg: #f1f0f5;
  --fg-secondary: #b8b5c4;
  --fg-muted: #8b87a0;
  --border: #2e2a3d;
  --border-soft: #252133;
  --hero-gradient-start: #1e1b4b;
  --hero-gradient-end: #312e81;
  --hero-text: #f1f0f5;
  --hero-text-soft: rgba(241,240,245,0.8);
  --feature-icon-bg: #252133;
  --feature-icon-fg: #818cf8;
  --testimonial-bg: #1a1726;
  --testimonial-border: #2e2a3d;
  --cta-gradient-start: #312e81;
  --cta-gradient-end: #3730a3;
  --cta-text: #f1f0f5;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4), 0 2px 4px -2px rgba(0,0,0,0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.4), 0 4px 6px -4px rgba(0,0,0,0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.5), 0 8px 10px -6px rgba(0,0,0,0.3);
  --nav-bg: rgba(15,13,26,0.92);
  --nav-border: rgba(46,42,61,0.8);
  color-scheme: dark;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

*, *::before, *::after { box-sizing: border-box; }

/* NAV */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--nav-border);
  padding: 0 16px;
  transition: box-shadow 0.3s;
}
.nav.scrolled { box-shadow: var(--shadow-md); }
.nav-inner {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--fg);
}
.nav-logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary-600), var(--primary-500));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 18px;
}
.nav-logo-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  text-decoration: none;
  color: var(--fg-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--fg); }
.nav-cta {
  background: var(--primary-600);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  font-weight: 600;
  transition: background 0.2s, transform 0.15s;
}
.nav-cta:hover { background: var(--primary-700); transform: translateY(-1px); }
.nav-mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--fg);
  cursor: pointer;
  padding: 8px;
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    padding: 16px 24px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
  }
  .nav-mobile-toggle { display: block; }
}

/* HERO */
.hero {
  background: linear-gradient(135deg, var(--hero-gradient-start), var(--hero-gradient-end));
  padding: calc(env(safe-area-inset-top, 0px) + 120px) 16px 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at 30% 20%, rgba(129,140,248,0.3) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 80%, rgba(99,102,241,0.25) 0%, transparent 50%);
  pointer-events: none;
}
.hero-inner {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.15);
  color: var(--hero-text);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 24px;
  letter-spacing: 0.02em;
}
.hero h1 {
  font-size: clamp(2.25rem, 5.5vw, 3.5rem);
  font-weight: 800;
  color: var(--hero-text);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin: 0 0 20px;
  text-wrap: balance;
}
.hero p {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--hero-text-soft);
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.6;
}
.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn-primary {
  background: #fff;
  color: var(--primary-700);
  padding: 14px 32px;
  border-radius: var(--radius-full);
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 14px rgba(0,0,0,0.15);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(0,0,0,0.2); }
.btn-secondary {
  background: rgba(255,255,255,0.12);
  color: var(--hero-text);
  padding: 14px 28px;
  border-radius: var(--radius-full);
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(255,255,255,0.25);
  transition: background 0.2s, transform 0.15s;
}
.btn-secondary:hover { background: rgba(255,255,255,0.2); transform: translateY(-1px); }


.section-inner {
  max-width: 1120px;
  margin: 0 auto;
}
.section-header {
  text-align: center;
  margin-bottom: 64px;
}
.section-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary-600);
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin: 0 0 16px;
  text-wrap: balance;
}
.section-subtitle {
  font-size: clamp(0.95rem, 1.8vw, 1.1rem);
  color: var(--fg-muted);
  max-width: 560px;
  margin: 0 auto;
}

/* CTA */
.cta {
  padding: 96px 16px;
  background: linear-gradient(135deg, var(--cta-gradient-start), var(--cta-gradient-end));
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(255,255,255,0.08) 0%, transparent 60%);
  pointer-events: none;
}
.cta-inner {
  max-width: 600px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.cta h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--cta-text);
  margin: 0 0 16px;
  letter-spacing: -0.03em;
  text-wrap: balance;
}
.cta p {
  font-size: clamp(0.95rem, 1.8vw, 1.1rem);
  color: rgba(255,255,255,0.8);
  margin: 0 0 36px;
}
.cta .btn-primary {
  font-size: 17px;
  padding: 16px 40px;
}

/* FOOTER */
.footer {
  padding: 48px 16px calc(env(safe-area-inset-bottom, 0px) + 48px);
  background: var(--bg);
  border-top: 1px solid var(--border);
}
.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-left {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--fg-muted);
  font-size: 14px;
}
.footer-logo-icon {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, var(--primary-600), var(--primary-500));
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 14px;
}
.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-links a {
  font-size: 13px;
  color: var(--fg-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--fg); }


/* Scroll offset for fixed nav */
section[id] { scroll-margin-top: 80px; }

/* Smooth scroll */
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

/* Animations */
@media (prefers-reduced-motion: no-preference) {
  .fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
  }
  .fade-in.visible {
    opacity: 1;
    transform: translateY(0);
  }
}
@media (prefers-reduced-motion: reduce) {
  .fade-in { opacity: 1; transform: none; }
}