:root {
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', monospace;
  
  /* Dark Theme Tokens (from official palette - SIN DEGRADADOS) */
  --bg-primary: #0f172a;           /* Base: #0F172A */
  --bg-secondary: #1e293b;         /* Panel: #1E293B */
  --bg-card: #1e293b;              /* Panel: #1E293B */
  --bg-card-hover: #334155;        /* Activo: #334155 */
  --border-color: #334155;         /* Borde: #334155 */
  --border-accent: #3b82f6;        /* Primario: #3B82F6 */
  
  --text-primary: #f8fafc;         /* Texto: #F8FAFC */
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --primary: #3b82f6;              /* Primario: #3B82F6 */
  --primary-hover: #2563eb;
  --primary-glow: rgba(59, 130, 246, 0.25);
  --accent: #334155;              /* Activo: #334155 */
  --accent-glow: rgba(51, 65, 85, 0.4);
  --warning: #f59e0b;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
  --shadow-glow: none;
}

[data-theme="light"] {
  /* Light Theme Tokens (from official palette) */
  --bg-primary: #f8f9fa;           /* Base: #F8F9FA */
  --bg-secondary: #ffffff;         /* Panel: #FFFFFF */
  --bg-card: #ffffff;              /* Panel: #FFFFFF */
  --bg-card-hover: #eff6ff;        /* Activo: #EFF6FF */
  --border-color: #e5e7eb;         /* Borde: #E5E7EB */
  --border-accent: #2563eb;        /* Primario: #2563EB */
  
  --text-primary: #111827;         /* Texto: #111827 */
  --text-secondary: #4b5563;
  --text-muted: #9ca3af;
  
  --primary: #2563eb;              /* Primario: #2563EB */
  --primary-hover: #1d4ed8;
  --primary-glow: rgba(37, 99, 235, 0.2);
  --accent: #eff6ff;              /* Activo: #EFF6FF */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

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

a {
  color: var(--primary);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header & Nav */
header.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background-color: rgba(10, 14, 23, 0.8);
  border-bottom: 1px solid var(--border-color);
}
[data-theme="light"] header.site-header {
  background-color: rgba(248, 250, 252, 0.85);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}
.brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  box-shadow: 0 2px 8px var(--primary-glow);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}
.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
}
.nav-links a:hover {
  color: var(--text-primary);
  text-decoration: none;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.lang-select {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.45rem 0.65rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  min-height: 42px;
  outline: none;
}
.lang-select:hover,
.lang-select:focus-visible {
  border-color: var(--primary);
}
.lang-select option {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

.theme-toggle-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.theme-toggle-btn:hover,
.theme-toggle-btn:focus-visible {
  border-color: var(--primary);
}

/* Skip to Content Link (Accessibility & SEO) */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--primary);
  color: #ffffff;
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  font-weight: 700;
  z-index: 999;
  text-decoration: none;
}
.skip-link:focus {
  top: 0.75rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.65rem 1.4rem;
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none !important;
}
.btn-primary {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 14px var(--primary-glow);
  border: 1px solid rgba(255, 255, 255, 0.2);
}
.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px var(--primary-glow);
}
.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}
.btn-secondary:hover {
  border-color: var(--primary);
  background: var(--bg-card-hover);
}

/* Hero Section */
.hero {
  padding: 4.5rem 0 3.5rem;
  position: relative;
  overflow: hidden;
}
.hero::before {
  display: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 3.5rem;
  position: relative;
  z-index: 1;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid var(--border-accent);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: 3.1rem;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}
.hero h1 span.highlight-text {
  color: var(--primary);
  background: none;
  -webkit-background-clip: unset;
  -webkit-text-fill-color: initial;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 540px;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.hero-badges {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}
.hero-badges span {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* Phone Showcase Frame */
.phone-mockup-wrap {
  display: flex;
  justify-content: center;
  position: relative;
}
.phone-mockup {
  width: 310px;
  border-radius: 38px;
  border: 8px solid #1f2937;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7), var(--shadow-glow);
  overflow: hidden;
  background: #000;
  position: relative;
}
[data-theme="light"] .phone-mockup {
  border-color: #cbd5e1;
}
.phone-mockup img {
  width: 100%;
  height: auto;
  display: block;
}

/* Engine Support Bar */
.engines-bar {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  background: rgba(17, 24, 39, 0.4);
}
.engines-title {
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
  font-weight: 600;
}
.engines-flex {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem;
  align-items: center;
}
.engine-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-secondary);
}
.engine-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--primary);
}
.engine-dot.green { background-color: var(--accent); }
.engine-dot.yellow { background-color: var(--warning); }
.engine-dot.purple { background-color: #a855f7; }

/* Features Grid */
.features-section {
  padding: 5rem 0;
}
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3.5rem;
}
.section-header h2 {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}
.section-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.75rem;
}
.feature-card {
  background: var(--bg-card);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  padding: 2rem;
  border-radius: 16px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
}
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  background: rgba(59, 130, 246, 0.15);
  color: var(--primary);
  margin-bottom: 1.25rem;
}
.feature-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.6rem;
  font-weight: 700;
}
.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.55;
}

/* Screenshots Gallery */
.gallery-section {
  padding: 5rem 0;
  background: rgba(17, 24, 39, 0.3);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}
.gallery-scroll {
  display: flex;
  gap: 1.5rem;
  overflow-x: auto;
  padding: 1.5rem 0 2rem;
  scrollbar-width: thin;
}
.gallery-item {
  flex: 0 0 250px;
  border-radius: 20px;
  overflow: hidden;
  border: 2px solid var(--border-color);
  box-shadow: var(--shadow-md);
  transition: transform 0.2s ease;
}
.gallery-item:hover {
  transform: scale(1.03);
  border-color: var(--primary);
}
.gallery-item img {
  width: 100%;
  display: block;
}

/* Security Callout Banner */
.security-banner {
  margin: 5rem auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 3rem;
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 2rem;
  align-items: center;
}
.security-icon {
  font-size: 3rem;
}
.security-content h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}
.security-content p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

/* Download CTA Banner */
.download-cta-section {
  padding: 2rem 0 4rem;
}
.download-cta-card {
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: 24px;
  padding: 3.5rem 2.5rem;
  text-align: center;
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.4), 0 0 25px var(--primary-glow);
  position: relative;
  overflow: hidden;
}
[data-theme="light"] .download-cta-card {
  background: var(--bg-secondary);
  box-shadow: 0 15px 30px -5px rgba(37, 99, 235, 0.12);
}
.download-cta-content {
  max-width: 680px;
  margin: 0 auto;
}
.download-cta-content h2 {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}
.download-cta-content p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.6;
}
.download-cta-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.75rem;
  flex-wrap: wrap;
}
.download-meta {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}
.download-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* FAQ Section */
.faq-section {
  padding: 4rem 0 6rem;
  max-width: 850px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--border-color);
  padding: 1.5rem 0;
}
.faq-item h3,
.faq-item h4 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.faq-item p {
  color: var(--text-secondary);
}

/* Legal Pages (Privacy & Terms) */
.legal-page {
  padding: 4rem 0 6rem;
}
.legal-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 3rem;
  max-width: 900px;
  margin: 0 auto;
}
.legal-card h1 {
  font-size: 2.4rem;
  margin-bottom: 0.5rem;
}
.legal-date {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}
.legal-card h2 {
  font-size: 1.4rem;
  margin: 2rem 0 0.75rem;
  color: var(--text-primary);
}
.legal-card p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}
.legal-card ul {
  margin-left: 1.5rem;
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
}
[dir="rtl"] .legal-card ul {
  margin-left: 0;
  margin-right: 1.5rem;
}
.legal-card li {
  margin-bottom: 0.4rem;
}

/* Footer */
footer.site-footer {
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
  padding: 3.5rem 0 2rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 2.5rem;
}
.footer-brand h3,
.footer-brand h4 {
  color: var(--text-primary);
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}
.footer-col h4,
.footer-col h5 {
  color: var(--text-primary);
  font-size: 0.95rem;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.footer-col ul {
  list-style: none;
}
.footer-col li {
  margin-bottom: 0.6rem;
}
.footer-col a {
  color: var(--text-secondary);
}
.footer-col a:hover {
  color: var(--primary);
}
.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Responsive */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-desc {
    margin: 0 auto 2rem;
  }
  .hero-cta {
    justify-content: center;
  }
  .hero-badges {
    justify-content: center;
    flex-wrap: wrap;
  }
  .nav-links {
    display: none;
  }
  .security-banner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 600px) {
  .nav-wrap {
    height: auto;
    padding: 0.75rem 0;
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  .nav-actions {
    gap: 0.5rem;
  }
  .nav-actions .btn {
    padding: 0.5rem 0.9rem;
    font-size: 0.85rem;
  }
  .hero h1 {
    font-size: 2.25rem;
  }
  .legal-card {
    padding: 1.75rem 1.25rem;
  }
}