/* ==========================================================================
   SIFEN ERP Bridge - Estilos Comerciales
   100% Autocontenido, Responsive y sin librerías externas
   ========================================================================== */

:root {
  /* Paleta alineada al panel /admin (Mamix): pasar del landing al panel
     tiene que sentirse como el mismo producto, no como dos marcas. */
  --primary: #546DFE;
  --primary-dark: #3B4FD8;
  --primary-light: #8FA0FE;
  --primary-subtle: #EFF2FF;
  --accent: #4257E0;
  --dark: #0f172a;
  --dark-surface: #1e293b;
  --dark-border: #334155;
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --white: #ffffff;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;
  --container-max: 1200px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--slate-50);
  color: var(--slate-800);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Tipografía */
h1, h2, h3, h4 {
  color: var(--dark);
  font-weight: 700;
  line-height: 1.25;
}

h1 { font-size: clamp(2.2rem, 4vw, 3.4rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.8rem, 3vw, 2.4rem); letter-spacing: -0.01em; margin-bottom: 0.75rem; }
h3 { font-size: 1.25rem; margin-bottom: 0.5rem; }
p { color: var(--slate-600); }

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover { color: var(--primary-dark); }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header & Navegación */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--slate-200);
  transition: all 0.3s ease;
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--dark);
}

.brand-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: var(--white);
  border-radius: var(--radius-sm);
}

.brand span {
  color: var(--primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--slate-700);
  font-weight: 500;
  font-size: 0.95rem;
}

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

.nav-cta {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
  text-align: center;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--white);
  box-shadow: 0 2px 4px rgba(59, 79, 216, 0.2);
}
.btn-primary:hover {
  background-color: var(--primary-dark);
  color: var(--white);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(59, 79, 216, 0.3);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--slate-300);
  color: var(--slate-700);
}
.btn-outline:hover {
  background-color: var(--slate-100);
  color: var(--dark);
  border-color: var(--slate-400);
}

.btn-dark {
  background-color: var(--dark);
  color: var(--white);
}
.btn-dark:hover {
  background-color: var(--slate-800);
  color: var(--white);
}

.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.85rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.825rem;
  font-weight: 600;
}

.badge-success {
  background-color: var(--primary-subtle);
  color: var(--primary-dark);
  border: 1px solid rgba(59, 79, 216, 0.2);
}

/* Hero Section */
.hero-section {
  padding: 5rem 0 4rem;
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle at top right, rgba(84, 109, 254, 0.08), transparent 50%),
              radial-gradient(circle at bottom left, rgba(59, 79, 216, 0.05), transparent 50%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.hero-description {
  font-size: 1.15rem;
  color: var(--slate-600);
  max-width: 38rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.5rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--slate-200);
}

.stat-item strong {
  display: block;
  font-size: 1.5rem;
  color: var(--dark);
  font-weight: 800;
}
.stat-item span {
  font-size: 0.85rem;
  color: var(--slate-600);
}

/* Code Preview Box in Hero */
.code-card {
  background-color: var(--slate-900);
  border-radius: var(--radius);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  border: 1px solid var(--dark-border);
}

.code-header {
  background-color: var(--slate-800);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--dark-border);
}

.code-dots {
  display: flex;
  gap: 0.4rem;
}
.code-dots span {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
}
.dot-red { background-color: #ef4444; }
.dot-yellow { background-color: #f59e0b; }
.dot-green { background-color: #10b981; }

.code-title {
  color: var(--slate-300);
  font-size: 0.8rem;
  font-family: var(--font-mono);
}

.code-tabs {
  display: flex;
  background-color: #0b1120;
  padding: 0.25rem 0.5rem;
  gap: 0.25rem;
}

.code-tab-btn {
  background: transparent;
  border: none;
  color: var(--slate-400);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
}

.code-tab-btn.active {
  background-color: var(--slate-800);
  color: var(--primary-light);
  font-weight: 600;
}

.code-body {
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.825rem;
  color: #e2e8f0;
  overflow-x: auto;
  line-height: 1.5;
}

.code-body pre {
  margin: 0;
}

.json-key { color: #38bdf8; }
.json-string { color: #a3e635; }
.json-number { color: #f472b6; }
.json-boolean { color: #fb923c; }
.json-comment { color: #94a3b8; font-style: italic; }

/* Secciones Generales */
.section {
  padding: 5.5rem 0;
}

.section-alt {
  background-color: var(--white);
  border-top: 1px solid var(--slate-200);
  border-bottom: 1px solid var(--slate-200);
}

.section-header {
  text-align: center;
  max-width: 44rem;
  margin: 0 auto 4rem;
}

.section-header p {
  font-size: 1.1rem;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.feature-card {
  background-color: var(--white);
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--slate-200);
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.feature-icon {
  width: 3.25rem;
  height: 3.25rem;
  background-color: var(--primary-subtle);
  color: var(--primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-card h3 {
  color: var(--dark);
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--slate-600);
}

/* Comparativa Directo vs Middleware */
.comparison-section {
  background-color: var(--slate-900);
  color: var(--white);
}

.comparison-section h2, .comparison-section p {
  color: var(--white);
}
.comparison-section .section-header p {
  color: var(--slate-400);
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.comparison-card {
  padding: 2.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--dark-border);
}

.card-pain {
  background-color: rgba(239, 68, 68, 0.05);
  border-color: rgba(239, 68, 68, 0.2);
}

.card-gain {
  background-color: rgba(84, 109, 254, 0.08);
  border-color: rgba(84, 109, 254, 0.3);
}

.comparison-list {
  list-style: none;
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.comparison-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.95rem;
}

.icon-bad {
  color: #f87171;
  flex-shrink: 0;
  margin-top: 0.2rem;
}

.icon-good {
  color: #34d399;
  flex-shrink: 0;
  margin-top: 0.2rem;
}

/* Pasos / Cómo funciona */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  position: relative;
}

.step-card {
  background-color: var(--white);
  padding: 2.25rem 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--slate-200);
  box-shadow: var(--shadow-sm);
  position: relative;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background-color: var(--primary);
  color: var(--white);
  font-weight: 800;
  border-radius: 50%;
  margin-bottom: 1.25rem;
}

.step-card h3 {
  margin-bottom: 0.75rem;
}

/* Pricing Section */
.pricing-header-note {
  margin-top: 0.75rem;
  display: inline-block;
  font-size: 0.85rem;
  background-color: var(--slate-100);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  color: var(--slate-700);
  font-weight: 500;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  align-items: stretch;
}

.pricing-card {
  background-color: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius);
  padding: 2.25rem 1.75rem;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: all 0.25s ease;
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
  border: 2px solid var(--primary);
  box-shadow: var(--shadow-lg);
}

.featured-ribbon {
  position: absolute;
  top: -0.85rem;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--primary);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.85rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.plan-name {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--dark);
}

.plan-desc {
  font-size: 0.85rem;
  color: var(--slate-600);
  min-height: 2.5rem;
  margin-top: 0.25rem;
}

.plan-price {
  margin: 1.5rem 0;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--slate-200);
}

.price-amount {
  font-size: 2rem;
  font-weight: 800;
  color: var(--dark);
}

.price-currency {
  font-size: 1.25rem;
  font-weight: 700;
  margin-right: 0.15rem;
}

.price-period {
  font-size: 0.85rem;
  color: var(--slate-600);
}

.plan-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--slate-700);
}

.check-icon {
  color: var(--primary);
  flex-shrink: 0;
}

.pricing-footnote {
  text-align: center;
  margin-top: 2.5rem;
  font-size: 0.85rem;
  color: var(--slate-600);
}

/* FAQ Section */
.faq-grid {
  max-width: 48rem;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background-color: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: all 0.2s ease;
}

.faq-item.active {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  padding: 1.25rem 1.5rem;
  text-align: left;
  background: transparent;
  border: none;
  font-weight: 700;
  font-size: 1rem;
  color: var(--dark);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-toggle {
  font-size: 1.25rem;
  color: var(--slate-400);
  transition: transform 0.2s ease;
}

.faq-item.active .faq-toggle {
  transform: rotate(45deg);
  color: var(--primary);
}

.faq-answer {
  padding: 0 1.5rem 1.25rem;
  font-size: 0.95rem;
  color: var(--slate-600);
  line-height: 1.6;
  display: none;
}

.faq-item.active .faq-answer {
  display: block;
}

/* Banner CTA Final */
.cta-banner {
  background: linear-gradient(135deg, var(--slate-900), var(--primary-dark));
  color: var(--white);
  border-radius: var(--radius-lg);
  padding: 4rem 2.5rem;
  text-align: center;
  box-shadow: var(--shadow-xl);
  margin-bottom: 4rem;
}

.cta-banner h2 {
  color: var(--white);
  margin-bottom: 1rem;
}

.cta-banner p {
  color: var(--slate-200);
  max-width: 36rem;
  margin: 0 auto 2rem;
  font-size: 1.1rem;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Footer */
.site-footer {
  background-color: var(--slate-900);
  color: var(--slate-400);
  padding: 4rem 0 2rem;
  border-top: 1px solid var(--dark-border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand h4 {
  color: var(--white);
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
}

.footer-col h5 {
  color: var(--white);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-links a {
  color: var(--slate-400);
  font-size: 0.875rem;
}
.footer-links a:hover {
  color: var(--white);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--dark-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

/* Modal de Contacto */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
  padding: 1.5rem;
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal-box {
  background-color: var(--white);
  border-radius: var(--radius);
  max-width: 32rem;
  width: 100%;
  padding: 2.25rem;
  position: relative;
  box-shadow: var(--shadow-xl);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: transparent;
  border: none;
  font-size: 1.5rem;
  color: var(--slate-400);
  cursor: pointer;
}

/* Responsividad */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .comparison-grid {
    grid-template-columns: 1fr;
  }
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
  }
  .hero-stats {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

/* ==========================================================================
   Agregados 2026-09-05: menú móvil, CTA sobre fondo oscuro y precio a consultar
   ========================================================================== */

/* Hamburguesa: oculta en desktop, visible donde .nav-links desaparece. */
.nav-burger {
  display: none;
  background: none;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.55rem;
  color: var(--slate-700);
  cursor: pointer;
}

@media (max-width: 640px) {
  .nav-burger { display: inline-flex; align-items: center; }

  /* El menú vuelve a existir en móvil, como panel desplegable. */
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--slate-200);
    box-shadow: var(--shadow-lg);
    padding: 0.75rem 1.25rem;
    gap: 0.75rem;
    z-index: 50;
  }

  .site-header .nav-wrap { position: relative; }
}

/* Botón outline sobre el banner oscuro: legible también en hover. */
.btn-outline-invert {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.4);
}

.btn-outline-invert:hover {
  color: var(--white);
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.7);
}

/* Precio «a consultar»: mismo peso visual sin inventar un número. */
.plan-consultar {
  font-size: 1.6rem;
}

/* La vida de una factura (hero): reemplaza a la tarjeta de código JSON.
   Le habla al comerciante, no al programador — y no regala el cómo. */
.demo-card {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
}

.demo-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  border-bottom: 1px solid var(--slate-200);
  background: var(--slate-50);
}

.demo-titulo { font-weight: 800; color: var(--dark); }
.demo-sub { font-size: 0.85rem; color: var(--slate-600); }

.demo-badge {
  background: var(--primary-subtle);
  color: var(--primary-dark);
  border: 1px solid rgba(84, 109, 254, 0.35);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.35rem 0.8rem;
  white-space: nowrap;
}

.demo-timeline {
  list-style: none;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.demo-timeline li {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
}

.demo-timeline strong { display: block; color: var(--dark); font-size: 0.95rem; }
.demo-timeline span { font-size: 0.83rem; color: var(--slate-600); }

.demo-check {
  flex: none;
  width: 1.7rem;
  height: 1.7rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--primary-subtle);
  color: var(--primary-dark);
  font-weight: 800;
  font-size: 0.9rem;
}

.demo-check-mail { background: var(--primary); color: var(--white); }

.demo-footer {
  padding: 0.9rem 1.25rem;
  border-top: 1px solid var(--slate-200);
  font-size: 0.85rem;
  color: var(--slate-600);
  background: var(--slate-50);
}