/* =============================================
   CADIA — Automatizaciones con IA
   Mobile-first · Todo oscuro
   ============================================= */

/* ─── Google Fonts ───────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

/* ─── Variables del sistema ──────────────────── */
:root {
  /* Paleta base */
  --accent: #b5122d;
  --accent-dark: #b5122d;
  --accent-glow: rgba(181, 18, 45, 0.28);

  /* Tipografía */
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-h2: clamp(2rem, 4.5vw, 2.75rem);
  --text-hero: clamp(2.5rem, 7vw, 4.25rem);

  /* Layout */
  --max-width: 900px;
  --gutter: 1.5rem;
  --radius: 0.75rem;
  --nav-h: 64px;
  --section-py: clamp(68px, 8.5vw, 102px);
  /* −15% */
  --t: 0.22s ease;
}

/* ─── Tokens de sección oscura (principal) ───── */
.s-dark {
  --bg-section: #0a0a0a;
  --surface-card: #1a1a1a;
  --border-color: rgba(255, 255, 255, 0.08);
  --color-text: #ffffff;
  --color-muted: #cccccc;
  --color-faint: #888888;
  background-color: var(--bg-section);
  color: var(--color-text);
}

/* ─── Tokens de sección alterna (también oscura) */
.s-light {
  --bg-section: #111111;
  --surface-card: #1e1e1e;
  --border-color: rgba(255, 255, 255, 0.08);
  --color-text: #ffffff;
  --color-muted: #cccccc;
  --color-faint: #888888;
  background-color: var(--bg-section);
  color: var(--color-text);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
}

body {
  font-family: var(--font);
  background: #0a0a0a;
  color: #ffffff;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ─── Contenedor ─────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ─── Rejilla CAD en secciones oscuras ───────── */
/* Se aplica vía ::before para no interferir con el contenido */
.s-dark {
  position: relative;
}

.s-dark::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

/* El hero tiene su propia capa de glow encima de la rejilla */
#hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 65% 45% at 50% 0%,
      rgba(181, 18, 45, 0.13),
      transparent 65%);
  pointer-events: none;
  z-index: 0;
}

/* El contenido debe quedar por encima de la rejilla */
.s-dark>.container,
.s-dark>*>.container,
.hero__content,
.cta__inner,
.chatbot__inner {
  position: relative;
  z-index: 1;
}

/* ─── Navbar fija ────────────────────────────── */
nav {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 200;
  height: var(--nav-h);
  background: rgba(15, 17, 21, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.nav__inner {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.nav__logo-img {
  height: 32px;
  width: auto;
  display: block;
}

/* ─── Botón CTA ──────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 48px;
  padding: 0 1.75rem;
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: var(--text-base);
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  border: none;
  transition: background var(--t), transform var(--t), box-shadow var(--t);
  white-space: nowrap;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px var(--accent-glow);
}

.btn--primary:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn--sm {
  min-height: 40px;
  padding: 0 1.1rem;
  font-size: var(--text-sm);
}

.btn--lg {
  min-height: 56px;
  padding: 0 2.5rem;
  font-size: var(--text-lg);
  border-radius: calc(var(--radius) * 1.25);
}

.btn--full {
  width: 100%;
}

/* ─── Secciones: espacio y tipografía ───────────── */
section {
  padding-block: var(--section-py);
}

#hero {
  padding-block-start: calc(var(--nav-h) + clamp(60px, 8vw, 100px));
}

section h2,
section h3 {
  font-size: var(--text-h2);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.025em;
  margin-bottom: 2.5rem;
  color: #ffffff;
}

section h3 {
  font-size: var(--text-xl, 1.25rem);
  margin-bottom: 1rem;
}

section p,
section li {
  color: #cccccc;
}

/* Párrafo de cierre — frase de impacto en acento */
.section-close {
  margin-top: 2rem;
  font-size: var(--text-lg) !important;
  font-weight: 600 !important;
  color: var(--accent) !important;
}

/* ─── Hero ───────────────────────────────────── */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  text-align: center;
  overflow: hidden;
}

.hero__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  padding-block: 2rem;
}

.hero__title {
  font-size: clamp(1.46rem, 3.9vw, 2.44rem);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.025em;
  max-width: 680px;
  color: #f2f2f4;
}

@media (max-width: 480px) {
  .hero__title {
    font-size: clamp(1.3rem, 4.55vw, 1.625rem);
    line-height: 1.28;
    letter-spacing: -0.018em;
  }
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: #8a8a9a;
  max-width: 480px;
  line-height: 1.7;
}

.hero__reinforce {
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  color: #6a6a7a;
  font-style: italic;
  letter-spacing: 0.01em;
}

/* ─── Listas con flecha → ────────────────────── */
.arrow-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.arrow-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  padding: 1rem 1.25rem;
  background: var(--surface-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.55;
  transition: border-color var(--t);
}

.arrow-list li:hover {
  border-color: var(--accent);
}

.arrow-list li::before {
  content: '→';
  color: var(--accent);
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
  margin-top: 1px;
}

/* ─── Solución: intro y lista check ─────────── */
.intro {
  font-size: var(--text-lg);
  color: var(--color-muted);
  margin-top: -1.5rem;
  margin-bottom: 1.75rem;
}

.check-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
}

.check-list li {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  font-size: var(--text-base);
  color: var(--color-text);
  border-bottom: 1px solid var(--border-color);
  transition: background var(--t);
}

.check-list li:last-child {
  border-bottom: none;
}

.check-list li:hover {
  background: var(--surface-card);
}

.check-list li::before {
  content: '✓';
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 24px;
  background: var(--accent-glow);
  color: var(--accent);
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 900;
  flex-shrink: 0;
}

/* ─── Ejemplos ───────────────────────────────── */
.ejemplos-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.ejemplo {
  display: grid;
  grid-template-columns: 1fr 2rem 1fr;
  align-items: center;
  gap: 0.75rem;
  padding: 1.1rem 1.25rem;
  background: var(--surface-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  font-size: var(--text-base);
  transition: border-color var(--t);
}

.ejemplo:hover {
  border-color: var(--accent);
}

.ejemplo__antes {
  color: var(--color-muted);
}

.ejemplo__arrow {
  color: var(--accent);
  font-weight: 800;
  font-size: 1.25rem;
  text-align: center;
}

.ejemplo__despues {
  font-weight: 700;
  color: var(--color-text);
}

/* ─── CTA ────────────────────────────────────── */
#cta {
  text-align: center;
  overflow: hidden;
}

.cta__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

#cta h2 {
  margin-bottom: 0;
  max-width: 640px;
}

.cta__note {
  font-size: var(--text-sm) !important;
  color: var(--color-faint) !important;
  font-weight: 400 !important;
  margin-top: -0.75rem !important;
}

/* ─── Formulario de contacto ─────────────────── */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  max-width: 540px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-muted);
}

.form-group input,
.form-group textarea {
  width: 100%;
  background: var(--surface-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  font-family: var(--font);
  font-size: 1rem;
  /* ≥16px — sin zoom en iOS */
  color: var(--color-text);
  line-height: 1.5;
  transition: border-color var(--t), box-shadow var(--t);
  min-height: 48px;
}

.form-group textarea {
  min-height: 130px;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-faint);
}

/* ─── Chatbot ────────────────────────────────── */
#chatbot {
  text-align: center;
}

.chatbot__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

#chatbot h2 {
  margin-bottom: 0;
}

#chatbot p {
  color: var(--color-muted) !important;
  max-width: 480px;
}

.chatbot__frame {
  margin-top: 2rem;
  width: 100%;
  max-width: 560px;
  border-radius: calc(var(--radius) * 1.5);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 32px rgba(0, 0, 0, 0.08);
}

.chatbot__frame iframe {
  width: 100%;
  height: 560px;
  border: none;
  display: block;
}

/* ─── Sectores — grid de cards ──────────────── */
.sector-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.sector-grid li {
  background: var(--surface-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  transition: border-color var(--t);
}

.sector-grid li:hover {
  border-color: var(--accent);
}

.sector-grid li::before {
  content: '→';
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
}

/* ─── ROI — lista de resultados ──────────────── */
.roi-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.roi-list li {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  background: var(--surface-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.1rem 1.5rem;
  transition: border-color var(--t);
}

.roi-list li:hover {
  border-color: var(--accent);
}

.roi__icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  width: 2.25rem;
  text-align: center;
}

.roi__text {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
}

/* ─── Fade-in al hacer scroll ────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in.d1 {
  transition-delay: 0.10s;
}

.fade-in.d2 {
  transition-delay: 0.20s;
}

.fade-in.d3 {
  transition-delay: 0.30s;
}

.fade-in.d4 {
  transition-delay: 0.40s;
}

/* ─── Responsive — Tablet ────────────────────── */
@media (min-width: 600px) {
  .btn--full {
    width: auto;
  }

  .ejemplo {
    grid-template-columns: 1fr 2.5rem 1fr;
    font-size: var(--text-lg);
  }

  .sector-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .roi-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ─── Responsive — Escritorio ────────────────── */
@media (min-width: 1024px) {
  .arrow-list li {
    font-size: var(--text-lg);
  }

  .check-list li {
    font-size: var(--text-lg);
  }
}

/* ─── Accesibilidad: movimiento reducido ─────── */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .btn,
  .arrow-list li,
  .check-list li,
  .ejemplo,
  .form-group input,
  .form-group textarea {
    transition: none;
  }
}