:root {
  --bg: #04050a;
  --surface: #0d111d;
  --surface-alt: #141a2b;
  --text: #f5f7ff;
  --muted: #9aa3bb;
  --aqua: #29d5c1;
  --cyan: #58a6ff;
  --rose: #ff4f8b;
  --line: rgba(255, 255, 255, 0.12);
  --shadow: 0 20px 60px rgba(2, 8, 20, 0.45);
  --header-h: 4.2rem;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Space Grotesk", sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 700px at 12% -10%, rgba(88, 166, 255, 0.28), transparent 60%),
    radial-gradient(950px 650px at 100% 5%, rgba(255, 79, 139, 0.18), transparent 50%),
    radial-gradient(900px 650px at 50% 110%, rgba(41, 213, 193, 0.14), transparent 55%),
    var(--bg);
  line-height: 1.55;
  overflow-x: hidden;
}

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  opacity: 0.2;
  background-image: radial-gradient(rgba(255, 255, 255, 0.09) 0.6px, transparent 0.6px);
  background-size: 2px 2px;
  mix-blend-mode: soft-light;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 20;
  padding: 0.6rem 1rem;
  background: var(--surface-alt);
  color: var(--text);
  border-radius: 0 0 10px 0;
}

.skip-link:focus {
  left: 0;
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 6vw;
  border-bottom: 1px solid var(--line);
  background: rgba(4, 5, 10, 0.72);
  backdrop-filter: blur(10px);
}

.brand {
  text-decoration: none;
  color: var(--text);
  font-family: "Outfit", sans-serif;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.menu-btn {
  display: none;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.6rem;
}

.site-nav a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 500;
  font-size: 0.94rem;
  transition: color 180ms ease;
}

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

.nav-cta {
  color: var(--text) !important;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.4rem 0.95rem;
  font-weight: 700 !important;
}

.nav-cta:hover {
  border-color: var(--aqua);
}

/* ---------- Layout ---------- */

main {
  width: min(1140px, 92vw);
  margin: 0 auto;
  padding-bottom: 6rem;
}

.section {
  padding: 8rem 0 0;
}

.tag {
  margin: 0 0 1.1rem;
  color: var(--aqua);
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  font-weight: 700;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Outfit", sans-serif;
  /* 1.06 recortaba los descendentes (g, q, p) en pantallas pequeñas. */
  line-height: 1.14;
}

h1 span {
  background: linear-gradient(95deg, var(--aqua), var(--cyan) 50%, var(--rose));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Portada a pantalla completa ---------- */

.hero {
  min-height: calc(100svh - var(--header-h));
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2rem 0 6rem;
}

/* El titular de la portada conserva Syne. El resto usa Outfit porque la
   minuscula "g" de Syne tiene la cola cortada; esta frase no lleva ninguna. */
.hero h1 {
  font-family: "Syne", sans-serif;
  font-size: clamp(2.6rem, 7vw, 5.6rem);
  max-width: 20ch;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

/* Pie de la portada: pruebas rápidas + indicador de scroll. */
.hero-foot {
  margin-top: auto;
  padding-top: 2.5rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 2.5rem;
}

.hero-foot div {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
}

.hero-foot strong {
  font-family: "Outfit", sans-serif;
  font-size: 1.5rem;
  color: var(--text);
}

.hero-foot span {
  color: var(--muted);
  font-size: 0.92rem;
}

.scroll-cue {
  margin-left: auto;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.scroll-cue:hover {
  color: var(--aqua);
}

.scroll-cue i {
  font-style: normal;
  animation: cue-bounce 1.8s ease-in-out infinite;
}

@keyframes cue-bounce {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(4px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .scroll-cue i {
    animation: none;
  }
}

.lead {
  font-size: clamp(1.02rem, 1.5vw, 1.25rem);
  color: var(--muted);
  max-width: 58ch;
  margin: 1.8rem 0 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2.6rem;
}

/* ---------- Botones ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.5rem;
  border-radius: 999px;
  text-decoration: none;
  border: 1px solid transparent;
  font-weight: 700;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

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

.btn-primary {
  color: #061124;
  background: linear-gradient(105deg, var(--aqua), var(--cyan) 56%, #86c7ff);
  box-shadow: 0 8px 26px rgba(88, 166, 255, 0.33);
}

.btn-ghost {
  color: var(--text);
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.btn-ghost:hover {
  border-color: var(--aqua);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.05rem;
  margin-top: 2rem;
}

/* ---------- Encabezados de sección ---------- */

.section-head h2 {
  font-size: clamp(1.9rem, 4vw, 3.4rem);
  max-width: 22ch;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

.section-intro {
  color: var(--muted);
  max-width: 56ch;
  margin: 1.1rem 0 0;
}

/* ---------- Capacidades (3 pilares) ---------- */

.pillars {
  margin-top: 3.5rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
}

.pillar {
  padding: 2.2rem 2rem 2.4rem 0;
  border-right: 1px solid var(--line);
}

.pillar:last-child {
  border-right: 0;
  padding-right: 0;
}

.pillar:not(:first-child) {
  padding-left: 2rem;
}

.pillar-number {
  margin: 0 0 1.4rem;
  font-family: "Outfit", sans-serif;
  font-weight: 800;
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  color: var(--aqua);
}

.pillar h3 {
  font-size: 1.45rem;
  margin-bottom: 0.9rem;
}

.pillar p {
  margin: 0;
  color: var(--muted);
}

/* ---------- Banda de llamada a la acción ---------- */

.cta-band {
  margin-top: 4rem;
  padding: 2.2rem 2.4rem;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: linear-gradient(120deg, rgba(41, 213, 193, 0.08), rgba(88, 166, 255, 0.05));
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.4rem;
}

.cta-band p {
  margin: 0;
  font-family: "Outfit", sans-serif;
  font-weight: 700;
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  max-width: 24ch;
}

/* ---------- Método ---------- */

.steps {
  list-style: none;
  margin: 3.5rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 2rem;
}

.steps li {
  border-top: 2px solid var(--aqua);
  padding-top: 1.2rem;
}

.step-n {
  font-family: "Outfit", sans-serif;
  font-weight: 800;
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.steps h3 {
  font-size: 1.25rem;
  margin: 0.6rem 0 0.6rem;
}

.steps p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* ---------- Stack ---------- */

.chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 3rem 0 0;
  padding: 0;
}

.chips li {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.4rem 0.95rem;
  font-size: 0.88rem;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.03);
  transition: color 160ms ease, border-color 160ms ease;
}

.chips li:hover {
  color: var(--text);
  border-color: var(--aqua);
}

/* ---------- FAQ ---------- */

.faq-list {
  margin-top: 3rem;
  display: grid;
  gap: 0.7rem;
}

.card {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.03);
}

.faq-list details {
  padding: 1.1rem 1.4rem;
  transition: border-color 160ms ease;
}

.faq-list details[open] {
  border-color: rgba(41, 213, 193, 0.4);
}

.faq-list summary {
  cursor: pointer;
  list-style: none;
  font-family: "Outfit", sans-serif;
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  content: "+";
  color: var(--aqua);
  font-size: 1.4rem;
  line-height: 1;
  transition: transform 180ms ease;
}

.faq-list details[open] summary::after {
  transform: rotate(45deg);
}

.faq-list p {
  margin: 0.9rem 0 0;
  max-width: 74ch;
  color: var(--muted);
}

/* ---------- Contacto ---------- */

.contact h2 {
  font-size: clamp(2rem, 5vw, 4rem);
  max-width: 20ch;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.contact p {
  color: var(--muted);
  max-width: 50ch;
  margin: 1.2rem 0 0;
}

/* ---------- Footer ---------- */

footer {
  width: min(1140px, 92vw);
  margin: 0 auto 2.5rem;
  border-top: 1px solid var(--line);
  padding-top: 1.4rem;
  color: var(--muted);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.6rem;
  margin-bottom: 1rem;
}

.footer-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
}

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

footer p {
  font-size: 0.86rem;
  margin: 0;
}

/* ---------- Animación de entrada ---------- */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 550ms ease, transform 550ms ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .btn:hover {
    transform: none;
  }

  html {
    scroll-behavior: auto;
  }
}

/* ---------- Responsive ---------- */

@media (max-width: 980px) {
  .pillars {
    grid-template-columns: 1fr;
  }

  .pillar,
  .pillar:not(:first-child) {
    padding: 1.8rem 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .pillar:last-child {
    border-bottom: 0;
  }

  .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .site-header {
    height: auto;
    padding: 0.9rem 4vw;
    flex-wrap: wrap;
    gap: 0.7rem;
  }

  .menu-btn {
    display: inline-flex;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text);
    border-radius: 10px;
    padding: 0.45rem 0.65rem;
    font-weight: 700;
  }

  .site-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.9rem;
    padding-top: 0.6rem;
  }

  .site-nav.is-open {
    display: flex;
  }

  .steps {
    grid-template-columns: 1fr;
  }

  .section {
    padding-top: 5.5rem;
  }

  .cta-band {
    padding: 1.6rem;
  }

  /* La portada debe caber en una pantalla: stats en 3 columnas compactas. */
  .hero {
    padding-bottom: 2.5rem;
  }

  .hero-foot {
    gap: 1rem;
    padding-top: 1.4rem;
  }

  .hero-foot div {
    flex: 1;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.1rem;
  }

  .hero-foot strong {
    font-size: 1.1rem;
  }

  .hero-foot span {
    font-size: 0.72rem;
    line-height: 1.3;
  }

  .scroll-cue {
    display: none;
  }
}