/* =============================================================
   NEXXUS — Mouse-Reactive Gradient (archetype 05)
   1. Tokens
   ============================================================= */
:root {
  /* Marca (ver docs/MARCA.md) */
  --bg:        #05050A;
  --bg-2:      #0B0B12;
  --bg-3:      #12121A;
  --surface:   #1C1C28;
  --ink:       #F5F7FA;
  --mute:      #9CA3AF;
  --metal:     #C0C6D4;
  --metal-2:   #8A92A6;

  --accent:    #22D3EE;   /* cian neón */
  --g1:        #22D3EE;   /* cian */
  --g2:        #3B82F6;   /* azul núcleo */
  --g3:        #A855F7;   /* púrpura */
  --g4:        #D946EF;   /* magenta */

  --line:      rgba(245,247,250,0.10);
  --line-2:    rgba(245,247,250,0.18);

  --brand-gradient: linear-gradient(120deg, var(--g1) 0%, var(--g2) 40%, var(--g3) 70%, var(--g4) 100%);

  --sans: "Inter", system-ui, -apple-system, sans-serif;
  --display: "Space Grotesk", var(--sans);
  --mono: "JetBrains Mono", ui-monospace, monospace;

  --ease-out:   cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft:  cubic-bezier(0.25, 0.46, 0.45, 0.94);

  --container: 1180px;
  --gutter: clamp(1.2rem, 5vw, 4rem);
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  overflow-x: clip;
}
body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
}
img, svg, video { display: block; max-width: 100%; height: auto; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.04; letter-spacing: -0.02em; font-family: var(--display); font-weight: 600; }
ul { list-style: none; padding: 0; }
::selection { background: var(--g4); color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

/* =============================================================
   3. Utilities
   ============================================================= */
.skip-link {
  position: fixed; top: -100px; left: 1rem;
  padding: .6rem 1rem; background: var(--ink); color: var(--bg);
  z-index: 9999; border-radius: 8px; font-weight: 600;
}
.skip-link:focus { top: 1rem; }

.kicker {
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--accent);
}

.section-head { max-width: var(--container); margin: 0 auto clamp(2rem, 5vw, 3.5rem); }
.section-head h2 { font-size: clamp(2rem, 5.5vw, 3.6rem); margin-top: .6rem; }

main > section {
  padding-block: clamp(4rem, 11vw, 9rem);
  padding-inline: var(--gutter);
  position: relative;
}

/* =============================================================
   4. Reveal animation (functional — NOT gated by reduced-motion)
   ============================================================= */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity .9s var(--ease-out), transform .9s var(--ease-out); }
.reveal.is-visible { opacity: 1; transform: none; }
/* Defensive: split-text elements must never stay invisible (gotcha A.4.5) */
.reveal[data-split] { opacity: 1; transform: none; }

/* =============================================================
   5. Components — buttons
   ============================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: .5rem;
  padding: .9rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: .98rem;
  transition: transform .35s var(--ease-out), box-shadow .35s var(--ease-out), opacity .3s;
  will-change: transform;
}
.btn-primary {
  background: var(--brand-gradient);
  background-size: 180% 180%;
  color: #04040A;
  box-shadow: 0 8px 30px -8px rgba(168,85,247,.55);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 44px -10px rgba(34,211,238,.6); }
.btn-ghost {
  border: 1px solid var(--line-2);
  color: var(--ink);
  background: rgba(255,255,255,0.02);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* =============================================================
   6. Background gradient (mouse-reactive) + grain
   ============================================================= */
.bg-gradient {
  position: fixed; inset: 0; z-index: -2;
  background:
    radial-gradient(circle 620px at var(--mx, 50%) var(--my, 35%), rgba(34,211,238,.20) 0%, transparent 55%),
    radial-gradient(circle 760px at calc(var(--mx, 50%) + 12%) calc(var(--my, 35%) + 8%), rgba(168,85,247,.20) 0%, transparent 55%),
    radial-gradient(circle 700px at calc(var(--mx, 50%) - 14%) calc(var(--my, 35%) + 16%), rgba(217,70,239,.16) 0%, transparent 55%),
    var(--bg);
  filter: blur(30px) saturate(135%);
  transition: background .35s var(--ease-soft);
}
.bg-grain {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  opacity: .05; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* =============================================================
   7. Splash
   ============================================================= */
.splash {
  position: fixed; inset: 0; z-index: 9998;
  display: grid; place-items: center;
  background: var(--bg);
  transition: opacity .8s var(--ease-out), clip-path .9s var(--ease-out);
  animation: splashSafety .01s 4.5s forwards;
}
.splash-mark {
  font-family: var(--display); font-weight: 700;
  font-size: clamp(2rem, 8vw, 4rem); letter-spacing: .3em;
  background: var(--brand-gradient); -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: pulse 1.6s var(--ease-soft) infinite;
}
.splash.is-out { opacity: 0; pointer-events: none; clip-path: inset(0 0 100% 0); }
@keyframes splashSafety { to { opacity: 0; pointer-events: none; clip-path: inset(0 0 100% 0); } }
@keyframes pulse { 0%,100% { opacity: .55; } 50% { opacity: 1; } }

/* =============================================================
   8. Nav
   ============================================================= */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem;
  padding: 1rem var(--gutter);
  transition: background .4s var(--ease-out), backdrop-filter .4s, border-color .4s;
  border-bottom: 1px solid transparent;
}
.nav.is-stuck {
  background: rgba(5,5,10,.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
}
.nav-brand { display: flex; align-items: center; gap: .6rem; font-family: var(--display); font-weight: 700; letter-spacing: .12em; }
.nav-logo { border-radius: 8px; }
.nav-links { display: none; gap: 1.8rem; font-size: .95rem; color: var(--mute); }
.nav-links a { position: relative; transition: color .3s; }
.nav-links a::after { content: ""; position: absolute; left: 0; bottom: -4px; width: 0; height: 1px; background: var(--accent); transition: width .35s var(--ease-out); }
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after { width: 100%; }
.nav-cta { padding: .6rem 1.1rem; font-size: .9rem; }

/* =============================================================
   9. Hero
   ============================================================= */
.hero {
  min-height: 100vh; min-height: 100svh;
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  text-align: center;
  padding-inline: var(--gutter);
  padding-top: 6rem;
}
.hero-title {
  font-size: clamp(2.8rem, 11vw, 8rem);
  font-weight: 700;
  line-height: 0.98;
  max-width: 16ch;
  letter-spacing: -0.03em;
  margin: 1.2rem 0;
}
.hero-title em {
  font-style: normal;
  background: var(--brand-gradient);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { max-width: 52ch; color: var(--mute); font-size: clamp(1.05rem, 2vw, 1.3rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; margin-top: 2.4rem; }
.hero-scroll { margin-top: 3.5rem; font-family: var(--mono); font-size: .72rem; letter-spacing: .25em; text-transform: uppercase; color: var(--mute); display: flex; flex-direction: column; align-items: center; gap: .5rem; }
.hero-scroll span { width: 1px; height: 42px; background: linear-gradient(var(--accent), transparent); animation: scrollLine 2.2s var(--ease-soft) infinite; }
@keyframes scrollLine { 0% { transform: scaleY(0); transform-origin: top; } 50% { transform: scaleY(1); transform-origin: top; } 51% { transform-origin: bottom; } 100% { transform: scaleY(0); transform-origin: bottom; } }

/* split-text words */
.split-word { display: inline-block; }

/* =============================================================
   10. Manifesto
   ============================================================= */
.manifesto { display: grid; place-items: center; text-align: center; }
.manifesto p {
  max-width: 26ch;
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(1.7rem, 4.4vw, 3rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.manifesto em { font-style: normal; background: var(--brand-gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* =============================================================
   11. Services (vertical list, accordion)
   ============================================================= */
.services { max-width: var(--container); margin-inline: auto; }
.svc-list { border-top: 1px solid var(--line); }
.svc { border-bottom: 1px solid var(--line); }
.svc-row {
  width: 100%; display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center; gap: 1rem;
  padding: clamp(1.3rem, 3vw, 2.1rem) 0;
  text-align: left;
  transition: color .3s;
}
.svc-num { font-family: var(--mono); font-size: .85rem; color: var(--metal-2); }
.svc-name { font-family: var(--display); font-weight: 600; font-size: clamp(1.3rem, 3.6vw, 2.3rem); letter-spacing: -0.02em; transition: color .3s; }
.svc-tag { display: none; font-family: var(--mono); font-size: .76rem; letter-spacing: .12em; text-transform: uppercase; color: var(--mute); grid-column: 2; }
.svc-toggle { font-family: var(--display); font-size: 1.6rem; color: var(--accent); transition: transform .4s var(--ease-out); justify-self: end; }
.svc-row:hover .svc-name { color: var(--accent); }
.svc[aria-open="true"] .svc-toggle { transform: rotate(45deg); }
.svc-body { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .45s var(--ease-out); }
.svc-body > p { overflow: hidden; color: var(--mute); max-width: 60ch; padding-left: clamp(0px, 6vw, 3.4rem); }
.svc[aria-open="true"] .svc-body { grid-template-rows: 1fr; }
.svc[aria-open="true"] .svc-body > p { padding-bottom: 1.6rem; }

/* =============================================================
   12. Stats
   ============================================================= */
.stats {
  max-width: var(--container); margin-inline: auto;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem;
  text-align: center;
  border-block: 1px solid var(--line);
}
.stat-num { display: block; font-family: var(--display); font-weight: 700; font-size: clamp(2.6rem, 9vw, 5.5rem); line-height: 1; background: var(--brand-gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat-label { display: block; margin-top: .6rem; font-family: var(--mono); font-size: .8rem; letter-spacing: .14em; text-transform: uppercase; color: var(--mute); }

/* =============================================================
   13. Process
   ============================================================= */
.process { max-width: var(--container); margin-inline: auto; }
.proc-grid { display: grid; gap: 1.2rem; }
.proc {
  padding: clamp(1.6rem, 4vw, 2.6rem);
  border: 1px solid var(--line);
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(255,255,255,.025), rgba(255,255,255,0));
  transition: transform .4s var(--ease-out), border-color .4s;
}
.proc:hover { transform: translateY(-6px); border-color: var(--line-2); }
.proc-num { font-family: var(--mono); color: var(--accent); font-size: .95rem; }
.proc h3 { font-size: clamp(1.4rem, 3vw, 2rem); margin: .6rem 0 .7rem; }
.proc p { color: var(--mute); }

/* =============================================================
   14. Case
   ============================================================= */
.case { max-width: var(--container); margin-inline: auto; }
.case-card {
  position: relative;
  padding: clamp(1.8rem, 5vw, 3.4rem);
  border-radius: 24px;
  border: 1px solid var(--line-2);
  background: linear-gradient(135deg, rgba(34,211,238,.06), rgba(168,85,247,.06));
  overflow: hidden;
}
.case-card::before {
  content: ""; position: absolute; inset: 0; padding: 1px; border-radius: 24px;
  background: var(--brand-gradient);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: .5; pointer-events: none;
}
.case-tag { font-family: var(--mono); font-size: .8rem; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); }
.case-card h3 { font-size: clamp(1.5rem, 4vw, 2.5rem); margin: .7rem 0 1rem; }
.case-desc { color: var(--mute); max-width: 60ch; }
.case-points { margin-top: 1.6rem; display: grid; gap: .7rem; }
.case-points li { padding-left: 1.6rem; position: relative; color: var(--ink); }
.case-points li::before { content: ""; position: absolute; left: 0; top: .55em; width: 8px; height: 8px; border-radius: 50%; background: var(--brand-gradient); }

/* =============================================================
   15. Contact + form
   ============================================================= */
.contact { max-width: var(--container); margin-inline: auto; text-align: center; }
.contact-mail {
  display: inline-block;
  font-family: var(--display); font-weight: 600;
  font-size: clamp(1.6rem, 5vw, 3rem);
  letter-spacing: -0.02em;
  position: relative;
  margin-bottom: clamp(2.5rem, 6vw, 4rem);
}
.contact-mail::after { content: ""; position: absolute; left: 0; bottom: -.2rem; width: 0; height: 2px; background: var(--brand-gradient); transition: width .45s var(--ease-out); }
.contact-mail:hover::after { width: 100%; }

.lead-form {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1rem;
  max-width: 640px; margin-inline: auto; text-align: left;
}
.field { display: flex; flex-direction: column; gap: .4rem; }
.field-full { grid-column: 1 / -1; }
.field label { font-family: var(--mono); font-size: .74rem; letter-spacing: .1em; text-transform: uppercase; color: var(--mute); }
.field input, .field textarea {
  width: 100%; padding: .85rem 1rem;
  background: var(--bg-3); border: 1px solid var(--line); border-radius: 12px;
  color: var(--ink); font-family: var(--sans); font-size: 1rem;
  transition: border-color .3s, background .3s;
  resize: vertical;
}
.field input:focus, .field textarea:focus { border-color: var(--accent); background: var(--surface); outline: none; }
.lead-submit { grid-column: 1 / -1; margin-top: .4rem; }
.lead-status { grid-column: 1 / -1; min-height: 1.2em; font-size: .92rem; color: var(--accent); text-align: center; }
.lead-status.is-error { color: #F87171; }

/* =============================================================
   16. Footer
   ============================================================= */
.footer {
  padding: clamp(3rem, 7vw, 5rem) var(--gutter) 3rem;
  border-top: 1px solid var(--line);
  display: flex; flex-direction: column; align-items: center; gap: 1rem;
  text-align: center;
}
.footer-brand { display: flex; align-items: center; gap: .6rem; font-family: var(--display); font-weight: 700; letter-spacing: .14em; font-size: 1.2rem; }
.footer-logo { border-radius: 9px; }
.footer-tag { color: var(--mute); }
.footer-links { display: flex; gap: 1.5rem; color: var(--mute); font-size: .95rem; }
.footer-links a { transition: color .3s; }
.footer-links a:hover { color: var(--accent); }
.footer-copy { font-family: var(--mono); font-size: .76rem; color: var(--metal-2); letter-spacing: .06em; }

/* =============================================================
   Sistema (premium) + Oferta
   ============================================================= */
.system { max-width: var(--container); margin-inline: auto; }
.system-lead { max-width: 46ch; margin: 0 auto clamp(2rem, 5vw, 3rem); text-align: center; color: var(--mute); font-size: clamp(1.05rem, 2vw, 1.28rem); }
.sys-grid { display: grid; gap: 1.2rem; }
.sys-col { padding: clamp(1.6rem, 4vw, 2.6rem); border: 1px solid var(--line); border-radius: 20px; background: linear-gradient(180deg, rgba(255,255,255,.025), rgba(255,255,255,0)); transition: transform .4s var(--ease-out), border-color .4s; }
.sys-col:hover { transform: translateY(-6px); border-color: var(--line-2); }
.sys-col .proc-num { font-family: var(--mono); color: var(--accent); font-size: .82rem; letter-spacing: .06em; }
.sys-col h3 { font-size: clamp(1.35rem, 2.8vw, 1.9rem); margin: .55rem 0 .7rem; }
.sys-col p { color: var(--mute); }
.system-cta { text-align: center; margin-top: clamp(2rem, 5vw, 3rem); }

.offer { max-width: var(--container); margin-inline: auto; }
.offer-card h3 { max-width: 26ch; }
.offer-cta { margin-top: 1.8rem; display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.4rem; }
.offer-note { font-family: var(--mono); font-size: .8rem; letter-spacing: .08em; color: var(--mute); }
.contact-social { margin-top: -1.2rem; margin-bottom: clamp(2.4rem, 6vw, 3.6rem); font-family: var(--mono); font-size: .92rem; letter-spacing: .03em; }
.contact-social a { color: var(--accent); transition: opacity .3s; }
.contact-social a:hover { opacity: .8; text-decoration: underline; }
@media (min-width: 960px) { .sys-grid { grid-template-columns: repeat(3, 1fr); } }

/* =============================================================
   17. Responsive
   ============================================================= */
@media (min-width: 720px) {
  .svc-tag { display: block; grid-column: auto; }
  .svc-row { grid-template-columns: auto 1fr auto auto; gap: 1.6rem; }
}
@media (min-width: 960px) {
  .nav-links { display: flex; }
  .proc-grid { grid-template-columns: repeat(3, 1fr); }
}

/* =============================================================
   18. Reduced motion (ONLY intrusive effects)
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .splash-mark { animation: none; }
  .hero-scroll span { animation: none; }
  .bg-gradient { transition: none; }
}