/* 3ia3 — hoja única para todas las páginas (EN y ES).
   Coral = Activa (salimos a buscarlos) · Turquesa = Pasiva (te encuentran) · Violeta = IA en el medio. */

:root {
  --ink: #0a0f1f;
  --ink-2: #131a33;
  --ink-3: #1d2647;
  --paper: #f6f6f1;
  --card: #ffffff;
  --text: #1a1f2e;
  --muted: #5b6275;
  --line: #e3e3dc;
  --act: #ff5a3c;
  --act-soft: #fff0ec;
  --pas: #10b3a6;
  --pas-soft: #e8f8f6;
  --ai: #8b7cff;
  --radius: 18px;
  --wrap: 1160px;
  --head: "Space Grotesk", system-ui, sans-serif;
  --body: "Inter", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font: 17px/1.6 var(--body);
  color: var(--text);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--head); line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 .5em; }
h1 { font-size: clamp(2.3rem, 5.4vw, 4.2rem); }
h2 { font-size: clamp(1.8rem, 3.6vw, 2.8rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 12px; z-index: 99; background: #fff; padding: 8px 12px; }

/* ---------- Logo: Ɛ · IA · 3 ---------- */
.logo { display: inline-flex; align-items: baseline; gap: .04em; font: 700 1.55rem/1 var(--head); text-decoration: none; color: #fff; letter-spacing: -.02em; }
.logo__l { color: var(--act); display: inline-block; transform: scaleX(-1); }
.logo__ia { color: var(--ai); font-size: .82em; padding: 0 .06em; }
.logo__r { color: var(--pas); }
.logo--dark { color: var(--ink); }

/* ---------- Cabecera fija ---------- */
.top {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 15, 31, .86);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,.07);
}
.top__in { display: flex; align-items: center; gap: 28px; height: 68px; }
.top nav { display: flex; gap: 22px; margin-left: auto; }
.top nav a { color: #c9cde0; text-decoration: none; font-size: .95rem; }
.top nav a:hover { color: #fff; }
.lang { color: #c9cde0; font-size: .85rem; text-decoration: none; border: 1px solid rgba(255,255,255,.2); border-radius: 99px; padding: 4px 10px; }
.lang:hover { border-color: #fff; color: #fff; }
.menu-btn { display: none; margin-left: auto; background: none; border: 1px solid rgba(255,255,255,.25); color: #fff; border-radius: 10px; padding: 7px 11px; font-size: .9rem; }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 22px; border-radius: 99px; border: 0;
  font: 600 1rem var(--body); text-decoration: none; cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn--act { background: var(--act); color: #fff; box-shadow: 0 10px 30px -10px rgba(255,90,60,.7); }
.btn--line { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.35); }
.btn--dark { background: var(--ink); color: #fff; }
.btn--small { padding: 9px 16px; font-size: .9rem; }

/* ---------- Hero ---------- */
.hero { background: radial-gradient(1100px 500px at 15% -10%, rgba(255,90,60,.22), transparent 60%),
                    radial-gradient(900px 500px at 95% 10%, rgba(16,179,166,.22), transparent 60%), var(--ink);
        color: #fff; padding: 84px 0 96px; overflow: hidden; }
.eyebrow { display: inline-block; font: 600 .78rem/1 var(--body); letter-spacing: .14em; text-transform: uppercase;
           color: #c9cde0; border: 1px solid rgba(255,255,255,.18); border-radius: 99px; padding: 8px 14px; margin-bottom: 22px; }
.hero h1 em { font-style: normal; color: var(--act); }
.hero h1 strong { font-weight: inherit; color: var(--pas); }
.lead { font-size: 1.2rem; color: #c9cde0; max-width: 640px; }
.hero .btns { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0 12px; }
.micro { font-size: .88rem; color: #8e94ab; }

/* Diagrama 3 · IA · 3 */
.engine { margin-top: 56px; display: grid; grid-template-columns: 1fr auto 1fr; gap: 18px; align-items: center; }
.engine__side { display: grid; gap: 10px; }
.engine__item { display: flex; gap: 12px; align-items: center; padding: 14px 16px; border-radius: 14px;
                background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.09); }
.engine__item b { font-family: var(--head); font-size: 1.05rem; }
.engine__item div span { color: #9aa0b6; font-size: .9rem; display: block; }
.engine__n { flex: none; width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; font: 700 .95rem var(--head); }
.engine__side--act .engine__n { background: rgba(255,90,60,.18); color: var(--act); }
.engine__side--pas .engine__n { background: rgba(16,179,166,.18); color: var(--pas); }
.engine__side--act { text-align: right; }
.engine__side--act .engine__item { flex-direction: row-reverse; }
.engine__core { width: 150px; height: 150px; border-radius: 50%; display: grid; place-items: center; text-align: center;
                background: radial-gradient(circle at 50% 40%, rgba(139,124,255,.45), rgba(139,124,255,.08) 70%);
                border: 1px solid rgba(139,124,255,.5); font: 700 2.4rem var(--head); color: #fff; }
.engine__core small { display: block; font: 500 .72rem var(--body); color: #c9cde0; letter-spacing: .08em; text-transform: uppercase; }
.engine__label { font: 600 .75rem var(--body); letter-spacing: .14em; text-transform: uppercase; margin-bottom: 4px; }
.engine__side--act .engine__label { color: var(--act); }
.engine__side--pas .engine__label { color: var(--pas); }

/* ---------- Secciones ---------- */
section { padding: 88px 0; }
.section-head { max-width: 720px; margin-bottom: 44px; }
.section-head p { color: var(--muted); font-size: 1.1rem; }
.kicker { font: 600 .78rem var(--body); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; display: block; }
.dark { background: var(--ink); color: #fff; }
.dark .section-head p, .dark .muted { color: #a5abc2; }
.dark .kicker { color: #8e94ab; }

/* Radar */
.radar { display: grid; grid-template-columns: 1.1fr 1fr; gap: 28px; }
.stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-bottom: 28px; }
.stat { background: var(--ink-2); border: 1px solid rgba(255,255,255,.08); border-radius: var(--radius); padding: 20px; }
.stat b { display: block; font: 700 2.2rem/1 var(--head); color: #fff; margin-bottom: 6px; }
.stat span { color: #a5abc2; font-size: .92rem; }
.panel { background: var(--ink-2); border: 1px solid rgba(255,255,255,.08); border-radius: var(--radius); padding: 22px; }
.panel h3 { font-size: 1rem; color: #c9cde0; font-family: var(--body); font-weight: 600; letter-spacing: 0; }
.bars { display: grid; gap: 10px; }
.bar { display: grid; grid-template-columns: 120px 1fr 52px; gap: 10px; align-items: center; font-size: .9rem; color: #c9cde0; }
.bar i { display: block; height: 10px; border-radius: 99px; background: linear-gradient(90deg, var(--act), var(--ai)); }
.bar--pas i { background: linear-gradient(90deg, var(--pas), var(--ai)); }
.bar em { font-style: normal; text-align: right; color: #fff; font-variant-numeric: tabular-nums; }
.source { font-size: .82rem; color: #8e94ab; margin-top: 18px; }
.source a { color: #c9cde0; }

/* Dos enfoques */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; }
.card--act { border-top: 4px solid var(--act); }
.card--pas { border-top: 4px solid var(--pas); }
.tag { display: inline-block; font: 700 .72rem var(--body); letter-spacing: .14em; text-transform: uppercase; padding: 6px 10px; border-radius: 8px; margin-bottom: 14px; }
.tag--act { background: var(--act-soft); color: #c2381e; }
.tag--pas { background: var(--pas-soft); color: #08786f; }
.steps { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 14px; }
.steps li { display: grid; grid-template-columns: 36px 1fr; gap: 12px; }
.steps li b { display: block; }
.steps li span { color: var(--muted); font-size: .95rem; }
.num { width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center; font: 700 .95rem var(--head); }
.card--act .num { background: var(--act-soft); color: #c2381e; }
.card--pas .num { background: var(--pas-soft); color: #08786f; }

/* Quién */
.who { display: grid; grid-template-columns: 1.3fr 1fr; gap: 22px; }
.who__main { background: var(--ink); color: #fff; border-radius: var(--radius); padding: 34px; }
.who__main p { color: #c9cde0; }
.who__main ul { padding-left: 18px; color: #c9cde0; }
.who__side { display: grid; gap: 14px; align-content: start; }

/* Segmentos (tres tarjetas) */
.segs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.segs .card { display: flex; flex-direction: column; }
.segs .card .tag { align-self: flex-start; }
.segs .card > a:last-child { margin-top: auto; padding-top: 18px; font-weight: 600; }
.muted-dark { color: var(--muted); margin-bottom: 0; }
.card--ai { border-top: 4px solid var(--ai); }
.tag--ai { background: #efedff; color: #5a49d6; }
.card--ai .num { background: #efedff; color: #5a49d6; }

/* Cómo */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; counter-reset: f; }
.flow li { list-style: none; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.flow li::before { counter-increment: f; content: "0" counter(f); display: block; font: 700 1.6rem var(--head); color: var(--ai); margin-bottom: 8px; }
.flow { padding: 0; margin: 0; }
.flow span { color: var(--muted); font-size: .95rem; display: block; }

/* Garantías */
.promise { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 22px; }
.promise div { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.promise b { display: block; font-family: var(--head); font-size: 1.1rem; margin-bottom: 4px; }
.promise span { color: var(--muted); font-size: .95rem; }

/* FAQ */
.faq { max-width: 820px; }
.faq details { border-bottom: 1px solid var(--line); padding: 18px 0; }
.faq summary { cursor: pointer; font: 600 1.08rem var(--head); list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::after { content: "+"; color: var(--ai); font-size: 1.4rem; line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq details p { color: var(--muted); margin: 12px 0 0; }

/* Contacto */
.contact { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: start; }
form { background: var(--ink-2); border: 1px solid rgba(255,255,255,.08); border-radius: var(--radius); padding: 26px; display: grid; gap: 14px; }
label { font-size: .88rem; color: #c9cde0; display: grid; gap: 6px; }
input, select, textarea { font: 1rem var(--body); padding: 12px 14px; border-radius: 10px; border: 1px solid rgba(255,255,255,.15); background: var(--ink); color: #fff; }
textarea { min-height: 110px; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--ai); border-color: transparent; }
.form-note { font-size: .82rem; color: #8e94ab; margin: 0; }
.form-status { margin: 0; font-size: .95rem; min-height: 1.2em; color: #c9cde0; }
.form-status--ok { color: #5fe0d4; }
.form-status--err { color: #ff9a85; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
button:disabled { opacity: .6; cursor: wait; transform: none; }

/* Pie */
footer { background: #060a16; color: #8e94ab; padding: 48px 0 36px; font-size: .9rem; }
.foot { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 28px; }
footer a { color: #c9cde0; text-decoration: none; }
footer a:hover { color: #fff; }
footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.foot__bottom { border-top: 1px solid rgba(255,255,255,.07); margin-top: 32px; padding-top: 20px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

/* Página legal */
.legal { max-width: 760px; padding: 64px 20px; margin: 0 auto; }
.legal h2 { font-size: 1.4rem; margin-top: 1.6em; }

/* Ejemplo de registro */
.record { background: var(--card); border: 1px dashed #b9b9ae; border-radius: var(--radius); padding: 22px; font-size: .95rem; }
.record__flag { display: inline-block; font: 700 .7rem var(--body); letter-spacing: .12em; text-transform: uppercase; background: #fff5d6; color: #8a6400; padding: 5px 9px; border-radius: 6px; margin-bottom: 12px; }
.record dl { display: grid; grid-template-columns: 150px 1fr; gap: 8px 14px; margin: 0; }
.record dt { color: var(--muted); }
.record dd { margin: 0; }
.dates { display: grid; gap: 12px; }
.date { display: grid; grid-template-columns: 120px 1fr; gap: 14px; background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px 18px; }
.date b { font-family: var(--head); color: var(--act); }
.date span { color: var(--muted); font-size: .95rem; }
.price { display: flex; align-items: baseline; gap: 8px; margin: 10px 0 6px; }
.price b { font: 700 2.8rem/1 var(--head); }

/* ---------- Móvil ---------- */
@media (max-width: 900px) {
  .top nav { display: none; position: absolute; top: 68px; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--ink); padding: 8px 20px 18px; border-bottom: 1px solid rgba(255,255,255,.08); }
  .top nav.open { display: flex; }
  .top nav a { padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.06); }
  .menu-btn { display: inline-block; }
  .top .btn--small { display: none; }
  .engine { grid-template-columns: 1fr; }
  .engine__core { margin: 4px auto; width: 120px; height: 120px; font-size: 2rem; }
  .engine__side--act { text-align: left; }
  .engine__side--act .engine__item { flex-direction: row; }
  .radar, .split, .who, .contact, .foot, .segs { grid-template-columns: 1fr; }
  .flow, .promise { grid-template-columns: 1fr 1fr; }
  .stat-row { grid-template-columns: 1fr 1fr 1fr; }
  section { padding: 64px 0; }
  .hero { padding: 56px 0 64px; }
}
@media (max-width: 560px) {
  .flow, .promise, .stat-row { grid-template-columns: 1fr; }
  .bar { grid-template-columns: 96px 1fr 44px; }
  .record dl, .date { grid-template-columns: 1fr; }
  .record dt { margin-top: 6px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
}