/* ============================================================
   Nexakon EPC — sitio publico
   Direccion visual derivada del logo REAL: la "A" es una torre de
   celosia, el logotipo es monolinea, geometrico y de tracking amplio.
   El lenguaje es ese: linea fina, triangulacion, precision de ingenieria.
   Naranja #ff7e2e muestreado del PNG del logo (NO el #f39200 del sitio viejo).

   Claro con hero oscuro: el contraste de la industria pesada seria.
   ============================================================ */

:root {
  /* Samsung Internet y Chrome Android con "force dark mode" aplican un
     auto-darkening generico que rompe el menu (texto blanco sobre fondo
     blanco) y los controles nativos. El sitio es claro a proposito. */
  color-scheme: light;

  --font-body: 'IBM Plex Sans', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;

  --fs-xs: .72rem;
  --fs-sm: .82rem;
  --fs-base: .95rem;
  --fs-md: 1.08rem;
  --fs-lg: 1.35rem;
  --fs-xl: 1.9rem;
  --fs-2xl: clamp(2rem, 3.4vw, 3.1rem);
  --fs-hero: clamp(2.6rem, 6vw, 5.4rem);

  /* Claros — blancos calidos, no azulados. El naranja del logo es calido
     y sobre un blanco frio se ve sucio. */
  --c-surface: #ffffff;
  --c-surface-alt: #faf8f5;
  --c-surface-2: #f2efe9;
  --c-line: #e5e0d8;
  --c-line-soft: #f0ece5;

  /* Oscuros — solo el hero y el footer */
  --c-ink: #0b0d10;
  --c-ink-2: #12151a;

  --c-text: #16191e;
  --c-text-soft: #565c66;
  --c-text-mute: #8b9199;

  --c-accent: #ff7e2e;       /* naranja REAL del logo */
  --c-accent-deep: #d9601a;  /* para texto naranja sobre blanco: contraste AA */

  --s-1: 4px;  --s-2: 8px;  --s-3: 12px; --s-4: 16px; --s-5: 24px;
  --s-6: 32px; --s-7: 48px; --s-8: 72px; --s-9: 112px;

  --sh-1: 0 1px 2px rgba(11, 13, 16, .04);
  --sh-2: 0 8px 24px rgba(11, 13, 16, .07), 0 2px 6px rgba(11, 13, 16, .04);
  --sh-3: 0 18px 44px rgba(11, 13, 16, .10), 0 4px 10px rgba(11, 13, 16, .05);

  --ease: cubic-bezier(.22, .61, .36, 1);
  --ease-out: cubic-bezier(.16, 1, .3, 1);
  --t-fast: 160ms;
  --t-med: 320ms;

  --wrap: 1240px;
  --bar: 72px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--c-surface);
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; line-height: 1.06; letter-spacing: -.035em; font-weight: 600; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

:focus-visible { outline: 2px solid var(--c-accent-deep); outline-offset: 3px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important; animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: var(--s-5); }

.skip-link {
  position: absolute; left: -9999px; top: var(--s-2); z-index: 100;
  background: var(--c-accent); color: #000; padding: var(--s-3) var(--s-5); font-weight: 600;
}
.skip-link:focus { left: var(--s-4); }

/* ---------- etiqueta tecnica ---------- */

.tag {
  display: inline-flex; align-items: center; gap: var(--s-3);
  font-family: var(--font-mono); font-size: var(--fs-xs);
  text-transform: uppercase; letter-spacing: .2em; color: var(--c-text-mute);
}
.tag::before { content: ""; width: 22px; height: 1px; background: var(--c-accent); flex: none; }
.tag-plain::before { display: none; }
.on-dark .tag, .tag-light { color: rgba(255, 255, 255, .55); }

/* ---------- topbar ---------- */

.topbar {
  position: fixed; inset: 0 0 auto; z-index: 60; height: var(--bar);
  display: flex; align-items: center;
  border-bottom: 1px solid transparent;
  transition: background var(--t-med) var(--ease), border-color var(--t-med) var(--ease);
}
.topbar-inner { display: flex; align-items: center; gap: var(--s-6); width: 100%; }

/* Sobre el hero oscuro el logo va en blanco; al bajar, la barra se vuelve
   clara y hay que invertirlo. Un solo filtro en vez de dos juegos de PNG. */
.brand { display: flex; align-items: center; gap: var(--s-3); margin-right: auto; }
.brand img.mark { height: 22px; width: auto; }
.brand img.word { height: 13px; width: auto; }
.brand img { transition: filter var(--t-med) var(--ease); }

.nav { display: flex; align-items: center; gap: var(--s-6); }
.nav a { font-size: var(--fs-sm); color: rgba(255, 255, 255, .72); transition: color var(--t-fast) var(--ease); }
.nav a:hover { color: #fff; }
.nav-toggle { display: none; background: none; border: 0; color: #fff; cursor: pointer; padding: var(--s-2); }

.topbar.is-stuck {
  background: rgba(255, 255, 255, .9);
  backdrop-filter: blur(14px) saturate(150%);
  border-bottom-color: var(--c-line);
}
.topbar.is-stuck .brand img { filter: invert(1); }
.topbar.is-stuck .nav a { color: var(--c-text-soft); }
.topbar.is-stuck .nav a:hover { color: var(--c-text); }
.topbar.is-stuck .nav-toggle { color: var(--c-text); }
.topbar.is-stuck .btn { border-color: var(--c-line); color: var(--c-text); }

/* ---------- botones ---------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--s-3);
  font-family: var(--font-mono); font-size: var(--fs-xs);
  text-transform: uppercase; letter-spacing: .14em;
  padding: var(--s-4) var(--s-6);
  border: 1px solid var(--c-line); background: transparent; color: var(--c-text);
  cursor: pointer; white-space: nowrap; position: relative; overflow: hidden;
  transition: color var(--t-med) var(--ease), border-color var(--t-med) var(--ease);
}
/* El relleno entra desde la izquierda, como una barra de progreso. */
.btn::before {
  content: ""; position: absolute; inset: 0; background: var(--c-accent);
  transform: scaleX(0); transform-origin: left; z-index: 0;
  transition: transform var(--t-med) var(--ease-out);
}
.btn > span { position: relative; z-index: 1; }
.btn:hover { border-color: var(--c-accent); color: #0b0d10; }
.btn:hover::before { transform: scaleX(1); }

.btn-solid { background: var(--c-accent); border-color: var(--c-accent); color: #0b0d10; font-weight: 600; }
.btn-solid::before { background: #0b0d10; }
.btn-solid:hover { color: #fff; border-color: #0b0d10; }

/* Sobre el hero oscuro */
.on-dark .btn { border-color: rgba(255, 255, 255, .3); color: #fff; }
.on-dark .btn:hover { border-color: var(--c-accent); color: #0b0d10; }
.on-dark .btn-solid { border-color: var(--c-accent); color: #0b0d10; }
.on-dark .btn-solid::before { background: #fff; }
.on-dark .btn-solid:hover { color: #0b0d10; border-color: #fff; }

.btn-sm { padding: var(--s-2) var(--s-4); }

/* ---------- hero (oscuro) ---------- */

.hero {
  /* Pantalla completa por pedido de Carlos (2026-07-19): sin tope de altura. */
  position: relative; min-height: 100svh;
  display: flex; flex-direction: column; justify-content: flex-end;
  padding-top: calc(var(--bar) + var(--s-7));
  overflow: hidden; isolation: isolate; background: var(--c-ink);
}

.hero-bg { position: absolute; inset: 0; z-index: -3; }
.hero-bg img, .hero-bg video { width: 100%; height: 100%; object-fit: cover; }

/* Grade: la foto se hunde hacia la tinta. Unifica material de origen dispar
   (dron, celular) sin falsearlo. */
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(11,13,16,.62) 0%, rgba(11,13,16,.45) 38%, rgba(11,13,16,.94) 100%),
    linear-gradient(90deg, rgba(11,13,16,.9) 0%, rgba(11,13,16,.3) 58%, transparent 100%),
    radial-gradient(ellipse 70% 60% at 80% 30%, rgba(255,126,46,.14), transparent 70%);
}

/* Celosia: el travesaño de la "A" repetido. La estructura del logo,
   convertida en la trama del sitio. */
.lattice {
  position: absolute; inset: 0; z-index: -2; opacity: .5;
  background-image:
    linear-gradient(115deg, transparent 49.6%, rgba(255,255,255,.07) 49.6%, rgba(255,255,255,.07) 50.4%, transparent 50.4%),
    linear-gradient(65deg,  transparent 49.6%, rgba(255,255,255,.07) 49.6%, rgba(255,255,255,.07) 50.4%, transparent 50.4%);
  background-size: 92px 92px;
  mask-image: radial-gradient(ellipse 100% 90% at 70% 15%, #000 10%, transparent 72%);
}

.hero-inner { position: relative; padding-bottom: var(--s-7); color: #fff; }

.hero-title {
  font-size: var(--fs-hero); font-weight: 600; letter-spacing: -.045em;
  margin-block: var(--s-5) var(--s-5); max-width: 13ch; text-wrap: balance; color: #fff;
}
.hero-title em { font-style: normal; color: var(--c-accent); }

.hero-sub { font-size: var(--fs-md); color: rgba(255, 255, 255, .74); max-width: 50ch; text-wrap: pretty; }
.hero-cta { display: flex; flex-wrap: wrap; gap: var(--s-3); margin-top: var(--s-6); }

/* ---------- ficha tecnica del hero ---------- */

.spec { border-top: 1px solid rgba(255, 255, 255, .14); display: grid; grid-template-columns: repeat(3, 1fr); }
.spec-item { padding: var(--s-5) var(--s-5) var(--s-6) 0; }
.spec-item + .spec-item { padding-left: var(--s-5); border-left: 1px solid rgba(255, 255, 255, .14); }
.spec-v { font-size: var(--fs-lg); font-weight: 600; letter-spacing: -.04em; color: var(--c-accent); line-height: 1; }
.spec-l {
  font-family: var(--font-mono); font-size: var(--fs-xs); color: rgba(255, 255, 255, .5);
  text-transform: uppercase; letter-spacing: .14em; margin-top: var(--s-3);
}

/* ---------- secciones ---------- */

.section { padding-block: var(--s-9); position: relative; }
.section-alt { background: var(--c-surface-alt); border-block: 1px solid var(--c-line-soft); }
.section-ink { background: var(--c-ink); color: #fff; }
.section-ink .head h2 { color: #fff; }
.section-ink .head p { color: rgba(255, 255, 255, .68); }

.head { max-width: 58ch; margin-bottom: var(--s-8); }
.head h2 { font-size: var(--fs-2xl); margin-block: var(--s-4) var(--s-5); text-wrap: balance; }
.head p { color: var(--c-text-soft); font-size: var(--fs-md); text-wrap: pretty; }

/* ---------- pilares KONNECTA ---------- */

.pillars { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1px; background: var(--c-line); border: 1px solid var(--c-line); }
.pillar {
  background: var(--c-surface); padding: var(--s-6) var(--s-5);
  position: relative; transition: background var(--t-med) var(--ease);
}
.pillar:hover { background: var(--c-surface-alt); }
.pillar::after {
  content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 2px;
  background: var(--c-accent); transform: scaleX(0); transform-origin: left;
  transition: transform var(--t-med) var(--ease-out);
}
.pillar:hover::after { transform: scaleX(1); }
.pillar h3 { font-size: var(--fs-md); margin-block: var(--s-4) var(--s-3); }
.pillar p { font-size: var(--fs-sm); color: var(--c-text-soft); }

/* ---------- la cadena ---------- */

.chain { display: grid; grid-template-columns: repeat(4, 1fr); }
.chain-step {
  position: relative; padding: var(--s-7) var(--s-5) 0 0;
  border-top: 1px solid var(--c-line); transition: border-color var(--t-med) var(--ease);
}
.chain-step + .chain-step { padding-left: var(--s-5); }
/* Nodo triangular: la punta de la "A". */
.chain-step::before {
  content: ""; position: absolute; top: -5px; left: 0; width: 0; height: 0;
  border-left: 5px solid transparent; border-right: 5px solid transparent;
  border-bottom: 9px solid var(--c-text-mute);
  transition: border-bottom-color var(--t-med) var(--ease), transform var(--t-med) var(--ease);
}
.chain-step + .chain-step::before { left: var(--s-5); }
.chain-step:hover { border-top-color: var(--c-accent); }
.chain-step:hover::before { border-bottom-color: var(--c-accent); transform: translateY(-3px); }

.chain-n { font-family: var(--font-mono); font-size: var(--fs-xs); color: var(--c-accent-deep); letter-spacing: .18em; }
.chain-t { font-size: var(--fs-lg); margin-block: var(--s-4) var(--s-4); }
.chain-d { font-size: var(--fs-sm); color: var(--c-text-soft); text-wrap: pretty; }

.section-ink .chain-step { border-top-color: rgba(255, 255, 255, .16); }
.section-ink .chain-n { color: var(--c-accent); }
.section-ink .chain-d { color: rgba(255, 255, 255, .66); }

/* ---------- soluciones ---------- */

.sols { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--c-line); border: 1px solid var(--c-line); }
.sol { background: var(--c-surface); padding: var(--s-7); position: relative; transition: background var(--t-med) var(--ease); }
.sol:hover { background: var(--c-surface-alt); }
.sol::after {
  content: ""; position: absolute; top: 0; left: 0; width: 2px; height: 100%;
  background: var(--c-accent); transform: scaleY(0); transform-origin: top;
  transition: transform var(--t-med) var(--ease-out);
}
.sol:hover::after { transform: scaleY(1); }
.sol h3 { font-size: var(--fs-lg); margin-block: var(--s-4) var(--s-4); }
.sol p { font-size: var(--fs-sm); color: var(--c-text-soft); text-wrap: pretty; }
.sol ul { margin-top: var(--s-5); display: grid; gap: var(--s-2); }
.sol li {
  font-family: var(--font-mono); font-size: var(--fs-xs); color: var(--c-text-mute);
  padding-left: var(--s-5); position: relative;
}
.sol li::before {
  content: ""; position: absolute; left: 0; top: .6em; width: 0; height: 0;
  border-left: 3px solid transparent; border-right: 3px solid transparent;
  border-bottom: 5px solid var(--c-accent);
}

/* ---------- evidencia ---------- */

.proof { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-4); }
.shot { position: relative; overflow: hidden; border: 1px solid var(--c-line); }
.shot img {
  width: 100%; aspect-ratio: 4 / 3; object-fit: cover;
  filter: saturate(.85) contrast(1.03);
  transition: filter var(--t-med) var(--ease), transform 600ms var(--ease-out);
}
.shot:hover img { filter: none; transform: scale(1.03); }
.shot figcaption {
  position: absolute; left: 0; bottom: 0; right: 0; padding: var(--s-4);
  background: linear-gradient(transparent, rgba(11, 13, 16, .88));
  font-family: var(--font-mono); font-size: var(--fs-xs); color: rgba(255, 255, 255, .85);
  letter-spacing: .1em; text-transform: uppercase;
}

/* ---------- metodo ---------- */

.step {
  display: grid; grid-template-columns: 96px 1fr; gap: var(--s-7);
  padding-block: var(--s-7); border-top: 1px solid var(--c-line); align-items: start;
}
.step-n { font-family: var(--font-mono); font-size: var(--fs-xl); color: var(--c-line); line-height: 1; }
.step h3 { font-size: var(--fs-lg); margin-bottom: var(--s-3); }
.step p { color: var(--c-text-soft); font-size: var(--fs-sm); max-width: 62ch; }

/* ---------- cierre ---------- */

.close {
  position: relative; overflow: hidden; background: var(--c-ink); color: #fff;
  padding: var(--s-9) var(--s-7);
}
.close .lattice { opacity: .8; mask-image: radial-gradient(ellipse 80% 100% at 90% 50%, #000, transparent 70%); }
.close h2 { font-size: var(--fs-2xl); max-width: 18ch; text-wrap: balance; color: #fff; margin-top: var(--s-4); }
.close p { color: rgba(255, 255, 255, .7); margin-block: var(--s-5) var(--s-7); max-width: 52ch; }

/* ---------- footer (oscuro) ---------- */

.footer { background: var(--c-ink); color: rgba(255, 255, 255, .6); padding-block: var(--s-8) var(--s-6); }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: var(--s-7); padding-bottom: var(--s-8); }
.footer h4 {
  font-family: var(--font-mono); font-size: var(--fs-xs); font-weight: 400;
  text-transform: uppercase; letter-spacing: .18em; color: rgba(255, 255, 255, .38);
  margin: 0 0 var(--s-5);
}
.footer li { margin-bottom: var(--s-3); }
.footer a { font-size: var(--fs-sm); color: rgba(255, 255, 255, .72); transition: color var(--t-fast) var(--ease); }
.footer a:hover { color: var(--c-accent); }
.footer-word { height: 15px; width: auto; margin-bottom: var(--s-5); }
.footer-note { font-size: var(--fs-sm); color: rgba(255, 255, 255, .5); max-width: 40ch; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .12); padding-top: var(--s-5);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--s-4);
  font-family: var(--font-mono); font-size: var(--fs-xs); color: rgba(255, 255, 255, .4);
  letter-spacing: .08em;
}

/* ---------- reveal ---------- */

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s var(--ease-out), transform .7s var(--ease-out); }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }

/* ---------- responsive ---------- */

@media (max-width: 1060px) {
  .pillars { grid-template-columns: repeat(3, 1fr); }
  .chain { grid-template-columns: repeat(2, 1fr); }
  .chain-step:nth-child(3) { padding-left: 0; }
  .chain-step:nth-child(3)::before { left: 0; }
  .proof { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 680px) {
  :root { --fs-hero: clamp(2.2rem, 10vw, 3.2rem); }
  /* El <br> del titulo fuerza "Seguridad y energia" en una linea; en un
     iPhone de 375px eso desborda por un pelo. En movil que fluya libre. */
  .hero-title br { display: none; }
  .nav { display: none; }
  .nav.is-open {
    display: flex; flex-direction: column; align-items: stretch; gap: var(--s-2);
    position: fixed; top: var(--bar); left: 0; right: 0;
    background: var(--c-surface); border-bottom: 1px solid var(--c-line); padding: var(--s-5);
    box-shadow: var(--sh-2);
  }
  .nav.is-open a { padding: var(--s-3) 0; font-size: var(--fs-md); color: var(--c-text); }
  .nav.is-open .btn { border-color: var(--c-line); color: var(--c-text); }
  .nav-toggle { display: block; }
  .hero-title { max-width: none; }
  .spec { grid-template-columns: 1fr; }
  .spec-item + .spec-item { padding-left: 0; border-left: 0; border-top: 1px solid rgba(255, 255, 255, .14); }
  .spec-item { padding-block: var(--s-4); }
  .pillars, .chain, .sols, .footer-grid { grid-template-columns: 1fr; }
  .chain-step + .chain-step { padding-left: 0; }
  .chain-step + .chain-step::before { left: 0; }
  .step { grid-template-columns: 1fr; gap: var(--s-3); }
  .close { padding: var(--s-7) var(--s-5); }
}

/* ============================================================
   Formulario de contacto
   ============================================================ */

.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: var(--s-9); align-items: start; }

.contact-list { display: grid; gap: var(--s-5); margin-top: var(--s-7); }
.contact-list li { display: grid; gap: var(--s-2); }
.contact-list a { color: var(--c-text); border-bottom: 1px solid var(--c-line); transition: border-color var(--t-fast) var(--ease); }
.contact-list a:hover { border-bottom-color: var(--c-accent); }

.form {
  background: var(--c-surface-alt);
  border: 1px solid var(--c-line);
  padding: var(--s-7);
  display: grid; gap: var(--s-5);
}

.field { display: grid; gap: var(--s-2); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-4); }

.field label {
  font-family: var(--font-mono); font-size: var(--fs-xs);
  text-transform: uppercase; letter-spacing: .14em; color: var(--c-text-soft);
}
.field label span { color: var(--c-accent-deep); }

.field input, .field select, .field textarea {
  font-family: var(--font-body); font-size: var(--fs-base); color: var(--c-text);
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  padding: var(--s-3) var(--s-4);
  width: 100%;
  transition: border-color var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}
.field textarea { resize: vertical; min-height: 96px; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(255, 126, 46, .16);
}
/* aria-invalid lo pone el JS: el estado de error vive en el atributo, no en
   una clase paralela que se pueda desincronizar. */
.field [aria-invalid="true"] { border-color: #c8331f; }
.field-err { font-size: var(--fs-xs); color: #c8331f; min-height: 1em; }

.form-sep { border: 0; border-top: 1px solid var(--c-line); margin: var(--s-2) 0 0; }
.form-note {
  font-family: var(--font-mono); font-size: var(--fs-xs); color: var(--c-text-mute);
  text-transform: uppercase; letter-spacing: .18em;
}

/* Honeypot: fuera de pantalla, no display:none — algunos bots ignoran lo oculto. */
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.form button[type="submit"] { justify-self: start; margin-top: var(--s-2); }
.form button[disabled] { opacity: .55; cursor: not-allowed; }

.form-status { font-size: var(--fs-sm); min-height: 1.4em; }
.form-status.ok { color: #1c7a4a; }
.form-status.err { color: #c8331f; }

@media (max-width: 900px) {
  .contact-grid { grid-template-columns: 1fr; gap: var(--s-7); }
}
@media (max-width: 680px) {
  .field-row { grid-template-columns: 1fr; }
  .form { padding: var(--s-5); }
}

/* ============================================================
   Home cinetico — torre viva, monitor, rail, faq.
   (El ticker de tecnologias existio y Carlos lo quito el 2026-07-19.)
   Todo aditivo: las paginas internas no usan nada de esto.
   ============================================================ */

::selection { background: var(--c-accent); color: #0b0d10; }

/* Transiciones entre paginas (View Transitions). Chrome/Edge las animan;
   el resto navega normal. */
@view-transition { navigation: auto; }
@media (prefers-reduced-motion: no-preference) {
  ::view-transition-old(root) { animation: vt-out .16s var(--ease) both; }
  ::view-transition-new(root) { animation: vt-in .26s var(--ease-out) both; }
}
@keyframes vt-out { to { opacity: 0; transform: translateY(-6px); } }
@keyframes vt-in { from { opacity: 0; transform: translateY(10px); } }

/* ---------- barra de progreso de lectura ---------- */

.progress {
  position: fixed; top: 0; left: 0; right: 0; height: 2px; z-index: 80;
  background: var(--c-accent);
  transform: scaleX(var(--sp, 0)); transform-origin: left;
  pointer-events: none;
}

/* ---------- rail de capitulos ---------- */

.rail {
  position: fixed; left: var(--s-5); top: 50%; transform: translateY(-50%);
  z-index: 40; display: grid; gap: var(--s-3);
  mix-blend-mode: difference;
  /* Sobre el hero estorba: se monta encima del titulo y ningun capitulo esta
     activo. Aparece al entrar a los capitulos (la clase la pone initTopbar). */
  opacity: 0; pointer-events: none;
  transition: opacity var(--t-med) var(--ease);
}
.is-scrolled .rail { opacity: 1; pointer-events: auto; }
.rail a {
  display: flex; align-items: center; gap: var(--s-2);
  font-family: var(--font-mono); font-size: 10px;
  text-transform: uppercase; letter-spacing: .16em;
  color: #fff; opacity: .38;
  transition: opacity var(--t-fast) var(--ease);
}
.rail a span { font-size: 9px; }
.rail a::before {
  content: ""; width: 12px; height: 1px; background: currentColor; flex: none;
  transition: width var(--t-med) var(--ease);
}
.rail a:hover { opacity: .8; }
.rail a.is-active { opacity: 1; }
.rail a.is-active::before { width: 26px; }
@media (max-width: 1380px) { .rail { display: none; } }

/* ---------- hero cinetico ---------- */

.hero-title .w { display: inline-block; }
@media (prefers-reduced-motion: no-preference) {
  .hero-title .w {
    opacity: 0; transform: translateY(26px);
    animation: w-in .7s var(--ease-out) forwards;
    animation-delay: var(--d, 0s);
  }
  .hero-sub, .hero-cta {
    opacity: 0; transform: translateY(14px);
    animation: w-in .7s var(--ease-out) forwards;
  }
  .hero-sub { animation-delay: .5s; }
  .hero-cta { animation-delay: .62s; }
  /* Parallax: la foto se hunde y abre mientras el hero sale de cuadro. */
  .hero-bg img, .hero-bg video {
    transform: translateY(calc(var(--sy, 0) * 46px)) scale(1.06);
    will-change: transform;
  }
}
@keyframes w-in { to { opacity: 1; transform: none; } }

/* La celosia "detecta" el cursor: una segunda capa mas brillante, enmascarada
   a un circulo que sigue al mouse. Solo dispositivos con hover. */
.lattice-hot { display: none; }
@media (hover: hover) and (prefers-reduced-motion: no-preference) {
  .lattice-hot {
    display: block; opacity: 1;
    background-image:
      linear-gradient(115deg, transparent 49.5%, rgba(255,126,46,.34) 49.5%, rgba(255,126,46,.34) 50.5%, transparent 50.5%),
      linear-gradient(65deg,  transparent 49.5%, rgba(255,126,46,.34) 49.5%, rgba(255,126,46,.34) 50.5%, transparent 50.5%);
    -webkit-mask-image: radial-gradient(240px at var(--mx, -999px) var(--my, 50%), #000 0%, transparent 70%);
    mask-image: radial-gradient(240px at var(--mx, -999px) var(--my, 50%), #000 0%, transparent 70%);
  }
}

/* Pulso del perimetro bajo el CTA (reusa la animacion sweep del boton no —
   es la linea con destello que ya existia). */
.pulse {
  position: relative; height: 1px; background: rgba(255, 255, 255, .16);
  margin-top: var(--s-7); overflow: hidden;
}
.pulse::after {
  content: ""; position: absolute; top: 0; left: 0; height: 100%; width: 30%;
  background: linear-gradient(90deg, transparent, var(--c-accent), transparent);
  animation: sweep 4.5s var(--ease-out) infinite;
}
@keyframes sweep {
  0% { transform: translateX(-100%); opacity: 0; }
  15% { opacity: 1; }
  75% { opacity: 1; }
  100% { transform: translateX(430%); opacity: 0; }
}
@media (prefers-reduced-motion: reduce) { .pulse::after { animation: none; } }

/* ---------- chain de 3 columnas (seccion problema) ---------- */

.chain--3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 1060px) { .chain--3 { grid-template-columns: 1fr; } }

/* ---------- la torre viva ---------- */

.torre { background: var(--c-ink); color: #fff; --p0: 1; --p1: 1; --p2: 1; --p3: 1; }
.torre .head h2 { color: #fff; }
.torre .head p { color: rgba(255, 255, 255, .68); }

.torre-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-8); align-items: start; }

.torre-sticky {
  position: sticky; top: calc(var(--bar) + var(--s-5));
  height: calc(100svh - var(--bar) - var(--s-7));
  display: flex; align-items: center; justify-content: center;
}
.torre-sticky svg { width: 100%; height: 100%; max-height: 640px; }

.torre-hud {
  position: absolute; top: 0; left: 0; right: 0;
  display: flex; justify-content: space-between;
  font-family: var(--font-mono); font-size: var(--fs-xs);
  text-transform: uppercase; letter-spacing: .16em;
  color: rgba(255, 255, 255, .45);
}
.torre-hud b { color: var(--c-accent); font-weight: 500; font-variant-numeric: tabular-nums; }

/* Dibujo por trazo: cada forma tiene pathLength=1; el offset baja de 1 a 0
   con las variables --p0..--p3 que alimenta el scroll. Los grupos .d1/.d2/.d3
   escalonan el dibujo DENTRO de cada etapa. */
.torre svg * { fill: none; stroke-linecap: round; stroke-linejoin: round; }
.torre svg .stW { stroke: rgba(255, 255, 255, .4); }
.torre svg .stO { stroke: var(--c-accent); }
.torre svg .stG { stroke: rgba(255, 255, 255, .3); }
.torre svg .sw1 { stroke-width: 1; }
.torre svg .sw15 { stroke-width: 1.5; }
.torre svg .sw2 { stroke-width: 2; }

.g0 { --pg: var(--p0); opacity: calc(1 - var(--p1) * .82); }
.g1 { --pg: var(--p1); }
.g2 { --pg: var(--p2); }
.g3 { --pg: var(--p3); }

.torre svg .d1, .torre svg .d2, .torre svg .d3 { stroke-dasharray: 1; }
.torre svg .d1 { stroke-dashoffset: calc(1 - clamp(0, calc(var(--pg) * 1.6), 1)); }
.torre svg .d2 { stroke-dashoffset: calc(1 - clamp(0, calc(var(--pg) * 1.7 - .35), 1)); }
.torre svg .d3 { stroke-dashoffset: calc(1 - clamp(0, calc(var(--pg) * 1.7 - .7), 1)); }

.torre svg .t-txt {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .14em;
  fill: rgba(255, 255, 255, .4); stroke: none;
}
.torre svg .fillO { fill: var(--c-accent); stroke: none; opacity: var(--p3); }

/* En operacion (is-live) el sitio respira: pulsos y baliza. */
@media (prefers-reduced-motion: no-preference) {
  .torre.is-live svg .pulso { animation: latido 2.6s var(--ease) infinite; }
  .torre.is-live svg .fillO { animation: baliza 2.6s var(--ease) infinite; }
  .torre.is-live svg .d2.pulso { animation-delay: .3s; }
  .torre.is-live svg .d3.pulso { animation-delay: .6s; }
}
@keyframes latido { 0%, 100% { opacity: 1; } 50% { opacity: .25; } }
@keyframes baliza { 0%, 100% { opacity: 1; } 50% { opacity: .4; } }

.t-steps { display: grid; }
.t-step {
  min-height: 86svh;
  display: flex; flex-direction: column; justify-content: center;
  border-top: 1px solid rgba(255, 255, 255, .14);
  opacity: .3;
  transition: opacity .45s var(--ease);
}
.t-step.is-active { opacity: 1; }
.t-step .chain-n { color: var(--c-accent); }
.t-step .chain-t { color: #fff; }
.t-step .chain-d { color: rgba(255, 255, 255, .66); max-width: 44ch; }

@media (max-width: 900px) {
  .torre-grid { grid-template-columns: 1fr; gap: var(--s-5); }
  .torre-sticky { height: 46svh; top: var(--bar); z-index: 5; background: var(--c-ink); }
  .torre-hud { position: static; margin-bottom: var(--s-2); }
  .torre-sticky { flex-direction: column; }
  .t-step { min-height: 62svh; }
}

/* ---------- centro de monitoreo (demo) ---------- */

.mon { background: #0d0f13; color: #fff; border-top: 1px solid rgba(255, 255, 255, .08); }
.mon .head h2 { color: #fff; }
.mon .head p { color: rgba(255, 255, 255, .68); }

.chip {
  display: inline-block;
  font-family: var(--font-mono); font-size: 10px;
  text-transform: uppercase; letter-spacing: .16em;
  color: var(--c-accent);
  border: 1px solid rgba(255, 126, 46, .4);
  padding: 3px 8px; border-radius: 2px;
}

.mon-grid { display: grid; grid-template-columns: minmax(0, 420px) 1fr; gap: var(--s-7); align-items: stretch; }

.mon-radar {
  position: relative; aspect-ratio: 1; max-width: 420px; width: 100%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 126, 46, .05), transparent 70%);
  overflow: hidden;
}
.mon-radar .ring {
  position: absolute; border: 1px solid rgba(255, 255, 255, .14); border-radius: 50%;
}
.mon-radar .r1 { inset: 0; }
.mon-radar .r2 { inset: 17%; }
.mon-radar .r3 { inset: 34%; }
.mon-radar .cross-h, .mon-radar .cross-v {
  position: absolute; background: rgba(255, 255, 255, .1);
}
.mon-radar .cross-h { left: 0; right: 0; top: 50%; height: 1px; }
.mon-radar .cross-v { top: 0; bottom: 0; left: 50%; width: 1px; }
.mon-radar .sweep {
  position: absolute; inset: 0; border-radius: 50%;
  background: conic-gradient(from 0deg, rgba(255, 126, 46, .4), transparent 70deg);
}
@media (prefers-reduced-motion: no-preference) {
  .mon-radar .sweep { animation: girar 4.5s linear infinite; }
}
@keyframes girar { to { transform: rotate(360deg); } }
.mon-radar .core {
  position: absolute; left: 50%; top: 50%; width: 6px; height: 6px;
  margin: -3px; border-radius: 50%; background: var(--c-accent);
}
.mon-radar .blip {
  position: absolute; width: 7px; height: 7px; border-radius: 50%;
  background: var(--c-accent);
}
.mon-radar .b1 { left: 66%; top: 30%; }
.mon-radar .b2 { left: 28%; top: 62%; }
.mon-radar .b3 { left: 58%; top: 74%; }
@media (prefers-reduced-motion: no-preference) {
  .mon-radar .blip { animation: blip 3.2s var(--ease) infinite; }
  .mon-radar .b2 { animation-delay: 1s; }
  .mon-radar .b3 { animation-delay: 2.1s; }
}
@keyframes blip {
  0%, 100% { opacity: .15; box-shadow: 0 0 0 0 rgba(255, 126, 46, .5); }
  22% { opacity: 1; box-shadow: 0 0 0 12px rgba(255, 126, 46, 0); }
}

.mon-log {
  border: 1px solid rgba(255, 255, 255, .12);
  display: flex; flex-direction: column; min-height: 300px;
  background: rgba(255, 255, 255, .02);
}
.mon-log-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: var(--s-4) var(--s-5);
  border-bottom: 1px solid rgba(255, 255, 255, .12);
  font-family: var(--font-mono); font-size: var(--fs-xs);
  text-transform: uppercase; letter-spacing: .16em;
  color: rgba(255, 255, 255, .5);
}
.mon-log ol { padding: var(--s-3) var(--s-5); display: grid; gap: var(--s-3); }
.mon-log li {
  font-family: var(--font-mono); font-size: var(--fs-sm);
  color: rgba(255, 255, 255, .74);
  display: flex; gap: var(--s-4); align-items: baseline;
}
.mon-log li .t { color: rgba(255, 255, 255, .38); font-size: var(--fs-xs); flex: none; font-variant-numeric: tabular-nums; }
.mon-log li.warn { color: var(--c-accent-soft, #ffb347); }
.mon-log li.you { color: var(--c-accent); }
@media (prefers-reduced-motion: no-preference) {
  .mon-log li { animation: fila .4s var(--ease-out); }
}
@keyframes fila { from { opacity: 0; transform: translateY(-6px); } }

.mon-funnel {
  margin-top: var(--s-7); padding-top: var(--s-6);
  border-top: 1px solid rgba(255, 255, 255, .12);
  display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-6);
}
.fun-v {
  font-size: var(--fs-2xl); font-weight: 600; letter-spacing: -.04em;
  color: #fff; font-variant-numeric: tabular-nums;
}
.fun.warn .fun-v { color: var(--c-accent); }
.fun-l { font-size: var(--fs-sm); color: rgba(255, 255, 255, .55); margin-block: var(--s-2) var(--s-3); }
.fun-bar { height: 3px; background: rgba(255, 255, 255, .1); overflow: hidden; }
.fun-bar i { display: block; height: 100%; width: 0; background: #fff; transition: width 1.1s var(--ease-out); }
.fun.warn .fun-bar i { background: var(--c-accent); }
.fun-note {
  grid-column: 1 / -1;
  font-family: var(--font-mono); font-size: var(--fs-xs);
  color: rgba(255, 255, 255, .4); letter-spacing: .08em;
}

@media (max-width: 900px) {
  .mon-grid { grid-template-columns: 1fr; }
  .mon-radar { margin-inline: auto; }
  .mon-funnel { grid-template-columns: 1fr; gap: var(--s-5); }
}

/* ---------- faq ---------- */

.faqs { border-bottom: 1px solid var(--c-line); }
.faq { border-top: 1px solid var(--c-line); }
.faq summary {
  display: flex; justify-content: space-between; align-items: center; gap: var(--s-5);
  padding-block: var(--s-5);
  font-size: var(--fs-md); font-weight: 600; color: var(--c-text);
  cursor: pointer; list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; flex: none; width: 0; height: 0;
  border-left: 5px solid transparent; border-right: 5px solid transparent;
  border-top: 7px solid var(--c-accent);
  transition: transform var(--t-med) var(--ease);
}
.faq[open] summary::after { transform: rotate(180deg); }
.faq p { padding-bottom: var(--s-5); color: var(--c-text-soft); max-width: 68ch; }

/* ============================================================
   Antes/Despues (cmp) — slider de comparacion en #evidencia.
   El control accesible ES el <input type=range> invisible que cubre
   todo el escenario: tactil, teclado y screen reader gratis.
   ============================================================ */

.cmp { margin-bottom: var(--s-6); }

.cmp-stage {
  position: relative; aspect-ratio: 4 / 3; overflow: hidden;
  border: 1px solid var(--c-line);
}
.cmp-stage > img, .cmp-clip img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
}
/* La foto "antes" vive recortada a la izquierda de la linea. */
.cmp-clip {
  position: absolute; inset: 0;
  clip-path: inset(0 calc(100% - var(--x, 50%)) 0 0);
}

.cmp-line {
  position: absolute; top: 0; bottom: 0; left: var(--x, 50%); width: 2px;
  background: var(--c-accent); transform: translateX(-1px);
  pointer-events: none;
}
.cmp-grip {
  position: absolute; top: 50%; left: 50%; translate: -50% -50%;
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--c-ink); border: 1px solid var(--c-accent);
  display: flex; align-items: center; justify-content: center; gap: 5px;
}
/* Dos puntas de la "A", enfrentadas: el gesto de arrastrar. */
.cmp-grip::before, .cmp-grip::after {
  content: ""; width: 0; height: 0;
  border-top: 5px solid transparent; border-bottom: 5px solid transparent;
}
.cmp-grip::before { border-right: 7px solid var(--c-accent); }
.cmp-grip::after { border-left: 7px solid var(--c-accent); }

.cmp-tag {
  position: absolute; top: var(--s-4);
  font-family: var(--font-mono); font-size: var(--fs-xs);
  text-transform: uppercase; letter-spacing: .14em;
  color: #fff; background: rgba(11, 13, 16, .72); padding: 4px 10px;
  pointer-events: none;
}
.cmp-tag-a { left: var(--s-4); }
.cmp-tag-b { right: var(--s-4); }

.cmp-range {
  position: absolute; inset: 0; width: 100%; height: 100%; margin: 0;
  opacity: 0; cursor: ew-resize;
  -webkit-appearance: none; appearance: none; background: transparent;
}
/* El thumb se estira mas alto que el escenario: agarrar en cualquier
   altura funciona. Es invisible, el grip visible es .cmp-grip. */
.cmp-range::-webkit-slider-thumb {
  -webkit-appearance: none; width: 44px; height: 1200px;
}
.cmp-range::-moz-range-thumb {
  width: 44px; height: 1200px; border: 0; background: transparent;
}
.cmp-stage:has(.cmp-range:focus-visible) {
  outline: 2px solid var(--c-accent-deep); outline-offset: 3px;
}
.cmp > figcaption { margin-top: var(--s-3); }

/* ============================================================
   Integrador vs Nexakon (vs) — tabla comparativa.
   Tabla semantica real: la comparacion ES tabular y los screen readers
   la leen con scopes. Nada de divs disfrazados.
   ============================================================ */

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  clip-path: inset(50%); overflow: hidden; white-space: nowrap;
}

/* El atributo hidden pierde contra cualquier display explicito (los .btn son
   inline-flex, los .tag tambien). Esta regla lo hace ganar SIEMPRE. */
[hidden] { display: none !important; }

/* En pantallas angostas la tabla scrollea horizontal dentro de su marco;
   tabindex=0 en el contenedor la hace alcanzable por teclado. */
.vs-scroll { overflow-x: auto; }
.vs-scroll:focus-visible { outline: 2px solid var(--c-accent-deep); outline-offset: 3px; }

.vs-table {
  width: 100%; min-width: 640px;
  border-collapse: collapse;
  background: var(--c-surface);
}
.vs-table th, .vs-table td {
  border: 1px solid var(--c-line);
  padding: var(--s-4) var(--s-5);
  text-align: left; vertical-align: top;
  font-size: var(--fs-sm);
}
.vs-table thead th {
  font-family: var(--font-mono); font-size: var(--fs-xs); font-weight: 500;
  text-transform: uppercase; letter-spacing: .14em; color: var(--c-text-soft);
}
.vs-table tbody th {
  font-weight: 600; color: var(--c-text); width: 26%;
  background: var(--c-surface-alt);
}
/* La columna del integrador se apaga; la de Nexakon carga el acento. */
.vs-table td { color: var(--c-text-mute); width: 37%; }
.vs-table td.vs-nx { color: var(--c-text); position: relative; padding-left: calc(var(--s-5) + 14px); }
.vs-table thead th.vs-nx { color: var(--c-accent-deep); border-top: 2px solid var(--c-accent); }
/* Check triangular: la punta de la "A". */
.vs-table td.vs-nx::before {
  content: ""; position: absolute; left: var(--s-5); top: calc(var(--s-4) + .45em);
  width: 0; height: 0;
  border-left: 4px solid transparent; border-right: 4px solid transparent;
  border-bottom: 7px solid var(--c-accent);
}

/* ============================================================
   Anatomia del sitio (anat) — hotspots sobre foto real, /servicios.
   Las posiciones --hx/--hy son % de la imagen SIN recortar: nada de
   object-fit cover ni crops por breakpoint, o los puntos se corren.
   ============================================================ */

.anat { display: grid; grid-template-columns: 1.5fr .9fr; gap: var(--s-6); align-items: start; }

.anat-stage { position: relative; border: 1px solid var(--c-line); }
.anat-stage img { width: 100%; height: auto; display: block; }

.hs {
  position: absolute; left: var(--hx); top: var(--hy); translate: -50% -50%;
  width: 44px; height: 44px;                 /* zona tactil AA */
  background: none; border: 0; padding: 0; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
}
.hs::before {
  content: ""; width: 12px; height: 12px; border-radius: 50%;
  background: var(--c-accent); border: 2px solid #fff;
  box-shadow: 0 1px 6px rgba(11, 13, 16, .5);
  transition: transform var(--t-fast) var(--ease);
}
.hs-ring {
  position: absolute; width: 26px; height: 26px; border-radius: 50%;
  border: 1px solid rgba(255, 126, 46, .8);
}
/* El anillo late reusando la keyframe blip del radar; con reduced-motion
   queda estatico pero SIEMPRE visible: el marcador no depende del latido. */
@media (prefers-reduced-motion: no-preference) {
  .hs-ring { animation: blip 3.2s var(--ease) infinite; }
}
.hs:hover::before, .hs[aria-expanded="true"]::before { transform: scale(1.35); }
.hs[aria-expanded="true"] .hs-ring { border-color: #fff; animation: none; }
.hs:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 2px; border-radius: 50%; }

.anat-panel { min-height: 240px; }
.anat-card {
  border: 1px solid var(--c-line); background: var(--c-surface-alt);
  padding: var(--s-6); border-top: 2px solid var(--c-accent);
}
.anat-card .chain-t { margin-block: var(--s-3); }

@media (max-width: 900px) {
  .anat { grid-template-columns: 1fr; }
  .anat-panel { min-height: 200px; }
}

/* ============================================================
   Gemelo digital (twin) — /servicios, seccion SECUREX.
   Sin data-glb el plano isometrico ES la experiencia; con data-glb
   aparece el boton y el visor (vendorizado) se carga on-click.
   ============================================================ */

.twin {
  margin-top: var(--s-7);
  display: grid; grid-template-columns: 1.3fr .9fr; gap: var(--s-7);
  background: var(--c-ink); border: 1px solid var(--c-line);
  padding: var(--s-7); align-items: center;
}
.twin-stage { position: relative; aspect-ratio: 4 / 3; }
.twin-stage svg { width: 100%; height: 100%; }
.twin-stage model-viewer { width: 100%; height: 100%; --poster-color: transparent; }

/* Mismo vocabulario de trazo que la torre viva */
.tw path, .tw line, .tw circle { fill: none; stroke-linecap: round; stroke-linejoin: round; }
.tw .stW { stroke: rgba(255, 255, 255, .42); }
.tw .stO { stroke: var(--c-accent); }
.tw .sw1 { stroke-width: 1; }
.tw .sw15 { stroke-width: 1.5; }
.tw .sw2 { stroke-width: 2; }
.tw .t-txt {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .14em;
  fill: rgba(255, 255, 255, .45); stroke: none;
}

.twin-side .chain-t { color: #fff; margin-block: var(--s-3); }
.twin-side .chain-d { color: rgba(255, 255, 255, .66); margin-bottom: var(--s-5); }
.twin-side .btn { border-color: rgba(255, 255, 255, .3); color: #fff; }
.twin-side .btn:hover { border-color: var(--c-accent); color: #0b0d10; }
.twin-note { color: rgba(255, 255, 255, .5); position: absolute; bottom: 0; left: 0; }
.twin-live { position: absolute; }

@media (max-width: 900px) {
  .twin { grid-template-columns: 1fr; padding: var(--s-5); gap: var(--s-5); }
}

/* ============================================================
   Anatomia de un evento (tl) — linea de tiempo con fotogramas reales.
   Seccion oscura (hereda .mon); las fotos van en duotono horneado.
   ============================================================ */

.evento { border-top: 1px solid rgba(255, 255, 255, .08); }

.tl { display: grid; gap: var(--s-7); counter-reset: none; }

.tl-step {
  display: grid; grid-template-columns: 110px 1fr 1.1fr; gap: var(--s-6);
  align-items: start;
  border-top: 1px solid rgba(255, 255, 255, .14); padding-top: var(--s-6);
  position: relative;
}
/* Nodo triangular sobre la linea: mismo gesto que la cadena. */
.tl-step::before {
  content: ""; position: absolute; top: -5px; left: 0; width: 0; height: 0;
  border-left: 5px solid transparent; border-right: 5px solid transparent;
  border-bottom: 9px solid var(--c-accent);
}
.tl-t {
  font-family: var(--font-mono); font-size: var(--fs-md); color: var(--c-accent);
  font-variant-numeric: tabular-nums; letter-spacing: .04em;
}
.tl-step .chain-t { color: #fff; margin-block: 0 var(--s-3); }
.tl-step .chain-d { color: rgba(255, 255, 255, .66); max-width: 42ch; }

.tl-fig { position: relative; border: 1px solid rgba(255, 255, 255, .14); }
.tl-fig img { width: 100%; height: auto; display: block; }
.tl-fig figcaption {
  font-family: var(--font-mono); font-size: var(--fs-xs);
  text-transform: uppercase; letter-spacing: .14em;
  color: rgba(255, 255, 255, .4);
  padding: var(--s-3) var(--s-4);
  border-top: 1px solid rgba(255, 255, 255, .12);
}

/* Marcador de deteccion: 4 esquinas en corchete, reconstruido sobre la
   posicion real del recuadro de la analitica (rotulado en el figcaption). */
.tl-mark {
  position: absolute; left: var(--mx); top: var(--my);
  width: 64px; height: 88px; translate: -50% -50%;
  background:
    linear-gradient(var(--c-accent), var(--c-accent)) left top / 14px 2px,
    linear-gradient(var(--c-accent), var(--c-accent)) left top / 2px 14px,
    linear-gradient(var(--c-accent), var(--c-accent)) right top / 14px 2px,
    linear-gradient(var(--c-accent), var(--c-accent)) right top / 2px 14px,
    linear-gradient(var(--c-accent), var(--c-accent)) left bottom / 14px 2px,
    linear-gradient(var(--c-accent), var(--c-accent)) left bottom / 2px 14px,
    linear-gradient(var(--c-accent), var(--c-accent)) right bottom / 14px 2px,
    linear-gradient(var(--c-accent), var(--c-accent)) right bottom / 2px 14px;
  background-repeat: no-repeat;
}
@media (prefers-reduced-motion: no-preference) {
  .tl-mark { animation: latido 2.6s var(--ease) infinite; }
}

.tl-card {
  display: flex; flex-direction: column; gap: var(--s-4);
  justify-content: center; align-items: flex-start;
  padding: var(--s-7); min-height: 240px;
  background: rgba(255, 255, 255, .02);
}
.tl-card .pulse { width: 100%; margin-top: var(--s-4); }

.tl-log { min-height: 0; }

@media (max-width: 900px) {
  .tl-step { grid-template-columns: 1fr; gap: var(--s-4); }
  .tl-step .chain-d { max-width: none; }
}