/* KONDOR · sitio institucional
   Reglas visuales: brandbook KONDOR (agosto 2026), §24–§34.
   Orden de capas: reset → tokens → base → layout → components → motion → utilities */
@layer reset, tokens, base, layout, components, motion, utilities;

/* Fuentes self-hosted (sin Google Fonts). Procedencia y licencias:
   assets/fonts/README.md. El archivo de Montserrat es una fuente variable
   con el eje wght completo; se declara solo el rango usado (300–600). */
@font-face {
  font-family: "Montserrat";
  font-style: normal;
  font-weight: 300 600;
  font-display: swap;
  src: url("../fonts/montserrat/montserrat-latin-400-500-600.woff2") format("woff2");
}
@font-face {
  font-family: "Lato";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/lato/lato-latin-400.woff2") format("woff2");
}

/* Métricas de respaldo para evitar saltos de diseño mientras cargan
   Montserrat y Lato (sustituto oficial: Helvetica o Arial, brandbook §29). */
@font-face {
  font-family: "Montserrat Fallback";
  src: local("Arial"), local("Helvetica");
  size-adjust: 113.4%;
  ascent-override: 85.4%;
  descent-override: 22.2%;
  line-gap-override: 0%;
}
@font-face {
  font-family: "Lato Fallback";
  src: local("Arial"), local("Helvetica");
  size-adjust: 97.4%;
  ascent-override: 101.6%;
  descent-override: 21.9%;
  line-gap-override: 0%;
}

@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  h1, h2, h3, p, ul, ol, figure { margin: 0; }
  ul, ol { padding: 0; list-style: none; }
  img { display: block; max-width: 100%; height: auto; }
  button, input, select, textarea { font: inherit; color: inherit; }
  a { color: inherit; text-decoration: none; }
}

@layer tokens {
  /* Paleta oficial (§28): 60 % blanco, 30 % negro, 10 % teal */
  :root {
    --teal: #009B9B;
    --teal-dark: #007A78;
    --black: #0D0D0D;
    --white: #FFFFFF;
    --gray: #A7A7A7;
    --gray-light: #E8E8E8;
    --ink-soft: rgba(13, 13, 13, .62);
    --line-dark: rgba(167, 167, 167, .24);

    --font-title: "Montserrat", "Montserrat Fallback", Helvetica, Arial, sans-serif;
    --font-body: "Lato", "Lato Fallback", Helvetica, Arial, sans-serif;
    --ease: cubic-bezier(.2, .7, .1, 1);

    --gutter: clamp(16px, 4vw, 56px);
    --max: 1360px;
    --header: 72px;

    color-scheme: light;
    interpolate-size: allow-keywords;
  }
}

@layer base {
  html { scroll-behavior: smooth; scroll-padding-top: var(--header); scrollbar-gutter: stable; }
  body {
    margin: 0;
    background: var(--white);
    color: var(--black);
    font: 400 16px/1.75 var(--font-body);
    -webkit-font-smoothing: antialiased;
    overflow-x: clip;
  }
  h1, h2, h3 { text-wrap: balance; }
  p { text-wrap: pretty; }
  :focus-visible { outline: 2px solid var(--teal); outline-offset: 3px; }
  ::selection { background: var(--teal); color: var(--white); }
}

@layer layout {
  .wrap { max-width: var(--max); margin-inline: auto; padding-inline: var(--gutter); }
  .section { padding-block: clamp(96px, 12vw, 168px); }
  .section.pt-0 { padding-block-start: 0; }
  .dark { background: var(--black); color: var(--white); }

  .sec-top { display: grid; grid-template-columns: 1fr 1fr; gap: 32px 64px; align-items: end; margin-block-end: 64px; }
  .sec-top .eyebrow { grid-column: 1 / -1; margin-block-end: -8px; }

  .diag { display: grid; grid-template-columns: 5fr 7fr; gap: clamp(32px, 5vw, 80px); align-items: start; }
  .ia-grid { display: grid; grid-template-columns: 5fr 7fr; gap: clamp(32px, 6vw, 96px); align-items: start; }
  .founders { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(24px, 4vw, 64px); }
  .contact-grid { display: grid; grid-template-columns: 5fr 7fr; gap: 40px clamp(32px, 6vw, 96px); margin-block-start: 56px; align-items: start; }

  @media (max-width: 900px) {
    .sec-top, .diag, .ia-grid, .founders, .contact-grid { grid-template-columns: 1fr; }
  }
}

@layer components {
  /* ---------- Tipografía (§29) ---------- */
  .eyebrow {
    font: 500 10.5px/1.6 var(--font-title);
    letter-spacing: .2em;
    text-transform: uppercase;
    color: var(--teal-dark);
  }
  .dark .eyebrow, .panel .eyebrow { color: var(--teal); }
  .h2 { font: 600 clamp(30px, 3.6vw, 48px)/1.08 var(--font-title); letter-spacing: -.02em; }
  .lede { font-size: 18px; line-height: 1.7; max-width: 46ch; }

  /* Icono lineal: trazo 1,5 px, extremos rectos (§32) */
  .ico { width: 16px; height: 16px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: square; stroke-linejoin: miter; }

  .skip {
    position: fixed; inset-block-start: 12px; inset-inline-start: 12px; z-index: 40;
    background: var(--black); color: var(--white); padding: 12px 16px;
    font: 500 10.5px/1 var(--font-title); letter-spacing: .2em; text-transform: uppercase;
    transform: translateY(-160%);
  }
  .skip:focus-visible { transform: none; }

  .progress {
    position: fixed; inset: 0 0 auto 0; height: 2px; z-index: 30;
    background: var(--teal); transform-origin: 0 50%; transform: scaleX(0);
  }

  /* ---------- Botones (§34): primario negro, secundario con borde ---------- */
  .btn {
    position: relative; isolation: isolate; overflow: hidden;
    display: inline-flex; align-items: center; gap: 14px;
    font: 500 10.5px/1 var(--font-title); letter-spacing: .2em; text-transform: uppercase;
    padding: 18px 26px; border: 1px solid var(--black); cursor: pointer;
    transition: color .45s var(--ease), border-color .45s var(--ease);
  }
  .btn::before {
    content: ""; position: absolute; inset: 0; z-index: -1;
    transform: scaleX(0); transform-origin: 100% 50%;
    transition: transform .55s var(--ease);
  }
  .btn .ico { transition: transform .45s var(--ease); }
  .btn--primary { background: var(--black); color: var(--white); }
  .btn--primary::before { background: var(--teal-dark); }
  .btn--ghost { background: transparent; color: var(--black); }
  .btn--ghost::before { background: var(--black); }
  .btn:focus-visible::before { transform: scaleX(1); transform-origin: 0 50%; }
  .btn--ghost:focus-visible { color: var(--white); }
  @media (hover: hover) {
    .btn:hover::before { transform: scaleX(1); transform-origin: 0 50%; }
    .btn:hover .ico { transform: translateX(4px); }
    .btn--primary:hover { border-color: var(--teal-dark); }
    .btn--ghost:hover { color: var(--white); }
  }
  .btn-row { display: flex; flex-wrap: wrap; gap: 12px; }

  /* Enlace con subrayado que se dibuja */
  .ulink { background: linear-gradient(currentColor, currentColor) 0 100% / 0 1px no-repeat; transition: background-size .45s var(--ease); }
  .ulink:focus-visible, .ulink[aria-current] { background-size: 100% 1px; }
  @media (hover: hover) { .ulink:hover { background-size: 100% 1px; } }

  /* ---------- Cabecera ---------- */
  .site-header {
    position: fixed; inset: 0 0 auto 0; z-index: 20; height: var(--header);
    background: var(--white); border-block-end: 1px solid var(--gray-light);
    transition: transform .45s var(--ease);
  }
  .site-header.is-hidden:not(:focus-within) { transform: translateY(-100%); }
  .site-header .wrap { height: 100%; display: flex; align-items: center; justify-content: space-between; }
  .logo { width: 148px; } /* mínimo digital: 140 px (§26) */
  .nav ul { display: flex; gap: 36px; }
  .nav a { font: 500 10.5px/1 var(--font-title); letter-spacing: .2em; text-transform: uppercase; padding-block: 10px; }
  .nav a[aria-current] { color: var(--teal-dark); }
  @media (hover: hover) { .nav a:hover { color: var(--teal-dark); } }
  .menu-btn {
    display: none; background: none; border: 1px solid var(--black); padding: 11px 14px; cursor: pointer;
    font: 500 10.5px/1 var(--font-title); letter-spacing: .2em; text-transform: uppercase;
  }

  /* Menú móvil con Popover API */
  #menu[popover] {
    inset: 0; width: 100%; height: 100dvh; max-width: none; max-height: none; margin: 0;
    border: 0; padding: 24px var(--gutter) 40px; background: var(--white); color: var(--black);
    opacity: 0; transform: translateY(-16px);
    transition: opacity .35s var(--ease), transform .35s var(--ease), display .35s allow-discrete, overlay .35s allow-discrete;
  }
  #menu:popover-open { opacity: 1; transform: none; display: flex; flex-direction: column; }
  @starting-style { #menu:popover-open { opacity: 0; transform: translateY(-16px); } }
  #menu .menu-close { display: block; align-self: flex-end; }
  #menu ul { margin-block-start: auto; }
  #menu li a { display: block; padding-block: 18px; border-block-end: 1px solid var(--gray-light); font: 500 30px/1.1 var(--font-title); letter-spacing: -.01em; }
  #menu .menu-foot { margin-block-start: 32px; font-size: 14px; color: var(--ink-soft); }

  /* ---------- Hero ---------- */
  .hero { min-height: 100svh; padding: calc(var(--header) + 40px) 0 28px; display: flex; flex-direction: column; }
  .hero .wrap { flex: 1; display: flex; flex-direction: column; width: 100%; }
  .hero-title { font: 500 clamp(44px, 6.6vw, 92px)/.98 var(--font-title); letter-spacing: -.035em; margin-block-start: auto; }
  .hero-title .accent { color: var(--teal-dark); }
  .hero-rule { height: 2px; width: 64px; background: var(--teal); margin-block-start: 40px; }
  .hero-foot { margin-block-start: 28px; display: grid; grid-template-columns: 1fr auto; gap: 32px; align-items: end; }
  .scroll-cue {
    margin-block-start: 40px; display: flex; align-items: center; gap: 16px; width: fit-content;
    font: 500 10.5px/1 var(--font-title); letter-spacing: .2em; text-transform: uppercase; color: var(--ink-soft);
  }
  .scroll-cue i { position: relative; display: block; width: 56px; height: 1px; background: var(--gray-light); overflow: hidden; }
  .scroll-cue i::after { content: ""; position: absolute; inset: 0; background: var(--black); }
  @media (max-width: 900px) { .hero-foot { grid-template-columns: 1fr; } }

  /* ---------- Propósito ---------- */
  .purpose { height: 220vh; position: relative; }
  .purpose-pin { position: sticky; top: 0; height: 100svh; display: flex; align-items: center; }
  .purpose .statement { font: 300 clamp(30px, 4.4vw, 62px)/1.14 var(--font-title); letter-spacing: -.02em; margin-block-start: 28px; max-width: 21ch; }
  .purpose-note { margin-block-start: 48px; max-width: 52ch; color: var(--gray); }
  @media (max-width: 900px) { .purpose { height: 180vh; } }

  /* ---------- Diagnóstico ---------- */
  .symptoms { border-block-start: 1px solid var(--black); }
  .symptom {
    position: relative; width: 100%; text-align: start; cursor: pointer;
    display: grid; grid-template-columns: 36px 1fr 16px; gap: 12px; align-items: center;
    padding: 22px 0; background: none; border: 0; border-block-end: 1px solid var(--gray-light);
    font: 500 17px/1.35 var(--font-title); color: var(--ink-soft);
    transition: color .3s var(--ease), padding .45s var(--ease);
  }
  .symptom::before {
    content: ""; position: absolute; inset-inline-start: 0; inset-block: -1px; width: 2px; background: var(--teal);
    transform: scaleY(0); transition: transform .45s var(--ease);
  }
  .symptom .n { font-size: 10.5px; letter-spacing: .2em; color: var(--teal-dark); }
  .symptom .ico { opacity: 0; transform: translateX(-6px); transition: opacity .3s, transform .45s var(--ease); }
  .symptom[aria-selected="true"] { color: var(--black); padding-inline-start: 18px; }
  .symptom[aria-selected="true"]::before { transform: scaleY(1); }
  .symptom[aria-selected="true"] .ico { opacity: 1; transform: none; }
  @media (hover: hover) { .symptom:hover { color: var(--black); } }

  .panel {
    position: sticky; top: calc(var(--header) + 32px);
    background: var(--black); color: var(--white);
    padding: clamp(28px, 4vw, 56px); min-height: 500px;
    display: flex; flex-direction: column;
  }
  .panel-title { font: 500 clamp(32px, 3.6vw, 52px)/1.05 var(--font-title); letter-spacing: -.025em; margin-block-start: 18px; view-transition-name: diag-title; }
  .panel-body { view-transition-name: diag-body; margin-block-start: 20px; }
  .panel-body p { color: var(--gray-light); max-width: 48ch; }
  .panel-scope { margin-block-start: auto; padding-block-start: 40px; }
  .scope { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; margin-block-start: 12px; }
  .scope li { border: 1px solid var(--line-dark); padding: 12px 10px; font-size: 13px; line-height: 1.3; color: var(--gray); transition: border-color .4s var(--ease), color .4s var(--ease); }
  .scope li.on { border-color: var(--teal); color: var(--white); }
  .panel-out { margin-block-start: 28px; padding-block-start: 20px; border-block-start: 1px solid var(--line-dark); display: flex; gap: 12px 20px; align-items: baseline; flex-wrap: wrap; justify-content: space-between; }
  .panel-out > div { display: flex; gap: 12px; align-items: baseline; flex-wrap: wrap; }
  .panel-out strong { font: 500 15px/1.4 var(--font-title); }
  .panel-out span { color: var(--gray); font-size: 14px; }
  .panel-cta { display: inline-flex; align-items: center; gap: 10px; padding-block: 10px; margin-block: -10px; color: var(--teal); font: 500 10.5px/1.6 var(--font-title); letter-spacing: .2em; text-transform: uppercase; }
  /* Sin JavaScript las pestañas no funcionan: se muestra la lista completa
     de diagnósticos (misma fuente que usa el panel interactivo). */
  .js .diag-list, .no-js .diag { display: none; }
  .diag-list { border-block-start: 1px solid var(--black); }
  .diag-list > li { display: grid; gap: 8px; padding-block: 28px; border-block-end: 1px solid var(--gray-light); max-width: 72ch; }
  .diag-list h3 { display: grid; grid-template-columns: 36px 1fr; gap: 12px; font: 500 17px/1.35 var(--font-title); }
  .diag-list h3 .n { font-size: 10.5px; letter-spacing: .2em; color: var(--teal-dark); padding-block-start: 3px; }
  .diag-list .eyebrow { margin-block-start: 8px; }
  .diag-list__title { font: 500 24px/1.2 var(--font-title); letter-spacing: -.015em; }
  .diag-list__out strong { font: 500 15px/1.4 var(--font-title); }
  .diag-list__out span, .diag-list__scope { font-size: 14px; color: var(--ink-soft); }
  .diag-note { margin-block-start: 40px; font-size: 14px; color: var(--ink-soft); max-width: 60ch; }
  @media (max-width: 900px) { .panel { position: static; min-height: 0; } .scope { grid-template-columns: repeat(3, 1fr); } }
  @media (max-width: 560px) { .scope { grid-template-columns: 1fr 1fr; } .symptom { font-size: 16px; padding-block: 18px; } }

  /* ---------- Método ---------- */
  .steps { position: relative; display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px; padding-block-start: 36px; }
  .track { position: absolute; inset: 0 0 auto 0; height: 1px; background: var(--gray-light); }
  .track::after { content: ""; position: absolute; inset: 0; background: var(--teal); transform-origin: 0 50%; }
  .step { position: relative; }
  .step::before { content: ""; position: absolute; inset-block-start: -40px; inset-inline-start: 0; width: 9px; height: 9px; background: var(--teal); }
  .step .n { font: 500 10.5px/1 var(--font-title); letter-spacing: .2em; color: var(--teal-dark); }
  .step h3 { font: 600 18px/1.3 var(--font-title); margin-block: 14px 10px; }
  .step p { font-size: 14px; line-height: 1.65; color: var(--ink-soft); }
  .quote { margin-block-start: clamp(80px, 10vw, 140px); padding-block-start: 32px; border-block-start: 1px solid var(--black); display: grid; grid-template-columns: 1fr 2fr; gap: 32px; }
  .quote p:last-child { font: 300 clamp(26px, 3vw, 42px)/1.2 var(--font-title); letter-spacing: -.015em; }
  @media (max-width: 1080px) {
    .steps { grid-template-columns: 1fr; gap: 36px; padding: 0 0 0 36px; }
    .track { inset: 0 auto 0 4px; width: 1px; height: auto; }
    .track::after { transform-origin: 50% 0; }
    .step::before { inset-block-start: 8px; inset-inline-start: -36px; }
  }
  @media (max-width: 900px) { .quote { grid-template-columns: 1fr; } }

  /* ---------- IA ---------- */
  .ia-intro { position: sticky; top: calc(var(--header) + 48px); }
  .ia-intro .h2 { margin-block: 20px 24px; }
  .ia-intro p { color: var(--gray); max-width: 44ch; }
  .ia-intro .measure { margin-block-start: 32px; padding-block-start: 20px; border-block-start: 1px solid var(--line-dark); color: var(--white); font-size: 15px; }
  .ia-list li { border-block-start: 1px solid var(--line-dark); padding-block: 28px; }
  .ia-list li:last-child { border-block-end: 1px solid var(--line-dark); }
  .ia-list .n { font: 500 10.5px/1 var(--font-title); letter-spacing: .2em; color: var(--teal); }
  .ia-list h3 { font: 300 clamp(32px, 4.6vw, 64px)/1.05 var(--font-title); letter-spacing: -.03em; margin-block-start: 10px; color: rgba(255, 255, 255, .42); transition: color .5s var(--ease); }
  .ia-list .desc { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .6s var(--ease); }
  .ia-list .desc > p { overflow: hidden; color: var(--gray); max-width: 42ch; opacity: 0; transition: opacity .5s var(--ease); }
  .ia-list li.is-active h3 { color: var(--white); }
  .ia-list li.is-active .desc { grid-template-rows: 1fr; }
  .ia-list li.is-active .desc > p { opacity: 1; padding-block-start: 12px; }
  @media (max-width: 900px) { .ia-intro { position: static; } }
  /* Sin JavaScript no hay paso activo: se muestran todas las descripciones. */
  .no-js .ia-list .desc { grid-template-rows: 1fr; }
  .no-js .ia-list .desc > p { opacity: 1; padding-block-start: 12px; }

  /* ---------- Fundadores ---------- */
  .founders-lead { font: 300 clamp(24px, 2.6vw, 36px)/1.25 var(--font-title); letter-spacing: -.015em; max-width: 26ch; }
  .founder { position: relative; border-block-start: 1px solid var(--black); padding-block-start: 32px; }
  .founder::before {
    content: ""; position: absolute; inset: -1px 0 auto 0; height: 2px; background: var(--teal);
    transform: scaleX(0); transform-origin: 0 50%; transition: transform .7s var(--ease);
  }
  .founder:focus-within::before, .founder:has(details[open])::before { transform: none; }
  @media (hover: hover) { .founder:hover::before { transform: none; } }
  .founder h3 { font: 600 clamp(24px, 2.4vw, 32px)/1.15 var(--font-title); letter-spacing: -.015em; }
  .founder .eyebrow { margin-block-start: 8px; }
  .founder .focus { font: 500 19px/1.4 var(--font-title); margin-block-start: 24px; max-width: 32ch; }
  .founder details { margin-block-start: 28px; border-block-start: 1px solid var(--gray-light); }
  .founder summary {
    list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center;
    padding-block: 16px; font: 500 10.5px/1 var(--font-title); letter-spacing: .2em; text-transform: uppercase;
  }
  .founder summary::-webkit-details-marker { display: none; }
  .founder summary .ico { transition: transform .45s var(--ease); }
  .founder details[open] summary .ico { transform: rotate(45deg); }
  .founder details::details-content { block-size: 0; overflow: hidden; transition: block-size .6s var(--ease), content-visibility .6s allow-discrete; }
  .founder details[open]::details-content { block-size: auto; }
  .founder details p { font-size: 15px; color: var(--ink-soft); padding-block-end: 12px; }
  .tags { display: flex; flex-wrap: wrap; gap: 6px; padding-block: 8px 20px; }
  .tags li { border: 1px solid var(--gray-light); padding: 6px 10px; font-size: 12.5px; line-height: 1.2; }

  /* ---------- Contacto ---------- */
  .contact-title { font: 500 clamp(44px, 7vw, 104px)/.98 var(--font-title); letter-spacing: -.04em; margin-block-start: 24px; }
  .mail { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-block-start: 32px; }
  .mail a { font: 500 clamp(20px, 2.2vw, 28px)/1.2 var(--font-title); color: var(--teal-dark); }
  .copy {
    background: none; border: 1px solid var(--gray-light); padding: 9px 12px; cursor: pointer;
    font: 500 10.5px/1 var(--font-title); letter-spacing: .2em; text-transform: uppercase;
    transition: border-color .3s, color .3s;
  }
  .copy.done { border-color: var(--teal); color: var(--teal-dark); }
  @media (hover: hover) { .copy:hover { border-color: var(--black); } }

  .form { display: grid; grid-template-columns: 1fr 1fr; gap: 28px 24px; }
  .field { display: grid; gap: 8px; }
  .field--full { grid-column: 1 / -1; }
  .field label { font: 500 10.5px/1.4 var(--font-title); letter-spacing: .2em; text-transform: uppercase; }
  .field input, .field select, .field textarea {
    width: 100%; border: 0; border-block-end: 1px solid var(--black); border-radius: 0; background: transparent;
    padding: 10px 0 12px; font-size: 17px; line-height: 1.5; appearance: none;
    transition: border-color .3s var(--ease);
  }
  .field select {
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3 6l5 5 5-5' fill='none' stroke='%230D0D0D' stroke-width='1.5' stroke-linecap='square'/%3E%3C/svg%3E") right 2px center / 14px no-repeat;
    padding-inline-end: 28px; cursor: pointer;
  }
  .field textarea { field-sizing: content; min-height: 3lh; max-height: 12lh; resize: vertical; }
  .field input:focus-visible, .field select:focus-visible, .field textarea:focus-visible { outline: none; border-block-end: 2px solid var(--teal); padding-block-end: 11px; }
  .field input:user-invalid, .field textarea:user-invalid { border-block-end-color: var(--black); }
  .field .err { font-size: 13px; color: var(--black); display: none; }
  .field:has(:user-invalid) .err { display: block; }
  .field:has(:user-invalid) label::after { content: " · requerido"; color: var(--teal-dark); }
  .form-foot { grid-column: 1 / -1; display: flex; align-items: center; gap: 16px 28px; flex-wrap: wrap; }
  .form-foot p { font-size: 13px; color: var(--ink-soft); max-width: 38ch; }
  @media (max-width: 560px) { .form { grid-template-columns: 1fr; } }

  /* Sin JavaScript el formulario no puede preparar el correo: se oculta
     y se ofrece el correo directo, para que ningún dato viaje en la URL. */
  .no-js .form, .no-js .copy { display: none; }
  .js .form-fallback { display: none; }

  /* ---------- Pie ---------- */
  .site-footer { background: var(--black); color: var(--gray); padding: 56px 0 36px; font-size: 13px; }
  .foot-top { display: flex; justify-content: space-between; align-items: end; gap: 24px; flex-wrap: wrap; }
  .slogan { font: 500 clamp(22px, 2.4vw, 30px)/1.1 var(--font-title); color: var(--white); letter-spacing: -.01em; }
  .site-footer nav ul { display: flex; flex-wrap: wrap; gap: 8px 28px; }
  .site-footer nav a { color: var(--white); font: 500 10.5px/1 var(--font-title); letter-spacing: .2em; text-transform: uppercase; }
  @media (hover: hover) { .site-footer nav a:hover { color: var(--teal); } }
  .legal { margin-block-start: 40px; padding-block-start: 22px; border-block-start: 1px solid var(--line-dark); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px 24px; }

  @media (max-width: 900px) {
    .nav { display: none; }
    .menu-btn { display: block; }
  }
}

/* ---------- Movimiento ----------
   Todo el contenido es visible sin JavaScript; las animaciones solo se
   aplican con la clase .js y se anulan con prefers-reduced-motion. */
@layer motion {
  @media (prefers-reduced-motion: no-preference) {
    .js [data-reveal] {
      opacity: 0; transform: translateY(28px);
      transition: opacity .9s var(--ease), transform .9s var(--ease);
      transition-delay: var(--d, 0s);
    }
    .js [data-reveal].is-in { opacity: 1; transform: none; }
    [data-reveal="1"] { --d: .1s; }
    [data-reveal="2"] { --d: .2s; }
    [data-reveal="3"] { --d: .5s; }
    [data-reveal="4"] { --d: .62s; }
    [data-reveal="5"] { --d: .8s; }

    /* Titulares que suben línea a línea */
    .js .lines .ln { display: block; overflow: hidden; padding-block-end: .1em; margin-block-end: -.1em; }
    .js .lines .ln > span { display: inline-block; transform: translateY(110%); transition: transform 1.1s var(--ease); transition-delay: calc(var(--i, 0) * .08s + .1s); }
    .js .lines .ln:nth-child(2) > span { --i: 1; }
    .js .lines .ln:nth-child(3) > span { --i: 2; }
    .js .lines.is-in .ln > span { transform: none; }

    .js .hero-rule { transform-origin: 0 50%; transform: scaleX(0); transition: transform 1s .7s var(--ease); }
    .js .hero.is-in .hero-rule { transform: none; }
    .scroll-cue i::after { animation: cue 2.4s var(--ease) infinite; }
    @keyframes cue { 0% { transform: translateX(-100%); } 60%, 100% { transform: translateX(100%); } }

    /* Propósito: palabras que se encienden */
    .js .purpose .w { opacity: .36; transition: opacity .2s linear; }
    .js .purpose-note { opacity: 0; transform: translateY(16px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
    .js .purpose-note.is-in { opacity: 1; transform: none; }

    /* Método: línea que se dibuja y pasos en secuencia */
    .js .track::after { transform: scaleX(0); transition: transform 1.8s var(--ease); }
    .js .steps.is-in .track::after { transform: none; }
    .js .step { opacity: 0; transform: translateY(18px); transition: opacity .8s var(--ease), transform .8s var(--ease); transition-delay: calc(var(--i, 0) * .22s + .2s); }
    .js .step::before { background: var(--black); transition: background-color .3s calc(var(--i, 0) * .3s + .3s); }
    .js .steps.is-in .step { opacity: 1; transform: none; }
    .js .steps.is-in .step::before { background: var(--teal); }
    .step:nth-child(3) { --i: 1; }
    .step:nth-child(4) { --i: 2; }
    .step:nth-child(5) { --i: 3; }
    .step:nth-child(6) { --i: 4; }
    @media (max-width: 1080px) { .js .track::after { transform: scaleY(0); } }

    /* Mejora progresiva: animaciones ligadas al scroll nativas de CSS */
    @supports (animation-timeline: scroll()) {
      .progress { animation: grow linear both; animation-timeline: scroll(root); }
      @keyframes grow { to { transform: scaleX(1); } }
    }
    @supports (animation-timeline: view()) {
      .hero-title { animation: lift linear both; animation-timeline: view(); animation-range: exit 0% exit 90%; }
      @keyframes lift { to { transform: translateY(-10vh); opacity: .15; } }
    }

    /* View Transitions del diagnóstico */
    ::view-transition-old(root), ::view-transition-new(root) { animation: none; }
    ::view-transition-old(diag-title), ::view-transition-old(diag-body) { animation: vt-out .22s var(--ease) both; }
    ::view-transition-new(diag-title) { animation: vt-in .55s var(--ease) both; }
    ::view-transition-new(diag-body) { animation: vt-in .55s .06s var(--ease) both; }
    @keyframes vt-out { to { opacity: 0; transform: translateY(-10px); } }
    @keyframes vt-in { from { opacity: 0; transform: translateY(14px); } }
  }

  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .purpose { height: auto; padding-block: 120px; }
    .purpose-pin { position: static; height: auto; }
    .ia-list h3, .ia-list .desc, .ia-list .desc > p, .symptom, .btn, .btn::before { transition: none; }
  }
}

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

  @media print {
    .site-header, .progress, .skip, .scroll-cue, #menu, .form, .copy { display: none !important; }
    .hero { min-height: 0; padding-block: 24px; }
    .purpose { height: auto; }
    .purpose-pin { position: static; height: auto; padding-block: 48px; }
    .js .purpose .w, .js [data-reveal], .js .step, .js .purpose-note { opacity: 1 !important; transform: none !important; }
    .js .lines .ln > span { transform: none !important; }
    .panel, .ia-intro { position: static; }
    .ia-list .desc { grid-template-rows: 1fr; }
    .ia-list .desc > p { opacity: 1; }
    .section { padding-block: 48px; }
  }
}