/* C&LN — dirección A "Umbral". Sin fuentes ni recursos externos. */
:root {
  --bg: #F3F6F3;
  --surface: #FFFFFF;
  --text: #17262B;
  --soft: #4A5A5F;
  --line: #C9D3CE;
  --brand: #1FA37A;        /* fondos de botones; el texto sobre él es --on-brand */
  --brand-text: #0F7A58;   /* verde apto para texto/enlaces sobre --bg (4.9:1) */
  --on-brand: #17262B;
  --band: #17262B;
  --on-band: #F3F6F3;
  --band-soft: #A9B8B4;
  --band-link: #3FD1A0;
  --mist: #DCE4DF;
  --todo: #FDE68A;
  --radius: 2px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0F1A1D;
    --surface: #162428;
    --text: #F3F6F3;
    --soft: #A9B8B4;
    --line: #2B3C41;
    --brand: #3FD1A0;
    --brand-text: #3FD1A0;
    --on-brand: #0F1A1D;
    --band: #0A1215;
    --on-band: #F3F6F3;
    --band-soft: #A9B8B4;
    --band-link: #3FD1A0;
    --mist: #1B2C31;
    --todo: #78560A;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.65;
}
img, svg { max-width: 100%; }
a { color: var(--brand-text); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--brand-text); outline-offset: 3px; }
.band :focus-visible, .footer :focus-visible { outline-color: var(--band-link); }
::selection { background: var(--brand); color: var(--on-brand); }

.skip { position: absolute; left: -999px; top: 0; background: var(--text); color: var(--bg); padding: .75rem 1rem; z-index: 100; }
.skip:focus { left: 0; }

.wrap { width: min(1120px, 100% - 2.5rem); margin-inline: auto; }
.narrow { width: min(760px, 100% - 2.5rem); margin-inline: auto; }

/* Banner de borrador (solo en builds de revisión) */
.draft { background: #B45309; color: #fff; text-align: center; font: 600 .8125rem/1 var(--mono); letter-spacing: .04em; padding: .6rem 1rem; }
mark.todo { background: var(--todo); color: inherit; padding: 0 .25em; }

/* Encabezado */
.header { border-bottom: 1px solid var(--line); background: var(--bg); }
.header .wrap { display: flex; align-items: center; gap: 1.5rem; min-height: 4.5rem; }
.logo { display: inline-flex; color: var(--text); text-decoration: none; flex: none; }
.logo svg { height: 2.1rem; width: auto; display: block; }
.nav { margin-left: auto; display: flex; align-items: center; gap: 1.4rem; }
.nav ul { display: flex; gap: 1.3rem; list-style: none; margin: 0; padding: 0; }
.nav a { color: var(--text); text-decoration: none; font-size: .9375rem; font-weight: 500; padding: .35rem 0; border-bottom: 2px solid transparent; }
.nav a:hover, .nav a[aria-current="page"] { border-bottom-color: var(--brand); }
.lang { font: 600 .8125rem var(--mono); text-decoration: none; color: var(--soft); border: 1px solid var(--line); padding: .3rem .55rem; border-radius: var(--radius); }
.lang:hover { color: var(--text); border-color: var(--text); }
.menu { display: none; margin-left: auto; }
.menu summary { list-style: none; cursor: pointer; font-weight: 600; font-size: .9375rem; padding: .5rem .8rem; border: 1px solid var(--line); border-radius: var(--radius); }
.menu summary::-webkit-details-marker { display: none; }
.menu[open] summary { border-color: var(--text); }
.menu .panel { position: absolute; left: 0; right: 0; top: 100%; background: var(--bg); border-bottom: 1px solid var(--line); padding: .5rem 1.25rem 1.25rem; z-index: 50; }
.menu .panel a { display: block; padding: .8rem 0; color: var(--text); text-decoration: none; border-bottom: 1px solid var(--line); font-weight: 500; }
.menu .panel .lang { display: inline-block; margin-top: 1rem; border-bottom: 1px solid var(--line); }
.header { position: relative; }

/* Botones */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .55rem; font: 650 1rem/1 var(--font); padding: 1rem 1.5rem; border-radius: var(--radius); text-decoration: none; border: 2px solid transparent; cursor: pointer; }
.btn-primary { background: var(--brand); color: var(--on-brand); }
.btn-primary:hover { filter: brightness(1.06); text-decoration: none; }
.btn-ghost { border-color: var(--text); color: var(--text); }
.btn-ghost:hover { background: var(--text); color: var(--bg); text-decoration: none; }
.btn-sm { padding: .7rem 1.1rem; font-size: .9375rem; }
.band .btn-ghost { border-color: var(--on-band); color: var(--on-band); }
.band .btn-ghost:hover { background: var(--on-band); color: var(--band); }
.btn svg { width: 1.15em; height: 1.15em; flex: none; }

/* Títulos */
h1, h2, h3 { line-height: 1.12; letter-spacing: -.025em; margin: 0; text-wrap: balance; }
h1 { font-size: clamp(2.25rem, 5.4vw, 3.9rem); font-weight: 720; }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.2rem); font-weight: 700; }
h3 { font-size: 1.2rem; font-weight: 650; letter-spacing: -.01em; line-height: 1.3; }
p { margin: 0; }
.eyebrow { display: flex; align-items: center; gap: .65rem; font: 600 .78rem/1.3 var(--mono); letter-spacing: .09em; text-transform: uppercase; color: var(--brand-text); }
.eyebrow::before { content: ""; width: .7rem; height: .7rem; background: var(--brand); flex: none; }
.lead { font-size: clamp(1.1rem, 1.6vw, 1.3rem); color: var(--soft); max-width: 60ch; line-height: 1.55; }

section { padding-block: clamp(3rem, 7vw, 5.5rem); }
section.tight { padding-top: clamp(1rem, 3vw, 2rem); }
section.flush { padding-bottom: 0; }
.sec-head { display: grid; gap: .8rem; margin-bottom: 2.25rem; max-width: 62ch; }

/* Héroe */
.hero { position: relative; overflow: hidden; padding-block: clamp(3rem, 8vw, 6.5rem) clamp(3rem, 7vw, 5rem); }
.hero .wrap { position: relative; display: grid; gap: 1.6rem; }
.hero h1 { max-width: 17ch; }
.hero .actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: .6rem; }
.hero .note { font-size: .9375rem; color: var(--soft); }
.hero-mark { position: absolute; right: -4%; top: 50%; transform: translateY(-50%); width: min(46vw, 520px); color: var(--mist); pointer-events: none; z-index: 0; }
.hero-mark svg { width: 100%; height: auto; display: block; }
.hero-mark .acc { fill: var(--brand); opacity: .55; }
.hero .wrap > * { position: relative; z-index: 1; }

/* Selector de segmentos */
.chooser { list-style: none; margin: 0; padding: 0; border-top: 2px solid var(--text); }
.chooser a { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.4fr) auto; gap: 1.5rem; align-items: center; padding: 1.5rem .25rem; border-bottom: 1px solid var(--line); color: var(--text); text-decoration: none; }
.chooser .who { font-size: 1.3rem; font-weight: 660; letter-spacing: -.015em; line-height: 1.25; }
.chooser .line { color: var(--soft); font-size: 1rem; line-height: 1.5; }
.chooser .go { width: 2.6rem; height: 2.6rem; display: grid; place-items: center; border: 1.5px solid var(--text); transition: transform .15s ease, background .15s ease; }
.chooser .go svg { width: 1.1rem; height: 1.1rem; }
.chooser a:hover { background: var(--surface); }
.chooser a:hover .go { background: var(--brand); border-color: var(--brand); color: var(--on-brand); transform: translateX(4px); }

/* Pasos (sí es una secuencia) */
.steps { list-style: none; counter-reset: s; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 2px solid var(--text); }
.steps li { counter-increment: s; padding: 1.4rem 1.4rem 0 0; display: grid; gap: .6rem; align-content: start; }
.steps li::before { content: counter(s); font: 600 .95rem var(--mono); color: var(--brand-text); }
.steps h3 { font-size: 1.1rem; }
.steps p { color: var(--soft); font-size: .98rem; line-height: 1.55; }

/* Qué esperar */
.expect { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2.25rem; }
.expect > div { display: grid; gap: .7rem; align-content: start; }
.expect > div::before { content: ""; width: 1.6rem; height: .5rem; background: var(--brand); }
.expect p { color: var(--soft); }

/* Preguntas */
.faq { border-top: 2px solid var(--text); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { list-style: none; cursor: pointer; padding: 1.25rem 3rem 1.25rem .25rem; font-weight: 640; font-size: 1.1rem; line-height: 1.4; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: .5rem; top: 1rem; font: 400 1.6rem/1 var(--font); color: var(--brand-text); }
.faq details[open] summary::after { content: "–"; }
.faq .ans { padding: 0 3rem 1.4rem .25rem; color: var(--soft); max-width: 68ch; }
.more { margin-top: 1.5rem; }

/* Banda (CTA final y pie) */
.band { background: var(--band); color: var(--on-band); }
.band .lead { color: var(--band-soft); }
.band .cta { display: grid; gap: 1.2rem; max-width: 60ch; }
.band .actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: .4rem; }
.band .free { font-size: .9375rem; color: var(--band-soft); }

/* Páginas interiores */
.page-head { padding-block: clamp(2.5rem, 6vw, 4.5rem) 2rem; display: grid; gap: 1.2rem; }
.crumbs { font: 500 .8125rem var(--mono); color: var(--soft); }
.crumbs a { color: var(--soft); }
.who-list { list-style: none; margin: 0; padding: 0; display: grid; gap: .7rem; max-width: 62ch; }
.who-list li { position: relative; padding-left: 1.6rem; }
.who-list li::before { content: ""; position: absolute; left: 0; top: .6em; width: .6rem; height: .6rem; background: var(--brand); }
.small-note { font-weight: 600; max-width: 60ch; margin-bottom: 2.5rem; }
.items { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 2.5rem; border-top: 2px solid var(--text); }
.items h3 a { color: inherit; text-decoration-color: var(--brand); text-decoration-thickness: 2px; }
.items h3 a:hover { color: var(--brand-text); }
.fact { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2.2fr); gap: 2.5rem; padding: 2rem 0 2.2rem; border-top: 1px solid var(--line); }
.fact:first-child { border-top: 2px solid var(--text); }
.fact h2 { font-size: 1.4rem; }
.fact-body p { margin-bottom: .9rem; max-width: 62ch; }
.fact-body .who-list { max-width: 62ch; }
.auth { padding-bottom: 1.2rem; }
.auth h3 { margin-bottom: .25rem; }
.auth p { color: var(--soft); max-width: 62ch; }
.soft-note { color: var(--soft); font-size: .95rem; margin-top: .4rem; }
.related { margin-top: 2.2rem; }
.related ul { list-style: none; padding: 0; margin: .6rem 0 0; display: flex; flex-wrap: wrap; gap: .5rem 1.6rem; }
.items.single { grid-template-columns: 1fr; max-width: 68ch; }
.sec-head p:not(.lead) { color: var(--soft); }
.items > div { padding: 1.3rem 0 1.4rem; border-bottom: 1px solid var(--line); display: grid; gap: .4rem; align-content: start; }
.items p { color: var(--soft); font-size: .98rem; line-height: 1.55; }
.note-box { margin-top: 2rem; padding: 1.1rem 1.3rem; background: var(--surface); border: 1px solid var(--line); max-width: 68ch; font-size: .98rem; }
.cols { display: grid; grid-template-columns: repeat(2, 1fr); gap: 3rem; }
.checks, .crosses { list-style: none; margin: 1rem 0 0; padding: 0; display: grid; gap: .8rem; }
.checks li, .crosses li { position: relative; padding-left: 1.7rem; }
.checks li::before { content: ""; position: absolute; left: 0; top: .55em; width: .6rem; height: .6rem; background: var(--brand); }
.crosses li::before { content: ""; position: absolute; left: 0; top: .7em; width: .7rem; height: 2px; background: var(--soft); }
.contact-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 1.2rem; border-top: 2px solid var(--text); }
.contact-list li { display: grid; grid-template-columns: 9rem 1fr; gap: 1rem; padding: 1.1rem 0; border-bottom: 1px solid var(--line); align-items: baseline; }
.contact-list .k { font: 600 .8rem var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--soft); }
.states { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 2rem; border-top: 2px solid var(--text); }
.states li { padding: 1rem 0; border-bottom: 1px solid var(--line); font-weight: 600; }

/* Texto legal */
.prose { max-width: 68ch; }
.prose h2 { font-size: 1.5rem; margin-top: 2.6rem; }
.prose h3 { margin-top: 2rem; margin-bottom: .6rem; }
.prose p, .prose ul, .prose ol { margin-block: .9rem; }
.prose ul, .prose ol { padding-left: 1.3rem; }
.prose li { margin-block: .35rem; }

/* Pie */
.footer { background: var(--band); color: var(--on-band); padding-block: 3.5rem 2.5rem; }
.footer a { color: var(--on-band); text-decoration: none; }
.footer a:hover { color: var(--band-link); text-decoration: underline; }
.footer .grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 2.5rem; }
.footer .logo { color: var(--on-band); }
.footer h2 { font: 600 .78rem var(--mono); letter-spacing: .09em; text-transform: uppercase; color: var(--band-soft); margin-bottom: 1rem; }
.footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .6rem; font-size: .975rem; }
.footer .tag { color: var(--band-soft); margin-top: 1rem; max-width: 30ch; font-size: .975rem; }
.footer .fine { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid #2B3C41; color: var(--band-soft); font-size: .875rem; display: grid; gap: .4rem; }

/* Barra fija de WhatsApp en móvil */
.wa-float { display: none; }

@media (max-width: 900px) {
  .nav { display: none; }
  .menu { display: block; }
  .chooser a { grid-template-columns: 1fr auto; }
  .chooser .line { grid-column: 1 / 2; }
  .chooser .go { grid-row: 1 / 3; grid-column: 2; }
  .steps { grid-template-columns: repeat(2, 1fr); row-gap: 1.6rem; }
  .expect { grid-template-columns: 1fr; gap: 1.6rem; }
  .items, .cols { grid-template-columns: 1fr; }
  .fact { grid-template-columns: 1fr; gap: 1rem; }
  .states { grid-template-columns: repeat(2, 1fr); }
  .footer .grid { grid-template-columns: 1fr 1fr; }
  .hero-mark { display: none; }
}
@media (max-width: 640px) {
  body { font-size: 1rem; padding-bottom: 4.2rem; }
  .steps { grid-template-columns: 1fr; }
  .footer .grid { grid-template-columns: 1fr; }
  .contact-list li { grid-template-columns: 1fr; gap: .3rem; }
  .hero .actions .btn, .band .actions .btn { width: 100%; }
  .wa-float { display: flex; position: fixed; left: 0; right: 0; bottom: 0; z-index: 60; background: var(--brand); color: var(--on-brand); justify-content: center; align-items: center; gap: .6rem; padding: 1rem; font-weight: 700; text-decoration: none; border-top: 1px solid rgba(0,0,0,.15); }
  .wa-float svg { width: 1.2em; height: 1.2em; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}
@media print {
  .header, .footer, .wa-float, .draft, .hero-mark { display: none; }
  body { background: #fff; color: #000; }
}