/* ─────────────────────────────────────────────────────────
   Tranto — landing
   Mundo visual: señalética de transporte + documento oficial.
   Display: Archivo · Texto: Public Sans · autoalojadas, subset latino.
   Sin librerías, sin imágenes, sin peticiones a terceros.
   ───────────────────────────────────────────────────────── */

@font-face{
  font-family:"Archivo";
  src:url("fonts/archivo-var-latin.woff2") format("woff2");
  font-weight:500 700;font-stretch:100% 118%;font-style:normal;font-display:swap;
}
@font-face{
  font-family:"Public Sans";
  src:url("fonts/publicsans-var-latin.woff2") format("woff2");
  font-weight:400 600;font-style:normal;font-display:swap;
}

:root{
  --bg:#f9f9f7;
  --surface:#fcfcfb;
  --ink:#0c0d10;
  --ink-2:#4c4e53;      /* 8.0:1 sobre --bg */
  --ink-3:#6b6c70;      /* 5.2:1 sobre --bg */
  --accent:#2a78d6;
  --accent-dk:#1c5cab;
  --accent-wash:#eaf1fb;
  --amber:#96610a;      /* el vacío: aviso, no decoración */
  --line:#e0dfda;
  --line-strong:#c9c8c2;
  --line-soft:#edece8;

  --display:"Archivo","Helvetica Neue",Helvetica,Arial,sans-serif;
  --text:"Public Sans",system-ui,-apple-system,"Segoe UI",Helvetica,Arial,sans-serif;

  --wrap:1140px;
  --pad:clamp(20px,5vw,44px);
  --sec:clamp(66px,8.5vw,116px);
  --gap-h:clamp(30px,4vw,46px);   /* titular de sección → contenido */

  --ease-out:cubic-bezier(.23,1,.32,1);
  --z-head:100;

  accent-color:var(--accent);caret-color:var(--accent);
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--text);font-size:17px;line-height:1.6;font-weight:400;
  -webkit-font-smoothing:antialiased;
  scrollbar-color:var(--line-strong) var(--bg);
}
p,figure,ul,ol{margin:0;padding:0}
li{list-style:none}
a{color:inherit}
i{font-style:italic}
strong{font-weight:600;color:var(--ink)}
em{font-style:normal;color:var(--accent)}
::selection{background:var(--accent-wash);color:var(--ink)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}

h1,h2,h3{
  margin:0;font-family:var(--display);font-weight:700;
  font-stretch:112%;letter-spacing:-.032em;line-height:1.06;text-wrap:balance;
}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding-inline:var(--pad)}

/* Ritmo de sección: el titular manda el espaciado, sin colisiones de cascada */
.sec-h{font-size:clamp(27px,3.5vw,41px);letter-spacing:-.036em;max-width:20ch}
.sec-h + *{margin-top:var(--gap-h)}
.sec-h + .sec-sub{margin-top:14px}
.sec-sub{font-size:16.5px;color:var(--ink-2);max-width:52ch}
.sec-sub + *{margin-top:var(--gap-h)}
.src{display:block;font-size:12px;line-height:1.45;color:var(--ink-3);margin-top:8px}

/* ── Wordmark ── */
.wordmark{
  font-family:var(--display);font-weight:700;font-stretch:105%;
  font-size:21px;letter-spacing:-.045em;text-decoration:none;
  display:inline-flex;align-items:baseline;gap:.16em;color:var(--ink);
}
/* Contenedor de 20 pies en alzado lateral, a proporción real:
   ISO 668, 6058 x 2591 mm = 2,338:1. En em, para que escale con el cuerpo. */
.wordmark .teu{width:0.608em;height:.26em;background:var(--accent);border-radius:.03em;display:inline-block}
.wordmark--sm{font-size:18px}

/* ── Cabecera ── */
#top-sentinel{position:absolute;top:0;height:1px;width:1px}
.site-head{
  position:sticky;top:0;z-index:var(--z-head);
  background:color-mix(in srgb,var(--bg) 86%,transparent);
  backdrop-filter:saturate(150%) blur(10px);
  border-bottom:1px solid transparent;transition:border-color .25s linear;
}
.site-head.is-stuck{border-bottom-color:var(--line)}
.head-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:62px}
.head-cta{
  font-size:14px;color:var(--ink-2);text-decoration:none;
  border-bottom:1px solid var(--line-strong);padding-bottom:1px;
  transition:color .18s var(--ease-out),border-color .18s var(--ease-out);
}

/* ── Hero ── */
.hero{padding-top:clamp(46px,6.5vw,84px);padding-bottom:var(--sec)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:clamp(34px,5vw,72px);align-items:center}
h1{font-size:clamp(43px,6.2vw,74px);letter-spacing:-.042em;line-height:.99}
.hero .lede{font-size:clamp(18px,2.1vw,23px);color:var(--ink-2);line-height:1.35;margin-top:26px;max-width:26ch;text-wrap:balance}

.cta-row{display:flex;flex-wrap:wrap;align-items:center;gap:14px 26px;margin-top:34px}
.btn{
  display:inline-block;background:var(--accent);color:#fff;text-decoration:none;
  font-weight:600;font-size:16px;letter-spacing:-.008em;padding:13px 24px;border-radius:5px;
  transition:background .18s var(--ease-out),transform .12s var(--ease-out);
}
.btn:active{transform:scale(.97)}
.btn--lg{font-size:17.5px;padding:16px 30px}
.link-arrow{
  display:inline-flex;align-items:center;gap:7px;font-size:15.5px;color:var(--ink-2);
  text-decoration:none;border-bottom:1px solid var(--line-strong);padding-bottom:2px;
  transition:color .18s var(--ease-out),border-color .18s var(--ease-out);
}
.link-arrow svg{transition:transform .22s var(--ease-out)}

/* ── Tarjeta-diagrama ── */
.hero-card{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:clamp(20px,2.6vw,28px)}
.card-title{font-size:14px;font-weight:600;color:var(--ink-2);margin-bottom:20px}
.diagram{width:100%;height:auto;display:block;overflow:visible}
.dg-line{stroke:var(--ink);stroke-width:1.4}
.dg-good{stroke:var(--accent);stroke-width:1.6}
.dg-empty{stroke:var(--amber);stroke-width:1.4;stroke-dasharray:3 4}
.dg-node{fill:var(--ink)}
.dg-node--depot{fill:var(--amber)}
.dg-node--ghost{fill:var(--surface);stroke:var(--line-strong);stroke-width:1.2}
.dg-cross{stroke:var(--line-strong);stroke-width:1.2}
.dg-lab--off{fill:var(--ink-3);text-decoration:line-through}
.dg-tag{font-family:var(--text);font-size:10px;font-weight:600;fill:var(--ink-3)}
.dg-tag--good{fill:var(--accent)}
.dg-lab{font-family:var(--text);font-size:10.5px;fill:var(--ink-2);text-anchor:middle}
.dg-lab--end{text-anchor:end}
.dg-note{font-family:var(--text);font-size:10px;fill:var(--amber);text-anchor:middle}
.dg-note--good{fill:var(--accent)}
.card-foot{font-size:13.5px;line-height:1.5;color:var(--ink-2);margin-top:22px;border-top:1px solid var(--line-soft);padding-top:16px}

/* ── Bandas ── */
.band{padding-block:var(--sec);border-top:1px solid var(--line-soft)}
.band--surface{background:var(--surface)}

/* ── Evidencia: cifras y barras, sin tarjetas ── */
.ev{
  display:grid;grid-template-columns:minmax(240px,4fr) minmax(0,7fr);
  column-gap:clamp(30px,4.5vw,64px);border-top:1px solid var(--line-strong);
}
.ev > figure{padding:26px 0;border-bottom:1px solid var(--line)}
.ev > figure:nth-child(1){grid-area:1/1}
.ev > figure:nth-child(2){grid-area:1/2}
.ev > figure:nth-child(3){grid-area:2/1/3/3}
.ev > figure:nth-child(4){grid-area:3/1/4/3}

.stat{display:flex;align-items:baseline;gap:8px;font-family:var(--display);font-weight:700;font-stretch:108%}
.stat-n{font-size:clamp(44px,6vw,72px);letter-spacing:-.048em;line-height:.92;font-variant-numeric:tabular-nums}
.stat-u{font-size:clamp(15px,1.5vw,19px);font-weight:600;font-stretch:100%;color:var(--ink-3);letter-spacing:-.01em}
.stat-alt{margin-top:10px;font-size:15px;color:var(--ink-3);font-variant-numeric:tabular-nums}
.ev-stat figcaption{margin-top:14px;font-size:15.5px;color:var(--ink-2);line-height:1.45;max-width:34ch}

/* Bloques a lo ancho: cifra a la izquierda, lectura a la derecha */
.ev-merge,.ev-total{
  display:grid;grid-template-columns:minmax(240px,4fr) minmax(0,7fr);
  column-gap:clamp(30px,4.5vw,64px);align-items:baseline;
}
.ev-merge .stat-n{font-size:clamp(30px,3.4vw,42px)}
.ev-body p{font-size:16px;color:var(--ink-2);line-height:1.5;max-width:56ch}
.ev-body .src{font-size:12px;line-height:1.45;color:var(--ink-3);margin-top:10px;max-width:64ch}

/* El remate: el vacío convertido en dinero del lector */
.ev-total{border-top:2px solid var(--ink);padding-top:30px}
.ev-total .stat{flex-wrap:wrap;gap:4px 8px}
.ev-total .stat-n{font-size:clamp(31px,3.7vw,46px);color:var(--amber)}
.ev-total .stat-u{font-size:clamp(13px,1.2vw,15px)}
.ev-total .ev-body p{color:var(--ink);font-size:17px}
.ev-total .ev-body .src{font-size:12px;color:var(--ink-3)}

.ev-foot{margin-top:24px;font-size:14.5px;color:var(--ink-2)}
.ev-sources{margin-top:14px;font-size:12.5px;line-height:1.5;color:var(--ink-3);max-width:74ch}

.ch-title{font-size:14px;font-weight:600;color:var(--ink-2)}
.ch{margin-top:20px;display:flex;flex-direction:column;gap:22px}
.ch-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(120px,1.5fr) auto;align-items:center;gap:clamp(12px,2vw,22px)}
.ch-lab{font-size:14.5px;color:var(--ink-2);line-height:1.35}
.lab-note{display:inline-block;color:var(--ink-3);font-size:13px}
.ch-track{position:relative;height:13px;background:var(--line-soft);border-radius:3px}
.ch-fill{position:absolute;top:0;bottom:0;left:0;border-radius:0 4px 4px 0}
.ch-fill--base{background:var(--ink-3)}
.ch-fill--warn{background:var(--amber);border-radius:0}
.ch-fill--range{
  background:repeating-linear-gradient(135deg,var(--amber) 0 2px,transparent 2px 5px);
  border-radius:0 4px 4px 0;
}
.ch-fill--good{background:var(--accent)}
.ch-mark{position:absolute;top:-7px;bottom:-7px;width:2px;background:var(--ink-2);border-radius:1px}
.ch-mark span{
  position:absolute;top:calc(100% + 5px);left:50%;transform:translateX(-50%);
  font-size:11.5px;color:var(--ink-3);white-space:nowrap;
}
.ch-val{
  min-width:104px;
  font-family:var(--display);font-weight:700;font-stretch:106%;font-size:23px;
  letter-spacing:-.03em;font-variant-numeric:tabular-nums;text-align:right;white-space:nowrap;
}
.ch-val--warn{color:var(--amber)}
.ch-val .u{font-size:.52em;font-weight:600;color:var(--ink-3);margin-left:3px;font-stretch:100%}

/* ── Las cuatro fugas ── */
.legend{display:flex;flex-wrap:wrap;gap:8px 26px;font-size:13.5px;color:var(--ink-3)}
.lg{display:inline-flex;align-items:center;gap:9px}
.lg svg line{stroke-width:1.6;fill:none}
.lg--warn svg line{stroke:var(--amber);stroke-dasharray:3 4}
.lg--good svg line{stroke:var(--accent)}
.sec-sub + .legend{margin-top:16px}
.legend + *{margin-top:var(--gap-h)}
.leaks{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(20px,2.8vw,38px)}
.leaks li{border-top:1px solid var(--line-strong);padding-top:20px}
.leak-dg{display:block;width:100%;max-width:172px;height:auto;margin-bottom:18px}
.c-line{stroke:var(--ink);stroke-width:1.5;fill:none}
.c-empty{stroke:var(--amber);stroke-width:1.5;stroke-dasharray:3 4;fill:none}
.c-good{stroke:var(--accent);stroke-width:1.5;fill:none}
.c-ties line{stroke:var(--accent);stroke-width:1.2}
.c-node{fill:var(--ink)}
.c-node--warn{fill:var(--amber)}
.c-node--good{fill:var(--accent)}
.c-num{font-family:var(--text);font-size:9px;font-weight:600;fill:var(--ink-3);text-anchor:middle}
.c-num--warn{fill:var(--amber)}
.c-num--good{fill:var(--accent)}
.leaks h3{font-size:17.5px;font-stretch:106%;letter-spacing:-.026em}
.leaks p{margin-top:8px;font-size:14.5px;color:var(--ink-2);line-height:1.5}

.offer-cta{margin-top:clamp(34px,4vw,48px);display:flex;flex-wrap:wrap;align-items:center;gap:14px 24px}
.micro{font-size:14.5px;color:var(--ink-3)}

/* ── Pasos (secuencia real: la numeración informa) ── */
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(24px,3.2vw,44px)}
.steps li{border-top:1px solid var(--line-strong);padding-top:22px}
.steps h3{font-size:20px;font-stretch:106%;letter-spacing:-.028em;display:flex;align-items:baseline;gap:12px}
.step-n{font-family:var(--display);font-size:14px;font-weight:600;font-stretch:100%;color:var(--accent);flex:0 0 auto;font-variant-numeric:tabular-nums}
.steps p{margin-top:10px;font-size:15.5px;color:var(--ink-2)}

/* ── Para quién ── */
.who-lede{font-family:var(--display);font-weight:600;font-stretch:106%;font-size:clamp(20px,2.5vw,28px);line-height:1.25;letter-spacing:-.03em;max-width:26ch;text-wrap:balance}
.ports{display:flex;flex-wrap:wrap;gap:10px 0;font-family:var(--display);font-weight:600;font-stretch:106%;font-size:clamp(17px,2vw,22px);letter-spacing:-.028em;color:var(--ink)}
.ports li{position:relative;padding-left:22px}
.ports li:first-child{padding-left:0}
.ports li:not(:first-child)::before{
  content:"";position:absolute;left:8px;top:50%;transform:translateY(-50%);
  width:4px;height:4px;border-radius:50%;background:var(--line-strong);
}
.who-lede + .ports{margin-top:24px}
.ports + .who-txt{margin-top:26px}
.who-txt{font-size:16px;color:var(--ink-2);max-width:56ch;line-height:1.55}

/* ── FAQ ── */
.faq{max-width:760px}
.faq details{border-top:1px solid var(--line)}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{
  list-style:none;cursor:pointer;padding:19px 44px 19px 0;position:relative;
  font-family:var(--display);font-weight:600;font-stretch:104%;
  font-size:18px;letter-spacing:-.026em;transition:color .18s var(--ease-out);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"";position:absolute;right:8px;top:50%;width:11px;height:11px;
  background:
    linear-gradient(var(--ink-2),var(--ink-2)) center/11px 1.5px no-repeat,
    linear-gradient(var(--ink-2),var(--ink-2)) center/1.5px 11px no-repeat;
  transform:translateY(-50%);transition:transform .24s var(--ease-out),background .24s var(--ease-out);
}
.faq details[open] summary::after{
  background:linear-gradient(var(--accent),var(--accent)) center/11px 1.5px no-repeat;
  transform:translateY(-50%) rotate(90deg);
}
.ans{padding:0 0 22px;max-width:56ch}
.ans p{font-size:16px;color:var(--ink-2)}
@supports (interpolate-size:allow-keywords){
  :root{interpolate-size:allow-keywords}
  .faq details::details-content{
    block-size:0;overflow:clip;opacity:0;
    transition:block-size .32s var(--ease-out),opacity .24s var(--ease-out),content-visibility .32s allow-discrete;
  }
  .faq details[open]::details-content{block-size:auto;opacity:1}
}

/* ── Cierre ── */
.close{padding-block:clamp(76px,9vw,128px);border-top:1px solid var(--line-soft);background:var(--surface)}
.close-inner h2{font-size:clamp(28px,4.2vw,46px);letter-spacing:-.038em;max-width:16ch}
.close-inner .btn{margin-top:32px}
.close-inner .micro{margin-top:18px}

/* ── Footer ── */
.site-foot{border-top:1px solid var(--line);padding-block:30px;background:var(--bg)}
.foot-inner{display:flex;flex-wrap:wrap;gap:14px 32px;align-items:center;justify-content:space-between}
.foot-mid{font-size:13.5px;color:var(--ink-3);max-width:46ch}
.foot-end{font-size:13.5px;color:var(--ink-3)}
.foot-end a{color:var(--ink-2);text-decoration:none;border-bottom:1px solid var(--line-strong)}

/* ── Hover sólo en punteros finos ── */
@media (hover:hover) and (pointer:fine){
  .btn:hover{background:var(--accent-dk)}
  .head-cta:hover,.link-arrow:hover,.foot-end a:hover{color:var(--accent);border-color:var(--accent)}
  .link-arrow:hover svg{transform:translateX(3px)}
  .faq summary:hover{color:var(--accent)}
  .wordmark:hover .teu{background:var(--accent-dk)}
}

/* ── Un único momento de motion: la entrada del hero ── */
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:no-preference){
  .hero h1,.hero .lede,.hero .cta-row,.hero-card{animation:rise .72s var(--ease-out) both}
  .hero .lede{animation-delay:.07s}
  .hero .cta-row{animation-delay:.14s}
  .hero-card{animation-delay:.1s}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.12s!important}
}

section[id]{scroll-margin-top:78px}

/* ── Responsive ── */
@media (max-width:1000px){
  .hero-grid{grid-template-columns:1fr;gap:42px;align-items:start}
  .hero-card{max-width:580px}
  .leaks{grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(24px,4vw,36px)}
  .ev{grid-template-columns:1fr;column-gap:0}
  .ev > figure:nth-child(1),
  .ev > figure:nth-child(2),
  .ev > figure:nth-child(3),
  .ev > figure:nth-child(4){grid-area:auto}
  .ev-merge,.ev-total{grid-template-columns:1fr;column-gap:0}
  .ev-body{margin-top:14px}
  .steps{grid-template-columns:1fr;gap:0}
  .steps li{padding:22px 0}
  .steps li:last-child{border-bottom:1px solid var(--line-strong)}
}
@media (max-width:640px){
  body{font-size:16px}
  h1{letter-spacing:-.038em}
  .btn{width:100%;text-align:center}
  .cta-row{gap:18px}
  .leaks{grid-template-columns:1fr}
  .leak-dg{max-width:132px}
  .ch-row{grid-template-columns:1fr auto;row-gap:10px}
  .ch-lab{grid-column:1;font-size:14px;padding-right:10px}
  .lab-note{font-size:12.5px}
  .ch-val{grid-column:2;grid-row:1}
  .ch-track{grid-column:1/-1}
  .ch{gap:26px}
  .foot-inner{flex-direction:column;align-items:flex-start;gap:14px}
}