/* Exportadora Frontera Sur S.A. — hoja única.
   Sin Google Fonts a propósito: filtra la IP del visitante ANTES del banner.
   Pila del sistema = 0 KB, 0 terceros, 0 CLS por fuente que carga tarde. */
:root{
  --primary:#1A6FD0;        /* medido: 4,97:1 con texto blanco */
  --primary-d:#122F4D;      /* navy del wordmark */
  --primary-l:#3B9BE8;
  --accent:#19ABD0;
  --bg:#FFFFFF; --bg-2:#F4F7FB; --text:#14202E; --muted:#4E6479;
  --line:rgba(18,47,77,.14); --card:#FFFFFF; --shadow:0 1px 2px rgba(18,47,77,.06),0 8px 24px rgba(18,47,77,.06);
  --max:1120px;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
:root:not([data-theme="light"]){ }
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0A1826; --bg-2:#0E2133; --text:#E7EEF6; --muted:#9FB3C8;
    --line:rgba(159,179,200,.20); --card:#0E2133;
    --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px rgba(0,0,0,.35);
  }
}
:root[data-theme="dark"]{
  --bg:#0A1826; --bg-2:#0E2133; --text:#E7EEF6; --muted:#9FB3C8;
  --line:rgba(159,179,200,.20); --card:#0E2133;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px rgba(0,0,0,.35);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){ html{scroll-behavior:auto} *{animation:none!important;transition:none!important} }
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto}           /* height:auto o el height="" del HTML ignora el aspect-ratio */
a{color:var(--primary);text-underline-offset:3px}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:4px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 22px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;z-index:99;background:var(--card);padding:10px 14px;border:1px solid var(--line);border-radius:8px}

header.top{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:18px;min-height:68px;flex-wrap:wrap}
.top img{height:34px;width:auto}
.top nav{margin-left:auto;display:flex;gap:20px;flex-wrap:wrap;align-items:center}
.top nav a{color:var(--muted);text-decoration:none;font-size:.9rem;font-weight:600}
.top nav a:hover{color:var(--text)}
.lang{border:1px solid var(--line);border-radius:999px;padding:5px 12px;font-size:.8rem;font-weight:700;text-decoration:none;color:var(--text)!important}

.hero{padding:74px 0 60px;background:linear-gradient(180deg,var(--bg-2),var(--bg))}
.hero h1{font-size:clamp(2rem,5vw,3.1rem);line-height:1.12;letter-spacing:-.02em;margin:0 0 18px;font-weight:800}
.hero p.lead{font-size:clamp(1.02rem,2.1vw,1.2rem);color:var(--muted);max-width:60ch;margin:0 0 28px}
.eyebrow{display:inline-block;font-size:.76rem;letter-spacing:.14em;text-transform:uppercase;font-weight:800;color:var(--primary);margin:0 0 14px}
.btn{display:inline-block;background:var(--primary);color:#fff;text-decoration:none;font-weight:700;padding:13px 22px;border-radius:10px;border:1px solid transparent}
.btn:hover{background:var(--primary-d)}
.btn.ghost{background:transparent;color:var(--text);border-color:var(--line)}
.btn.ghost:hover{border-color:var(--primary);background:transparent}
.cta-row{display:flex;gap:12px;flex-wrap:wrap}

section{padding:64px 0;border-top:1px solid var(--line)}
h2{font-size:clamp(1.45rem,3vw,2rem);letter-spacing:-.015em;margin:0 0 12px;font-weight:800}
h3{font-size:1.05rem;margin:0 0 8px;font-weight:800}
.sub{color:var(--muted);max-width:62ch;margin:0 0 32px}
.grid{display:grid;gap:18px}
@media(min-width:760px){ .g3{grid-template-columns:repeat(3,1fr)} .g2{grid-template-columns:repeat(2,1fr)} }
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;box-shadow:var(--shadow)}
.card p{color:var(--muted);margin:0}
.step{position:relative;padding-left:0}
.step .n{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--primary);color:#fff;font-weight:800;font-size:.92rem;margin-bottom:12px}
.step .where{display:block;font-size:.76rem;letter-spacing:.1em;text-transform:uppercase;color:var(--primary);font-weight:800;margin-bottom:6px}

.tabla-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px;background:var(--card)}
table{border-collapse:collapse;width:100%;min-width:520px;font-size:.94rem}
th,td{text-align:left;padding:13px 16px;border-bottom:1px solid var(--line)}
th{font-weight:800;background:var(--bg-2);white-space:nowrap}
tr:last-child td{border-bottom:0}
td.req{color:var(--muted)}

.nota{background:var(--bg-2);border:1px solid var(--line);border-left:4px solid var(--primary);border-radius:10px;padding:16px 18px;color:var(--muted);font-size:.93rem}
footer{padding:44px 0;border-top:1px solid var(--line);color:var(--muted);font-size:.88rem;background:var(--bg-2)}
footer .wrap{display:flex;gap:26px;flex-wrap:wrap;justify-content:space-between;align-items:flex-start}
footer a{color:var(--muted)}
.dl{margin:0}
.dl dt{font-weight:800;color:var(--text);font-size:.86rem;margin-top:12px}
.dl dd{margin:2px 0 0;color:var(--muted);font-size:.9rem}