/* AgroFuel Group — sistema visual BLANCO Y NEGRO.
   Monocromo editorial-industrial: contraste alto, Montserrat, jerarquía por peso y escala. */
:root{
  --ink:#0b0c0d; --ink-2:#17191c; --paper:#ffffff; --bg:#ffffff; --bg-2:#f3f3f3;
  --mut:#5f6367; --line:#e4e4e6; --line-2:#d2d2d5;
  --wrap:1200px; --r:14px; --shadow:0 20px 50px -26px rgba(0,0,0,.5);
  --font:'Montserrat',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);
  font-size:16.5px;line-height:1.6;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{margin:0;line-height:1.08;letter-spacing:-.02em;font-weight:800}
p{margin:0}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.eyebrow{font-size:12.5px;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:var(--mut)}
.muted{color:var(--mut)}
.btn{display:inline-flex;align-items:center;gap:.5em;font-weight:700;font-size:15px;
  padding:14px 24px;border-radius:999px;cursor:pointer;border:1.5px solid var(--ink);transition:.18s}
.btn-gold{background:var(--ink);color:#fff}
.btn-gold:hover{background:#000;transform:translateY(-1px)}
.btn-green{background:var(--ink);color:#fff}
.btn-green:hover{background:#000}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.5);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-outline{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn-outline:hover{background:var(--ink);color:#fff}

/* Nav */
nav.top{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.02em;font-size:19px}
.brand svg{width:38px;height:38px;flex:0 0 auto}
.brand small{display:block;font-size:10px;font-weight:700;letter-spacing:.16em;color:var(--mut);margin-top:1px}
.nav-links{display:flex;align-items:center;gap:28px;font-weight:600;font-size:14.5px}
.nav-links a.lnk{color:var(--mut)}
.nav-links a.lnk:hover{color:var(--ink)}
.nav-tog{display:none;background:none;border:0;cursor:pointer}

/* Hero */
.hero{position:relative;color:#fff;overflow:hidden;background:var(--ink);
  background-image:linear-gradient(180deg,#0b0c0d 0%,#17191c 100%)}
.hero::after{content:"";position:absolute;inset:0;opacity:.10;pointer-events:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60'%3E%3Cpath d='M0 59h60M0 29h60M29 0v60' stroke='%23ffffff' stroke-width='.5' fill='none'/%3E%3C/svg%3E")}
.hero-in{position:relative;z-index:2;padding:96px 0 108px;max-width:820px}
.hero h1{font-size:clamp(38px,6vw,68px);font-weight:900;margin:18px 0}
.hero p.lead{font-size:clamp(17px,2vw,20px);color:#c9cbce;max-width:60ch}
.hero .cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}
.hero .eyebrow{color:#fff}
.hero-stats{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:40px;
  padding:26px 0 40px;border-top:1px solid rgba(255,255,255,.16)}
.hero-stats .s b{display:block;font-size:30px;font-weight:900;color:#fff}
.hero-stats .s span{font-size:13px;color:#9a9da2}

/* Sections */
section{padding:88px 0}
.sec-head{max-width:720px;margin-bottom:44px}
.sec-head h2{font-size:clamp(28px,4vw,44px);margin:12px 0}
.bg-cream2{background:var(--bg-2)}
.bg-green{background:var(--ink);color:#fff}
.bg-green .muted{color:#b6b8bc}

/* Áreas de negocio */
.areas{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.area{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:30px;transition:.2s}
.area.feature{background:var(--ink);color:#fff;border-color:var(--ink);box-shadow:var(--shadow)}
.area:hover{transform:translateY(-4px)}
.area .ic{width:52px;height:52px;border-radius:12px;display:grid;place-items:center;margin-bottom:18px;
  background:var(--bg-2);color:var(--ink)}
.area.feature .ic{background:#fff;color:var(--ink)}
.area h3{font-size:22px;margin-bottom:10px}
.area.feature .muted{color:#c9cbce}
.tag{display:inline-block;font-size:11.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;
  padding:4px 10px;border-radius:999px;background:#fff;color:var(--ink);margin-bottom:14px}

/* Mapa didáctico */
.map-wrap{display:grid;grid-template-columns:1.4fr 1fr;gap:28px;align-items:center}
#routesMap{height:440px;border-radius:var(--r);border:1px solid var(--line-2);z-index:1;background:#eaeaea}
.routes-list{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.routes-list li{display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--line);
  border-radius:12px;padding:13px 16px;font-weight:600}
.routes-list .flag{width:34px;height:24px;border-radius:5px;flex:0 0 auto;display:grid;place-items:center;
  font-size:11px;font-weight:800;color:#fff;background:var(--ink)}
.routes-list small{display:block;font-weight:500;color:var(--mut)}
.leaflet-tile{filter:grayscale(1) contrast(1.02) brightness(1.04)}
.leaflet-container{background:#eaeaea}

/* Valores / pasos */
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.val{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.16);border-radius:var(--r);padding:26px}
.val .ic{color:#fff;margin-bottom:14px}
.val h3{font-size:18px;margin-bottom:8px;color:#fff}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.step{position:relative;padding-top:14px}
.step .n{font-size:44px;font-weight:900;color:var(--line-2);line-height:1}
.step h3{font-size:18px;margin:10px 0 8px}

/* Contacto */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:700;margin-bottom:6px}
.field input,.field textarea{width:100%;padding:13px 15px;border:1.5px solid var(--line-2);border-radius:11px;
  font-family:inherit;font-size:15px;background:#fff}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--ink)}
.info-row{display:flex;gap:14px;align-items:flex-start;margin-bottom:22px}
.info-row .ic{width:44px;height:44px;border-radius:11px;background:var(--ink);color:#fff;
  display:grid;place-items:center;flex:0 0 auto}
.info-row b{display:block}
.form-note{font-size:14px;margin-top:10px}

/* Footer */
footer{background:#000;color:#b6b8bc;padding:56px 0 30px}
footer .top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
footer .brand{color:#fff}
footer a:hover{color:#fff}
footer .fin{margin-top:34px;padding-top:20px;border-top:1px solid rgba(255,255,255,.14);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13px;color:#83868b}

.reveal{opacity:0;transform:translateY(18px);transition:.6s}
.reveal.in{opacity:1;transform:none}

@media(max-width:900px){
  .areas,.grid4,.steps,.contact,.map-wrap,footer .top{grid-template-columns:1fr}
  .nav-links{position:fixed;inset:74px 0 auto 0;background:#fff;flex-direction:column;
    align-items:flex-start;gap:6px;padding:18px 24px;border-bottom:1px solid var(--line);display:none}
  .nav-links.open{display:flex}
  .nav-tog{display:block}
  #routesMap{height:340px}
}