/* =========================================================
   CST — Contrôle et Sécurité du Transport
   cst-congo.com
   Paleta corporativa (del manual de marca)
   ========================================================= */
:root{
  --bleu:   #0085CA;   /* Azul Congo */
  --bleu-d: #006CA5;   /* Azul Congo oscurecido, para hover */
  --jaune:  #FFD100;   /* Amarillo Congo */
  --rouge:  #EF3340;   /* Rojo Congo */
  --fonce:  #2F3837;   /* Verde foncé — fondos oscuros y texto */
  --fonce-2:#232B2A;   /* Verde foncé más profundo */
  --clair:  #FAFAFA;   /* Gris claro */
  --texte:  #2F3837;
  --texte-2:#5C6866;   /* texto secundario */
  --ligne:  #E2E6E5;   /* filetes */

  --max: 1140px;
  --r: 4px;
  --f-tit: "Oswald", "Arial Narrow", sans-serif;
  --f-txt: "IBM Plex Sans", system-ui, sans-serif;
}

*,*::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;
  font-family:var(--f-txt);
  font-size:17px;
  line-height:1.62;
  color:var(--texte);
  background:#fff;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3{font-family:var(--f-tit);font-weight:500;line-height:1.12;margin:0}
h1{font-size:clamp(2.05rem,4.6vw,3.35rem);letter-spacing:-.005em}
h2{font-size:clamp(1.6rem,3.2vw,2.3rem)}
h3{font-size:1.14rem}
p{margin:.65em 0}
a{color:inherit}
img{max-width:100%;display:block}
figure{margin:0}

.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 26px}
:focus-visible{outline:3px solid var(--jaune);outline-offset:2px}
.skip{position:absolute;left:-999px}
.skip:focus{left:12px;top:12px;background:#fff;padding:10px 14px;z-index:99}

/* ---------------- botones ---------------- */
.btn{
  display:inline-block;font-family:var(--f-tit);font-size:1rem;letter-spacing:.03em;
  text-decoration:none;background:var(--bleu);color:#fff;
  padding:13px 26px;border:2px solid var(--bleu);border-radius:var(--r);
  cursor:pointer;transition:background .15s ease,border-color .15s ease,color .15s ease;
}
.btn:hover{background:var(--bleu-d);border-color:var(--bleu-d)}
.btn-jaune{background:var(--jaune);border-color:var(--jaune);color:var(--fonce)}
.btn-jaune:hover{background:#e8bf00;border-color:#e8bf00;color:var(--fonce)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-ghost:hover{background:#fff;color:var(--fonce);border-color:#fff}
.btn-sm{padding:9px 18px;font-size:.94rem}

/* ---------------- barra superior ---------------- */
.bar{position:sticky;top:0;z-index:50;background:var(--fonce);color:#fff}
.bar-in{display:flex;align-items:center;gap:26px;min-height:76px}
.brand{flex:0 0 auto;display:flex;align-items:center}
.brand img{height:42px;width:auto}

.nav{display:flex;gap:24px;margin-left:auto;font-size:.96rem}
.nav a{text-decoration:none;color:#fff;padding:6px 0;border-bottom:2px solid transparent}
.nav a:hover{border-bottom-color:var(--jaune)}

.bar-right{display:flex;align-items:center;gap:14px}
.lang{display:flex;border:1px solid rgba(255,255,255,.32);border-radius:var(--r);overflow:hidden}
.lang-b{
  font-family:var(--f-tit);font-size:.85rem;letter-spacing:.07em;
  background:transparent;color:rgba(255,255,255,.7);border:0;padding:7px 11px;cursor:pointer;
}
.lang-b.is-on{background:var(--jaune);color:var(--fonce)}

/* ---------------- hero ---------------- */
.hero{position:relative;overflow:hidden;background:var(--fonce);color:#fff;padding:86px 0 96px}
.route{position:absolute;inset:0;display:flex;justify-content:center;pointer-events:none}
.route svg{height:100%;width:min(780px,92vw);opacity:.11}

.hero-in{position:relative;display:grid;grid-template-columns:1.02fr .98fr;gap:60px;align-items:center}
.hero-txt .lead{font-size:1.13rem;max-width:50ch;color:#D3DAD8;margin-top:20px}
.hero-act{display:flex;flex-wrap:wrap;gap:13px;margin-top:32px}

.hero-art img{
  width:100%;border-radius:6px;
  box-shadow:0 26px 52px rgba(0,0,0,.42);
}
.hero-art figcaption{
  margin-top:16px;font-size:.86rem;color:#9BA7A5;
  border-left:3px solid var(--jaune);padding-left:12px;
}

/* ---------------- bandeau ---------------- */
.strip{background:var(--bleu);color:#fff;padding:44px 0}
.strip-in{display:grid;grid-template-columns:repeat(3,1fr);gap:38px}
.strip h2{font-size:1.16rem;margin-bottom:5px}
.strip p{margin:0;font-size:.95rem;color:#DCEEF9;max-width:34ch}

/* ---------------- secciones ---------------- */
.sec{padding:92px 0}
.sec-h{max-width:22ch}
.sec-lead{max-width:56ch;color:var(--texte-2);margin-top:12px;font-size:1.04rem}
.sec-clair{background:var(--clair)}
.sec-dark{background:var(--fonce-2);color:#fff}
.sec-dark .sec-lead{color:#B9C4C2}
.sec-split{display:grid;grid-template-columns:.92fr 1.08fr;gap:64px;align-items:start}

/* ---------------- productos ---------------- */
.prods{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;margin-top:52px}
.prod-img{
  background:var(--clair);border:1px solid var(--ligne);border-radius:var(--r);
  padding:22px;margin-bottom:22px;display:flex;align-items:center;justify-content:center;
  aspect-ratio:3/2;
}
.prod-img img{max-height:100%;width:auto;object-fit:contain}
.prod h3{margin-bottom:7px;color:var(--bleu)}
.prod p{margin:0;font-size:.97rem;color:var(--texte-2)}
.prod-note{
  margin-top:52px;padding-top:22px;border-top:1px solid var(--ligne);
  color:var(--texte-2);font-size:.97rem;max-width:70ch;
}

/* ---------------- seguridad ---------------- */
.sec-fig{background:#fff;border-radius:var(--r);padding:18px;box-shadow:0 20px 44px rgba(0,0,0,.3)}
.sec-fig img{width:100%;border-radius:2px}
.secu{list-style:none;margin:36px 0 0;padding:0}
.secu li{padding:18px 0;border-top:1px solid rgba(255,255,255,.16)}
.secu li:last-child{border-bottom:1px solid rgba(255,255,255,.16)}
.secu h3{color:var(--jaune);margin-bottom:4px}
.secu p{margin:0;font-size:.97rem;color:#B9C4C2;max-width:56ch}

/* ---------------- pasos ---------------- */
.steps{list-style:none;margin:52px 0 0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:34px}
.steps li{border-top:3px solid var(--bleu);padding-top:18px}
.step-n{display:block;font-family:var(--f-tit);font-size:.95rem;letter-spacing:.12em;color:var(--rouge);margin-bottom:9px}
.steps h3{margin-bottom:6px}
.steps p{margin:0;font-size:.96rem;color:var(--texte-2)}

/* ---------------- ficha técnica ---------------- */
.specs-txt .btn{margin-top:26px}
.specs{margin:0}
.specs > div{
  display:grid;grid-template-columns:minmax(120px,.4fr) 1fr;gap:18px;
  padding:15px 0;border-bottom:1px solid var(--ligne);
}
.specs > div:first-child{border-top:1px solid var(--ligne)}
.specs dt{font-family:var(--f-tit);color:var(--bleu)}
.specs dd{margin:0;font-size:.99rem;color:var(--texte-2)}

/* ---------------- contacto ---------------- */
.coord{margin:34px 0 0}
.coord > div{display:grid;grid-template-columns:minmax(110px,.36fr) 1fr;gap:18px;padding:16px 0;border-top:1px solid var(--ligne)}
.coord > div:last-child{border-bottom:1px solid var(--ligne)}
.coord dt{font-family:var(--f-tit);color:var(--bleu)}
.coord dd{margin:0;font-size:.99rem;color:var(--texte-2)}
.coord a{color:var(--texte-2)}

.form{
  display:grid;grid-template-columns:1fr 1fr;gap:18px;
  background:var(--clair);border:1px solid var(--ligne);border-radius:var(--r);padding:30px;
}
.fld{display:flex;flex-direction:column;gap:7px}
.fld-full{grid-column:1/-1}
.fld span{font-size:.87rem;font-weight:500}
.fld input,.fld select,.fld textarea{
  font-family:inherit;font-size:1rem;color:var(--texte);background:#fff;
  border:1px solid #CDD5D3;border-radius:var(--r);padding:12px;
}
.fld textarea{resize:vertical}
.form .btn{grid-column:1/-1;justify-self:start}
.hp{position:absolute;left:-9999px}

/* ---------------- pie ---------------- */
.foot{background:var(--fonce);color:#9BA7A5;font-size:.9rem;padding:44px 0}
.foot-in{display:grid;grid-template-columns:auto 1fr auto;gap:38px;align-items:center}
.foot-logo{height:52px;width:auto}
.foot-txt p,.foot-legal p{margin:2px 0}
.foot-legal{text-align:right}
.foot a{color:#C6CFCD}

/* ---------------- responsive ---------------- */
@media (max-width:980px){
  .hero-in,.sec-split,.prods,.strip-in,.steps{grid-template-columns:1fr;gap:44px}
  .prods{gap:46px}
  .steps{gap:28px}
  .hero{padding:60px 0 68px}
  .sec{padding:66px 0}
  .nav{display:none}
  .hero-art{max-width:520px}
  .sec-h,.sec-lead{max-width:none}
  .foot-in{grid-template-columns:1fr;gap:22px;text-align:left}
  .foot-legal{text-align:left}
}
@media (max-width:560px){
  body{font-size:16px}
  .bar-in{min-height:64px;gap:12px}
  .brand img{height:34px}
  .form{grid-template-columns:1fr;padding:22px}
  .specs > div,.coord > div{grid-template-columns:1fr;gap:3px}
  .prod-img{aspect-ratio:auto;padding:16px}
}