/* ===== SOFEM — Propuesta 1: Corporativo sobrio ===== */
:root{
  --azul-900:#0e3a5f;
  --azul-700:#13507f;
  --azul-500:#1c6fb3;
  --azul-400:#478ac9;
  --azul-100:#e6f0f8;
  --tinta:#1f2d3d;
  --gris:#5b6b7b;
  --gris-100:#f4f7fa;
  --blanco:#ffffff;
  --borde:#e2e9f0;
  --sombra:0 10px 30px rgba(14,58,95,.08);
  --sombra-card:0 12px 28px rgba(14,58,95,.10);
  --radio:14px;
  --max:1140px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Open Sans',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  color:var(--tinta);background:var(--blanco);line-height:1.65;
}
h1,h2,h3{font-family:'Poppins',sans-serif;line-height:1.2;color:var(--azul-900)}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--borde)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand-logo{height:42px;width:auto}
.nav-list{list-style:none;display:flex;align-items:center;gap:30px}
.nav-list a{font-weight:600;color:var(--gris);font-size:.96rem;transition:color .2s}
.nav-list a:hover{color:var(--azul-500)}
.nav-cta{background:var(--azul-500);color:#fff!important;padding:10px 20px;border-radius:999px}
.nav-cta:hover{background:var(--azul-700)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.nav-toggle span{width:24px;height:2px;background:var(--azul-900);border-radius:2px}

/* Hero */
.hero{background:linear-gradient(135deg,var(--azul-900),var(--azul-500));color:#fff;
  position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 80% 20%,rgba(255,255,255,.12),transparent 45%)}
.hero-inner{display:grid;grid-template-columns:1.2fr .8fr;gap:50px;align-items:center;
  padding:88px 24px;position:relative;z-index:1}
.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:.78rem;font-weight:700;
  color:var(--azul-400)}
.hero .eyebrow{color:#bfe0ff}
.hero h1{color:#fff;font-size:clamp(2.1rem,4vw,3.2rem);margin:14px 0 18px}
.lead{font-size:1.08rem;color:rgba(255,255,255,.9);max-width:42ch}
.hero-actions{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.btn{display:inline-block;font-weight:600;padding:13px 26px;border-radius:999px;
  cursor:pointer;border:2px solid transparent;transition:.2s;font-size:.98rem}
.btn-primary{background:#fff;color:var(--azul-700)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(0,0,0,.18)}
.btn-ghost{border-color:rgba(255,255,255,.6);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-block{width:100%;text-align:center;background:var(--azul-500);color:#fff}
.btn-block:hover{background:var(--azul-700)}
.hero-media{position:relative;border-radius:20px;overflow:hidden;
  border:1px solid rgba(255,255,255,.2);box-shadow:0 24px 60px rgba(0,0,0,.32)}
.hero-media img{display:block;width:100%;height:100%;aspect-ratio:4/3;object-fit:cover}

/* Secciones */
.section{padding:84px 0}
.section-alt{background:var(--gris-100)}
.section-head{text-align:center;max-width:640px;margin:0 auto 50px}
.section-head h2{font-size:clamp(1.8rem,3vw,2.4rem);margin:8px 0}
.section-sub{color:var(--gris)}

/* Tarjetas servicios */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.cards-3{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border:1px solid var(--borde);border-radius:var(--radio);
  padding:30px 26px;box-shadow:var(--sombra);transition:.25s}
.card:hover{transform:translateY(-6px);box-shadow:var(--sombra-card);border-color:#cfe0ef}
.card-icon{display:inline-grid;place-items:center;width:56px;height:56px;border-radius:14px;
  background:var(--azul-100);color:var(--azul-500);margin-bottom:18px}
.card h3{font-size:1.2rem;margin-bottom:8px}
.card h3 span{color:var(--azul-400)}
.card p{color:var(--gris);font-size:.96rem}

/* Split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:54px;align-items:center}
.split-copy h2{font-size:clamp(1.8rem,3vw,2.3rem);margin:8px 0 16px}
.split-copy p{color:var(--gris)}
.split-media{border:1px solid var(--borde);border-radius:20px;overflow:hidden;
  box-shadow:var(--sombra-card)}
.media-img{display:block;width:100%;height:100%;aspect-ratio:4/3;object-fit:cover}
.check-list{list-style:none;margin-top:22px;display:grid;gap:12px}
.check-list li{padding-left:32px;position:relative;color:var(--tinta)}
.check-list li::before{content:"✓";position:absolute;left:0;top:0;width:22px;height:22px;
  background:var(--azul-100);color:var(--azul-500);border-radius:50%;display:grid;place-items:center;
  font-size:.8rem;font-weight:700}

/* Valores */
.value{background:#fff;border:1px solid var(--borde);border-radius:var(--radio);padding:28px;
  border-top:4px solid var(--azul-400)}
.value h3{font-size:1.15rem;margin-bottom:10px}
.value p{color:var(--gris);font-size:.96rem}

/* Contacto */
.section-contact{background:var(--gris-100)}
.contact-data{list-style:none;margin-top:22px;display:grid;gap:12px;color:var(--gris)}
.contact-data a{color:var(--azul-500);font-weight:600}
.contact-data em{color:#b06a00;font-style:normal;font-size:.85rem}
.contact-form{background:#fff;border:1px solid var(--borde);border-radius:var(--radio);
  padding:32px;box-shadow:var(--sombra)}
.field{margin-bottom:18px}
.field label{display:block;font-weight:600;margin-bottom:6px;font-size:.92rem}
.field input,.field textarea{width:100%;padding:12px 14px;border:1px solid var(--borde);
  border-radius:10px;font:inherit;color:var(--tinta);background:#fbfdff}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--azul-400);
  box-shadow:0 0 0 3px rgba(71,138,201,.18)}
.form-note{font-size:.82rem;color:var(--gris);margin-top:12px;text-align:center}

/* Footer */
.site-footer{background:var(--azul-900);color:#cfe0ef;padding:34px 0}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer-logo{height:30px;background:#fff;padding:8px 12px;border-radius:8px;box-sizing:content-box}

/* Responsive */
@media(max-width:900px){
  .hero-inner{grid-template-columns:1fr;gap:36px}
  .split{grid-template-columns:1fr;gap:32px}
  .cards{grid-template-columns:repeat(2,1fr)}
  .cards-3{grid-template-columns:1fr}
}
@media(max-width:640px){
  .nav-toggle{display:flex}
  .nav-list{position:absolute;top:74px;left:0;right:0;background:#fff;flex-direction:column;
    gap:0;border-bottom:1px solid var(--borde);max-height:0;overflow:hidden;transition:max-height .3s}
  .nav-list.open{max-height:340px}
  .nav-list li{width:100%}
  .nav-list a{display:block;padding:16px 24px;width:100%}
  .nav-cta{border-radius:0}
  .cards{grid-template-columns:1fr}
}