:root{
  --navy:#0d1b2a; --navy-900:#0a1621; --text:#1f2937; --muted:#4b5563;
  --bg:#ffffff; --card:#ffffff; --border:#e5e7eb;
  --primary:#2563eb; --primary-700:#1e40af; /* azul CTA */
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Poppins', 'Nunito', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
.container{width:min(1100px,92vw);margin:0 auto}

/* Header */
.header{position:sticky;top:0;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--border);z-index:1000}
.nav{display:flex;align-items:center;gap:1rem;justify-content:space-between;padding:.6rem 0}
.brand{display:flex;align-items:center}
.logo{height:36px;width:auto}
.menu{display:flex;gap:1.2rem;align-items:center}
.menu a{color:#111827;font-weight:500}
.link-login{color:var(--primary);font-weight:600}
.hamburger{display:none;background:none;border:none;cursor:pointer}
.hamburger span{display:block;width:24px;height:2px;background:#111827;margin:5px 0;border-radius:2px}

/* Hero referencia */
.hero-ref{position:relative;min-height:56vh;display:flex;align-items:center;justify-content:center;text-align:center}
.hero-bg{position:absolute;inset:0;overflow:hidden}
.hero-bg img{width:100%;height:100%;object-fit:cover;filter:blur(3px) brightness(0.9)}
.hero-bg .overlay{position:absolute;inset:0;background:linear-gradient(0deg, rgba(255,255,255,0.9), rgba(255,255,255,0.6))}
.hero-center{position:relative;padding:3rem 0}
.hero-center h1{font-weight:300;color:#1f2937;font-size:clamp(1.8rem,4vw,3rem);margin:0 0 .6rem}
.hero-center .bold{font-weight:700}
.hero-center p{color:#4b5563;margin-bottom:1.2rem}
.btn{display:inline-block;border-radius:.6rem;padding:.9rem 1.3rem;font-weight:700;transition:.2s ease}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-700)}

/* Sections */
.section{padding:3rem 0}
.section.alt{background:#f9fafb}
.section-title{margin:0 0 .5rem;font-weight:700;color:#111827}
.section-lead{color:#6b7280;margin-bottom:1.2rem}
.card{background:var(--card);border:1px solid var(--border);border-radius:.8rem;padding:1rem}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.list{list-style:none;padding:0;margin:.6rem 0;color:#6b7280}
.list.number{list-style:decimal; padding-left:1.2rem}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:1.2rem}
.form{background:#fff;border:1px solid var(--border);padding:1rem;border-radius:.8rem}
.field{margin-bottom:.9rem}
label{display:block;margin-bottom:.3rem;color:#4b5563}
input,textarea{width:100%;padding:.8rem;border-radius:.6rem;border:1px solid var(--border);background:#fff;color:#111827}
input:focus,textarea:focus{outline:2px solid rgba(37,99,235,.35)}
.form-status{margin-top:.6rem;color:#6b7280}

/* Footer */
.footer{border-top:1px solid var(--border);padding:1.6rem 0;background:#f9fafb;color:#6b7280}
.footer-bottom{text-align:center}

/* Responsive */
@media (max-width: 900px){
  .menu{display:none}
  .hamburger{display:block}
  .hero-ref{min-height:60vh}
  .cards{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
}