:root{
  /* Paleta fría / hielo */
  --bg:#3d7cb3;
  --surface:#ffffff;
  --text:#0b1b2b;
  --muted:#4a627a;
  --primary:#0b6fb8;       /* azul más oscuro tipo hielo */
  --primary-600:#085a9c;   /* azul profundo para hover */
  --accent:#16a34a;        /* conservar verde para WhatsApp */
  --border:#e3effa;
  --shadow:0 12px 30px rgba(11,27,43,.08);
  --radius:14px;
  --space:clamp(.75rem,1.2vw,1rem);
  --space-lg:clamp(1.25rem,2vw,1.75rem);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:linear-gradient(180deg,var(--bg),#e8f3ff);color:var(--text);font:16px/1.6 ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif}
.container{max-width:1100px;margin:auto;padding:0 1rem}
.skip-link{position:absolute;left:-9999px;top:auto}
.skip-link:focus{left:1rem;top:1rem;background:#000;color:#fff;padding:.5rem 1rem;border-radius:.25rem;z-index:1000}
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.9);backdrop-filter:saturate(150%) blur(10px);border-bottom:1px solid var(--border);will-change:background, box-shadow}
.site-header.scrolled{background:rgba(255,255,255,.95);box-shadow:var(--shadow)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;min-height:64px}
.brand{margin:0;font-weight:900;letter-spacing:.06em;text-transform:uppercase}
.site-nav{display:flex;gap:.5rem}
.site-nav a{color:var(--muted);text-decoration:none;padding:.6rem .75rem;border-radius:10px}
.site-nav a:hover{color:var(--text);background:rgba(37,99,235,.08)}

/* Mobile nav */
.nav-toggle{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:10px;border:1px solid var(--border);background:var(--surface)}
.nav-toggle span{display:inline-block;width:18px;height:2px;background:var(--text);position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text)}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.primary-nav{position:fixed;inset:auto 0 0 0;transform:translateY(100%);background:var(--surface);border-top:1px solid var(--border);box-shadow:0 -10px 30px rgba(0,0,0,.06);padding:1rem;display:grid;gap:.25rem;transition:transform .25s ease;z-index:90}
.nav-open .primary-nav{transform:translateY(0)}
.nav-open{overflow:hidden}

@media (min-width: 768px){
  .nav-toggle{display:none}
  .primary-nav{position:static;transform:none;box-shadow:none;display:flex;padding:0;border:none}
}
main{display:block}
.hero{padding:5rem 0 2.5rem;position:relative}
/* halo frío en el héroe */
.hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(55% 55% at 65% 8%, rgba(11,111,184,.18), transparent 60%),
  radial-gradient(35% 35% at 20% 20%, rgba(139,196,255,.22), transparent 60%)}
.hero h1{font-size:clamp(2.2rem,6vw,3.25rem);margin:0 0 .5rem}
.hero p.lead{font-size:clamp(1.05rem,2.1vw,1.25rem);color:var(--muted);margin:0}
.section{padding:3rem 0;border-top:1px solid var(--border);scroll-margin-top:80px}
.cards{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1rem;box-shadow:var(--shadow)}
.card h3{margin:.25rem 0 .5rem}
pre{white-space:pre-wrap;background:#0f172a;color:#e7ecff;border:1px solid #0b1220;padding:1rem;border-radius:10px;overflow:auto}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace}
.kicker{display:inline-block;text-transform:uppercase;letter-spacing:.12em;color:var(--primary);font-weight:800;font-size:.8rem;margin-bottom:.5rem}
.cta{display:inline-block;background:var(--primary);color:#fff;text-decoration:none;padding:.8rem 1.1rem;border-radius:12px;font-weight:800;box-shadow:var(--shadow)}
.cta:hover{background:var(--primary-600)}
.grid-2{display:grid;gap:1.5rem;grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.site-footer{border-top:1px solid var(--border);padding:2rem 0;color:var(--muted);background:var(--surface)}

/* Texto escarchado / hielo */
.frost-text{
  background-image: linear-gradient(180deg,#d8efff 10%,#9bd1ff 50%,#0b6fb8 95%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  text-shadow:
    0 1px 0 rgba(255,255,255,.9),
    0 2px 4px rgba(8, 90, 156, .28),
    0 10px 22px rgba(8, 70, 130, .18);
  filter: drop-shadow(0 10px 18px rgba(8, 70, 130, .12));
}

/* Trust badges */
.badges{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:var(--space)}
.badge{background:#e6f4ff;color:#0b3a63;border:1px solid #cfe8ff;padding:.4rem .6rem;border-radius:999px;font-weight:700;font-size:.8rem}

/* Process steps */
.steps{counter-reset:step}
.steps li{list-style:none;position:relative;margin:0 0 var(--space);padding-left:2.2rem}
.steps li::before{counter-increment:step;content:counter(step);position:absolute;left:0;top:.2rem;width:1.6rem;height:1.6rem;border-radius:999px;background:var(--primary);color:#fff;display:grid;place-items:center;font-weight:800;box-shadow:var(--shadow)}

/* Floating action buttons */
.fab{position:fixed;right:1rem;bottom:1rem;display:grid;gap:.75rem;z-index:1000}
.fab a{display:flex;align-items:center;gap:.5rem;text-decoration:none;border-radius:999px;padding:.9rem 1.1rem;font-weight:800;box-shadow:var(--shadow);border:1px solid rgba(0,0,0,.06)}
.fab a .ico{font-size:1.1rem}
.fab a.whatsapp{background:#25D366;color:#0e2a12}
.fab a.phone{background:var(--primary);color:#fff}

/* Utilities */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.mt-0{margin-top:0}
.mb-0{margin-bottom:0}
.mt-lg{margin-top:var(--space-lg)}
.mb-lg{margin-bottom:var(--space-lg)}

@media (min-width: 768px){
  .hero{padding:6rem 0 3rem}
  .fab{right:1.5rem;bottom:1.5rem}
}

/* Scroll reveal animations */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s cubic-bezier(.2,.8,.2,1),transform .6s cubic-bezier(.2,.8,.2,1)}
.reveal.in-view{opacity:1;transform:translateY(0)}
section.out-view{opacity:.35;transition:opacity .4s ease}

/* Mobile sticky CTA bar */
.mobile-cta{position:fixed;left:0;right:0;bottom:0;z-index:95;display:grid;grid-template-columns:1fr 1fr;gap:.5rem;padding:.5rem env(safe-area-inset-right) calc(.5rem + env(safe-area-inset-bottom)) env(safe-area-inset-left);background:linear-gradient(180deg,rgba(255,255,255,.2),rgba(255,255,255,.9));backdrop-filter:blur(10px);border-top:1px solid var(--border)}
.mobile-cta a{display:flex;align-items:center;justify-content:center;gap:.5rem;text-decoration:none;border-radius:12px;padding:.9rem 1.1rem;font-weight:800;box-shadow:var(--shadow);border:1px solid rgba(0,0,0,.06)}
.mobile-cta .call{background:var(--primary);color:#fff}
.mobile-cta .wa{background:#25D366;color:#0e2a12}

@media (min-width: 768px){
  .mobile-cta{display:none}
}

/* Prefer reduced motion */
@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}