/* ===== Variables ===== */
:root{
  --bg: #0b0e14;
  --panel: #111625;
  --muted: #9aa4b2;
  --text: #e6eaf2;
  --brand-500:#1d9bf0;
  --brand-600:#0c7cd6;
  --accent-500:#50e3c2;
  --accent-600:#2ec9a6;
  --ring: rgba(80,227,194,0.35);
  --shadow: 0 10px 25px rgba(0,0,0,.25);
}

/* ===== Reset básico ===== */
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color:var(--text);
  background:
    radial-gradient(1200px 600px at 80% -50%,rgba(29,155,240,.18),transparent 50%),
    radial-gradient(1400px 800px at -20% -60%,rgba(80,227,194,.16),transparent 50%),
    #0b0e14;
  line-height:1.6;
}
img{max-width:100%;display:block}

.container{width:min(1100px, 92%);margin-inline:auto}
.section{padding:72px 0}
.section.alt{background:linear-gradient(180deg,rgba(255,255,255,.02),rgba(255,255,255,0) 40%)}
.section-title{font-size:clamp(1.6rem,2.4vw,2.2rem);margin:0 0 8px;font-weight:800}
.section-subtitle{margin:0 0 32px;color:var(--muted)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.8rem 1.1rem;border-radius:14px;font-weight:700;text-decoration:none;transition:.2s;cursor:pointer;border:1px solid transparent
}
.btn-primary{background:linear-gradient(90deg,var(--brand-500),var(--accent-500));color:#071117;box-shadow:var(--shadow)}
.btn-primary:hover{filter:brightness(1.05)}
.btn-ghost{color:var(--text);border-color:rgba(255,255,255,.12);background:rgba(255,255,255,.02)}
.btn-ghost:hover{background:rgba(255,255,255,.06)}

.site-header{position:sticky;top:0;background:rgba(11,14,20,.6);backdrop-filter: blur(10px);z-index:50;border-bottom:1px solid rgba(255,255,255,.06)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.brand{display:flex;align-items:center;gap:.7rem;text-decoration:none;color:var(--text);font-weight:800;letter-spacing:.3px}
.brand img{filter:drop-shadow(0 4px 10px rgba(29,155,240,.25))}
.nav-toggle{display:none;background:transparent;color:var(--text);border:0;font-size:1.2rem}
.menu{display:flex;gap:1rem;list-style:none;margin:0;padding:0}
.menu a{display:inline-block;padding:.55rem .75rem;border-radius:10px;color:var(--text);text-decoration:none}
.menu a:hover{background:rgba(255,255,255,.06)}

.hero{padding:56px 0 40px}
.hero-inner{display:grid;grid-template-columns:1.2fr .9fr;gap:32px;align-items:center}
.hero h1{font-size:clamp(1.8rem,3.6vw,3rem);line-height:1.1;margin:0 0 10px}
.hero p{color:var(--muted);margin:0 0 18px}
.grad{background:linear-gradient(90deg,var(--brand-500),var(--accent-500));-webkit-background-clip:text;background-clip:text;color:transparent}
.cta{display:flex;gap:.8rem;margin:10px 0 16px}
.badges{display:flex;gap:1rem;list-style:none;margin:14px 0 0;padding:0;color:var(--muted);font-size:.95rem}
.card-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:14px}
.stat{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.08);border-radius:14px;padding:10px;text-align:center}
.stat .num{font-weight:800;font-size:1.2rem}
.hero-illustration{border-radius:16px;border:1px solid rgba(255,255,255,.08);background:linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.01));padding:8px}

.grid{display:grid;gap:18px}
.cards{grid-template-columns:repeat(3,1fr)}
.card{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:16px;padding:18px;box-shadow:var(--shadow)}
.card h3{margin:6px 0 10px}
.card .icon{font-size:1.6rem;background:linear-gradient(90deg,var(--brand-500),var(--accent-500));-webkit-background-clip:text;background-clip:text;color:transparent}

.portfolio{grid-template-columns:repeat(3,1fr)}
.portfolio-item{margin:0;border-radius:16px;overflow:hidden;border:1px solid rgba(255,255,255,.08);background:rgba(255,255,255,.03)}
.thumb{aspect-ratio: 16/10;background:linear-gradient(135deg, rgba(29,155,240,.3), rgba(80,227,194,.3));border-bottom:1px solid rgba(255,255,255,.08)}
.thumb-a{background-image:linear-gradient(135deg, rgba(29,155,240,.35), rgba(255,255,255,.04)), url('data:image/svg+xml;utf8,<svg xmlns=%22http://www.w3.org/2000/svg%22 width=%22400%22 height=%22250%22><text x=%2220%22 y=%22140%22 font-size=%2230%22 fill=%22%23ffffff88%22>Obra civil</text></svg>');background-size:cover}
.thumb-b{background-image:linear-gradient(135deg, rgba(80,227,194,.35), rgba(255,255,255,.04)), url('data:image/svg+xml;utf8,<svg xmlns=%22http://www.w3.org/2000/svg%22 width=%22400%22 height=%22250%22><text x=%2220%22 y=%22140%22 font-size=%2230%22 fill=%22%23ffffff88%22>Seguridad</text></svg>');background-size:cover}
.thumb-c{background-image:linear-gradient(135deg, rgba(155,81,224,.35), rgba(255,255,255,.04)), url('data:image/svg+xml;utf8,<svg xmlns=%22http://www.w3.org/2000/svg%22 width=%22400%22 height=%22250%22><text x=%2220%22 y=%22140%22 font-size=%2230%22 fill=%22%23ffffff88%22>Data Center</text></svg>');background-size:cover}

.about{display:grid;grid-template-columns:1.1fr .9fr;gap:22px;align-items:start}
.about .facts{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.about .facts li{display:flex;align-items:center;justify-content:space-between;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);padding:10px;border-radius:12px}
.checklist{list-style:none;margin:14px 0 0;padding:0;display:grid;gap:.4rem;color:var(--muted)}
.checklist i{color:var(--accent-500);margin-right:.5rem}

.logos{display:grid;grid-template-columns:repeat(6,1fr);gap:16px;align-items:center}
.logo{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:16px;text-align:center;color:var(--muted)}

.contact{display:grid;grid-template-columns:1.1fr .9fr;gap:22px}
.contact-list{list-style:none;margin:12px 0 0;padding:0;display:grid;gap:.5rem;color:var(--muted)}
.form{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:16px;padding:18px}
.field{display:grid;margin-bottom:12px}
label{font-weight:600;margin-bottom:.3rem}
input, select, textarea{
  background:rgba(255,255,255,.02);border:1px solid rgba(255,255,255,.1);border-radius:10px;padding:.7rem;color:var(--text);
  outline-color:var(--accent-600);
}
input:focus, select:focus, textarea:focus{box-shadow:0 0 0 6px var(--ring)}
.error{color:#ff8b8b;height:1rem}
.form-success{margin-top:8px;color:var(--accent-500);font-weight:700}

.site-footer{border-top:1px solid rgba(255,255,255,.08);padding:18px 0;margin-top:32px;background:rgba(255,255,255,.02)}
.footer-inner{display:flex;align-items:center;justify-content:space-between;color:var(--muted)}
.socials a{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:10px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);text-decoration:none;color:var(--text);margin-left:8px}
.socials a:hover{background:rgba(255,255,255,.1)}

/* WhatsApp floating */
.whatsapp{
  position:fixed;right:18px;bottom:18px;width:56px;height:56px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#25D366,#128C7E);color:white;text-decoration:none;
  box-shadow:var(--shadow);font-size:1.4rem;border:0;
}

/* ===== Nav responsive ===== */
@media (max-width: 920px){
  .hero-inner, .cards, .portfolio, .about, .contact{grid-template-columns:1fr}
  .menu{position:fixed;inset:64px 16px auto 16px;background:rgba(6,10,16,.96);border:1px solid rgba(255,255,255,.1);
    border-radius:16px;flex-direction:column;padding:12px;display:none}
  .nav-toggle{display:inline-flex}
  .menu.open{display:flex}
}