:root{
  --ink:#111827;
  --muted:#5b6472;
  --soft:#f4f5f6;
  --line:#e4e7eb;
  --accent:#f05a00;
  --dark:#0d1117;
  --white:#ffffff;
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Arial,Helvetica,sans-serif;color:var(--ink);background:#fff;line-height:1.55}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(var(--max),calc(100% - 40px));margin:auto}
.topbar{position:absolute;z-index:10;left:0;right:0;top:0;color:#fff}
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:18px 0;border-bottom:1px solid rgba(255,255,255,.25)}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.04em}
.logo-mark{width:35px;height:35px;position:relative}
.logo-mark:before,.logo-mark:after{content:"";position:absolute;bottom:0;background:#fff}
.logo-mark:before{left:0;width:19px;height:28px;clip-path:polygon(50% 0,100% 24%,100% 100%,0 100%,0 24%)}
.logo-mark:after{right:0;width:14px;height:19px;background:var(--accent);clip-path:polygon(0 20%,50% 0,100% 20%,100% 100%,0 100%)}
.menu{display:flex;align-items:center;gap:24px;font-size:13px;font-weight:700}
.menu a{opacity:.92}.menu a:hover{color:#ff7a2a}
.cta{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--accent);color:#fff;padding:14px 20px;font-weight:800;border:0}
.cta.outline{background:transparent;border:1px solid rgba(255,255,255,.75)}
.cta.dark-outline{background:transparent;color:var(--ink);border:1px solid var(--ink)}
.mobile-toggle{display:none;background:transparent;border:0;color:#fff;font-size:28px}
.hero{min-height:650px;color:#fff;display:flex;align-items:center;position:relative;background:
linear-gradient(90deg,rgba(5,8,12,.88),rgba(5,8,12,.48) 55%,rgba(5,8,12,.18)),
url('https://images.unsplash.com/photo-1503387762-592deb58ef4e?auto=format&fit=crop&w=1800&q=85') center/cover no-repeat}
.hero:after{content:"";position:absolute;inset:auto 0 0 0;height:130px;background:linear-gradient(transparent,rgba(0,0,0,.25));pointer-events:none}
.hero-content{position:relative;z-index:2;padding-top:95px;max-width:720px}
.eyebrow{font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;display:flex;align-items:center;gap:12px}
.eyebrow:before{content:"";width:26px;height:3px;background:var(--accent);display:inline-block}
.hero h1{font-size:clamp(42px,6vw,74px);line-height:.98;margin:20px 0 18px;letter-spacing:-.035em}
.hero p{font-size:20px;max-width:640px;color:#f0f2f5}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px}
.service-strip{display:grid;grid-template-columns:repeat(6,1fr);background:#fff;border-bottom:1px solid var(--line)}
.service-strip a{padding:26px 10px;text-align:center;border-right:1px solid var(--line);font-size:12px;font-weight:800;text-transform:uppercase}
.service-strip a:last-child{border-right:0}
.service-strip .ico{font-size:25px;display:block;margin-bottom:8px}
section{padding:82px 0}
.section-head{display:grid;grid-template-columns:1.35fr .65fr;gap:45px;align-items:end;margin-bottom:34px}
.section-head h2{font-size:clamp(34px,4vw,52px);line-height:1.04;margin:10px 0 0;letter-spacing:-.03em}
.section-head p{color:var(--muted)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{border:1px solid var(--line);background:#fff}
.card-media{aspect-ratio:16/9;background:#ddd center/cover no-repeat}
.card-body{padding:20px}
.card h3{margin:0 0 8px;font-size:19px}
.card p{margin:0 0 18px;color:var(--muted);font-size:14px}
.more{font-size:12px;font-weight:800;color:var(--accent);text-transform:uppercase;letter-spacing:.03em}
.dark-section{background:#111820;color:#fff}
.dark-section .section-head p{color:#c9d0d7}
.project-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.project{min-height:320px;position:relative;display:flex;align-items:flex-end;padding:18px;background-size:cover;background-position:center;overflow:hidden}
.project:before{content:"";position:absolute;inset:0;background:linear-gradient(transparent 35%,rgba(0,0,0,.9))}
.project>div{position:relative;z-index:2}
.project small{color:#ff8b45;font-weight:800;text-transform:uppercase}
.project h3{margin:4px 0 0;font-size:20px}
.process{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step{position:relative}
.step-num{font-size:44px;color:#e7eaee;font-weight:900}
.step h3{margin:0 0 8px}
.step p{color:var(--muted);font-size:14px}
.banner{padding:65px 0;background:
linear-gradient(90deg,rgba(8,11,15,.9),rgba(8,11,15,.65)),
url('https://images.unsplash.com/photo-1541976590-713941681591?auto=format&fit=crop&w=1800&q=85') center/cover no-repeat;color:#fff}
.banner-inner{display:flex;align-items:center;justify-content:space-between;gap:30px}
.banner h2{font-size:42px;margin:8px 0}
.banner p{max-width:690px;color:#e5e7eb}
footer{background:#090c10;color:#c4c9cf;padding:42px 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
footer h4{color:#fff;margin-top:0}
footer a{display:block;margin:8px 0}
.page-hero{min-height:430px;display:flex;align-items:end;padding:145px 0 60px;color:#fff;background:
linear-gradient(90deg,rgba(5,8,12,.85),rgba(5,8,12,.28)),
url('https://images.unsplash.com/photo-1504307651254-35680f356dfd?auto=format&fit=crop&w=1800&q=85') center/cover no-repeat}
.page-hero h1{font-size:clamp(48px,6vw,76px);margin:8px 0 12px}
.page-hero p{font-size:20px;max-width:650px}
.filters{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:28px}
.filter{padding:12px 18px;background:#fff;border:1px solid var(--line);font-weight:700}
.filter.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.form-layout{display:grid;grid-template-columns:1.3fr .7fr;gap:45px}
form{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1/-1}
input,select,textarea{width:100%;padding:14px;border:1px solid #d9dde2;font:inherit;background:#fff}
textarea{min-height:150px;resize:vertical}
.info-box{background:var(--soft);padding:28px}
.info-row{padding:16px 0;border-bottom:1px solid #dfe3e7}
.info-row:last-child{border-bottom:0}
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.article{border:1px solid var(--line)}
.article .card-body{min-height:190px}
.kicker{color:var(--accent);font-size:12px;font-weight:800;text-transform:uppercase}
.service-detail{display:grid;grid-template-columns:.8fr 1.2fr;gap:45px}
.service-detail aside{background:var(--soft);padding:24px;height:max-content}
.service-detail aside a{display:block;padding:12px 0;border-bottom:1px solid #dce0e5;font-weight:700}
.service-detail h2{font-size:40px;line-height:1.05}
.checks{display:grid;grid-template-columns:1fr 1fr;gap:8px 20px;padding:0;list-style:none}
.checks li:before{content:"✓";color:var(--accent);font-weight:900;margin-right:8px}

@media (max-width:900px){
 .menu{display:none;position:absolute;top:74px;left:20px;right:20px;background:#10151c;padding:18px;flex-direction:column;align-items:flex-start}
 .menu.open{display:flex}
 .mobile-toggle{display:block}
 .nav>.cta{display:none}
 .service-strip{grid-template-columns:repeat(3,1fr)}
 .section-head,.form-layout,.service-detail{grid-template-columns:1fr}
 .grid-3,.article-grid{grid-template-columns:repeat(2,1fr)}
 .project-grid,.process{grid-template-columns:repeat(2,1fr)}
 .banner-inner,.footer-grid{display:grid;grid-template-columns:1fr}
}
@media (max-width:620px){
 .container{width:min(100% - 26px,var(--max))}
 .hero{min-height:610px}
 .hero h1{font-size:45px}
 .hero p{font-size:17px}
 .service-strip{grid-template-columns:repeat(2,1fr)}
 .grid-3,.article-grid,.project-grid,.process{grid-template-columns:1fr}
 section{padding:60px 0}
 .banner h2{font-size:34px}
 form{grid-template-columns:1fr}
 .field.full{grid-column:auto}
}


/* ===== V2 — identidad Ing. Ernesto Carrillo ===== */
.logo{gap:12px}
.logo-mark{display:none!important}
.brand-symbol{
  display:inline-flex;
  width:58px;
  height:58px;
  align-items:center;
  justify-content:center;
  background:transparent;
  border:0;
  box-shadow:none;
}
.brand-symbol img{
  width:100%;
  height:100%;
  object-fit:contain;
  filter:drop-shadow(0 6px 10px rgba(0,0,0,.20));
}
.brand-word{
  color:#fff;
  font-size:13px;
  letter-spacing:.1em;
  line-height:1.15;
  font-weight:800;
}
footer .brand-word{color:#fff}
.nav{padding-top:13px;padding-bottom:13px}
.topbar{background:linear-gradient(180deg,rgba(4,7,10,.42),transparent)}
.hero{min-height:690px}
.hero-content{padding-top:115px}
.hero h1{max-width:760px}
.card{transition:transform .22s ease,box-shadow .22s ease}
.card:hover{transform:translateY(-4px);box-shadow:0 18px 38px rgba(12,20,28,.11)}
.project{transition:transform .22s ease}
.project:hover{transform:translateY(-3px)}
.page-hero{min-height:465px}
.page-hero .container{padding-bottom:3px}
.section-head h2{font-weight:800}
.footer-brandline{margin-top:12px;color:#929aa4;font-size:13px}
.demo-note{
  background:#fff7ef;
  border-left:4px solid var(--accent);
  padding:12px 14px;
  color:#5c4637;
  font-size:13px;
  margin-top:18px;
}
@media(max-width:620px){
  .brand-symbol{width:48px;height:48px}
  .brand-word{display:none}
  .hero{min-height:640px}
}


/* ===== V3 — botón flotante WhatsApp ===== */
.whatsapp-float{
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:9999;
  width:62px;
  height:62px;
  border-radius:50%;
  background:#25D366;
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow:0 10px 28px rgba(0,0,0,.28);
  transition:transform .2s ease, box-shadow .2s ease;
  border:3px solid rgba(255,255,255,.92);
}
.whatsapp-float:hover{
  transform:translateY(-3px) scale(1.04);
  box-shadow:0 14px 34px rgba(0,0,0,.34);
}
.whatsapp-float svg{
  width:31px;
  height:31px;
  fill:currentColor;
}
.whatsapp-float .wa-tip{
  position:absolute;
  right:72px;
  white-space:nowrap;
  background:#111820;
  color:#fff;
  font-size:12px;
  font-weight:700;
  padding:8px 10px;
  border-radius:4px;
  opacity:0;
  transform:translateX(6px);
  pointer-events:none;
  transition:.2s ease;
}
.whatsapp-float:hover .wa-tip{
  opacity:1;
  transform:translateX(0);
}
@media(max-width:620px){
  .whatsapp-float{
    width:56px;
    height:56px;
    right:16px;
    bottom:16px;
  }
  .whatsapp-float .wa-tip{display:none}
}


/* ===== V5 — logo transparente con halo blanco ===== */
.brand-symbol{
  width:64px!important;
  height:64px!important;
  padding:0!important;
  background:transparent!important;
  border:0!important;
  box-shadow:none!important;
  overflow:visible!important;
}
.brand-symbol img{
  width:100%!important;
  height:100%!important;
  object-fit:contain!important;
  filter:drop-shadow(0 0 4px rgba(255,255,255,.55))
         drop-shadow(0 5px 10px rgba(0,0,0,.25))!important;
}
.quote-note{
  margin:16px 0 22px;
  padding:12px 14px;
  background:#f7f8f9;
  border-left:3px solid var(--accent);
  font-size:13px;
  color:#4f5965;
}
.micro-services{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:14px;
  margin-top:22px;
}
.micro-service{
  border:1px solid var(--line);
  padding:18px;
  background:#fff;
}
.micro-service h3{
  margin:0 0 7px;
  font-size:16px;
}
.micro-service p{
  margin:0;
  color:var(--muted);
  font-size:13px;
}
.contact-number{
  color:var(--accent);
  font-weight:800;
}
@media(max-width:760px){
  .micro-services{grid-template-columns:1fr}
  .brand-symbol{width:54px!important;height:54px!important}
}


/* ===== V6 — hero preparado para video ===== */
.hero-video-ready{
  overflow:hidden;
  isolation:isolate;
}
.hero-video-ready .hero-media{
  position:absolute;
  inset:0;
  z-index:-3;
}
.hero-video-ready .hero-media video{
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center;
  opacity:0;
  transition:opacity .5s ease;
}
.hero-video-ready.video-active .hero-media video{
  opacity:1;
}
.hero-video-ready .hero-shade{
  position:absolute;
  inset:0;
  z-index:-2;
  background:linear-gradient(90deg,rgba(5,8,12,.88),rgba(5,8,12,.48) 55%,rgba(5,8,12,.18));
  pointer-events:none;
}
.hero-sound{
  position:absolute;
  right:24px;
  bottom:24px;
  z-index:5;
  width:46px;
  height:46px;
  border-radius:50%;
  border:1px solid rgba(255,255,255,.72);
  background:rgba(8,12,16,.55);
  color:#fff;
  backdrop-filter:blur(8px);
  cursor:pointer;
  font-size:18px;
}
.hero-sound:hover{background:rgba(8,12,16,.78)}
@media (prefers-reduced-motion: reduce){
  .hero-video-ready .hero-media{display:none}
}
@media(max-width:620px){
  .hero-sound{right:16px;bottom:82px}
}