/* ==========================================================================
   HMB INGENIERÍA — Design system / responsive layout
   - CSS puro, sin frameworks ni fuentes externas.
   - Mobile-first adaptations.
   - Variables centralizadas para facilitar futuras páginas sectoriales.
   ========================================================================== */

:root{
  --navy:#071a32;
  --navy-2:#0b2748;
  --navy-3:#0e355c;
  --blue:#0878df;
  --blue-2:#31a4ff;
  --text:#102746;
  --muted:#5d6b7c;
  --light:#f4f7fb;
  --line:#dce5ef;
  --white:#fff;
  --shadow:0 12px 34px rgba(7,26,50,.08);
  --radius:8px;
  --container:min(1180px,92vw);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:88px}
body{
  margin:0;
  font-family:Arial,Helvetica,sans-serif;
  color:var(--text);
  background:#fff;
  line-height:1.55;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit}
section{scroll-margin-top:88px}
.container{width:var(--container);margin-inline:auto}

.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
}
.skip-link{
  position:fixed;left:16px;top:12px;z-index:100;
  padding:10px 14px;background:#fff;color:var(--navy);
  transform:translateY(-150%);transition:transform .2s
}
.skip-link:focus{transform:translateY(0)}

.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid #e7edf4;
  box-shadow:0 2px 18px rgba(7,26,50,.06);
  backdrop-filter:saturate(140%) blur(10px);
}
.nav-wrap{
  min-height:84px;
  display:flex;
  align-items:center;
  gap:24px;
}
.brand{display:block;flex:0 0 auto}
.brand img{width:205px;height:auto}
.site-nav{
  margin-left:auto;
  display:flex;align-items:center;gap:26px;
}
.site-nav a{
  position:relative;
  padding:30px 0;
  color:var(--text);
  font-size:12px;font-weight:800;
  letter-spacing:.25px;text-transform:uppercase;
}
.site-nav a::after{
  content:"";position:absolute;left:0;right:100%;bottom:22px;height:2px;
  background:var(--blue);transition:right .22s ease;
}
.site-nav a:hover::after,.site-nav a:focus-visible::after{right:0}
.header-cta{
  flex:0 0 auto;
  background:var(--blue);color:#fff;
  padding:13px 18px;border-radius:5px;
  font-size:12px;font-weight:800;
  transition:transform .2s,background .2s;
}
.header-cta:hover{background:#0565be;transform:translateY(-1px)}
.menu-toggle{display:none;border:0;background:none;color:var(--navy);font-size:27px;cursor:pointer}

/* Hero: the first image is the LCP asset and is loaded eagerly. */
.hero{
  position:relative;
  min-height:650px;
  overflow:hidden;
  background:var(--navy);
  color:#fff;
}
.hero-media,.hero-slide,.hero-slide picture,.hero-slide img{
  position:absolute;inset:0;width:100%;height:100%;
}
.hero-slide{
  opacity:0;
  visibility:hidden;
  transition:opacity .65s ease,visibility .65s ease;
}
.hero-slide.is-active{opacity:1;visibility:visible}
.hero-slide img{object-fit:cover;object-position:center}
.hero-overlay{
  position:absolute;inset:0;z-index:1;
  background:
    linear-gradient(90deg,rgba(3,17,34,.95) 0%,rgba(3,17,34,.82) 33%,rgba(3,17,34,.35) 67%,rgba(3,17,34,.16) 100%),
    linear-gradient(0deg,rgba(3,17,34,.62),transparent 55%);
}
.hero-content{
  position:relative;z-index:2;
  min-height:650px;display:flex;align-items:center;
}
.hero-copy{max-width:730px;padding:60px 0 85px}
.eyebrow,.section-kicker{
  margin:0 0 11px;
  color:var(--blue-2);
  font-size:12px;font-weight:900;
  letter-spacing:1.8px;text-transform:uppercase;
}
.hero h1{
  margin:0 0 22px;
  max-width:760px;
  font-size:clamp(40px,5.2vw,68px);
  line-height:1.03;
  letter-spacing:-1.8px;
}
.hero h1 span{color:#42a9ff}
.hero-lead{
  max-width:670px;margin:0 0 30px;
  color:#eef5fb;font-size:19px;
}
.button-row{display:flex;gap:12px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  min-height:48px;padding:13px 19px;border-radius:5px;
  font-size:12px;font-weight:900;letter-spacing:.15px;
  transition:transform .2s,background .2s,color .2s,border-color .2s;
}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:#0565be;transform:translateY(-2px)}
.btn-light{border:1px solid rgba(255,255,255,.72);color:#fff}
.btn-light:hover{background:#fff;color:var(--navy);transform:translateY(-2px)}

.carousel-arrow{
  position:absolute;z-index:4;top:50%;transform:translateY(-50%);
  width:44px;height:44px;border:1px solid rgba(255,255,255,.5);
  border-radius:50%;background:rgba(0,0,0,.16);color:#fff;
  cursor:pointer;font-size:29px;line-height:1;
  transition:background .2s,border-color .2s;
}
.carousel-arrow:hover,.carousel-arrow:focus-visible{
  background:rgba(0,0,0,.42);border-color:#fff
}
.carousel-prev{left:22px}.carousel-next{right:22px}
.carousel-controls{
  position:absolute;z-index:4;left:50%;bottom:23px;
  transform:translateX(-50%);
  display:flex;align-items:center;gap:14px;
}
.carousel-dots{display:flex;align-items:center;gap:7px}
.carousel-dots button{
  width:28px;height:4px;padding:0;border:0;border-radius:2px;
  background:#fff;opacity:.65;cursor:pointer;
}
.carousel-dots button.is-active{background:var(--blue-2);opacity:1}
.carousel-label{
  padding:7px 10px;border:1px solid rgba(255,255,255,.18);
  background:rgba(3,17,34,.58);color:#fff;
  font-size:10px;font-weight:800;letter-spacing:1.1px;text-transform:uppercase;
}

/* Shared section styles */
.section{padding:88px 0}
.section-dark{background:var(--navy);color:#fff}
.two-column{
  display:grid;
  grid-template-columns:1fr 1.35fr;
  gap:68px;
  align-items:center;
}
.problem{padding:82px 0}
.problem h2,.experience h2{
  margin:0;
  color:#fff;
  font-size:clamp(31px,4vw,47px);
  line-height:1.08;
  letter-spacing:-.9px;
}
.prose-light p{margin:0 0 17px;color:#d5e0ec;font-size:16px}
.highlight{
  margin-top:24px!important;
  padding:16px 0 16px 20px;
  border-left:3px solid var(--blue-2);
  color:#fff!important;
  font-size:19px!important;
  font-weight:900;
}

.section-head{max-width:800px;margin:0 auto 43px;text-align:center}
.section-head h2,.methodology h2{
  margin:0 0 16px;
  color:var(--navy);
  font-size:clamp(30px,4vw,46px);
  line-height:1.08;
  letter-spacing:-.8px;
}
.section-head p:not(.section-kicker),.section-intro{
  margin:0;color:var(--muted);font-size:16px
}

/* Services */
.services{background:#fff}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:19px}
.service-card{
  position:relative;
  min-height:258px;
  padding:28px 26px 25px;
  border:1px solid var(--line);
  background:#fff;
  box-shadow:0 7px 25px rgba(7,26,50,.045);
  overflow:hidden;
  transition:transform .22s,box-shadow .22s,border-color .22s;
}
.service-card::before{
  content:"";position:absolute;left:0;top:0;width:4px;height:0;
  background:var(--blue);transition:height .25s ease
}
.service-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow);
  border-color:#cbd9e8;
}
.service-card:hover::before{height:100%}
.card-number{
  color:var(--blue);font-size:11px;font-weight:900;letter-spacing:1px
}
.service-card h3{
  margin:13px 0 8px;color:var(--navy);font-size:19px;line-height:1.2
}
.service-card p{margin:0 0 13px;color:var(--muted);font-size:13.5px}
.service-card ul{margin:0;padding-left:17px;color:#526174;font-size:13px}
.service-card li{margin:4px 0}

/* Methodology */
.methodology{background:var(--light)}
.methodology-grid{align-items:start}
.steps-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:13px}
.step{
  min-height:145px;padding:21px;
  background:#fff;border:1px solid var(--line)
}
.step span{color:var(--blue);font-size:11px;font-weight:900;letter-spacing:.5px}
.step h3{margin:7px 0 6px;color:var(--navy);font-size:17px}
.step p{margin:0;color:var(--muted);font-size:13.5px}

/* Experience */
.experience{padding:88px 0}
.experience-grid{align-items:center}
.experience p:not(.section-kicker){color:#d4dfeb;font-size:15px}
.timeline{display:flex;flex-wrap:wrap;gap:7px;margin-top:24px}
.timeline span{
  padding:8px 11px;
  border:1px solid rgba(255,255,255,.18);
  color:#e7f0fa;font-size:10px;font-weight:900;letter-spacing:.5px
}
.sector-panel{
  padding:31px;background:var(--navy-2);
  border:1px solid rgba(84,170,255,.23)
}
.sector-panel h2{font-size:25px;margin:0 0 18px}
.sector-list{display:grid;grid-template-columns:1fr 1fr;gap:9px}
.sector-list span{
  padding:11px 12px;
  background:rgba(255,255,255,.055);
  color:#e7f0fa;font-size:12px
}

/* Why HMB */
.why{padding:84px 0}
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.why-grid article{
  padding:27px 21px;
  background:#f8fafc;border-top:3px solid var(--blue)
}
.why-grid h3{margin:0 0 8px;color:var(--navy);font-size:17px}
.why-grid p{margin:0;color:var(--muted);font-size:13.5px}

/* Training */
.training{padding:76px 0;background:#eef4fa}
.training-box{
  display:flex;align-items:center;justify-content:space-between;gap:35px;
  padding:38px 40px;background:#fff;border:1px solid var(--line)
}
.training-box h2{
  margin:0 0 10px;color:var(--navy);font-size:32px;line-height:1.1
}
.training-box p{max-width:740px;margin:0;color:var(--muted);font-size:15px}

/* Contact */
.contact{
  padding:86px 0;
  background:linear-gradient(112deg,#06192f,#0c3157);
  color:#fff;
}
.contact-grid{grid-template-columns:1.4fr .8fr}
.contact h2{
  margin:0 0 15px;
  color:#fff;font-size:clamp(34px,4vw,48px);line-height:1.05
}
.contact p:not(.section-kicker){color:#d4e0ec;font-size:16px}
.contact-info{
  padding-left:27px;border-left:2px solid var(--blue-2)
}
.contact-info div{margin-bottom:19px}
.contact-info strong{
  display:block;margin-bottom:5px;
  color:#76beff;font-size:11px;font-weight:900;
  letter-spacing:1px;text-transform:uppercase
}
.contact-info span,.contact-info a{font-size:17px;color:#fff}
.contact-info a{text-decoration:underline;text-decoration-color:rgba(255,255,255,.35);text-underline-offset:3px}

/* Footer */
.site-footer{padding:29px 0;background:#041326;color:#9fb1c5}
.footer-wrap{display:flex;justify-content:space-between;gap:20px;align-items:center;font-size:11px}
.footer-wrap p{margin:0}
.footer-wrap strong{color:#fff}

/* Tablet */
@media (max-width:1050px){
  .site-nav{gap:16px}
  .header-cta{display:none}
  .two-column{grid-template-columns:1fr;gap:38px}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .why-grid{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr}
}

/* Mobile */
@media (max-width:760px){
  html{scroll-padding-top:72px}
  section{scroll-margin-top:72px}
  .nav-wrap{min-height:72px}
  .brand img{width:175px}
  .menu-toggle{display:block;margin-left:auto}
  .site-nav{
    display:none;position:absolute;left:0;right:0;top:72px;
    padding:8px 5%;background:#fff;
    border-bottom:1px solid var(--line);
    box-shadow:0 12px 22px rgba(7,26,50,.1);
    flex-direction:column;align-items:stretch;gap:0
  }
  .site-nav.is-open{display:flex}
  .site-nav a{padding:12px 0}
  .site-nav a::after{bottom:5px}
  .hero,.hero-content{min-height:670px}
  .hero-overlay{
    background:
      linear-gradient(90deg,rgba(3,17,34,.96),rgba(3,17,34,.70)),
      linear-gradient(0deg,rgba(3,17,34,.7),transparent)
  }
  .hero-copy{padding:55px 0 90px}
  .hero h1{font-size:42px;letter-spacing:-1.2px}
  .hero-lead{font-size:16px}
  .carousel-arrow{width:38px;height:38px;font-size:24px}
  .carousel-prev{left:10px}.carousel-next{right:10px}
  .carousel-controls{bottom:18px;flex-direction:column;gap:7px}
  .carousel-label{display:none}
  .section{padding:70px 0}
  .card-grid,.steps-grid,.why-grid{grid-template-columns:1fr}
  .service-card{min-height:0}
  .training-box{padding:28px;align-items:flex-start;flex-direction:column}
  .footer-wrap{align-items:flex-start;flex-direction:column}
}

/* Respect reduced-motion preferences. */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important}
}

/* Visible keyboard focus for WCAG usability. */
:focus-visible{
  outline:3px solid #67c1ff;
  outline-offset:3px;
}