:root{
  --ink:#2d2d2d;
  --muted:#707070;
  --line:#ded9cf;
  --paper:#fbfaf7;
  --paper-2:#f2efe9;
  --terra:#b9653f;
  --terra-dark:#8f492e;
  --taupe:#aba296;
  --olive:#6c6a4d;
  --charcoal:#252525;
  --white:#ffffff;
  --shadow:0 24px 70px rgba(37,37,37,.12);
  --radius:26px;
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;background:var(--paper);color:var(--ink);line-height:1.6}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.container{width:min(calc(100% - 40px),var(--max));margin-inline:auto}
.skip-link{position:absolute;left:-999px;top:1rem;background:var(--charcoal);color:var(--white);padding:.7rem 1rem;border-radius:999px;z-index:9999}.skip-link:focus{left:1rem}
.site-header{position:sticky;top:0;z-index:100;background:rgba(251,250,247,.88);backdrop-filter:blur(18px);border-bottom:1px solid rgba(222,217,207,.8);transition:box-shadow .25s ease}.site-header.scrolled{box-shadow:0 10px 35px rgba(37,37,37,.08)}
.header-inner{height:76px;display:flex;align-items:center;justify-content:space-between;gap:1rem}.brand{display:flex;align-items:center;gap:.75rem;font-size:.94rem}.brand span{display:flex;flex-direction:column;line-height:1.1}.brand strong{text-transform:uppercase;letter-spacing:.02em}.brand small{font-size:.76rem;color:var(--muted);font-weight:600;margin-top:.2rem}.nav{display:flex;align-items:center;gap:.25rem}.nav a{padding:.7rem .9rem;border-radius:999px;font-weight:700;font-size:.9rem;color:#454545}.nav a:hover{background:var(--paper-2);color:var(--terra)}.nav-cta{background:var(--charcoal)!important;color:var(--white)!important}.nav-toggle{display:none;border:0;background:transparent;padding:.5rem;cursor:pointer}.nav-toggle span{display:block;width:24px;height:2px;background:var(--charcoal);margin:5px 0;border-radius:99px;transition:.2s}
.section-photo{position:relative;overflow:hidden;isolation:isolate;background-image:var(--photo-bg);background-size:cover;background-position:center;background-attachment:fixed}
.section-photo>.container,.section-photo>.hero-bg{position:relative;z-index:2}
.section-photo::before{content:"";position:absolute;inset:0;z-index:0;background:var(--photo-bg) center/cover no-repeat;opacity:.36;filter:saturate(.9) contrast(1.08)}
.section-photo::after{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(135deg,rgba(251,250,247,.66),rgba(251,250,247,.82))}
.section-photo.section-alt::after{background:linear-gradient(135deg,rgba(242,239,233,.64),rgba(242,239,233,.82))}
.section-photo.section-dark::before,.section-photo.cta-section::before{opacity:.40;filter:saturate(.85) contrast(1.14)}
.section-photo.section-dark::after{background:linear-gradient(135deg,rgba(23,23,23,.86),rgba(37,37,37,.76))}
.section-photo.cta-section::after{background:linear-gradient(135deg,rgba(18,18,18,.86),rgba(62,49,41,.74))}
.photo-hero{--photo-bg:url("assets/gallery/estructura-concreto-infraestructura-vial.jpeg")}
.photo-presentacion{--photo-bg:url("assets/gallery/autopista-plaza-cobro.jpeg")}
.photo-services{--photo-bg:url("assets/gallery/obra-civil-autopista-derecho-via.jpeg")}
.photo-capacidad{--photo-bg:url("assets/gallery/supervision-carpeta-asfaltica.jpeg")}
.photo-experiencia{--photo-bg:url("assets/gallery/mantenimiento-pavimentacion.jpeg")}
.photo-method{--photo-bg:url("assets/gallery/topografia-control-geometrico.jpeg")}
.photo-galeria{--photo-bg:url("assets/gallery/terracerias-maquinaria.jpeg")}
.photo-contact{--photo-bg:url("assets/gallery/excavacion-drenaje-obras-complementarias.jpeg")}
@supports (-webkit-touch-callout:none){.section-photo{background-attachment:scroll}}
.hero{position:relative;overflow:hidden;padding:86px 0 70px;background:radial-gradient(circle at 15% 10%,rgba(185,101,63,.16),transparent 32%),linear-gradient(135deg,#fff 0%,#f4f0e8 100%)}.hero-bg{position:absolute;inset:auto -160px -260px auto;width:540px;height:540px;background:linear-gradient(45deg,var(--terra),var(--olive));border-radius:45% 55% 70% 30%;opacity:.16;filter:blur(4px)}.hero-grid{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:64px;align-items:center}.eyebrow{margin:0 0 .8rem;color:var(--terra);text-transform:uppercase;letter-spacing:.12em;font-weight:900;font-size:.78rem}.hero h1,.section-heading h2,.cta-section h2{font-size:clamp(2.2rem,5vw,5rem);line-height:.98;margin:0;color:var(--charcoal);letter-spacing:-.055em}.section-heading h2,.cta-section h2{font-size:clamp(2rem,3.3vw,3.8rem)}.hero-text{font-size:1.2rem;color:#4c4c4c;max-width:680px;margin:1.45rem 0 0}.hero-actions{display:flex;gap:.9rem;flex-wrap:wrap;margin-top:2rem}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;min-height:48px;padding:.85rem 1.25rem;border-radius:999px;font-weight:900;border:1px solid transparent;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,background .2s ease}.btn:hover{transform:translateY(-2px)}.btn-primary{background:var(--terra);color:var(--white);box-shadow:0 16px 35px rgba(185,101,63,.22)}.btn-primary:hover{background:var(--terra-dark)}.btn-secondary{background:rgba(255,255,255,.8);border-color:var(--line);color:var(--charcoal)}.hero-card{background:rgba(255,255,255,.78);border:1px solid rgba(222,217,207,.9);border-radius:var(--radius);padding:2rem;box-shadow:var(--shadow)}.hero-card img{width:min(310px,100%);margin:auto;border-radius:18px}.hero-card-footer{border-top:1px solid var(--line);margin-top:1.4rem;padding-top:1.1rem;display:flex;flex-direction:column;gap:.25rem;color:var(--muted);font-size:.9rem}.hero-card-footer strong{color:var(--charcoal)}
.strip{padding:24px 0;background:var(--charcoal);color:var(--white)}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem}.stat-card{padding:1.25rem;border:1px solid rgba(255,255,255,.1);border-radius:20px;background:rgba(255,255,255,.04)}.stat-card strong{display:block;font-size:2.2rem;line-height:1;color:#fff}.stat-card span{display:block;margin-top:.55rem;color:rgba(255,255,255,.72);font-weight:650;font-size:.92rem}
.section{padding:92px 0}.section-alt{background:var(--paper-2)}.two-col{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;align-items:start}.copy-block p,.section-heading p{color:#555;font-size:1.04rem}.centered{text-align:center;max-width:840px;margin-inline:auto}.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-top:2.5rem}.service-card{position:relative;padding:1.5rem;border:1px solid var(--line);border-radius:22px;background:var(--white);box-shadow:0 12px 35px rgba(37,37,37,.05);min-height:245px}.service-card span{display:inline-flex;width:42px;height:42px;border-radius:14px;background:#f3e0d6;color:var(--terra);align-items:center;justify-content:center;font-weight:900;margin-bottom:1.2rem}.service-card h3{font-size:1.2rem;margin:0 0 .6rem;color:var(--charcoal)}.service-card p{margin:0;color:#5b5b5b}.capability-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.capability-grid div{background:var(--white);border:1px solid var(--line);border-radius:20px;padding:1.25rem}.capability-grid div:first-child{grid-column:1 / -1;background:var(--charcoal);color:var(--white)}.capability-grid strong{display:block;font-size:1.05rem;color:inherit}.capability-grid span{display:block;margin-top:.45rem;color:inherit;opacity:.72}.section-dark{background:linear-gradient(135deg,#282828 0%,#171717 100%);color:var(--white)}.section-dark .section-heading h2,.section-dark .section-heading p{color:var(--white)}.section-dark .section-heading p{opacity:.74}.filters{display:flex;gap:.7rem;justify-content:center;flex-wrap:wrap;margin:2rem 0}.filter{border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.08);color:rgba(255,255,255,.78);border-radius:999px;padding:.75rem 1rem;font-weight:900;cursor:pointer}.filter.active,.filter:hover{background:var(--terra);color:var(--white);border-color:var(--terra)}.projects-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}.project-card{display:flex;flex-direction:column;gap:1rem;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:22px;padding:1.35rem;min-height:360px;transition:opacity .2s ease,transform .2s ease}.project-card.hidden{display:none}.project-card:hover{transform:translateY(-4px);background:rgba(255,255,255,.09)}.project-card span{color:#e7b39c;text-transform:uppercase;font-size:.72rem;letter-spacing:.1em;font-weight:900}.project-card h3{margin:0;font-size:1.2rem;line-height:1.2;color:#fff}.project-card p{margin:0;color:rgba(255,255,255,.7)}.project-card dl{margin:auto 0 0;display:grid;gap:.65rem;border-top:1px solid rgba(255,255,255,.12);padding-top:1rem}.project-card dl div{display:flex;justify-content:space-between;gap:1rem}.project-card dt{color:rgba(255,255,255,.5);font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;font-weight:900}.project-card dd{margin:0;text-align:right;color:#fff;font-weight:700}
.timeline{max-width:920px;margin:2.5rem auto 0;display:grid;gap:1rem}.timeline-item{display:grid;grid-template-columns:70px 1fr;gap:1rem;align-items:start;background:var(--white);border:1px solid var(--line);border-radius:22px;padding:1.2rem;box-shadow:0 12px 40px rgba(37,37,37,.05)}.timeline-item>span{width:52px;height:52px;border-radius:18px;background:var(--terra);color:#fff;display:grid;place-items:center;font-size:1.4rem;font-weight:900}.timeline-item h3{margin:.1rem 0 .4rem}.timeline-item p{margin:0;color:#5a5a5a}.gallery-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-top:2.4rem}.gallery-item{margin:0;background:var(--white);border:1px solid var(--line);border-radius:22px;overflow:hidden;box-shadow:0 12px 35px rgba(37,37,37,.05)}.gallery-item img{width:100%;height:230px;object-fit:cover;background:#fff}.gallery-item figcaption{padding:1rem;color:#555;font-weight:700;font-size:.94rem}.cta-section{padding:96px 0;background:linear-gradient(135deg,var(--charcoal),#37332f);color:var(--white)}.cta-grid{display:grid;grid-template-columns:1fr .85fr;gap:48px;align-items:start}.cta-section p{color:rgba(255,255,255,.74);font-size:1.05rem}.contact-list{display:grid;gap:.7rem;margin-top:1.5rem}.contact-list a{width:max-content;color:#fff;font-weight:900;border-bottom:2px solid rgba(185,101,63,.8)}.contact-form{display:grid;gap:1rem;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.13);border-radius:26px;padding:1.4rem}.contact-form label{display:grid;gap:.4rem;font-weight:850;color:rgba(255,255,255,.85)}.contact-form input,.contact-form textarea{width:100%;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.95);border-radius:14px;padding:.9rem 1rem;font:inherit;color:var(--ink);outline:none}.contact-form input:focus,.contact-form textarea:focus{border-color:var(--terra);box-shadow:0 0 0 4px rgba(185,101,63,.22)}.hidden{display:none}.footer{padding:28px 0;background:#111;color:rgba(255,255,255,.75)}.footer-inner{display:flex;justify-content:space-between;gap:1rem;align-items:center}.footer-inner div{display:flex;flex-direction:column}.footer strong{color:#fff}.footer p{margin:0;font-size:.9rem}.reveal{opacity:0;transform:translateY(16px);transition:opacity .55s ease,transform .55s ease}.reveal.visible{opacity:1;transform:none}
@media (max-width:980px){.hero-grid,.two-col,.cta-grid{grid-template-columns:1fr}.hero{padding-top:58px}.reverse-mobile .section-heading{order:-1}.services-grid,.projects-grid,.gallery-grid{grid-template-columns:repeat(2,1fr)}.stats-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:760px){.header-inner{height:68px}.brand small{display:none}.nav-toggle{display:block}.nav{position:absolute;top:68px;left:20px;right:20px;display:none;flex-direction:column;align-items:stretch;background:var(--white);border:1px solid var(--line);border-radius:20px;padding:.6rem;box-shadow:var(--shadow)}.nav.open{display:flex}.nav a{text-align:center}.hero-actions{flex-direction:column}.btn{width:100%}.stats-grid,.services-grid,.projects-grid,.gallery-grid,.capability-grid{grid-template-columns:1fr}.section{padding:68px 0}.project-card{min-height:unset}.gallery-item img{height:220px}.footer-inner{align-items:flex-start;flex-direction:column}.hero h1{font-size:clamp(2.35rem,13vw,4rem)}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.reveal,.btn,.project-card{transition:none}.reveal{opacity:1;transform:none}.btn:hover,.project-card:hover{transform:none}}

.section-photo .service-card,
.section-photo .timeline-item,
.section-photo .gallery-item,
.section-photo .capability-grid div,
.section-photo .hero-card{
  background:rgba(255,255,255,.88);
  backdrop-filter:blur(6px);
}
.section-photo.section-dark .project-card{
  background:rgba(255,255,255,.085);
  backdrop-filter:blur(4px);
}
.section-photo.section-dark .project-card:hover{
  background:rgba(255,255,255,.13);
}