:root{
    --concrete: #F0F0EE;
    --concrete-dark: #E2E1DC;
    --charcoal: #24262A;
    --charcoal-soft: #5B5F5C;
    --steel: #7B7F7C;
    --corten: #DB6A22;
    --safety: #DB6A22;
    --white: #FFFFFF;
    --line: rgba(36,38,42,0.14);
    --line-light: rgba(240,240,238,0.16);
  }

  *{ box-sizing:border-box; margin:0; padding:0; }
  html{ scroll-behavior:smooth; }
  body{
    background:var(--concrete);
    color:var(--charcoal);
    font-family:'Inter', sans-serif;
    line-height:1.5;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;}

  h1,h2,h3{
    font-family:'Sora', sans-serif;
    font-weight:700;
    letter-spacing:-0.01em;
    line-height:1.1;
  }
  .mono{ font-family:'JetBrains Mono', monospace; }
  a{color:inherit;text-decoration:none;}
  :focus-visible{outline:3px solid var(--corten); outline-offset:3px;}
  .wrap{ max-width:1180px; margin:0 auto; padding:0 32px; }
  ul{list-style:none;}

  /* ---------- NAV ---------- */
  header.site{
    position:sticky; top:0; z-index:50;
    background:rgba(237,235,228,0.94);
    backdrop-filter:blur(6px);
    border-bottom:1px solid var(--line);
  }
  .nav{
    display:flex; align-items:center; justify-content:space-between;
    padding:14px 32px;
    max-width:1180px; margin:0 auto;
  }
  .nav .brand{ display:flex; align-items:center; }
  .brand-logo{ height:42px; width:auto; }
  @media (max-width:480px){ .brand-logo{ height:36px; } }
  .nav ul.links{ display:flex; gap:30px; }
  .nav ul.links li a{
    font-size:0.9rem; font-weight:500; letter-spacing:0.01em;
    position:relative; padding-bottom:4px;
  }
  .nav ul.links li a::after{
    content:""; position:absolute; left:0; bottom:0;
    width:0; height:2px; background:var(--corten);
    transition:width .25s ease;
  }
  .nav ul.links li a:hover::after{width:100%;}
  .nav-cta{
    display:inline-block; background:var(--charcoal); color:var(--concrete) !important;
    padding:10px 18px; font-size:0.85rem; font-weight:600; border-radius:2px;
  }
  .nav-toggle{display:none;}

  @media (max-width:820px){
    .nav ul.links{
      position:fixed; inset:60px 0 0 0; background:var(--concrete);
      flex-direction:column; padding:32px; gap:22px;
      transform:translateX(100%); transition:transform .3s ease;
    }
    .nav ul.links.open{transform:translateX(0);}
    .nav-toggle{ display:block; background:none; border:none; font-size:1.5rem; cursor:pointer; color:var(--charcoal); }
  }

  /* ---------- HERO ---------- */
  .hero{ position:relative; background:var(--charcoal); color:var(--concrete); overflow:hidden; padding:88px 0 80px; }
  .hero::before{
    content:""; position:absolute; inset:0;
    background-image:
      linear-gradient(var(--line-light) 1px, transparent 1px),
      linear-gradient(90deg, var(--line-light) 1px, transparent 1px);
    background-size:48px 48px; opacity:0.5; pointer-events:none;
  }
  .hero-grid{ position:relative; display:grid; grid-template-columns:1.1fr 0.9fr; gap:48px; align-items:center; }
  .eyebrow{
    font-family:'JetBrains Mono', monospace; font-size:0.76rem; letter-spacing:0.12em;
    color:var(--safety); text-transform:uppercase; margin-bottom:16px;
    display:flex; align-items:center; gap:10px;
  }
  .eyebrow::before{ content:""; width:22px; height:1px; background:var(--safety); display:inline-block; }
  .hero h1{ font-size:clamp(2.3rem, 5.2vw, 3.9rem); color:var(--white); }
  .hero h1 .accent{color:var(--corten);}
  .hero p.lede{ margin-top:20px; max-width:480px; font-size:1.05rem; color:rgba(237,235,228,0.82); }
  .hero-actions{ margin-top:30px; display:flex; gap:16px; flex-wrap:wrap; }
  .btn{ display:inline-block; padding:14px 26px; font-weight:600; font-size:0.92rem; border-radius:2px; transition:transform .2s ease, background .2s ease; }
  .btn-primary{ background:var(--corten); color:var(--white); }
  .btn-primary:hover{ background:#853f26; transform:translateY(-2px); }
  .btn-ghost{ border:1px solid rgba(237,235,228,0.4); color:var(--concrete); }
  .btn-ghost:hover{ border-color:var(--concrete); transform:translateY(-2px); }

  .hero-badges{ margin-top:34px; display:flex; gap:24px; flex-wrap:wrap; }
  .hero-badges .b{ font-family:'JetBrains Mono', monospace; font-size:0.78rem; color:rgba(237,235,228,0.6); }
  .hero-badges .b strong{ display:block; font-size:1.5rem; color:var(--white); font-family:'Sora', sans-serif; font-weight:700; }

  /* modular assembly signature */
  .assembly{ position:relative; height:340px; display:flex; align-items:flex-end; justify-content:center; gap:9px; }
  .assembly .module{
    width:48px; background:linear-gradient(180deg, var(--steel), #4c4f4c);
    border:1px solid rgba(237,235,228,0.25); border-radius:2px;
    opacity:0; transform:translateY(-40px);
    animation:drop 0.7s cubic-bezier(.2,.9,.3,1) forwards; position:relative;
  }
  .assembly .module::after{
    content:attr(data-code); position:absolute; bottom:6px; left:0; right:0; text-align:center;
    font-family:'JetBrains Mono', monospace; font-size:0.6rem; color:rgba(237,235,228,0.55);
  }
  .assembly .module.corten{background:linear-gradient(180deg, var(--corten), #6f3a22);}
  .assembly .module.safety{background:linear-gradient(180deg, var(--safety), #b57b23);}
  @keyframes drop{ to{ opacity:1; transform:translateY(0); } }
  @media (prefers-reduced-motion: reduce){ .assembly .module{animation:none; opacity:1; transform:none;} }
  @media (max-width:900px){ .hero-grid{grid-template-columns:1fr;} .assembly{height:200px; margin-top:10px;} }

  /* ---------- SECTION HEADERS ---------- */
  .section{ padding:88px 0; }
  .section-head{ max-width:660px; margin-bottom:52px; }
  .section-head .eyebrow{ color:var(--corten); }
  .section-head .eyebrow::before{ background:var(--corten); }
  .section-head h2{ font-size:clamp(1.9rem, 3.8vw, 2.7rem); }
  .section-head p{ margin-top:14px; color:var(--charcoal-soft); font-size:1.02rem; max-width:580px; }

  /* ---------- QUIENES SOMOS ---------- */
  .about{ display:grid; grid-template-columns:1.15fr 0.85fr; gap:60px; align-items:start; }
  .about p{ color:var(--charcoal-soft); font-size:1.02rem; max-width:520px; }
  .about p + p{ margin-top:14px; }
  .seal{
    margin-top:20px; display:inline-flex; align-items:center; gap:10px;
    border:1px solid var(--corten); color:var(--corten); padding:8px 14px; border-radius:2px;
    font-family:'JetBrains Mono', monospace; font-size:0.76rem; letter-spacing:0.03em;
  }
  .stats{ display:grid; grid-template-columns:1fr 1fr; gap:1px; background:var(--line); border:1px solid var(--line); }
  .stat{ background:var(--concrete); padding:24px 20px; }
  .stat .num{ font-family:'JetBrains Mono', monospace; font-size:2rem; font-weight:500; color:var(--corten); }
  .stat .label{ margin-top:6px; font-size:0.8rem; color:var(--charcoal-soft); letter-spacing:0.01em; }
  @media (max-width:900px){ .about{grid-template-columns:1fr;} }

  /* ---------- TRAYECTORIA / CHART ---------- */
  .trayectoria{ background:var(--concrete-dark); }
  .chart-card{ background:var(--white); border:1px solid var(--line); padding:34px 34px 24px; }
  .chart-card h3{ font-size:1.2rem; text-transform:none; letter-spacing:0; margin-bottom:4px; }
  .chart-card .sub{ font-size:0.88rem; color:var(--charcoal-soft); margin-bottom:18px; }
  .chart-legend{ display:flex; gap:22px; margin-top:14px; flex-wrap:wrap; }
  .chart-legend span{ font-family:'JetBrains Mono', monospace; font-size:0.76rem; color:var(--charcoal-soft); display:flex; align-items:center; gap:7px; }
  .chart-legend i{ width:10px; height:10px; display:inline-block; border-radius:1px; }
  .chart-totals{ display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line); margin-top:26px; }
  .chart-totals .t{ background:var(--white); padding:20px; }
  .chart-totals .t .num{ font-family:'JetBrains Mono', monospace; font-size:1.5rem; color:var(--corten); font-weight:500; }
  .chart-totals .t .label{ font-size:0.76rem; color:var(--charcoal-soft); margin-top:4px; }
  @media (max-width:700px){ .chart-totals{grid-template-columns:1fr;} }

  /* ---------- PROCESO ---------- */
  .steps{ display:grid; grid-template-columns:repeat(4, 1fr); gap:2px; background:var(--line); border:1px solid var(--line); }
  .step{ background:var(--white); padding:30px 24px 34px; position:relative; }
  .step .idx{ font-family:'JetBrains Mono', monospace; font-size:0.85rem; color:var(--corten); display:block; margin-bottom:16px; }
  .step h3{ font-size:1.25rem; margin-bottom:10px; }
  .step p{ font-size:0.9rem; color:var(--charcoal-soft); }
  @media (max-width:900px){ .steps{grid-template-columns:1fr 1fr;} }
  @media (max-width:560px){ .steps{grid-template-columns:1fr;} }

  /* ---------- SERVICIOS ---------- */
  .services-grid{ display:grid; grid-template-columns:repeat(2, 1fr); gap:22px; }
  .service-card{ background:var(--white); border:1px solid var(--line); padding:28px; transition:transform .2s ease, box-shadow .2s ease; }
  .service-card:hover{ transform:translateY(-4px); box-shadow:0 12px 28px rgba(29,33,31,0.08); }
  .service-card .tag{
    font-family:'JetBrains Mono', monospace; font-size:0.7rem; letter-spacing:0.07em; text-transform:uppercase;
    color:var(--steel); display:inline-block; margin-bottom:12px; padding:4px 10px; border:1px solid var(--steel); border-radius:2px;
  }
  .service-card h3{ font-size:1.3rem; margin-bottom:10px; }
  .service-card p{ color:var(--charcoal-soft); font-size:0.94rem; }
  @media (max-width:760px){ .services-grid{grid-template-columns:1fr;} }

  /* ---------- CLIENTES ---------- */
  .clients{ background:var(--charcoal); color:var(--concrete); }
  .clients .section-head .eyebrow{ color:var(--safety); }
  .clients .section-head .eyebrow::before{ background:var(--safety); }
  .clients .section-head p{ color:rgba(237,235,228,0.72); }
  .logo-wall{ display:flex; flex-wrap:wrap; gap:14px 18px; }
  .logo-wall span{
    font-family:'Sora', sans-serif; font-weight:600; font-size:1.05rem;
    color:var(--concrete); border:1px solid rgba(240,240,238,0.25);
    padding:14px 22px; border-radius:2px; letter-spacing:-0.005em;
  }
  @media (max-width:600px){ .logo-wall span{ font-size:0.92rem; padding:12px 16px; } }

  /* ---------- PROYECTOS ---------- */
  .filters{ display:flex; gap:10px; margin-bottom:36px; flex-wrap:wrap; }
  .filter-btn{
    font-family:'JetBrains Mono', monospace; font-size:0.78rem; letter-spacing:0.03em;
    padding:9px 16px; border:1px solid var(--line); background:transparent; color:var(--charcoal-soft);
    cursor:pointer; border-radius:2px; transition:all .2s ease;
  }
  .filter-btn:hover{ border-color:var(--corten); color:var(--corten); }
  .filter-btn.active{ background:var(--charcoal); color:var(--concrete); border-color:var(--charcoal); }
  .projects-grid{ display:grid; grid-template-columns:repeat(3, 1fr); gap:22px; }
  .project-card{ background:var(--white); border:1px solid var(--line); overflow:hidden; transition:transform .2s ease, box-shadow .2s ease; }
  .project-card:hover{ transform:translateY(-4px); box-shadow:0 14px 30px rgba(29,33,31,0.1); }
  .project-photo{ aspect-ratio:4/3; overflow:hidden; background:var(--concrete-dark); }
  .project-photo img{ width:100%; height:100%; object-fit:cover; }
  .project-body{ padding:18px 20px 22px; }
  .project-body .tag{
    font-family:'JetBrains Mono', monospace; font-size:0.66rem; letter-spacing:0.06em; text-transform:uppercase;
    color:var(--steel); display:inline-block; margin-bottom:8px;
  }
  .project-body h3{ font-size:1.15rem; text-transform:none; letter-spacing:0; font-weight:700; line-height:1.15; }
  .project-body .loc{ font-size:0.84rem; color:var(--charcoal-soft); margin-top:4px; }
  @media (max-width:960px){ .projects-grid{grid-template-columns:1fr 1fr;} }
  @media (max-width:600px){ .projects-grid{grid-template-columns:1fr;} }

  /* ---------- CONTACTO ---------- */
  .contact{ background:var(--charcoal); color:var(--concrete); }
  .contact .section-head p{ color:rgba(237,235,228,0.72); }
  .contact .section-head .eyebrow{ color:var(--safety); }
  .contact .section-head .eyebrow::before{ background:var(--safety); }
  .contact-grid{ display:grid; grid-template-columns:0.9fr 1.1fr; gap:56px; }
  .contact-info dl{ display:grid; gap:20px; }
  .contact-info dt{ font-family:'JetBrains Mono', monospace; font-size:0.74rem; color:var(--safety); letter-spacing:0.08em; text-transform:uppercase; margin-bottom:4px; }
  .contact-info dd{ font-size:1.02rem; }
  .contact-info dd a:hover{ color:var(--corten); }
  form{ display:grid; gap:16px; }
  .field{ display:flex; flex-direction:column; gap:6px; }
  .field label{ font-size:0.8rem; color:rgba(237,235,228,0.7); }
  .field input, .field textarea, .field select{
    background:transparent; border:none; border-bottom:1px solid rgba(237,235,228,0.35);
    padding:10px 2px; color:var(--concrete); font-family:'Inter', sans-serif; font-size:1rem;
  }
  .field select option{ color:var(--charcoal); }
  .field input::placeholder, .field textarea::placeholder{ color:rgba(237,235,228,0.35); }
  .field input:focus, .field textarea:focus, .field select:focus{ outline:none; border-color:var(--corten); }
  textarea{ resize:vertical; min-height:88px; }
  form .btn-primary{ justify-self:start; border:none; cursor:pointer; margin-top:6px; }
  .form-note{ font-size:0.78rem; color:rgba(237,235,228,0.5); margin-top:-4px; }
  @media (max-width:900px){ .contact-grid{grid-template-columns:1fr;} }

  /* ---------- FOOTER ---------- */
  footer{ background:var(--charcoal); border-top:1px solid var(--line-light); padding:24px 0; }
  footer .wrap{ display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:12px; }
  footer p{ font-size:0.78rem; color:rgba(237,235,228,0.5); }