:root{
    --ink:#12181D;
    --ink-soft:#1B232B;
    --paper:#F5F6F4;
    --paper-panel:#FFFFFF;
    --blueprint:#1E4D7B;
    --blueprint-light:#DCE7F0;
    --steel:#5C6670;
    --steel-light:#8A939B;
    --amber:#D98F2B;
    --line:#D6D9D6;
    --line-dark:rgba(255,255,255,.14);
    --mark:#1E4D7B;
    --mark-dark:#4E86BB;
    --radius:2px;
    --maxw:1180px;
  }
  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:'IBM Plex Sans', sans-serif;
    font-size:16px;
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4{
    font-family:'Space Grotesk', sans-serif;
    margin:0;
    letter-spacing:-0.01em;
  }
  p{margin:0;}
  a{color:inherit;text-decoration:none;}
  ul{margin:0;padding:0;list-style:none;}
  img{max-width:100%;display:block;}
  .mono{font-family:'IBM Plex Mono', monospace;}
  .eyebrow{
    font-family:'IBM Plex Mono', monospace;
    font-size:12.5px;
    letter-spacing:.12em;
    text-transform:uppercase;
    color:var(--blueprint);
    display:flex;
    align-items:center;
    gap:.6em;
    margin-bottom:14px;
  }
  .eyebrow::before{content:"";width:7px;height:7px;background:var(--amber);display:inline-block;border-radius:1px;}
  section[data-bg="dark"] .eyebrow{color:var(--mark-dark);}
  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px;}
  section{padding:96px 0;position:relative;scroll-margin-top:68px;}
  section[data-bg="dark"]{background:var(--ink);color:#F2F3F1;}
  section[data-bg="dark"] .steel-text{color:#AEB6BD;}
  .steel-text{color:var(--steel);}

  /* Header / Nav */
  header{
    position:fixed;top:0;left:0;right:0;z-index:100;
    background:rgba(245,246,244,.88);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
  }
  .nav-inner{max-width:var(--maxw);margin:0 auto;padding:0 28px;display:flex;align-items:center;justify-content:space-between;height:68px;}
  .brand{font-family:'Space Grotesk';font-weight:700;font-size:19px;letter-spacing:-.01em;}
  .brand em{font-style:normal;color:var(--blueprint);}
  nav.links{display:flex;gap:30px;}
  nav.links a{font-size:14.5px;font-weight:500;color:var(--ink);position:relative;padding:4px 0;}
  nav.links a:hover{color:var(--blueprint);}
  .lang-switch{display:flex;gap:2px;border:1px solid var(--line);border-radius:3px;overflow:hidden;}
  .lang-switch button{
    font-family:'IBM Plex Mono';font-size:12px;font-weight:500;letter-spacing:.04em;
    padding:7px 11px;background:transparent;border:none;cursor:pointer;color:var(--steel);
  }
  .lang-switch button.active{background:var(--blueprint);color:#fff;}
  .nav-right{display:flex;align-items:center;gap:22px;}
  .burger{display:none;flex-direction:column;gap:4px;background:none;border:none;cursor:pointer;padding:6px;}
  .burger span{width:22px;height:2px;background:var(--ink);}

  /* Hero */
  .hero{
    padding-top:168px;padding-bottom:96px;
    background:
      linear-gradient(var(--paper),var(--paper)),
      repeating-linear-gradient(0deg, rgba(30,77,123,.055) 0 1px, transparent 1px 42px),
      repeating-linear-gradient(90deg, rgba(30,77,123,.055) 0 1px, transparent 1px 42px);
  }
  .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:end;}
  .hero h1{font-size:56px;line-height:1.06;font-weight:700;max-width:16ch;}
  .hero h1 .accent{color:var(--blueprint);}
  .hero-sub{margin-top:26px;font-size:18px;max-width:46ch;color:var(--steel);}
  .hero-actions{margin-top:36px;display:flex;gap:16px;align-items:center;flex-wrap:wrap;}
  .btn{
    display:inline-flex;align-items:center;gap:10px;
    background:var(--ink);color:#fff;
    font-weight:500;font-size:14.5px;
    padding:14px 24px;border-radius:2px;border:1px solid var(--ink);
    transition:.2s;
  }
  .btn:hover{background:var(--blueprint);border-color:var(--blueprint);}
  .btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line);}
  .btn.ghost:hover{border-color:var(--blueprint);color:var(--blueprint);}
  .coord-plate{
    justify-self:end;
    border:1px solid var(--line);
    background:var(--paper-panel);
    padding:22px 24px;
    max-width:290px;
  }
  .coord-plate .mono{font-size:13px;color:var(--blueprint);letter-spacing:.03em;}
  .coord-plate .cline{display:flex;justify-content:space-between;padding:7px 0;border-top:1px solid var(--line);font-size:13px;}
  .coord-plate .cline:first-of-type{border-top:none;}
  .coord-plate .cline span:first-child{color:var(--steel-light);}

  /* Panels / cards with registration corner marks (signature motif) */
  .panel{
    position:relative;
    background-color:var(--paper-panel);
    padding:30px 26px;
    background-repeat:no-repeat;
    background-image:
      linear-gradient(to right, var(--mark) 2px, transparent 2px),
      linear-gradient(to bottom, var(--mark) 2px, transparent 2px),
      linear-gradient(to left, var(--mark) 2px, transparent 2px),
      linear-gradient(to bottom, var(--mark) 2px, transparent 2px),
      linear-gradient(to right, var(--mark) 2px, transparent 2px),
      linear-gradient(to top, var(--mark) 2px, transparent 2px),
      linear-gradient(to left, var(--mark) 2px, transparent 2px),
      linear-gradient(to top, var(--mark) 2px, transparent 2px);
    background-size:16px 2px, 2px 16px, 16px 2px, 2px 16px, 16px 2px, 2px 16px, 16px 2px, 2px 16px;
    background-position: top left, top left, top right, top right, bottom right, bottom right, bottom left, bottom left;
  }
  section[data-bg="dark"] .panel{background-color:var(--ink-soft);--mark:var(--mark-dark);}
  .panel-num{font-family:'IBM Plex Mono';font-size:13px;color:var(--amber);margin-bottom:10px;display:block;}
  .panel h3{font-size:19px;margin-bottom:10px;}
  .panel p{font-size:14.5px;color:var(--steel);}
  section[data-bg="dark"] .panel p{color:#AEB6BD;}
  .panel ul{margin-top:12px;}
  .panel li{font-size:14px;color:var(--steel);padding:5px 0 5px 16px;position:relative;}
  section[data-bg="dark"] .panel li{color:#AEB6BD;}
  .panel li::before{content:"";position:absolute;left:0;top:13px;width:6px;height:1px;background:var(--blueprint);}
  section[data-bg="dark"] .panel li::before{background:var(--mark-dark);}

  .section-head{max-width:640px;margin-bottom:52px;}
  .section-head h2{font-size:38px;font-weight:600;}
  .section-head .lede{margin-top:14px;font-size:16.5px;color:var(--steel);}
  section[data-bg="dark"] .section-head .lede{color:#AEB6BD;}

  .grid{display:grid;gap:22px;}
  .g2{grid-template-columns:repeat(2,1fr);}
  .g3{grid-template-columns:repeat(3,1fr);}
  .g4{grid-template-columns:repeat(4,1fr);}

  /* Stats strip */
  .stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-top:64px;}
  .stat{padding:26px 20px;border-left:1px solid var(--line);}
  .stat:first-child{border-left:none;}
  .stat .num{font-family:'Space Grotesk';font-size:34px;font-weight:700;color:var(--blueprint);}
  .stat .label{font-size:13px;color:var(--steel);margin-top:4px;}

  /* Quote block (solar) */
  .quote-block{
    background:var(--ink);color:#fff;padding:52px 46px;position:relative;
    background-image: repeating-linear-gradient(0deg, rgba(255,255,255,.045) 0 1px, transparent 1px 40px), repeating-linear-gradient(90deg, rgba(255,255,255,.045) 0 1px, transparent 1px 40px);
  }
  .quote-block .qmark{font-family:'Space Grotesk';font-size:52px;color:var(--amber);line-height:1;display:block;margin-bottom:6px;}
  .quote-block h3{font-size:28px;font-weight:600;max-width:22ch;}
  .quote-block p{margin-top:16px;color:#C9CFD3;max-width:52ch;font-size:15.5px;}

  /* Table */
  table{width:100%;border-collapse:collapse;font-size:14.5px;}
  th,td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line);}
  th{font-family:'IBM Plex Mono';font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--blueprint);font-weight:500;}
  td.hi{color:var(--blueprint);font-weight:500;}
  .table-wrap{overflow-x:auto;background:var(--paper-panel);border:1px solid var(--line);}
  .table-wrap table{min-width:600px;}

  /* Packages */
  .pkg{position:relative;display:flex;flex-direction:column;}
  .pkg.rec{outline:1.5px solid var(--blueprint);}
  .pkg .rec-tag{position:absolute;top:-11px;left:26px;background:var(--amber);color:#fff;font-family:'IBM Plex Mono';font-size:10.5px;letter-spacing:.08em;padding:3px 9px;}
  .pkg .price{font-family:'Space Grotesk';font-size:24px;font-weight:700;color:var(--ink);margin:10px 0 4px;}
  .pkg .range{font-size:13px;color:var(--steel-light);}
  .pkg ul{margin-top:16px;flex:1;}

  /* Process steps */
  .process{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;position:relative;}
  .pstep{padding-top:18px;border-top:2px solid var(--blueprint);}
  section[data-bg="dark"] .pstep{border-top-color:var(--mark-dark);}
  .pstep .pnum{font-family:'IBM Plex Mono';font-size:12px;color:var(--amber);}
  .pstep h4{font-size:15.5px;margin:8px 0 6px;}
  .pstep p{font-size:13.5px;color:var(--steel);}
  section[data-bg="dark"] .pstep p{color:#AEB6BD;}

  /* FAQ */
  .faq-item{border-top:1px solid var(--line);padding:22px 0;}
  .faq-item:last-child{border-bottom:1px solid var(--line);}
  .faq-item h4{font-size:16px;margin-bottom:8px;display:flex;gap:10px;}
  .faq-item h4 .q{color:var(--amber);font-family:'IBM Plex Mono';font-size:14px;}
  .faq-item p{font-size:14.5px;color:var(--steel);max-width:60ch;}

  /* Companies */
  .company-card{display:flex;flex-direction:column;height:100%;}
  .company-card .ctag{font-family:'IBM Plex Mono';font-size:12px;color:var(--amber);margin-bottom:8px;}
  .company-card h3{font-size:21px;}
  .company-card .role{font-size:13.5px;color:var(--blueprint);margin:6px 0 14px;font-weight:500;}
  .company-card p{font-size:14.5px;color:var(--steel);flex:1;}

  /* Contact */
  .contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;}
  .contact-line{display:flex;justify-content:space-between;padding:16px 0;border-top:1px solid var(--line-dark);font-size:15px;}
  .contact-line:first-child{border-top:none;}
  .contact-line span:first-child{color:#8A939B;}

  footer{background:var(--ink);color:#8A939B;padding:52px 0 28px;font-size:13.5px;}
  .footer-top{display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:24px;padding-bottom:30px;border-bottom:1px solid var(--line-dark);margin-bottom:22px;}
  .footer-brand{font-family:'Space Grotesk';font-size:18px;font-weight:700;color:#fff;}
  .footer-cols{display:flex;gap:56px;}
  .footer-cols h5{font-family:'IBM Plex Mono';font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:#5C6670;margin-bottom:10px;}
  .footer-cols li{padding:4px 0;}
  .footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;}

  @media (max-width: 900px){
    nav.links{display:none;}
    .burger{display:flex;}
    .hero-grid{grid-template-columns:1fr;}
    .coord-plate{justify-self:start;max-width:100%;}
    .hero h1{font-size:38px;}
    .g2,.g3,.g4{grid-template-columns:1fr;}
    .stats{grid-template-columns:repeat(2,1fr);}
    .stat:nth-child(3){border-left:none;}
    .process{grid-template-columns:repeat(2,1fr);}
    section{padding:64px 0;}
    .contact-grid{grid-template-columns:1fr;}
  }

  nav.links.open{
    display:flex;position:fixed;top:68px;left:0;right:0;background:var(--paper);
    flex-direction:column;padding:10px 28px 26px;border-bottom:1px solid var(--line);gap:4px;
  }
  nav.links.open a{padding:12px 0;border-top:1px solid var(--line);}
  nav.links.open a:first-child{border-top:none;}

/* ---------- Construction Projects gallery ---------- */
.project-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
}
.project-card{
  position:relative;
  cursor:pointer;
  overflow:hidden;
  background:var(--ink);
  aspect-ratio:4/3;
}
.project-card:first-child{
  grid-column:span 2;
  grid-row:span 2;
  aspect-ratio:auto;
}
.project-card img{
  width:100%;height:100%;object-fit:cover;
  display:block;
  transition:transform .5s ease;
}
.project-card:hover img{transform:scale(1.06);}
.project-card .pc-overlay{
  position:absolute;left:0;right:0;bottom:0;
  padding:18px 20px;
  background:linear-gradient(to top, rgba(18,24,29,.88) 0%, rgba(18,24,29,0) 100%);
  color:#fff;
}
.project-card .pc-tag{font-family:'IBM Plex Mono';font-size:11px;letter-spacing:.08em;color:var(--amber);text-transform:uppercase;}
.project-card .pc-title{font-family:'Space Grotesk';font-size:17px;font-weight:600;margin-top:4px;}
.project-card::after{
  content:"";
  position:absolute;inset:0;
  background-image:
    linear-gradient(to right, #fff 2px, transparent 2px),
    linear-gradient(to bottom, #fff 2px, transparent 2px),
    linear-gradient(to left, #fff 2px, transparent 2px),
    linear-gradient(to bottom, #fff 2px, transparent 2px),
    linear-gradient(to right, #fff 2px, transparent 2px),
    linear-gradient(to top, #fff 2px, transparent 2px),
    linear-gradient(to left, #fff 2px, transparent 2px),
    linear-gradient(to top, #fff 2px, transparent 2px);
  background-repeat:no-repeat;
  background-size:16px 2px, 2px 16px, 16px 2px, 2px 16px, 16px 2px, 2px 16px, 16px 2px, 2px 16px;
  background-position: top left, top left, top right, top right, bottom right, bottom right, bottom left, bottom left;
  opacity:0;
  transition:opacity .25s ease;
  pointer-events:none;
}
.project-card:hover::after{opacity:1;}

@media (max-width: 900px){
  .project-grid{grid-template-columns:1fr;}
  .project-card:first-child{grid-column:span 1;grid-row:span 1;aspect-ratio:4/3;}
}

/* ---------- Lightbox ---------- */
.lightbox{
  display:none;
  position:fixed;inset:0;z-index:1000;
  background:rgba(10,13,16,.94);
  align-items:center;justify-content:center;
  flex-direction:column;
  padding:40px;
}
.lightbox.open{display:flex;}
.lightbox-img{max-width:min(1100px,88vw);max-height:74vh;object-fit:contain;box-shadow:0 20px 60px rgba(0,0,0,.5);}
.lightbox-caption{color:#F2F3F1;font-family:'IBM Plex Mono';font-size:13px;margin-top:18px;letter-spacing:.03em;text-align:center;}
.lightbox-close{
  position:absolute;top:22px;right:28px;
  background:none;border:none;color:#fff;font-size:34px;line-height:1;cursor:pointer;
  font-family:'Space Grotesk';
}
.lightbox-nav{
  position:absolute;top:50%;transform:translateY(-50%);
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.25);color:#fff;
  width:48px;height:48px;border-radius:50%;font-size:26px;cursor:pointer;
}
.lightbox-prev{left:24px;}
.lightbox-next{right:24px;}
@media (max-width:640px){
  .lightbox-nav{width:38px;height:38px;font-size:20px;}
  .lightbox-prev{left:10px;}
  .lightbox-next{right:10px;}
  .lightbox-close{top:14px;right:16px;}
}

/* ---------- Contact form ---------- */
.contact-layout{
  display:grid;
  grid-template-columns:1.35fr 1fr;
  gap:32px;
  align-items:start;
}
.contact-form{display:block;}
.contact-form h3{font-size:20px;}
.form-row{margin-bottom:18px;}
.form-row label{
  display:block;
  font-family:'IBM Plex Mono';
  font-size:11.5px;
  letter-spacing:.06em;
  text-transform:uppercase;
  color:var(--steel);
  margin-bottom:8px;
}
.form-row input[type="text"],
.form-row input[type="email"],
.form-row input[type="tel"],
.form-row select,
.form-row textarea{
  width:100%;
  font-family:'IBM Plex Sans';
  font-size:15px;
  color:var(--ink);
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:2px;
  padding:11px 13px;
  transition:border-color .2s;
}
.form-row textarea{resize:vertical;min-height:110px;}
.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus{
  outline:none;
  border-color:var(--blueprint);
}
.form-row select{cursor:pointer;}
.contact-form .btn{border:none;cursor:pointer;font:inherit;font-family:'IBM Plex Sans';margin-top:4px;}
.form-note{font-size:12.5px;margin-top:12px;max-width:44ch;}
.form-status{font-size:12.5px;margin-top:10px;color:var(--blueprint);min-height:1em;}
/* honeypot: hidden from real visitors, still reachable by bots that ignore CSS */
.hp-field{
  position:absolute;
  left:-9999px;
  top:auto;
  width:1px;height:1px;
  overflow:hidden;
}
.contact-side .panel{padding:30px 26px;}

@media (max-width:900px){
  .contact-layout{grid-template-columns:1fr;}
}