:root{
  --ink:#101517;
  --ink2:#1c2529;
  --blue:#2e647a;
  --blue2:#7aa8ba;
  --orange:#d66f35;
  --orange2:#efa272;
  --concrete:#ddd8cf;
  --paper:#f5f3ee;
  --white:#fff;
  --muted:#6b7477;
  --line:rgba(16,21,23,.13);
  --shadow:0 28px 78px rgba(16,21,23,.14);
  --sans:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --serif:Georgia,"Times New Roman",serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);line-height:1.62;overflow-x:hidden}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
.container{width:min(1240px,calc(100% - 44px));margin-inline:auto}
.section{padding:108px 0}
.section.tight{padding:72px 0}
.dark{background:var(--ink);color:white}
.concrete{background:var(--concrete)}
.eyebrow{text-transform:uppercase;letter-spacing:.19em;font-size:.7rem;font-weight:650;color:var(--blue)}
.dark .eyebrow{color:#9ec3d1}
.display{font-family:var(--serif);font-weight:500;line-height:.95;letter-spacing:-.045em;margin:0}
h1.display{font-size:clamp(3.8rem,8vw,8.1rem)}
h2.display{font-size:clamp(2.7rem,5.2vw,5.3rem)}
h3{line-height:1.12}
p{margin:0 0 1rem}
.muted{color:var(--muted)}
.dark .muted{color:rgba(255,255,255,.62)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.stack{display:grid;gap:16px}
.rule{height:1px;background:var(--line);margin:28px 0}
.btn{
  min-height:50px;padding:0 22px;border:1px solid transparent;border-radius:999px;
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-weight:620;transition:.22s ease;cursor:pointer
}
.btn.primary{background:var(--ink);color:white}
.btn.primary:hover{background:#263136;transform:translateY(-2px)}
.btn.orange{background:var(--orange);color:white}
.btn.orange:hover{background:#b75b2a;transform:translateY(-2px)}
.btn.light{background:white;color:var(--ink)}
.btn.outline{background:transparent;border-color:var(--line)}
.dark .btn.outline{border-color:rgba(255,255,255,.24);color:white}
.btn-row{display:flex;gap:11px;flex-wrap:wrap}
.card{background:white;border:1px solid var(--line);padding:28px;box-shadow:0 14px 38px rgba(16,21,23,.045)}
.card h3{font-family:var(--serif);font-size:1.55rem;font-weight:500;margin:0 0 8px}
.card p{color:var(--muted)}
.dark .card{color:var(--ink)}
.dark .card h3{color:var(--ink)}
.dark .card p{color:var(--muted)}

/* centered attached header */
header{
  position:sticky;top:0;z-index:80;background:rgba(245,243,238,.965);
  backdrop-filter:blur(18px);border-bottom:1px solid var(--line)
}
.nav{
  min-height:80px;display:grid;grid-template-columns:minmax(220px,1fr) auto minmax(220px,1fr);
  align-items:center;gap:26px
}
.brand{justify-self:start;display:flex;align-items:center;gap:11px}
.brandmark{
  width:44px;height:44px;background:var(--ink);color:white;display:grid;place-items:center;
  font-family:var(--sans);font-size:.9rem;font-weight:600;position:relative;overflow:hidden
}
.brandmark:after{content:"";position:absolute;width:14px;height:62px;background:var(--orange);right:1px;top:-9px;transform:rotate(28deg)}
.brandmark span{position:relative;z-index:2}
.brand strong{display:block;font-family:var(--serif);font-size:1.1rem;font-weight:500;line-height:1}
.brand small{display:block;color:var(--muted);font-size:.58rem;letter-spacing:.13em;text-transform:uppercase;margin-top:4px}
.navlinks{justify-self:center;display:flex;align-items:center;gap:0}
.navlinks>a,.dropbtn{
  min-height:80px;padding:0 13px;display:flex;align-items:center;white-space:nowrap;
  color:#454e51;font-size:.8rem;font-weight:500;border:0;background:transparent;position:relative
}
.navlinks>a:after,.dropbtn:after{
  content:"";position:absolute;left:13px;right:13px;bottom:17px;height:1px;
  background:var(--orange);transform:scaleX(0);transform-origin:left;transition:.2s
}
.navlinks>a:hover,.dropbtn:hover,.dropdown:hover .dropbtn{color:var(--orange)}
.navlinks>a:hover:after,.dropbtn:hover:after,.dropdown:hover .dropbtn:after{transform:scaleX(1)}
.navcta{justify-self:end}
.navcta .btn{min-height:44px;padding-inline:17px;font-size:.78rem;font-weight:550}
.dropdown{position:static}
.dropdown-menu{
  position:absolute;top:80px;left:50%;transform:translate(-50%,10px);
  width:min(720px,calc(100vw - 70px));padding:15px;
  display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:8px;
  background:rgba(245,243,238,.985);border:1px solid var(--line);border-top:0;
  box-shadow:0 24px 60px rgba(16,21,23,.12);opacity:0;visibility:hidden;transition:.2s
}
.dropdown:hover .dropdown-menu,.dropdown.open .dropdown-menu{opacity:1;visibility:visible;transform:translate(-50%,0)}
.dropdown-menu a{
  min-height:92px;background:white;border:1px solid rgba(16,21,23,.08);
  display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;
  padding:16px;font-size:.82rem;font-weight:500;transition:.2s
}
.dropdown-menu a:before{font-size:.58rem;letter-spacing:.14em;text-transform:uppercase;color:var(--blue);font-weight:650;margin-bottom:6px}
.dropdown-menu a:nth-child(1):before{content:"Capabilities"}
.dropdown-menu a:nth-child(2):before{content:"Transport"}
.dropdown-menu a:nth-child(3):before{content:"Water"}
.dropdown-menu a:nth-child(4):before{content:"Built environment"}
.dropdown-menu a:nth-child(5):before{content:"Portfolio"}
.dropdown-menu a:hover{transform:translateY(-2px);border-color:rgba(214,111,53,.25);box-shadow:0 10px 24px rgba(16,21,23,.06)}
.dropdown-menu a:first-child{grid-row:span 2;min-height:192px;background:linear-gradient(145deg,#e1e9ec,#f0f3f2);font-family:var(--serif);font-size:1.42rem}
.menu-btn{display:none;border:0;background:var(--ink);color:white;width:46px;height:46px}
.mobile-menu{
  display:none;position:fixed;top:70px;left:0;right:0;z-index:79;background:rgba(245,243,238,.99);
  padding:18px 22px 28px;border-bottom:1px solid var(--line);box-shadow:0 24px 50px rgba(16,21,23,.12)
}
.mobile-menu.open{display:block}
.mobile-menu a{display:block;padding:14px 0;border-bottom:1px solid var(--line);font-weight:500}
.mobile-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:10px 0}
.mobile-grid a{background:white;padding:11px;border:1px solid var(--line);text-align:center;font-size:.82rem}

/* hero */
.hero{min-height:790px;position:relative;overflow:hidden;color:white;background:#0e1416}
.hero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero:after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(90deg,rgba(8,12,14,.96) 0%,rgba(8,12,14,.82) 47%,rgba(8,12,14,.28) 76%,rgba(8,12,14,.16) 100%)
}
.hero .container{position:relative;z-index:2;min-height:790px;display:flex;align-items:center}
.hero-copy{max-width:820px;padding-block:70px}
.hero-copy .eyebrow{color:#a5cad7}
.hero-copy .display span{color:var(--orange2)}
.hero-copy>p{font-size:1.08rem;color:#c6cfd2;max-width:690px;margin:28px 0}
.hero-tags{display:flex;gap:8px;flex-wrap:wrap;margin:25px 0}
.hero-tags span{padding:8px 11px;border:1px solid rgba(255,255,255,.22);font-size:.73rem;background:rgba(9,14,16,.48)}

.statstrip{background:var(--orange);color:white}
.statstrip .container{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:24px;border-left:1px solid rgba(255,255,255,.23)}
.stat:first-child{border-left:0}
.stat strong{display:block;font-family:var(--serif);font-size:1.5rem;font-weight:500}
.stat span{font-size:.79rem;color:rgba(255,255,255,.8)}

.photo{min-height:520px;position:relative;overflow:hidden;background:#273135;box-shadow:var(--shadow)}
.photo img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.photo.tall{min-height:650px}
.photo.short{min-height:365px}

.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.service{
  min-height:238px;background:white;border:1px solid var(--line);padding:27px;transition:.22s
}
.service:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.service .num{font-size:.65rem;letter-spacing:.14em;color:var(--orange);font-weight:650}
.service h3{font-family:var(--serif);font-size:1.5rem;font-weight:500;margin:18px 0 8px}
.service p{font-size:.9rem;color:var(--muted)}
.service a{font-size:.82rem;font-weight:600;color:var(--blue)}

.editorial{display:grid;grid-template-columns:1.08fr .92fr;align-items:center}
.editorial .photo{min-height:620px}
.editorial-copy{
  margin-left:-72px;position:relative;z-index:2;background:var(--paper);
  padding:58px;border:1px solid var(--line);box-shadow:0 24px 55px rgba(16,21,23,.11)
}

.values{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.13)}
.value{background:var(--ink);padding:28px}
.value b{display:block;font-family:var(--serif);font-size:2rem;font-weight:500;color:var(--orange2);margin-bottom:10px}
.value strong{display:block;font-weight:600;margin-bottom:7px}
.value p{font-size:.87rem;color:rgba(255,255,255,.61)}

/* inner hero */
.pagehero{padding:100px 0 78px;background:linear-gradient(135deg,#12191c,#273238);color:white}
.pagehero .display{max-width:1080px}
.pagehero p{max-width:800px;color:#bec9cd;font-size:1.05rem;margin-top:22px}

.feature-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.feature{background:white;border:1px solid var(--line);padding:24px}
.feature span{display:block;font-size:.65rem;letter-spacing:.13em;text-transform:uppercase;color:var(--blue);font-weight:650}
.feature h3{font-family:var(--serif);font-size:1.38rem;font-weight:500;margin:8px 0}
.feature p{color:var(--muted);font-size:.9rem}

/* smart portfolio */
.filters{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 28px}
.filter{
  padding:10px 14px;border:1px solid var(--line);background:transparent;color:var(--ink);
  border-radius:999px;font-size:.79rem;font-weight:600;cursor:pointer
}
.filter.active,.filter:hover{background:var(--ink);color:white;border-color:var(--ink)}
.project-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.project{
  background:white;border:1px solid var(--line);padding:28px;min-height:300px;
  position:relative;overflow:hidden;transition:.22s
}
.project:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.project.hide{display:none}
.project .type{font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--blue);font-weight:650}
.project h3{font-family:var(--serif);font-size:2rem;font-weight:500;margin:12px 0}
.project .project-meta{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:24px;border-top:1px solid var(--line);padding-top:18px}
.project .project-meta div{font-size:.78rem;color:var(--muted)}
.project .project-meta strong{display:block;color:var(--ink);font-size:.9rem;font-weight:600}
.project:after{
  content:"";position:absolute;width:160px;height:160px;border:24px solid rgba(46,100,122,.045);
  right:-70px;top:-70px;transform:rotate(25deg)
}

/* contact */
.contact-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:24px}
.contact-card{background:var(--ink);color:white;padding:36px}
.contact-card p{color:rgba(255,255,255,.65)}
.contact-form{background:white;border:1px solid var(--line);padding:36px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:13px}
.field{display:grid;gap:6px;margin-bottom:13px}
.field label{font-size:.78rem;font-weight:600}
.field input,.field select,.field textarea{width:100%;padding:13px 14px;border:1px solid var(--line);background:white;outline:none}
.field textarea{min-height:125px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--orange);box-shadow:0 0 0 4px rgba(214,111,53,.08)}
.form-result{display:none;background:#e7ecee;padding:16px;margin-top:12px}

/* footer */
footer{background:#090d0f;color:white;padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:44px}
footer a{color:#b5c0c3}
.footer-links{display:grid;gap:8px;margin-top:14px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:42px;padding-top:20px;color:#748186;font-size:.77rem;display:flex;justify-content:space-between;gap:20px}
.float-contact{position:fixed;right:17px;bottom:17px;z-index:60;box-shadow:0 14px 35px rgba(0,0,0,.28)}

@media(max-width:1080px){
  .nav{grid-template-columns:1fr auto;min-height:70px}
  .navlinks,.navcta{display:none}
  .menu-btn{display:block;justify-self:end}
  .grid2,.editorial,.contact-grid{grid-template-columns:1fr}
  .editorial-copy{margin:-48px 28px 0}
  .service-grid,.grid4,.statstrip .container{grid-template-columns:1fr 1fr}
  .grid3{grid-template-columns:1fr 1fr}
  .values{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-grid>div:first-child{grid-column:1/-1}
}
@media(max-width:680px){
  .container{width:min(100% - 26px,1240px)}
  .brand small{display:none}
  .section{padding:76px 0}
  .section.tight{padding:54px 0}
  h1.display{font-size:clamp(3rem,15vw,4.8rem)}
  h2.display{font-size:clamp(2.35rem,12vw,3.7rem)}
  .hero,.hero .container{min-height:690px}
  .hero:after{background:linear-gradient(90deg,rgba(8,12,14,.93),rgba(8,12,14,.56))}
  .service-grid,.grid4,.grid3,.statstrip .container,.feature-list,.values,.project-grid,.form-grid,.footer-grid{grid-template-columns:1fr}
  .stat{border-left:0;border-top:1px solid rgba(255,255,255,.23)}
  .stat:first-child{border-top:0}
  .photo,.photo.tall{min-height:430px}
  .editorial-copy{margin:-36px 12px 0;padding:34px 22px}
  .footer-grid>div:first-child{grid-column:auto}
  .footer-bottom{flex-direction:column}
  .mobile-grid{grid-template-columns:1fr}
  .contact-form,.contact-card{padding:26px 22px}
}