:root{
  --blue:#075a98;
  --blue-2:#0b6aa9;
  --navy:#063b61;
  --navy-deep:#052b46;
  --green:#16963b;
  --green-soft:#69cf78;
  --ink:#18303f;
  --muted:#64727b;
  --paper:#f5f8fa;
  --white:#fff;
  --line:#dfe7eb;
  --shadow:0 20px 55px rgba(5,44,70,.12);
  --shell:min(1220px, calc(100vw - 56px));
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,Segoe UI,Arial,Helvetica,sans-serif;color:var(--ink);background:#fff;line-height:1.55;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%}
button{font:inherit}
.shell{width:var(--shell);margin-inline:auto}
.section{padding:110px 0}
.section-kicker{display:flex;align-items:center;gap:12px;font-size:12px;font-weight:800;letter-spacing:.17em;text-transform:uppercase;color:var(--green);margin-bottom:16px}
.section-kicker:after{content:"";width:56px;height:2px;background:currentColor;opacity:.65}
.section-kicker.light{color:#77e48a}
h1,h2,h3,p{margin:0}
h1,h2,h3{color:var(--navy-deep);letter-spacing:-.035em}
h2{font-size:clamp(42px,4.8vw,68px);line-height:1.04}
p{color:var(--muted)}

.site-header{position:fixed;z-index:100;top:0;left:0;right:0;transition:.28s ease;background:rgba(255,255,255,.92);backdrop-filter:blur(15px);border-bottom:1px solid rgba(11,76,115,.08)}
.site-header.scrolled{background:rgba(255,255,255,.98);box-shadow:0 10px 30px rgba(3,43,68,.08)}
.nav-shell{width:var(--shell);height:86px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:32px}
.brand{display:flex;align-items:center;flex:0 0 auto;width:154px;height:64px;padding:5px 0;overflow:visible}
.brand img{width:100%;height:100%;object-fit:contain;object-position:left center}
.main-nav{display:flex;align-items:center;gap:30px;font-size:12px;font-weight:800;text-transform:uppercase;letter-spacing:.07em;color:var(--navy)}
.main-nav>a:not(.nav-cta){position:relative;padding:31px 0}
.main-nav>a:not(.nav-cta):after{content:"";position:absolute;left:0;right:100%;bottom:22px;height:2px;background:var(--green);transition:.25s ease}
.main-nav>a:not(.nav-cta):hover:after{right:0}
.nav-cta{background:var(--navy);color:#fff;padding:14px 19px;border-radius:999px;box-shadow:0 8px 20px rgba(4,52,82,.15);transition:.25s ease}
.nav-cta:hover{transform:translateY(-2px);background:var(--blue)}
.nav-cta span{margin-left:9px;color:#8cf19b}
.menu-toggle{display:none;width:44px;height:44px;border:0;background:transparent;padding:8px;cursor:pointer}
.menu-toggle span{display:block;height:2px;background:var(--navy);margin:6px 0;border-radius:99px}

.hero{position:relative;min-height:900px;height:100svh;max-height:1080px;color:#fff;display:flex;align-items:flex-end;overflow:hidden;background:#153c50;padding-top:86px}
.hero-media{position:absolute;inset:86px 0 0;background:url('assets/hero-mining.jpg') center 53%/cover no-repeat;transform:scale(1.01)}
.hero-overlay{position:absolute;inset:86px 0 0;background:linear-gradient(90deg,rgba(4,36,58,.92) 0%,rgba(4,36,58,.66) 38%,rgba(4,36,58,.2) 67%,rgba(4,36,58,.05) 100%),linear-gradient(0deg,rgba(4,36,58,.76) 0%,transparent 50%)}
.hero-content{position:relative;z-index:2;padding:0 0 205px}
.eyebrow{font-size:13px;letter-spacing:.18em;font-weight:900;text-transform:uppercase;margin-bottom:18px}
.eyebrow.light{color:#8be899}.eyebrow i{font-style:normal;color:#fff;opacity:.55;margin:0 6px}
.hero h1{color:#fff;font-size:clamp(58px,6.4vw,96px);line-height:.96;max-width:850px;text-shadow:0 8px 28px rgba(0,0,0,.14)}
.hero h1 span{color:#85e58e}
.hero-content>p{color:rgba(255,255,255,.9);font-size:20px;max-width:670px;margin-top:26px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:12px;min-height:52px;padding:0 23px;border-radius:999px;font-size:12px;font-weight:900;letter-spacing:.08em;text-transform:uppercase;transition:.25s ease}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 14px 28px rgba(0,66,110,.22)}
.btn-primary:hover{background:#0b71b7}
.btn-primary span{color:#9af1a4}
.btn-ghost{color:#fff;border:1px solid rgba(255,255,255,.65);background:rgba(4,38,60,.24);backdrop-filter:blur(4px)}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.hero-meta-wrap{position:absolute;z-index:3;left:0;right:0;bottom:0;background:rgba(4,42,66,.88);backdrop-filter:blur(12px);border-top:1px solid rgba(255,255,255,.14)}
.hero-meta{height:112px;display:grid;grid-template-columns:repeat(4,1fr)}
.hero-meta a{display:flex;align-items:center;gap:14px;padding:0 24px;border-left:1px solid rgba(255,255,255,.12);color:#fff;text-transform:uppercase;font-size:11px;letter-spacing:.06em;font-weight:800;transition:.25s ease}
.hero-meta a:first-child{border-left:0}
.hero-meta a:hover{background:rgba(255,255,255,.06)}
.hero-meta b{color:#7be787;font-size:21px}
.hero-meta span{max-width:160px}

.intro-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:95px;align-items:start}
.intro-copy{padding-top:10px}
.intro-copy p{font-size:17px;margin-bottom:18px}
.text-link{display:inline-flex;gap:9px;align-items:center;margin-top:8px;color:var(--blue);font-weight:800;font-size:13px;text-transform:uppercase;letter-spacing:.06em}
.text-link span{color:var(--green)}
.trust-strip{margin-top:72px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);display:grid;grid-template-columns:repeat(4,1fr)}
.trust-strip>div{padding:27px 22px;border-left:1px solid var(--line)}
.trust-strip>div:first-child{border-left:0;padding-left:0}
.trust-strip strong{display:block;color:var(--navy);font-size:20px;line-height:1.2;margin-bottom:6px}
.trust-strip span{font-size:12px;color:#738189}

.services{background:var(--paper)}
.section-heading{display:flex;align-items:end;justify-content:space-between;gap:60px;margin-bottom:55px}
.section-heading>div{max-width:770px}
.section-heading>p{max-width:390px;font-size:15px}
.service-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:18px}
.service-card{grid-column:span 4;background:#fff;border:1px solid var(--line);border-radius:22px;padding:30px;min-height:335px;display:flex;flex-direction:column;box-shadow:0 12px 30px rgba(7,59,97,.04);transition:.28s ease;position:relative;overflow:hidden}
.service-card:before{content:"";position:absolute;left:0;top:0;width:0;height:4px;background:linear-gradient(90deg,var(--green),var(--blue));transition:.28s ease}
.service-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.service-card:hover:before{width:100%}
.service-card.featured{grid-column:span 6;background:var(--navy);border-color:var(--navy);color:#fff}
.service-card:nth-child(2){grid-column:span 6}
.service-card:nth-child(3),.service-card:nth-child(4){grid-column:span 6}
.service-card.featured h3,.service-card.featured p{color:#fff}
.service-card.featured p{color:rgba(255,255,255,.72)}
.service-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:52px}
.service-index{color:var(--green);font-size:12px;font-weight:900;letter-spacing:.12em}
.service-symbol{font-size:34px;color:var(--blue)}
.featured .service-symbol{color:#83e78c}
.service-card h3{font-size:31px;line-height:1.08;margin-bottom:16px}
.service-card p{font-size:14px}
.tags{display:flex;gap:7px;flex-wrap:wrap;margin-top:auto;padding-top:28px}
.tags span{font-size:10px;font-weight:800;letter-spacing:.07em;text-transform:uppercase;border:1px solid var(--line);padding:7px 10px;border-radius:999px;color:#66757e}
.featured .tags span{border-color:rgba(255,255,255,.2);color:rgba(255,255,255,.7)}
.service-wide{grid-column:1/-1;min-height:auto;display:grid;grid-template-columns:.22fr 1fr 1fr;align-items:center;gap:36px}
.service-wide .service-top{margin:0}.service-wide .tags{padding:0;justify-content:flex-end}

.approach{background:var(--navy-deep);color:#fff;position:relative;overflow:hidden}
.approach:before{content:"";position:absolute;inset:-40% -10%;background:repeating-radial-gradient(ellipse at 30% 40%,transparent 0 38px,rgba(255,255,255,.022) 39px 40px);transform:rotate(-7deg);pointer-events:none}
.approach .shell{position:relative;z-index:1}
.approach-head{display:grid;grid-template-columns:1.15fr .85fr;gap:90px;align-items:end;margin-bottom:62px}
.approach h2{color:#fff}
.approach-head>p{color:rgba(255,255,255,.66);font-size:16px}
.workflow{display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid rgba(255,255,255,.14);border-bottom:1px solid rgba(255,255,255,.14)}
.workflow article{padding:30px 24px 34px;border-left:1px solid rgba(255,255,255,.12);min-height:230px;transition:.25s ease}
.workflow article:first-child{border-left:0}
.workflow article:hover{background:rgba(255,255,255,.04)}
.workflow span{display:block;color:#79e786;font-size:12px;font-weight:900;letter-spacing:.12em;margin-bottom:44px}
.workflow h3{color:#fff;font-size:21px;line-height:1.15;margin-bottom:12px}
.workflow p{color:rgba(255,255,255,.58);font-size:12.5px}

.projects-heading{align-items:center}
.project-filters{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.filter{border:1px solid var(--line);background:#fff;color:#6b777d;border-radius:999px;padding:9px 13px;font-size:10px;font-weight:900;text-transform:uppercase;letter-spacing:.07em;cursor:pointer;transition:.2s ease}
.filter.active,.filter:hover{background:var(--blue);border-color:var(--blue);color:#fff}
.portfolio-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:16px}
.portfolio-card{grid-column:span 4;min-height:360px;border-radius:18px;position:relative;overflow:hidden;cursor:pointer;background:#0a3452;box-shadow:0 12px 30px rgba(5,45,72,.08);transition:.3s ease}
.portfolio-card.hero-card{grid-column:span 4}
.portfolio-card.wide-card{grid-column:span 6;min-height:330px}
.portfolio-card.hidden{display:none}
.portfolio-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .55s ease}
.portfolio-card:hover{transform:translateY(-4px)}
.portfolio-card:hover img{transform:scale(1.04)}
.portfolio-shade{position:absolute;inset:0;background:linear-gradient(0deg,rgba(3,35,56,.96) 0%,rgba(3,35,56,.62) 42%,rgba(3,35,56,.04) 77%)}
.portfolio-copy{position:absolute;left:0;right:0;bottom:0;padding:25px;color:#fff}
.portfolio-copy small{display:block;color:#7dec8a;font-weight:900;letter-spacing:.12em;font-size:10px;margin-bottom:8px}
.portfolio-copy h3{color:#fff;font-size:25px;line-height:1.06;margin-bottom:9px}
.portfolio-copy p{color:rgba(255,255,255,.72);font-size:12.5px;max-width:460px}
.portfolio-copy>span{display:inline-block;margin-top:15px;font-size:10px;text-transform:uppercase;letter-spacing:.1em;font-weight:900;color:#fff}
.project-ledger-wrap{display:grid;grid-template-columns:.42fr .58fr;gap:65px;margin-top:88px;padding-top:60px;border-top:1px solid var(--line)}
.ledger-intro h3{font-size:35px;line-height:1.12}
.project-ledger{border-top:2px solid var(--navy)}
.ledger-row{display:grid;grid-template-columns:1.15fr .55fr 1.3fr;gap:20px;padding:16px 0;border-bottom:1px solid var(--line);font-size:12.5px;color:#55646d}
.ledger-row span:first-child{font-weight:800;color:#263f4d}
.ledger-row.header{font-size:10px;text-transform:uppercase;letter-spacing:.12em;font-weight:900;color:#89969c}
.ledger-row.header span{color:#89969c}

.visual-band{position:relative;min-height:630px;display:flex;align-items:center;color:#fff;overflow:hidden;background:#0c314c}
.visual-band-bg{position:absolute;inset:0;background:url('assets/hero-mining.jpg') center 55%/cover no-repeat;transform:scale(1.02)}
.visual-band:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(4,36,58,.94) 0%,rgba(4,36,58,.65) 50%,rgba(4,36,58,.18) 100%)}
.visual-band-content{position:relative;z-index:2}
.visual-band h2{color:#fff;max-width:870px;font-size:clamp(50px,5.8vw,82px)}
.visual-band p{color:rgba(255,255,255,.75);font-size:17px;max-width:650px;margin-top:28px}

.contact{background:#fff}
.contact-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:85px;align-items:start}
.contact-lead{font-size:17px;max-width:660px;margin-top:25px}
.contact-card{background:var(--paper);border:1px solid var(--line);border-radius:24px;padding:34px;box-shadow:0 16px 36px rgba(8,58,92,.05)}
.contact-line{display:grid;grid-template-columns:100px 1fr;gap:18px;padding:14px 0;border-bottom:1px solid var(--line);font-size:13px}
.contact-line>span{text-transform:uppercase;letter-spacing:.1em;font-size:9px;font-weight:900;color:#87949a;padding-top:4px}
.contact-line a,.contact-line strong{color:var(--navy);font-weight:800}
.contact-actions{margin-top:26px}

.footer{background:#061f32;color:#fff;padding:62px 0 20px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:45px}
.footer-brand img{width:170px;max-height:82px;object-fit:contain;object-position:left center;filter:brightness(0) invert(1);opacity:.92;margin-bottom:15px}
.footer-brand p{color:rgba(255,255,255,.42);font-size:11px;text-transform:uppercase;letter-spacing:.11em}
.footer-grid>div:not(.footer-brand){display:flex;flex-direction:column;gap:9px;font-size:12px;color:rgba(255,255,255,.56)}
.footer-grid strong{color:#fff;margin-bottom:5px}
.footer-grid a:hover{color:#88ec94}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(255,255,255,.1);margin-top:50px;padding-top:19px;font-size:10px;color:rgba(255,255,255,.38)}

.lightbox{position:fixed;z-index:1000;inset:0;background:rgba(2,19,31,.9);display:none;align-items:center;justify-content:center;padding:38px;backdrop-filter:blur(8px)}
.lightbox.open{display:flex}
.lightbox img{max-width:min(1280px,92vw);max-height:86vh;object-fit:contain;border-radius:16px;box-shadow:0 30px 80px rgba(0,0,0,.45)}
.lightbox-close{position:absolute;top:22px;right:28px;width:48px;height:48px;border:1px solid rgba(255,255,255,.25);border-radius:50%;background:rgba(255,255,255,.08);color:#fff;font-size:28px;cursor:pointer}

.reveal{opacity:0;transform:translateY(20px);transition:.68s ease}
.reveal.visible{opacity:1;transform:none}

@media (max-width:1020px){
  :root{--shell:min(100% - 36px,1220px)}
  .section{padding:88px 0}
  .nav-shell{height:78px}.brand{width:142px;height:58px}
  .main-nav{position:fixed;top:78px;left:18px;right:18px;display:none;flex-direction:column;align-items:stretch;gap:0;background:#fff;color:var(--navy);padding:16px;border-radius:18px;box-shadow:var(--shadow)}
  .main-nav.open{display:flex}
  .main-nav>a:not(.nav-cta){padding:13px 10px}.main-nav>a:not(.nav-cta):after{display:none}
  .main-nav .nav-cta{margin-top:10px;text-align:center}
  .menu-toggle{display:block}
  .hero{min-height:820px;padding-top:78px}.hero-media,.hero-overlay{inset:78px 0 0}
  .hero-content{padding-bottom:180px}.hero-meta{height:120px;grid-template-columns:repeat(2,1fr)}.hero-meta a:nth-child(3){border-left:0;border-top:1px solid rgba(255,255,255,.1)}.hero-meta a:nth-child(4){border-top:1px solid rgba(255,255,255,.1)}
  .intro-grid,.approach-head,.contact-grid,.project-ledger-wrap{grid-template-columns:1fr;gap:40px}
  .trust-strip{grid-template-columns:repeat(2,1fr)}.trust-strip>div:nth-child(3){border-left:0;border-top:1px solid var(--line)}.trust-strip>div:nth-child(4){border-top:1px solid var(--line)}
  .workflow{grid-template-columns:repeat(2,1fr)}.workflow article:nth-child(3),.workflow article:nth-child(5){border-left:0}.workflow article{border-top:1px solid rgba(255,255,255,.1)}
  .portfolio-card,.portfolio-card.hero-card{grid-column:span 6}.portfolio-card.wide-card{grid-column:span 6}
  .service-card.featured,.service-card:nth-child(2),.service-card:nth-child(3),.service-card:nth-child(4){grid-column:span 6}
  .footer-grid{grid-template-columns:1.3fr 1fr 1fr}.footer-grid>div:last-child{display:none}
}

@media (max-width:680px){
  :root{--shell:calc(100vw - 28px)}
  .section{padding:72px 0}
  .nav-shell{height:72px}.brand{width:128px;height:52px}.hero{padding-top:72px;min-height:790px;height:100svh}.hero-media,.hero-overlay{inset:72px 0 0}
  .hero-media{background-position:58% 53%}
  .hero-overlay{background:linear-gradient(90deg,rgba(4,36,58,.92),rgba(4,36,58,.58)),linear-gradient(0deg,rgba(4,36,58,.88),transparent 50%)}
  .hero-content{padding-bottom:175px}.hero h1{font-size:49px;line-height:.99}.hero-content>p{font-size:16px;margin-top:20px}.hero-actions{margin-top:26px}.btn{min-height:48px;padding:0 18px}
  .hero-meta{height:138px;grid-template-columns:1fr 1fr}.hero-meta a{padding:0 12px;gap:8px;font-size:9px}.hero-meta b{font-size:16px}
  h2{font-size:40px}.section-heading{align-items:flex-start;flex-direction:column;gap:24px;margin-bottom:38px}
  .trust-strip{grid-template-columns:1fr}.trust-strip>div,.trust-strip>div:first-child{border-left:0;border-top:1px solid var(--line);padding:21px 0}.trust-strip>div:first-child{border-top:0}
  .service-grid{display:block}.service-card,.service-card.featured,.service-card:nth-child(2),.service-card:nth-child(3),.service-card:nth-child(4){margin-bottom:13px;min-height:auto}.service-top{margin-bottom:32px}.service-wide{display:flex}.service-card h3{font-size:28px}
  .approach-head{margin-bottom:38px}.workflow{display:block}.workflow article{border-left:0;border-top:1px solid rgba(255,255,255,.12);min-height:auto}.workflow span{margin-bottom:24px}
  .project-filters{justify-content:flex-start}.portfolio-grid{display:block}.portfolio-card,.portfolio-card.hero-card,.portfolio-card.wide-card{min-height:390px;margin-bottom:14px}.portfolio-copy{padding:22px}.portfolio-copy h3{font-size:23px}
  .project-ledger-wrap{margin-top:58px;padding-top:42px}.ledger-row{grid-template-columns:1fr;gap:4px}.ledger-row.header{display:none}.ledger-row span:nth-child(2){color:var(--green);font-weight:800}
  .visual-band{min-height:570px}.visual-band h2{font-size:48px}
  .contact-card{padding:24px}.contact-line{grid-template-columns:1fr;gap:5px}
  .footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.footer-bottom{flex-direction:column}
}