:root{--navy:#101f3d;--red:#e51f2a;--ink:#13213e;--muted:#63728a;--paper:#fff;--warm:#f5f4f1;--line:#d9dde3;--max:1320px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;color:var(--ink);font-family:Arial,Helvetica,sans-serif;line-height:1.6;background:#fff}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}.container{width:min(var(--max),calc(100% - 64px));margin:auto}
header{height:92px;background:#fff;display:flex;align-items:center;position:sticky;top:0;z-index:10;border-bottom:1px solid #eef0f2}.nav{display:flex;align-items:center;justify-content:space-between;gap:30px}.brand img{width:174px;height:auto;object-fit:contain}.navlinks{display:flex;align-items:center;gap:30px;font-size:13px;font-weight:700}.navlinks a:hover{color:var(--red)}.nav-cta{font-size:13px;font-weight:700;border-bottom:2px solid var(--red);padding:8px 0}.menu-toggle{display:none;border:1px solid var(--line);background:#fff;padding:8px 12px;font-size:20px}
.hero{position:relative;min-height:675px;color:#fff;background:var(--navy);display:flex;align-items:stretch;overflow:hidden}.hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,22,43,.98) 0%,rgba(10,22,43,.88) 33%,rgba(10,22,43,.38) 67%,rgba(10,22,43,.05) 100%),url('assets/hero-industrial.jpg') center/cover no-repeat;transform:scale(1.01)}.hero-inner{position:relative;z-index:1;display:flex;flex-direction:column;justify-content:space-between;padding-top:34px}.eyebrow{font-size:11px;letter-spacing:2px;text-transform:uppercase;font-weight:800;display:flex;align-items:center;gap:12px;margin:0 0 24px}.eyebrow:before{content:"";width:27px;height:2px;background:var(--red);display:inline-block}.hero h1{font-size:clamp(48px,5vw,88px);letter-spacing:-3px;line-height:1.05;margin:0 0 28px;max-width:690px;font-weight:800}.accent{color:#ff4c55}.hero-copy{font-size:16px;line-height:1.7;margin:0 0 34px;color:#f3f5fa}.actions{display:flex;align-items:center;gap:28px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:54px;padding:0 25px;background:var(--red);color:#fff;font-size:12px;font-weight:800;transition:.2s;border:1px solid var(--red)}.btn:hover{background:#c91924}.text-link{font-size:12px;font-weight:700;border-bottom:1px solid #aeb7c5;padding:8px 0}.hero-bottom{display:flex;justify-content:space-between;align-items:center;border-top:1px solid rgba(255,255,255,.25);padding:18px 0 24px;margin-top:65px;font-size:10px;letter-spacing:1.5px;text-transform:uppercase;font-weight:700}.service-strip{background:var(--red);color:white;display:grid;grid-template-columns:repeat(5,1fr);text-align:center}.service-strip span{padding:21px 8px;font-size:11px;font-weight:800;letter-spacing:.5px;text-transform:uppercase}
section{padding:100px 0}.section-label{font-size:10px;letter-spacing:2.5px;text-transform:uppercase;color:var(--red);font-weight:800;margin:0 0 26px;display:flex;gap:12px;align-items:center}.section-label:before{content:"";width:27px;height:2px;background:var(--red)}h2{font-size:clamp(34px,3.4vw,52px);line-height:1.12;letter-spacing:-1.8px;margin:0;font-weight:800}.split{display:grid;grid-template-columns:1fr 1fr;gap:10%;align-items:start}.intro h2{max-width:500px}.body-large{font-size:20px;line-height:1.55;margin:0 0 20px}.body-copy{font-size:14px;color:var(--muted);line-height:1.8}.download{display:flex;justify-content:space-between;gap:20px;padding:22px 0;border-bottom:1px solid var(--line);font-size:13px;font-weight:700;margin-top:18px}.download span:last-child{color:var(--red)}.tags{display:flex;gap:22px;margin-top:24px;font-size:10px;font-weight:800;text-transform:uppercase}
.expertise{background:var(--warm)}.section-heading{display:flex;justify-content:space-between;gap:50px;align-items:end;margin-bottom:56px}.section-heading h2{max-width:800px}.section-heading p{max-width:320px;color:var(--muted);font-size:14px;margin:0 0 6px}.cards{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}.expertise-card{background:#fff;padding:28px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);min-height:225px;transition:.2s}.expertise-card:hover{background:#fffafa;box-shadow:inset 0 3px var(--red)}.card-top{display:flex;justify-content:space-between;color:var(--red);font-size:11px;margin-bottom:20px}.card-top b{font-size:22px;font-weight:400;line-height:1}.expertise-card h3{font-size:21px;margin:0 0 12px;line-height:1.25}.expertise-card p{font-size:13px;color:var(--muted);margin:0;max-width:270px}
.field-section{padding:0;display:grid;grid-template-columns:1fr 1fr;min-height:520px}.field-image{min-height:520px;background:url('assets/rooftop-ducts.jpg') center/cover no-repeat}.field-content{background:var(--navy);color:#fff;padding:80px clamp(40px,6vw,115px);display:flex;flex-direction:column;justify-content:center}.field-content h2{font-size:40px;max-width:470px}.field-content p{font-size:14px;color:#d5ddec;margin:30px 0}.field-content .btn{align-self:flex-start;background:white;color:var(--navy);border-color:white}
.projects .section-heading{margin-bottom:35px}.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:30px}.filter{padding:11px 17px;background:white;border:1px solid var(--line);font-size:12px;color:var(--muted);cursor:pointer}.filter.active,.filter:hover{background:var(--navy);border-color:var(--navy);color:#fff}.project-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}.project-card img{width:100%;height:240px;object-fit:cover}.project-image{position:relative}.project-tag{position:absolute;left:14px;bottom:14px;background:var(--navy);color:white;padding:7px 12px;font-size:10px;font-weight:800;text-transform:uppercase}.project-card h3{font-size:21px;line-height:1.3;margin:22px 0 12px}.project-card p{font-size:13px;color:var(--muted);margin:0 0 15px}.project-meta{color:var(--red);font-size:10px;font-weight:800;border-bottom:1px solid var(--line);padding-bottom:20px}.disclaimer{font-size:11px;color:var(--muted);margin-top:20px}
.method{background:var(--navy);color:white}.method-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:12%}.method .section-label{color:#fff}.method-intro p{color:#c8d1e0;max-width:360px;font-size:14px;margin-top:30px}.steps{border-top:1px solid rgba(255,255,255,.2)}.step{display:grid;grid-template-columns:25px 1fr;gap:18px;padding:27px 0;border-bottom:1px solid rgba(255,255,255,.2)}.step-number{color:#ff4c55;font-size:12px;font-weight:800}.step h3{margin:0 0 12px;font-size:22px}.step p{margin:0 0 14px;color:#d3dbea;font-size:13px}.step small{font-size:10px;letter-spacing:.5px;font-weight:800}
.values h2{margin-bottom:48px}.value-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}.value-card{border-top:3px solid var(--red);padding-top:24px}.value-card h3{font-size:19px;margin:0 0 15px}.value-card p{font-size:13px;color:var(--muted);margin:0}.tool-row{border-top:1px solid var(--line);margin-top:55px;padding-top:25px;display:flex;justify-content:space-between;gap:20px;font-size:12px}.tool-row strong{font-size:10px;color:var(--red);letter-spacing:1px}
.partners{background:var(--warm)}.partner-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:35px;margin-top:55px}.partner-card{border-top:3px solid var(--red);padding-top:24px}.partner-card h3{font-size:20px;margin:0 0 14px}.partner-card p{font-size:13px;color:var(--muted);margin:0}
.contact{background:#1a2a4b;color:white}.contact-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:12%;align-items:start}.contact h2{font-size:clamp(40px,4vw,58px)}.contact-details{font-size:13px;line-height:1.9;color:#e0e6ef;margin-top:26px}.contact-details a{color:white;text-decoration:underline;text-underline-offset:4px}.contact-form{background:white;color:var(--ink);padding:36px}.contact-form h3{font-size:26px;margin:0 0 24px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.field{display:flex;flex-direction:column;gap:7px}.field.full{grid-column:1/-1}.field label{font-size:11px;font-weight:800}.field input,.field select,.field textarea{width:100%;border:1px solid #d8dce2;background:#f7f7f6;padding:13px;font:inherit;font-size:13px;color:var(--ink);border-radius:0}.field textarea{min-height:110px;resize:vertical}.form-note{font-size:10px;color:var(--muted);margin:15px 0 0}
footer{padding:45px 0 20px;background:#fff}.footer-top{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:40px;padding-bottom:42px}.footer-logo{width:170px;margin-bottom:18px}.footer-top p,.footer-top a{font-size:12px;color:var(--muted)}.footer-links{display:flex;flex-direction:column;gap:12px}.footer-links a:hover{color:var(--red)}.copyright{border-top:1px solid var(--line);padding-top:18px;font-size:10px;color:var(--muted);display:flex;justify-content:space-between;gap:20px}
@media(max-width:900px){.container{width:min(100% - 38px,var(--max))}.navlinks{gap:15px}.nav-cta{display:none}.hero{min-height:640px}.hero h1{font-size:clamp(45px,8vw,72px)}.split,.method-grid,.contact-grid{gap:45px}.section-heading{align-items:start;flex-direction:column;gap:20px}.cards{grid-template-columns:repeat(2,1fr)}.field-content{padding:55px 35px}.project-grid{gap:18px}.project-card img{height:190px}}
@media(max-width:640px){header{height:76px}.brand img{width:145px}.menu-toggle{display:block}.navlinks{display:none;position:absolute;top:75px;left:0;right:0;background:white;padding:22px;flex-direction:column;align-items:flex-start;border-top:1px solid var(--line);box-shadow:0 12px 20px #0001}.navlinks.open{display:flex}.hero{min-height:650px}.hero:before{background:linear-gradient(90deg,rgba(10,22,43,.95),rgba(10,22,43,.65)),url('assets/hero-industrial.jpg') center/cover no-repeat}.hero-inner{padding-top:32px}.hero h1{font-size:48px;letter-spacing:-1.8px}.hero-copy{font-size:14px}.hero-bottom{margin-top:45px;font-size:8px;gap:15px}.service-strip{grid-template-columns:repeat(2,1fr)}.service-strip span{padding:15px 6px;font-size:9px}.service-strip span:last-child{grid-column:1/-1}section{padding:70px 0}.split,.method-grid,.contact-grid{grid-template-columns:1fr;gap:35px}.intro h2,h2{font-size:36px}.body-large{font-size:18px}.cards{grid-template-columns:1fr}.expertise-card{min-height:190px}.field-section{grid-template-columns:1fr}.field-image{min-height:320px}.field-content{padding:55px 24px}.field-content h2{font-size:34px}.project-grid{grid-template-columns:1fr;gap:35px}.project-card img{height:240px}.value-grid,.partner-grid{grid-template-columns:1fr;gap:28px}.tool-row{flex-direction:column}.contact-form{padding:24px}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.footer-top{grid-template-columns:1fr;gap:28px}.copyright{flex-direction:column;gap:5px}.actions{gap:18px}}

/* Reference-matched interactions and legal dialog */
.expertise-card{cursor:pointer;outline-offset:-3px}.expertise-card:focus-visible{outline:2px solid var(--red)}.expertise-detail{display:none;margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}.expertise-card.expanded .expertise-detail{display:block}.expertise-detail p{max-width:none;line-height:1.7;margin:0 0 12px}.expertise-detail small{display:block;color:var(--red);font-size:10px;font-weight:800;line-height:1.7}.expertise-hint{margin:24px 0 0;color:var(--muted);font-size:12px}.legal-modal{display:none;position:fixed;inset:0;z-index:100}.legal-modal.open{display:block}.legal-backdrop{position:absolute;inset:0;background:rgba(8,18,35,.72)}.legal-panel{position:relative;background:#fff;color:var(--ink);width:min(680px,calc(100% - 32px));max-height:85vh;overflow:auto;margin:7vh auto;padding:42px}.legal-panel .section-label{margin-bottom:18px}.legal-panel h2{margin-bottom:22px}.legal-panel h3{margin-top:28px}.legal-panel p{font-size:14px;line-height:1.8;color:var(--muted)}.legal-panel a{color:var(--red);text-decoration:underline}.legal-close{position:absolute;right:16px;top:10px;border:0;background:transparent;font-size:30px;cursor:pointer;color:var(--ink)}
@media(max-width:640px){.legal-panel{padding:28px 22px}.expertise-detail p{font-size:12px}}