:root{--navy:#071d3d;--navy2:#0b2d59;--blue:#1561ad;--cyan:#08b7df;--ice:#eff8fc;--white:#fff;--ink:#10233d;--muted:#61738a;--line:#dbe7ef;--radius:18px;--shadow:0 22px 60px rgba(5,31,65,.12)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.6}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.skip{position:absolute;left:-999px;top:0}.skip:focus{left:1rem;top:1rem;background:#fff;padding:.7rem;z-index:100}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.site-header{height:84px;background:rgba(255,255,255,.97);position:sticky;top:0;z-index:50;border-bottom:1px solid rgba(8,44,82,.08);backdrop-filter:blur(16px)}.nav-wrap{max-width:1240px;height:100%;margin:auto;padding:0 24px;display:flex;align-items:center;gap:32px}.brand{width:205px;margin-right:auto}.brand img{width:100%;height:auto}.site-header nav{display:flex;gap:30px;align-items:center}.site-header nav a{font-size:.91rem;font-weight:650;color:#263c55}.site-header nav a:hover{color:var(--blue)}.nav-cta,.button{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:8px;font-weight:750;cursor:pointer}.nav-cta{background:var(--navy);color:#fff;padding:12px 19px;font-size:.88rem}.menu-toggle{display:none;background:none;border:0;padding:8px}.menu-toggle span:not(.sr-only){display:block;width:24px;height:2px;background:var(--navy);margin:5px}.hero{min-height:690px;position:relative;color:#fff;display:flex;align-items:center;overflow:hidden}.hero-media{position:absolute;inset:0;background:url('assets/hero-hvac.webp') center/cover no-repeat;transform:scale(1.01)}.hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,22,49,.96) 0%,rgba(5,29,61,.83) 40%,rgba(5,26,55,.25) 70%,rgba(5,26,55,.08) 100%)}.hero-content{position:relative;z-index:2;width:min(1240px,100%);padding:54px 24px 130px;margin:auto}.eyebrow{text-transform:uppercase;letter-spacing:.18em;font-size:.74rem;font-weight:850;color:#75ddf5;margin:0 0 18px}.eyebrow.blue{color:var(--blue)}h1,h2,h3{line-height:1.08;margin-top:0}h1{font-size:clamp(2.7rem,5vw,5rem);letter-spacing:-.045em;max-width:850px;margin-bottom:24px}h1 em{font-style:normal;color:#63d4ee}.hero-copy{font-size:1.12rem;max-width:630px;color:#d9e6f2;margin:0 0 33px}.hero-actions{display:flex;gap:12px}.button{padding:14px 22px;font-size:.94rem}.button.primary{background:linear-gradient(135deg,var(--cyan),#1687cb);color:#fff;box-shadow:0 10px 28px rgba(2,177,222,.25)}.button.primary:hover{filter:brightness(1.08);transform:translateY(-1px)}.button.ghost{color:#fff;border:1px solid rgba(255,255,255,.5);background:rgba(255,255,255,.06)}.hero-proof{position:absolute;z-index:3;left:50%;bottom:0;transform:translateX(-50%);width:min(1192px,calc(100% - 48px));background:#fff;color:var(--ink);display:grid;grid-template-columns:repeat(3,1fr);border-radius:14px 14px 0 0;box-shadow:var(--shadow)}.hero-proof div{padding:24px 32px;border-right:1px solid var(--line)}.hero-proof div:last-child{border:0}.hero-proof strong,.hero-proof span{display:block}.hero-proof strong{font-size:1rem}.hero-proof span{font-size:.83rem;color:var(--muted)}.section{max-width:1240px;margin:auto;padding:110px 24px}.section-heading{max-width:720px;margin-bottom:48px}.section-heading h2,.expertise h2,.contact h2{font-size:clamp(2.1rem,3.4vw,3.4rem);letter-spacing:-.035em;margin-bottom:18px}.section-heading>p:last-child,.expertise-copy>p,.contact>div>p{color:var(--muted);font-size:1.02rem}.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.service-card{position:relative;border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px 26px;min-height:350px;display:flex;flex-direction:column;transition:.25s;background:#fff}.service-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#b8d7e8}.service-card.featured{background:var(--navy);color:#fff;border-color:var(--navy)}.service-card .number{position:absolute;right:22px;top:20px;font-size:.74rem;color:#8494a5;font-weight:800}.service-card .icon{width:50px;height:50px;border-radius:12px;background:var(--ice);color:var(--blue);display:grid;place-items:center;font-size:1.6rem;margin-bottom:34px}.service-card.featured .icon{background:rgba(255,255,255,.1);color:#69d9f2}.service-card h3{font-size:1.35rem;margin-bottom:13px}.service-card p{font-size:.92rem;color:var(--muted);margin:0 0 25px}.service-card.featured p{color:#b9cbe0}.service-card a{margin-top:auto;font-weight:800;font-size:.84rem;color:var(--blue)}.service-card.featured a{color:#62d6ef}.service-card a span{float:right;font-size:1.2rem}.expertise{background:var(--navy);color:#fff;display:grid;grid-template-columns:1fr 1fr;min-height:620px}.expertise-visual{background:linear-gradient(rgba(11,45,89,.35),rgba(11,45,89,.35)),url('assets/hero-hvac.webp') center/cover;display:flex;align-items:flex-end;padding:50px}.blueprint{display:flex;align-items:center;gap:11px;background:rgba(4,20,43,.85);padding:15px 18px;border:1px solid rgba(255,255,255,.18);border-radius:10px;backdrop-filter:blur(8px)}.blueprint span{font-size:.65rem;font-weight:800;letter-spacing:.08em}.blueprint i{width:22px;height:1px;background:#28bfe3}.expertise-copy{padding:95px clamp(35px,7vw,110px);align-self:center}.expertise-copy ul{list-style:none;padding:0;margin:28px 0}.expertise-copy li{padding:10px 0 10px 28px;position:relative;border-bottom:1px solid rgba(255,255,255,.1)}.expertise-copy li:before{content:'✓';position:absolute;left:0;color:#5ed4ef;font-weight:bold}.text-link{font-weight:800;color:#68d9f2}.text-link span{margin-left:8px}.section-heading.split{max-width:none;display:grid;grid-template-columns:1.1fr .8fr;gap:100px;align-items:end}.section-heading.split>p{margin:0 0 8px}.project-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.project{height:340px;border-radius:var(--radius);padding:28px;color:#fff;display:flex;flex-direction:column;justify-content:flex-end;position:relative;overflow:hidden;background:linear-gradient(180deg,rgba(7,29,61,.03),rgba(7,29,61,.95)),url('assets/hero-hvac.webp') center/cover}.project-b{background-position:right center}.project-c{background-position:30% center}.project span{position:absolute;top:22px;right:22px;border:1px solid rgba(255,255,255,.35);border-radius:100px;padding:4px 10px;font-size:.7rem}.project h3{font-size:1.5rem;margin:0 0 3px}.project p{margin:0;color:#b9d3e8}.contact{background:linear-gradient(135deg,#0a2b56,var(--navy));color:#fff;padding:95px max(24px,calc((100% - 1192px)/2));display:grid;grid-template-columns:.85fr 1fr;gap:100px}.contact-direct{display:flex;flex-direction:column;margin-top:34px;gap:5px}.contact-direct a{font-size:1.16rem;font-weight:800;color:#67d8f0}.contact form{background:#fff;color:var(--ink);padding:32px;border-radius:var(--radius);box-shadow:0 30px 80px rgba(0,0,0,.2)}label{display:block;font-size:.8rem;font-weight:800;margin-bottom:16px}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}input,select,textarea{width:100%;border:1px solid #cbd9e4;background:#f8fbfd;border-radius:8px;padding:12px 13px;margin-top:6px;font:inherit;color:var(--ink)}textarea{resize:vertical}input:focus,select:focus,textarea:focus{outline:3px solid rgba(8,183,223,.18);border-color:var(--cyan)}form .button{width:100%}footer{background:#04142c;color:#fff;padding:42px max(24px,calc((100% - 1192px)/2)) 20px}.footer-main{display:flex;align-items:center;gap:38px}.footer-main img{width:180px;background:#fff;border-radius:8px;padding:8px}.footer-main p{color:#a9bdd1;font-size:.86rem;margin-right:auto}.footer-main>a{font-size:.83rem;color:#75dbf2}.footer-bottom{display:flex;justify-content:space-between;border-top:1px solid rgba(255,255,255,.1);padding-top:18px;margin-top:30px;color:#829bb5;font-size:.72rem}
@media(max-width:950px){.site-header nav,.nav-cta{display:none}.menu-toggle{display:block}.site-header nav.open{display:flex;position:absolute;top:84px;left:0;right:0;background:#fff;flex-direction:column;align-items:flex-start;padding:24px;border-top:1px solid var(--line);box-shadow:0 16px 30px rgba(0,0,0,.1)}.service-grid{grid-template-columns:1fr 1fr}.expertise{grid-template-columns:1fr}.expertise-visual{min-height:460px}.contact{gap:45px}.section-heading.split{gap:35px}}
@media(max-width:680px){.site-header{height:72px}.nav-wrap{padding:0 18px}.brand{width:170px}.site-header nav.open{top:72px}.hero{min-height:760px;align-items:flex-start}.hero-media{background-position:64% center}.hero-shade{background:linear-gradient(180deg,rgba(5,22,49,.96) 0%,rgba(5,29,61,.83) 60%,rgba(5,26,55,.55) 100%)}.hero-content{padding:75px 20px 210px}.hero-copy{font-size:1rem}.hero-actions{flex-direction:column;align-items:stretch}.hero-proof{grid-template-columns:1fr;width:calc(100% - 40px)}.hero-proof div{padding:13px 20px;border-right:0;border-bottom:1px solid var(--line)}.hero-proof span{display:none}.section{padding:75px 20px}.service-grid,.section-heading.split,.project-strip,.contact{grid-template-columns:1fr}.service-card{min-height:310px}.expertise-visual{min-height:350px;padding:20px}.blueprint{flex-wrap:wrap}.expertise-copy{padding:70px 24px}.project{height:280px}.contact{padding:70px 20px;gap:35px}.form-row{grid-template-columns:1fr}.contact form{padding:24px 20px}.footer-main,.footer-bottom{align-items:flex-start;flex-direction:column;gap:16px}.footer-main p{margin:0}.footer-bottom{gap:5px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
.expertise-visual{background-image:linear-gradient(rgba(11,45,89,.28),rgba(11,45,89,.38)),url('assets/chantier-hvac.webp')}
.project{background-size:cover;background-position:center}
.project-a{background-image:linear-gradient(180deg,rgba(7,29,61,.03),rgba(7,29,61,.95)),url('assets/tertiaire.webp')}
.project-b{background-image:linear-gradient(180deg,rgba(7,29,61,.03),rgba(7,29,61,.95)),url('assets/chantier-hvac.webp');background-position:center}
.project-c{background-image:linear-gradient(180deg,rgba(7,29,61,.03),rgba(7,29,61,.95)),url('assets/installation-vrv.webp');background-position:center}
.references{background:var(--ice);padding:95px max(24px,calc((100% - 1192px)/2))}.references-heading{text-align:center;max-width:720px;margin:0 auto 45px}.references-heading .eyebrow{color:var(--blue)}.references-heading h2{font-size:clamp(2.1rem,3.4vw,3.4rem);letter-spacing:-.035em;margin-bottom:16px}.references-heading>p:last-child{color:var(--muted);margin:0}.client-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid #cbdce7;border-left:1px solid #cbdce7;background:#fff;box-shadow:0 18px 45px rgba(5,31,65,.07)}.client-name{min-height:145px;padding:24px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;border-right:1px solid #cbdce7;border-bottom:1px solid #cbdce7}.client-name strong{font-size:1.18rem;color:var(--navy);line-height:1.2}.client-name span{font-size:.78rem;color:var(--muted);margin-top:7px}.client-name:hover{background:#f7fcff}.client-name:hover strong{color:var(--blue)}
@media(max-width:900px){.client-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.references{padding:70px 20px}.client-grid{grid-template-columns:1fr 1fr}.client-name{min-height:120px;padding:16px}.client-name strong{font-size:1rem}}
.client-name img{display:block;width:auto;max-width:88%;height:58px;object-fit:contain;margin:auto auto 13px}.client-name:nth-child(7) img{height:66px}.client-name:nth-child(8) img{height:68px}@media(max-width:520px){.client-name img{height:42px;max-width:96%}.client-name:nth-child(7) img,.client-name:nth-child(8) img{height:50px}.client-name span{font-size:.7rem}}
.expertise-visual{background-color:#fff;background-image:url('assets/plan-technique.webp');background-size:contain;background-position:center;background-repeat:no-repeat}
.hero-media video{width:100%;height:100%;display:block;object-fit:cover;object-position:center 48%}
.hero{background:var(--navy)}.hero-media{inset:24px 24px 94px 62%;transform:none;background:#06162f;border:1px solid rgba(255,255,255,.18);border-radius:16px;display:grid;place-items:center;overflow:hidden;box-shadow:0 24px 55px rgba(0,0,0,.28)}.hero-media video{width:auto;height:100%;max-width:100%;object-fit:contain;object-position:center}.hero-shade{background:linear-gradient(90deg,rgba(5,22,49,.99) 0%,rgba(5,29,61,.97) 48%,rgba(5,26,55,.62) 61%,rgba(5,26,55,.08) 78%,rgba(5,26,55,.04) 100%)}
@media(max-width:950px){.hero-media{left:58%}}
@media(max-width:680px){.hero{min-height:980px}.hero-content{padding-bottom:520px}.hero-media{left:20px;right:20px;top:auto;bottom:220px;height:320px}.hero-media video{object-position:center}.hero-shade{background:linear-gradient(180deg,rgba(5,22,49,.98) 0%,rgba(5,29,61,.92) 46%,rgba(5,26,55,.18) 75%,rgba(5,26,55,.08) 100%)}}
.honeypot{position:absolute!important;left:-9999px!important;width:1px!important;height:1px!important;overflow:hidden!important}.form-privacy{font-size:.75rem;color:var(--muted);margin:0 0 16px}.form-privacy a,.footer-bottom a,.legal-content a:not(.button){text-decoration:underline;text-underline-offset:3px}.legal-page{background:#f5f9fc}.legal-content{max-width:880px;margin:0 auto;padding:72px 24px 100px}.legal-content h1{color:var(--navy);font-size:clamp(2.5rem,5vw,4.5rem);margin-bottom:42px}.legal-content h2{color:var(--navy);font-size:1.45rem;margin:38px 0 12px}.legal-content p{color:#40536b}.thanks{max-width:720px;min-height:100vh;margin:auto;padding:80px 24px;display:flex;flex-direction:column;align-items:flex-start;justify-content:center}.thanks img{width:240px;margin-bottom:55px}.thanks h1{color:var(--navy);font-size:clamp(2.5rem,5vw,4.5rem);margin-bottom:18px}.thanks p:not(.eyebrow){color:var(--muted);font-size:1.08rem;margin-bottom:28px}a:focus-visible,button:focus-visible{outline:3px solid var(--cyan);outline-offset:4px}
@media(prefers-reduced-motion:reduce){.hero-media video{display:none}.hero-media{background:url('assets/timelapse-chantier-poster.webp') center/contain no-repeat #06162f}}
.footer-main img,.thanks img{height:auto}