:root{
  --teal:#059e99; --teal-dark:#047875; --ink:#17252d; --ink2:#21343e; --muted:#64747d;
  --paper:#f6f9f9; --white:#fff; --line:#dfe8e8; --shadow:0 18px 45px rgba(18,45,55,.10);
  --radius:22px; --max:1180px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.55}a{color:inherit}img{max-width:100%;display:block}.container{width:min(var(--max),calc(100% - 40px));margin:auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);backdrop-filter:blur(12px);border-bottom:1px solid rgba(15,83,85,.08)}.nav-wrap{height:92px;display:flex;align-items:center;justify-content:space-between;gap:30px}.brand{width:270px;height:74px;display:flex;align-items:center}.brand img{width:100%;height:auto;object-fit:contain;display:block}.main-nav{display:flex;align-items:center;gap:28px}.main-nav a{text-decoration:none;text-transform:uppercase;font-size:12px;font-weight:700;letter-spacing:.055em}.main-nav a:not(.nav-cta):hover{color:var(--teal)}.nav-cta{background:var(--teal);color:#fff;padding:13px 17px;border-radius:9px}.menu-toggle{display:none;background:none;border:0;padding:8px}.menu-toggle span{display:block;width:26px;height:2px;background:var(--ink);margin:5px 0}
.hero{min-height:650px;position:relative;color:#fff;display:flex;align-items:center;overflow:hidden}.hero-media{position:absolute;inset:0;display:grid;grid-template-columns:1.2fr 1fr .9fr}.hero-img{background-size:cover;background-position:center}.img-structure{background-image:url('assets/structure.jpg')}.img-pipe{background-image:url('assets/tuyauterie.jpg')}.img-tank{background-image:url('assets/chaudronnerie.jpg')}.hero-overlay{position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,31,41,.94) 0%,rgba(10,31,41,.82) 35%,rgba(10,31,41,.35) 68%,rgba(10,31,41,.22) 100%)}.hero-content{position:relative;z-index:2;padding:72px 0}.eyebrow{text-transform:uppercase;letter-spacing:.18em;font-weight:800;font-size:12px;color:#7fe2df;margin:0 0 16px}.eyebrow.dark{color:var(--teal)}.hero h1{font-size:clamp(48px,6vw,78px);line-height:.98;margin:0;max-width:760px;letter-spacing:-.045em}.hero h1 span{color:#a5f0ed}.hero-lead{font-size:21px;max-width:660px;margin:28px 0;color:#e9f2f3}.hero-actions{display:flex;gap:12px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;padding:15px 20px;border-radius:10px;font-weight:800;text-decoration:none}.btn-primary{background:var(--teal);color:#fff}.btn-ghost{border:1px solid rgba(255,255,255,.5);color:#fff}.hero-proof{display:flex;gap:42px;margin-top:48px}.hero-proof div{display:grid}.hero-proof strong{font-size:25px}.hero-proof span{font-size:12px;color:#d5e1e4;text-transform:uppercase;letter-spacing:.08em}
.trust-strip{background:#fff;border-bottom:1px solid var(--line)}.trust-grid{display:grid;grid-template-columns:repeat(3,1fr);padding:26px 0}.trust-grid>div{display:flex;gap:14px;padding:4px 28px;border-right:1px solid var(--line)}.trust-grid>div:first-child{padding-left:0}.trust-grid>div:last-child{border:0}.trust-grid p{margin:0;font-size:13px;color:var(--muted)}.trust-grid strong{color:var(--ink)}.trust-icon{font-size:24px;color:var(--teal)}
.section{padding:100px 0}.section-head{max-width:760px;margin-bottom:45px}.section-head.center{text-align:center;margin-left:auto;margin-right:auto}.section-head.compact{margin-bottom:34px}.section-head h2,.section-dark h2,.contact-section h2,.toolbox h2{font-size:clamp(34px,4.5vw,52px);line-height:1.08;letter-spacing:-.035em;margin:0 0 18px}.section-head p{color:var(--muted);font-size:17px}.expertise-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}.expertise-card{border:1px solid var(--line);border-radius:var(--radius);padding:30px;background:#fff;box-shadow:0 4px 20px rgba(25,60,70,.04);position:relative;overflow:hidden}.expertise-card:after{content:"";position:absolute;right:-20px;bottom:-30px;width:190px;height:190px;background:radial-gradient(circle,var(--teal) 0,transparent 67%);opacity:.05}.card-top{display:flex;gap:18px;align-items:flex-start}.card-top span{color:var(--teal);font-weight:900;font-size:14px}.expertise-card h3{margin:0;font-size:24px}.expertise-card p{color:var(--muted)}.expertise-card ul{padding-left:19px;margin-bottom:0}.expertise-card li{margin:7px 0}.card-pressure{border-top:4px solid var(--teal)}.card-pipe{border-top:4px solid #318ba8}.card-structure{border-top:4px solid #607786}.card-fea{border-top:4px solid #405d69}
.section-dark{background:var(--ink);color:#fff}.approach-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:90px;align-items:start}.big-copy{font-size:19px;color:#b8c8ce;max-width:500px}.process{border-top:1px solid rgba(255,255,255,.15)}.process>div{display:grid;grid-template-columns:70px 1fr;gap:10px;padding:22px 0;border-bottom:1px solid rgba(255,255,255,.15)}.process b{color:#70d9d5;font-size:13px}.process h3{margin:0 0 5px;font-size:20px}.process p{margin:0;color:#aebec4}
.codes{background:var(--paper)}.code-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.code-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;min-height:130px}.code-card small{display:block;color:var(--teal);text-transform:uppercase;letter-spacing:.08em;font-weight:800;margin-bottom:12px}.code-card strong{font-size:18px;line-height:1.3}.reg-note{margin:22px 0 0;color:var(--muted);font-size:13px}
.refs-section{padding-top:88px}.logo-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.logo-grid a{height:115px;border:1px solid var(--line);border-radius:15px;background:#fff;display:flex;align-items:center;justify-content:center;padding:24px;transition:.2s;box-shadow:0 4px 15px rgba(20,55,65,.03)}.logo-grid a:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#b9d7d6}.logo-grid img{max-height:55px;max-width:90%}
.toolbox{background:#f5f8f8}.toolbox-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:80px}.toolbox-layout>div:first-child p:last-child{color:var(--muted)}.tool-links{display:grid;gap:10px}.tool-links a{display:grid;grid-template-columns:44px 1fr 28px;gap:16px;align-items:center;text-decoration:none;background:#fff;border:1px solid var(--line);padding:18px 20px;border-radius:14px}.tool-links a:hover{border-color:#9dccca}.tool-links span{color:var(--teal);font-weight:900}.tool-links div{display:grid}.tool-links small{color:var(--muted)}.tool-links b{font-size:20px;color:var(--teal)}
.contact-section{padding:92px 0;background:linear-gradient(135deg,#047d79,#08a39d);color:#fff}.contact-layout{display:grid;grid-template-columns:1.2fr .8fr;gap:65px;align-items:center}.contact-copy>p:not(.eyebrow){font-size:18px;color:#d8f4f3;max-width:690px}.contact-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:28px}.btn-light{background:#fff;color:var(--teal-dark)}.btn-outline-light{border:1px solid rgba(255,255,255,.65);color:#fff}.contact-card{background:#fff;color:var(--ink);border-radius:22px;padding:30px;box-shadow:0 20px 50px rgba(0,0,0,.12)}.contact-card h3{margin-top:0;font-size:25px}.contact-card dl{margin:0}.contact-card dl div{padding:14px 0;border-bottom:1px solid var(--line)}.contact-card dt{text-transform:uppercase;font-size:11px;letter-spacing:.1em;color:var(--teal);font-weight:800}.contact-card dd{margin:4px 0 0}.contact-card a{text-decoration:none}.small-note{font-size:12px;color:var(--muted);margin:18px 0 0}
footer{background:#111e24;color:#b5c2c7;padding:25px 0}.footer-wrap{display:grid;grid-template-columns:1fr auto auto;gap:28px;align-items:center;font-size:12px}.footer-wrap>div:first-child{display:grid}.footer-wrap strong{color:#fff}.footer-wrap a{color:#fff;text-decoration:none}.legal{text-align:center}
@media(max-width:920px){.nav-wrap{height:78px}.brand{width:220px;height:60px}.menu-toggle{display:block}.main-nav{position:absolute;left:0;right:0;top:78px;background:#fff;display:none;flex-direction:column;align-items:stretch;padding:20px 26px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}.main-nav.open{display:flex}.main-nav a{padding:8px 0}.nav-cta{text-align:center;margin-top:4px}.hero{min-height:620px}.hero-media{grid-template-columns:1fr}.hero-media .img-pipe,.hero-media .img-tank{display:none}.hero-overlay{background:linear-gradient(90deg,rgba(10,31,41,.93),rgba(10,31,41,.55))}.trust-grid{grid-template-columns:1fr}.trust-grid>div{border-right:0;border-bottom:1px solid var(--line);padding:15px 0}.trust-grid>div:last-child{border-bottom:0}.expertise-grid,.approach-layout,.contact-layout,.toolbox-layout{grid-template-columns:1fr}.approach-layout,.toolbox-layout{gap:45px}.code-grid{grid-template-columns:repeat(2,1fr)}.logo-grid{grid-template-columns:repeat(2,1fr)}.footer-wrap{grid-template-columns:1fr;text-align:center}.footer-wrap>div:first-child{justify-items:center}}
@media(max-width:580px){.container{width:min(100% - 28px,var(--max))}.hero{min-height:670px}.hero-content{padding:55px 0}.hero h1{font-size:47px}.hero-lead{font-size:18px}.hero-actions{display:grid}.hero-proof{gap:20px;justify-content:space-between}.hero-proof span{font-size:10px}.section{padding:72px 0}.expertise-grid,.code-grid,.logo-grid{grid-template-columns:1fr}.logo-grid a{height:100px}.section-head h2,.section-dark h2,.contact-section h2,.toolbox h2{font-size:36px}.expertise-card{padding:24px}.process>div{grid-template-columns:52px 1fr}.contact-card{padding:24px}.footer-wrap{font-size:11px}}