/* Layout: sticky header; navy hero over sedimentary strata; products as spec sheets; sectors grid; ordering steps; references; ultrafine pre-booking band; quote form; FAQ; footer */
:root{
  --navy:#0D2B5C; --navy-2:#17396F; --amber:#E3A23F; --amber-ink:#8A5A1F;
  --bg:#FFFFFF; --stone:#F2F4F7; --line:#DCE2EA; --ink:#17233A; --muted:#55627A;
  --display:"Archivo","Arial Narrow",Arial,sans-serif; --body:"Source Sans 3","Segoe UI",Arial,sans-serif;
  --wrap:1180px; --r:12px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);font-size:17px;line-height:1.6}
h1,h2,h3{font-family:var(--display);line-height:1.15;margin:0;text-wrap:balance;letter-spacing:-.01em}
p{margin:0}
a{color:var(--navy)}
img{max-width:100%}
.wrap{max-width:var(--wrap);margin:0 auto;padding-inline:20px}
.eyebrow{font-size:13px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--amber-ink)}
.on-dark .eyebrow{color:var(--amber)}
section{padding-block:80px}
.sec-head{display:flex;flex-direction:column;gap:10px;max-width:720px;margin-bottom:40px}
.sec-head h2{font-size:clamp(28px,4vw,40px);color:var(--navy)}
.sec-head p{color:var(--muted);font-size:18px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 22px;border-radius:999px;font-weight:700;text-decoration:none;border:2px solid transparent;font-size:16px;cursor:pointer;font-family:var(--body)}
.btn.amber{background:var(--amber);color:var(--navy)}
.btn.amber:hover{background:#f0b45a}
.btn.ghost{border-color:rgba(255,255,255,.5);color:#fff}
.btn.ghost:hover{border-color:#fff}
.btn.navy{background:var(--navy);color:#fff}
:focus-visible{outline:3px solid var(--amber);outline-offset:2px}

/* header */
.hdr{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:saturate(1.2) blur(6px);border-bottom:1px solid var(--line)}
.hdr .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:72px}
.logo img{height:46px;display:block}
.nav{display:flex;gap:26px;align-items:center}
.nav a{text-decoration:none;color:var(--ink);font-weight:600;font-size:15px}
.nav a:hover{color:var(--amber-ink)}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:8px 12px;font-weight:700;font-family:var(--body)}
#menu{display:none}
@media (max-width:900px){
  .nav{position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;align-items:flex-start;gap:0;padding:8px 20px 16px;border-bottom:1px solid var(--line);display:none}
  .nav a{padding:10px 0;width:100%}
  .menu-btn{display:inline-block}
  #menu:checked ~ .nav{display:flex}
}

/* hero */
.hero{position:relative;background:var(--navy);color:#fff;overflow:hidden;padding-block:88px 72px}
.hero::before{content:"";position:absolute;inset:0;background:url(/assets/strates.jpg) center/cover no-repeat;opacity:.55}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,var(--navy) 35%,rgba(13,43,92,.55) 70%,rgba(13,43,92,.2))}
.hero .wrap{position:relative;z-index:1;display:grid;grid-template-columns:1.25fr .75fr;gap:48px;align-items:end}
@media (max-width:900px){.hero .wrap{grid-template-columns:1fr}}
.hero h1{font-size:clamp(36px,5.4vw,60px);font-weight:800;margin:14px 0 18px}
.hero h1 em{font-style:normal;color:var(--amber)}
.hero p.lead{font-size:20px;max-width:560px;color:#DCE5F3}
.hero .ctas{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.facts{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:rgba(255,255,255,.18);border-radius:var(--r);overflow:hidden}
.fact{background:rgba(13,43,92,.88);padding:18px}
.fact b{display:block;font-family:var(--display);font-size:30px;color:var(--amber);font-variant-numeric:tabular-nums}
.fact span{font-size:14px;color:#DCE5F3}
.fact b{white-space:nowrap}
@media (max-width:560px){.fact b{font-size:22px}}

/* why */
.why{display:grid;grid-template-columns:repeat(2,1fr);gap:28px 48px;max-width:960px}
@media (max-width:560px){.why{grid-template-columns:1fr}}
.why div{display:flex;flex-direction:column;gap:8px}
.why h3{font-size:20px;color:var(--navy)}
.why p{color:var(--muted)}
.ico{width:44px;height:44px;border-radius:50%;background:var(--navy);display:grid;place-items:center}
.ico svg{width:22px;height:22px;stroke:var(--amber);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

/* products */
.products{background:var(--stone)}
.pgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
@media (max-width:820px){.pgrid{grid-template-columns:1fr}}
.prod{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:26px;display:flex;flex-direction:column;gap:14px;min-width:0}
.prod header{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}
.prod h3{font-size:24px;color:var(--navy)}
.badge{font-size:13px;font-weight:700;padding:4px 12px;border-radius:999px;white-space:nowrap}
.badge.ok{background:#DCEFE5;color:#1F6B4A}.badge.soon{background:#FBEBD0;color:var(--amber-ink)}.badge.later{background:#E6EAF1;color:var(--muted)}
.spec{width:100%;border-collapse:collapse;font-size:15px}
.spec th{text-align:left;color:var(--muted);font-weight:600;padding:7px 0;border-bottom:1px solid var(--line);width:42%}
.spec td{padding:7px 0;border-bottom:1px solid var(--line);font-weight:600}
.prod p{color:var(--muted)}
.prod .ph{margin:-26px -26px 0;aspect-ratio:16/9;overflow:hidden;border-radius:var(--r) var(--r) 0 0;background:var(--stone)}
.prod .ph img{width:100%;height:100%;object-fit:cover;display:block}
.prod .more{margin-top:auto;font-weight:700;text-decoration:none;color:var(--navy)}
.prod .more:hover{color:var(--amber-ink)}
.note{font-size:14px;color:var(--muted);margin-top:18px}

/* sectors */
.sgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
@media (max-width:900px){.sgrid{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.sgrid{grid-template-columns:1fr}}
.sgrid div{background:#fff;padding:22px;display:flex;flex-direction:column;gap:6px}
.sgrid h3{font-size:18px;color:var(--navy)}
.sgrid p{font-size:15px;color:var(--muted)}
.sgrid .pr{font-size:13px;font-weight:700;color:var(--amber-ink);text-transform:uppercase;letter-spacing:.06em}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:st}
@media (max-width:900px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.steps{grid-template-columns:1fr}}
.step{border-top:3px solid var(--navy);padding-top:16px;display:flex;flex-direction:column;gap:6px}
.step::before{counter-increment:st;content:"Étape " counter(st);font-size:13px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--amber-ink)}
.step h3{font-size:19px;color:var(--navy)}
.step p{color:var(--muted);font-size:15px}

/* ultrafin band */
.band{background:var(--navy);color:#fff}
.band .wrap{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center}
@media (max-width:900px){.band .wrap{grid-template-columns:1fr}}
.band h2{font-size:clamp(28px,4vw,40px)}
.band p{color:#DCE5F3;margin-top:12px}
.band ul{margin:16px 0 0;padding-left:20px;color:#DCE5F3}
.band .big{font-family:var(--display);font-size:clamp(48px,7vw,78px);color:var(--amber);line-height:1}
.band .big small{display:block;font-family:var(--body);font-size:16px;color:#DCE5F3;margin-top:8px}

/* references */
.refs{display:flex;flex-wrap:wrap;gap:12px}
.refs span{border:1px solid var(--line);border-radius:999px;padding:10px 20px;font-family:var(--display);font-weight:700;color:var(--navy)}
.sites{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center}
@media (max-width:820px){.sites{grid-template-columns:1fr}}
.sites figure{margin:0;display:flex;flex-direction:column;gap:8px;max-width:460px}
.sites img{width:100%;height:auto;border-radius:var(--r);display:block;background:var(--stone)}
.sites figcaption{font-size:14px;color:var(--muted)}
.commit{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:40px}
@media (max-width:820px){.commit{grid-template-columns:1fr}}
.commit div{background:var(--stone);border-radius:var(--r);padding:22px}
.commit b{font-family:var(--display);font-size:28px;color:var(--navy);display:block}
.commit span{color:var(--muted);font-size:15px}

/* investisseurs */
.inv{background:var(--navy);color:#fff}
.inv .sec-head h2{color:#fff}
.inv .sec-head p{color:#DCE5F3}
.inv-why{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:rgba(255,255,255,.18);border-radius:var(--r);overflow:hidden}
@media (max-width:820px){.inv-why{grid-template-columns:1fr}}
.inv-why div{background:var(--navy-2);padding:24px;display:flex;flex-direction:column;gap:8px}
.inv-why b{font-family:var(--display);font-size:30px;color:var(--amber);line-height:1.1}
.inv-why h3{font-size:19px}
.inv-why p,.inv-forms p{color:#DCE5F3;font-size:15px}
.inv-sub{font-size:22px;margin:44px 0 18px}
.inv-forms{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media (max-width:820px){.inv-forms{grid-template-columns:1fr}}
.inv-forms div{border-top:3px solid var(--amber);padding-top:14px;display:flex;flex-direction:column;gap:6px}
.inv-forms h4{margin:0;font-family:var(--display);font-size:18px}
.inv-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:36px}
.inv-note{font-size:14px;color:#A9B8D2;margin-top:14px}

/* quote */
.quote{background:var(--stone)}
.qgrid{display:grid;grid-template-columns:.9fr 1.1fr;gap:40px}
@media (max-width:900px){.qgrid{grid-template-columns:1fr}}
.contact-list{display:flex;flex-direction:column;gap:16px;margin-top:24px}
.contact-list div{display:flex;flex-direction:column}
.contact-list small{font-size:13px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--amber-ink)}
.contact-list a,.contact-list span{font-size:18px;font-weight:600;color:var(--ink);text-decoration:none}
form{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:26px;display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:560px){form{grid-template-columns:1fr}}
.fld{display:flex;flex-direction:column;gap:5px;min-width:0}
.fld.full{grid-column:1/-1}
.fld label{font-size:14px;font-weight:700}
.fld input,.fld select,.fld textarea{font:inherit;font-size:16px;padding:11px 12px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);width:100%}
.fld textarea{min-height:96px;resize:vertical}
form .btn{justify-self:start}
.form-note{grid-column:1/-1;font-size:14px;color:var(--muted)}

/* faq */
details{border-bottom:1px solid var(--line);padding:18px 0}
summary{font-family:var(--display);font-weight:700;font-size:19px;color:var(--navy);cursor:pointer}
details p{margin-top:10px;color:var(--muted);max-width:760px}

/* footer */
footer{background:#0A1F44;color:#C5D1E6;padding-block:48px 28px;font-size:15px}
footer .cols{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:28px}
@media (max-width:820px){footer .cols{grid-template-columns:1fr 1fr}}
@media (max-width:480px){footer .cols{grid-template-columns:1fr}}
footer h3{font-size:15px;color:#fff;margin-bottom:10px;font-family:var(--body);letter-spacing:.08em;text-transform:uppercase}
footer a{color:#C5D1E6;text-decoration:none;display:block;padding:3px 0}
footer a:hover{color:var(--amber)}
footer .legal{border-top:1px solid rgba(255,255,255,.15);margin-top:32px;padding-top:18px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px}
.wa{position:fixed;right:18px;bottom:18px;z-index:60;background:#1F9D55;color:#fff;border-radius:999px;padding:12px 18px;font-weight:700;text-decoration:none;box-shadow:0 6px 20px rgba(0,0,0,.2)}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* ---------- Pages intérieures (produits, blog) ---------- */
.page-hero{background:var(--navy);color:#fff;padding-block:56px 48px}
.page-hero .eyebrow{color:var(--amber)}
.page-hero h1{font-size:clamp(32px,4.6vw,50px);font-weight:800;margin:12px 0 14px;max-width:860px}
.page-hero p.lead{font-size:19px;color:#DCE5F3;max-width:720px}
.page-hero .ctas{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.crumbs{font-size:14px;color:#A9B8D2;display:flex;gap:8px;flex-wrap:wrap}
.crumbs a{color:#DCE5F3;text-decoration:none}
.crumbs a:hover{color:var(--amber)}
.split{display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:start}
@media (max-width:860px){.split{grid-template-columns:1fr}}
.split img{width:100%;height:auto;border-radius:var(--r);display:block}
.prose{max-width:760px}
.prose h2{font-size:clamp(24px,3vw,30px);color:var(--navy);margin:40px 0 12px}
.prose h3{font-size:20px;color:var(--navy);margin:28px 0 8px}
.prose p{margin:0 0 14px;color:var(--ink)}
.prose ul{margin:0 0 16px;padding-left:22px}
.prose li{margin-bottom:6px}
.prose .spec{margin:8px 0 20px}
.callout{background:var(--stone);border-left:4px solid var(--amber);border-radius:8px;padding:16px 18px;margin:20px 0;color:var(--ink)}
.cta-band{background:var(--stone)}
.cta-band .wrap{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.cta-band h2{font-size:clamp(24px,3vw,32px);color:var(--navy)}
.cta-band p{color:var(--muted);margin-top:6px}
.cta-band .ctas{display:flex;gap:12px;flex-wrap:wrap}
.btn.line{border-color:var(--line);color:var(--navy)}
.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
@media (max-width:820px){.cards{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px;display:flex;flex-direction:column;gap:10px;text-decoration:none;color:var(--ink)}
.card:hover{border-color:var(--navy)}
.card .meta{font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--amber-ink)}
.card h2,.card h3{font-size:22px;color:var(--navy)}
.card p{color:var(--muted);font-size:16px}
.card .more{margin-top:auto;font-weight:700;color:var(--navy)}
.article-meta{font-size:15px;color:#A9B8D2;margin-top:6px}
.related{margin-top:48px;border-top:1px solid var(--line);padding-top:24px}
.related h2{margin-top:0}