/* FENÊTRES 3DEVIS — feuille de style
   Palette : Nuit #13233A · Blanc #FFFFFF · Alu #9AA3AD · Calcaire #EEF0EC · Molasse #5E6B6A · Verre #D5E4EA */
@font-face{font-family:"Archivo";src:url("/assets/archivo.woff2") format("woff2-variations"),url("/assets/archivo.woff2") format("woff2");font-weight:100 900;font-stretch:62% 125%;font-display:swap}
:root{
  --nuit:#13233A;--nuit-2:#1E3352;--blanc:#FFFFFF;--alu:#9AA3AD;--alu-clair:#C9CED3;
  --calcaire:#EEF0EC;--molasse:#5E6B6A;--verre:#D5E4EA;--verre-2:#B9D0D9;
  --texte:#1A2433;--texte-2:#4A5562;--ligne:#D9DDE0;--fond:#FFFFFF;--fond-2:#F6F7F5;
  --ok:#2F6B4F;--err:#A33A2B;
  --mesure:1180px;--pas:clamp(1rem,2.5vw,1.5rem);
  --f:"Archivo",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}
body{margin:0;font-family:var(--f);font-size:1.0625rem;line-height:1.62;color:var(--texte);background:var(--fond);font-feature-settings:"tnum" 0}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--nuit);text-decoration-thickness:1px;text-underline-offset:.18em}
a:hover{color:var(--molasse)}
:focus-visible{outline:3px solid #3B7EA1;outline-offset:2px}
.sr{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:0;background:var(--nuit);color:#fff;padding:.6rem 1rem;z-index:99}
.skip:focus{left:1rem}
.wrap{max-width:var(--mesure);margin:0 auto;padding:0 var(--pas)}
h1,h2,h3{font-family:var(--f);color:var(--nuit);line-height:1.12;margin:0 0 .6em;letter-spacing:-.01em}
h1{font-size:clamp(2.1rem,5.2vw,3.7rem);font-weight:640;font-stretch:118%}
h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:620;font-stretch:112%;margin-top:2.2em}
h3{font-size:1.18rem;font-weight:650;font-stretch:104%;margin-top:1.6em}
p,ul,ol{margin:0 0 1.05em}
.prose{max-width:72ch}
.prose li{margin-bottom:.35em}
.lead{font-size:1.2rem;color:var(--texte-2);max-width:62ch}
.num{font-feature-settings:"tnum" 1}
/* En-tête */
.hd{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(--ligne)}
.hd .wrap{display:flex;align-items:center;gap:1.5rem;min-height:72px}
.logo{display:flex;align-items:center;gap:.6rem;text-decoration:none;color:var(--nuit);flex-shrink:0}
.logo svg{width:38px;height:38px}
.logo span{font-weight:700;font-stretch:122%;letter-spacing:.04em;font-size:1rem;line-height:1}
.logo span b{font-weight:400;color:var(--molasse)}
.nav{display:flex;gap:.2rem;margin-left:auto;align-items:center}
.nav>div{position:relative}
.nav button,.nav>a:not(.btn){font:inherit;font-size:.95rem;font-weight:550;background:none;border:0;color:var(--nuit);padding:.55rem .6rem;cursor:pointer;text-decoration:none;border-radius:2px;white-space:nowrap}
.nav>a.btn{margin-left:.6rem;white-space:nowrap}
.nav button::after{content:"";display:inline-block;width:.42em;height:.42em;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg) translate(-2px,-2px);margin-left:.45em}
.nav button[aria-expanded=true]{background:var(--calcaire)}
.menu{position:absolute;top:calc(100% + 6px);left:0;min-width:270px;background:#fff;border:1px solid var(--ligne);box-shadow:0 18px 40px -18px rgba(19,35,58,.35);padding:.6rem;display:none}
.menu.open{display:block}
.menu a{display:block;padding:.5rem .7rem;text-decoration:none;font-size:.95rem;border-left:2px solid transparent}
.menu a:hover{background:var(--fond-2);border-left-color:var(--alu)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;font:inherit;font-weight:620;font-stretch:108%;text-decoration:none;padding:.85rem 1.35rem;border:1.5px solid var(--nuit);border-radius:2px;cursor:pointer;line-height:1.2;text-align:center}
.btn-p{background:var(--nuit);color:#fff}
.btn-p:hover{background:var(--nuit-2);color:#fff}
.btn-s{background:transparent;color:var(--nuit)}
.btn-s:hover{background:var(--calcaire);color:var(--nuit)}
.hd .btn{padding:.6rem 1rem;font-size:.92rem;color:#fff}
.burger{display:none;margin-left:auto;background:none;border:1.5px solid var(--nuit);border-radius:2px;width:44px;height:44px;cursor:pointer}
.burger span,.burger span::before,.burger span::after{display:block;width:20px;height:1.5px;background:var(--nuit);margin:auto;position:relative}
.burger span::before{content:"";position:absolute;top:-6px}.burger span::after{content:"";position:absolute;top:6px}
@media (max-width:1180px){
  .burger{display:block}
  .nav{display:none;position:fixed;inset:72px 0 0 0;background:#fff;flex-direction:column;align-items:stretch;padding:1rem var(--pas) 2rem;overflow-y:auto;gap:0}
  .nav.open{display:flex}
  .nav>div{border-bottom:1px solid var(--ligne)}
  .nav button{width:100%;text-align:left;padding:1rem .2rem;font-size:1.05rem;display:flex;justify-content:space-between;align-items:center}
  .menu{position:static;box-shadow:none;border:0;padding:0 0 .8rem}
  .nav .btn{margin-top:1.2rem}
}
/* Fil d'Ariane */
.crumbs{font-size:.88rem;color:var(--texte-2);padding:1.1rem 0 0}
.crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:.3rem}
.crumbs li+li::before{content:"/";margin-right:.3rem;color:var(--alu)}
.crumbs a{color:var(--texte-2)}
/* Hero accueil */
.hero{position:relative;background:var(--nuit);color:#fff;overflow:hidden}
.hero .wrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:2.5rem;align-items:center;padding-top:clamp(2.5rem,6vw,5rem);padding-bottom:clamp(2.5rem,6vw,5rem)}
.hero h1{color:#fff;font-size:clamp(2.2rem,5.4vw,4rem)}
.hero p.lead{color:#D6DEE6}
.hero .acts{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:1.6rem}
.hero .btn-p{background:#fff;color:var(--nuit);border-color:#fff}
.hero .btn-p:hover{background:var(--verre);color:var(--nuit)}
.hero .btn-s{color:#fff;border-color:rgba(255,255,255,.6)}
.hero .btn-s:hover{background:rgba(255,255,255,.08);color:#fff}
.hero-visu{position:relative;aspect-ratio:16/11;border:1px solid rgba(255,255,255,.18)}
.hero-visu svg,.hero-visu img{width:100%;height:100%;object-fit:cover}
.sash{transform-origin:0 50%;animation:ouvre 1.6s cubic-bezier(.3,.7,.2,1) .3s both}
@keyframes ouvre{from{transform:scaleX(1);opacity:.0}to{transform:scaleX(1);opacity:1}}
.glow{animation:lum 2.2s ease .6s both}
@keyframes lum{from{opacity:0}to{opacity:1}}
.slogan{font-stretch:112%;font-weight:450;color:var(--alu-clair);font-size:1.02rem;margin:0 0 1.4rem;border-left:2px solid var(--alu);padding-left:.8rem}
@media (max-width:860px){.hero .wrap{grid-template-columns:1fr}}
/* En-tête de page interne */
.ph{background:var(--fond-2);border-bottom:1px solid var(--ligne)}
.ph .wrap{padding-bottom:clamp(1.8rem,4vw,3rem)}
.ph h1{margin-top:1rem;max-width:22ch}
.ph .acts{margin-top:1.4rem;display:flex;flex-wrap:wrap;gap:.8rem}
/* Corps */
.body{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:3.5rem;padding-top:2rem;padding-bottom:4rem}
.body>article>h2:first-child{margin-top:.6em}
@media (max-width:980px){.body{grid-template-columns:minmax(0,1fr);gap:2rem}}
aside .box{position:sticky;top:96px;border:1px solid var(--ligne);padding:1.4rem;background:#fff}
aside .box h2{font-size:1.15rem;margin:0 0 .6rem}
aside .box p{font-size:.95rem;color:var(--texte-2)}
aside .box .btn{width:100%}
aside .rel{margin-top:1.4rem;font-size:.95rem}
aside .rel h3{font-size:.98rem;margin:0 0 .5rem}
aside .rel ul{list-style:none;padding:0;margin:0}
aside .rel li{border-top:1px solid var(--ligne)}
aside .rel a{display:block;padding:.5rem 0;text-decoration:none}
/* Tableaux */
.tbl{overflow-x:auto;margin:1.2rem 0 1.6rem;border:1px solid var(--ligne)}
table{border-collapse:collapse;width:100%;font-size:.96rem;min-width:540px;font-feature-settings:"tnum" 1}
th,td{text-align:left;padding:.7rem .85rem;border-bottom:1px solid var(--ligne);vertical-align:top}
thead th{background:var(--nuit);color:#fff;font-weight:600;font-stretch:106%}
tbody th{font-weight:620;color:var(--nuit);background:var(--fond-2)}
tbody tr:last-child>*{border-bottom:0}
caption{caption-side:bottom;text-align:left;font-size:.85rem;color:var(--texte-2);padding:.6rem .85rem}
/* Encadrés */
.note{border-left:3px solid var(--alu);background:var(--fond-2);padding:1rem 1.2rem;margin:1.4rem 0;max-width:72ch}
.note p:last-child{margin:0}
.note.warn{border-left-color:var(--molasse)}
.fig{margin:1.6rem 0;border:1px solid var(--ligne);background:#fff;padding:1rem}
.fig figcaption{font-size:.88rem;color:var(--texte-2);margin-top:.6rem}
/* FAQ */
.faq details{border-top:1px solid var(--ligne);padding:.2rem 0}
.faq details:last-child{border-bottom:1px solid var(--ligne)}
.faq summary{cursor:pointer;font-weight:620;color:var(--nuit);padding:.9rem 2rem .9rem 0;list-style:none;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:.2rem;top:.75rem;font-size:1.3rem;font-weight:400;color:var(--molasse)}
.faq details[open] summary::after{content:"−"}
.faq details>div{padding:0 0 1rem;max-width:70ch}
/* Grille matériaux (accueil) — profilés en coupe */
.sect{padding:clamp(3rem,7vw,5.5rem) 0}
.sect.alt{background:var(--fond-2)}
.sect>.wrap>h2:first-child{margin-top:0}
.mat{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:2px solid var(--nuit);margin-top:2rem}
.mat a{display:block;padding:1.4rem 1.2rem 1.6rem;text-decoration:none;color:inherit;border-right:1px solid var(--ligne)}
.mat a:last-child{border-right:0}
.mat a:hover{background:var(--calcaire)}
.mat svg{width:100%;max-width:150px;height:auto;margin-bottom:1rem}
.mat h3{margin:0 0 .4rem}
.mat p{font-size:.95rem;color:var(--texte-2);margin:0}
@media (max-width:900px){.mat{grid-template-columns:repeat(2,minmax(0,1fr))}.mat a:nth-child(2){border-right:0}.mat a:nth-child(-n+2){border-bottom:1px solid var(--ligne)}}
@media (max-width:520px){.mat{grid-template-columns:1fr}.mat a{border-right:0;border-bottom:1px solid var(--ligne)}}
.steps{counter-reset:s;list-style:none;padding:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;margin:2rem 0 0;border-top:1px solid var(--ligne)}
.steps li{counter-increment:s;padding:1.4rem 1.2rem 0 0}
.steps li::before{content:counter(s);display:flex;width:2.2rem;height:2.2rem;border:1.5px solid var(--nuit);align-items:center;justify-content:center;font-weight:650;margin-bottom:.9rem}
.steps h3{margin:0 0 .4rem;font-size:1.05rem}
.steps p{font-size:.95rem;color:var(--texte-2)}
@media (max-width:860px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.steps{grid-template-columns:1fr}}
.cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:2.2rem;margin-top:1.6rem}
.cols h3{margin-top:0}
.cols p{color:var(--texte-2);font-size:.98rem}
@media (max-width:860px){.cols{grid-template-columns:1fr}}
.linklist{columns:3 220px;column-gap:2rem;padding:0;list-style:none;margin:1.2rem 0}
.linklist li{break-inside:avoid;border-top:1px solid var(--ligne)}
.linklist a{display:block;padding:.55rem 0;text-decoration:none}
.band{background:var(--nuit);color:#fff;padding:clamp(2.5rem,6vw,4rem) 0}
.band h2{color:#fff;margin-top:0}
.band p{color:#D6DEE6;max-width:60ch}
.band .btn-p{background:#fff;color:var(--nuit);border-color:#fff}
/* Formulaires */
.form{max-width:760px}
.prog{display:flex;gap:4px;margin:0 0 1.4rem}
.prog i{flex:1;height:4px;background:var(--ligne)}
.prog i.on{background:var(--nuit)}
.step-t{font-size:.92rem;color:var(--texte-2);margin-bottom:.4rem}
fieldset{border:0;padding:0;margin:0 0 1.6rem}
legend{font-weight:650;color:var(--nuit);font-size:1.05rem;margin-bottom:.6rem;padding:0}
label{display:block;font-weight:560;margin:0 0 .35rem}
.f{margin-bottom:1.15rem}
.f small{display:block;color:var(--texte-2);font-size:.86rem;margin-top:.3rem}
input[type=text],input[type=email],input[type=tel],input[type=number],select,textarea{width:100%;font:inherit;font-size:1rem;padding:.75rem .8rem;border:1.5px solid var(--alu-clair);border-radius:2px;background:#fff;color:var(--texte)}
input:focus,select:focus,textarea:focus{border-color:var(--nuit);outline:none;box-shadow:0 0 0 3px rgba(59,126,161,.25)}
textarea{min-height:130px;resize:vertical}
.opts{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:.5rem}
.opt{position:relative}
.opt input{position:absolute;opacity:0;inset:0;width:100%;height:100%;margin:0;cursor:pointer}
.opt span{display:block;border:1.5px solid var(--alu-clair);padding:.75rem .85rem;font-weight:520;border-radius:2px;min-height:48px}
.opt input:checked+span{border-color:var(--nuit);background:var(--verre)}
.opt input:focus-visible+span{outline:3px solid #3B7EA1;outline-offset:2px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
@media (max-width:560px){.row2{grid-template-columns:1fr}}
.chk{display:flex;gap:.7rem;align-items:flex-start;font-weight:400;font-size:.95rem}
.chk input{width:22px;height:22px;flex-shrink:0;margin-top:.15rem}
.form-nav{display:flex;justify-content:space-between;gap:1rem;margin-top:1.4rem;flex-wrap:wrap}
.err{color:var(--err);font-size:.9rem;margin-top:.3rem;display:none}
.f.bad input,.f.bad select,.f.bad textarea{border-color:var(--err)}
.f.bad .err,fieldset.bad .err{display:block}
.msg{padding:1rem 1.2rem;border-left:3px solid var(--err);background:#FBF0EE;margin:1rem 0;display:none}
.msg.show{display:block}
.hp{display:none}
.js .step{display:none}.js .step.cur{display:block}
.nojs-hint{font-size:.9rem;color:var(--texte-2)}
.js .nojs-hint{display:none}
/* Pied de page */
.ft{background:#0E1A2C;color:#C3CCD6;padding:3.5rem 0 2rem;font-size:.94rem}
.ft a{color:#E4E9EE;text-decoration:none}
.ft a:hover{text-decoration:underline;color:#fff}
.ft .grid{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:2rem}
.ft h2{color:#fff;font-size:.98rem;margin:0 0 .8rem;font-stretch:108%}
.ft ul{list-style:none;padding:0;margin:0}
.ft li{margin-bottom:.4rem}
.ft .logo{color:#fff;margin-bottom:1rem}
.ft .logo span b{color:var(--alu)}
.ft .legal{border-top:1px solid #23344C;margin-top:2.5rem;padding-top:1.4rem;display:flex;flex-wrap:wrap;gap:1rem 2rem;justify-content:space-between}
@media (max-width:900px){.ft .grid{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.ft .grid{grid-template-columns:1fr}}
@media print{.hd,.ft,aside,.band{display:none}}

.jsonly{display:none}.js .jsonly{display:inline-flex}.js .prog.jsonly{display:flex}
[hidden]{display:none!important}
mark{background:#FFF1B8;color:#3A2E00;padding:0 .2em}

/* Héros photographique */
.hero-photo{background:linear-gradient(var(--nuit) 0 62%,var(--fond) 62% 100%)}
.hero-photo .hero-txt{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:1.2rem 3rem;align-items:end;padding-top:clamp(1.6rem,3.2vw,2.6rem);padding-bottom:clamp(1.4rem,2.6vw,2rem)}
.hero-photo .slogan{margin-bottom:1rem}
.hero-photo h1{margin:0;font-size:clamp(2.05rem,3.7vw,3.25rem);max-width:18ch;line-height:1.06}
.hero-photo .lead{margin:0;font-size:1.12rem}
.hero-photo .acts{margin-top:1.1rem;gap:.6rem}
.hero-photo .acts .btn{padding:.75rem 1.1rem}
.hero-fig{margin:0 auto;max-width:var(--mesure);padding:0 var(--pas)}
.hero-fig img{width:100%;height:auto;display:block;box-shadow:0 30px 60px -30px rgba(19,35,58,.55);background:#2a3442}
@media (max-width:860px){
  .hero-photo{background:linear-gradient(var(--nuit) 0 80%,var(--fond) 80% 100%)}
  .hero-photo .hero-txt{grid-template-columns:1fr}
  .hero-fig{padding:0}
  .hero-fig img{box-shadow:none}
}

/* Barre d'action mobile et rappel en cours de lecture */
.mcta{display:none}
@media (max-width:860px){
  .mcta{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:40;padding:.6rem var(--pas) calc(.6rem + env(safe-area-inset-bottom));background:rgba(255,255,255,.97);border-top:1px solid var(--ligne);box-shadow:0 -8px 24px -16px rgba(19,35,58,.4);transform:translateY(110%);transition:transform .25s ease}
  .mcta.on{transform:none}
  .mcta .btn{width:100%}
  body.has-mcta{padding-bottom:76px}
}
.cta-mid{border:1px solid var(--ligne);border-left:3px solid var(--nuit);background:var(--fond-2);padding:1.2rem 1.4rem;margin:2.2rem 0;max-width:72ch;display:flex;flex-wrap:wrap;align-items:center;gap:1rem 1.5rem;justify-content:space-between}
.cta-mid p{margin:0;flex:1 1 300px}
.cta-mid strong{color:var(--nuit)}
.opt-hint{background:var(--verre);padding:.8rem 1rem;border-left:3px solid var(--nuit);font-size:.95rem}
details.more{margin:0 0 1.15rem;border-top:1px solid var(--ligne);border-bottom:1px solid var(--ligne);padding:.2rem 0}
details.more summary{cursor:pointer;font-weight:600;color:var(--nuit);padding:.8rem 0}
details.more[open]{padding-bottom:.6rem}

.form{scroll-margin-top:96px}
.linkbtn{background:none;border:0;padding:0;font:inherit;font-weight:650;color:var(--nuit);text-decoration:underline;text-underline-offset:.18em;cursor:pointer;white-space:nowrap}

.sources{font-size:.9rem;color:var(--texte-2);padding-left:1.2rem}
.sources li{margin-bottom:.35rem}
.sources a{color:var(--texte-2);word-break:break-word}