:root{
  --vert:#3E1F47; --vert-fonce:#2C1533; --fond:#F6F3F7; --papier:#FFFFFF;
  --laiton:#C8743B; --encre:#211A24; --gris:#62566A; --trait:#DDD3E0;
  --display:"Bricolage Grotesque",system-ui,sans-serif;
  --texte:"Public Sans",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{margin:0;background:var(--fond);color:var(--encre);font:400 1.0625rem/1.6 var(--texte)}
img,svg{display:block;max-width:100%}
a{color:var(--vert)}
a:hover{color:var(--vert-fonce)}
:focus-visible{outline:3px solid var(--laiton);outline-offset:3px}
.skip{position:absolute;left:-999px;top:0;background:var(--vert);color:#fff;padding:.6rem 1rem;z-index:10}
.skip:focus{left:1rem}
.wrap{max-width:72rem;margin:0 auto;padding:0 1.5rem}
.narrow{max-width:46rem}
h1,h2,h3{font-family:var(--display);font-weight:700;line-height:1.1;letter-spacing:-.01em;margin:0 0 .6em}
h1{font-size:clamp(2.2rem,5vw,3.6rem)}
h2{font-size:clamp(1.6rem,3vw,2.2rem)}
h3{font-size:1.2rem;font-weight:500}
p{margin:0 0 1em;max-width:68ch}

/* En-tête */
.site-header{background:var(--papier);border-bottom:1px solid var(--trait);position:sticky;top:0;z-index:5}
.header-row{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:4.5rem}
.logo{display:flex;align-items:center;gap:.6rem;text-decoration:none;color:var(--encre);font:700 1.35rem var(--display)}
.logo-mark{width:2rem;height:2rem}
nav ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:.2rem 1.1rem;align-items:center}
nav a{text-decoration:none;color:var(--encre);font-size:.95rem;padding:.3rem 0}
nav a[aria-current="page"]{box-shadow:inset 0 -2px 0 var(--laiton)}
.nav-cta{background:var(--vert);color:#fff!important;padding:.55rem 1rem!important;border-radius:999px}
.menu-toggle{display:none;font:600 1rem var(--texte);background:none;border:1px solid var(--trait);border-radius:999px;padding:.45rem 1rem;color:var(--encre)}
@media (max-width:980px){
  .menu-toggle{display:block}
  #menu{display:none;position:absolute;left:0;right:0;top:100%;background:var(--papier);border-bottom:1px solid var(--trait);padding:1rem 1.5rem 1.5rem}
  .menu-open #menu{display:block}
  nav ul{flex-direction:column;align-items:flex-start}
}

/* Boutons */
.btn{display:inline-block;background:var(--vert);color:#fff;text-decoration:none;font:600 1rem var(--texte);padding:.9rem 1.5rem;border-radius:999px;border:0;cursor:pointer}
.btn:hover{background:var(--vert-fonce);color:#fff}

/* Accueil : le registre */
.home-hero{padding:4rem 0 3.5rem;background:var(--papier);border-bottom:1px solid var(--trait)}
.home-hero h1{max-width:18ch;margin-bottom:2rem}
.ledger{list-style:none;margin:0 0 2rem;padding:0;border-top:2px solid var(--encre)}
.ledger li{border-bottom:1px solid var(--trait)}
.ledger a{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr) auto;align-items:baseline;gap:1.5rem;padding:1rem .25rem;text-decoration:none;color:var(--encre)}
.ledger a::after{content:"";width:.7rem;height:.7rem;border-top:2px solid var(--laiton);border-right:2px solid var(--laiton);transform:rotate(45deg);align-self:center;transition:transform .2s}
.ledger a:hover{background:var(--fond)}
.ledger a:hover::after{transform:translateX(4px) rotate(45deg)}
.l-obj{font:700 clamp(1.5rem,3.4vw,2.6rem)/1.1 var(--display);color:var(--vert)}
.l-det{color:var(--gris)}
@media (max-width:640px){.ledger a{grid-template-columns:1fr auto;gap:.2rem 1rem}.l-det{grid-column:1}.ledger a::after{grid-row:1/3;grid-column:2}}
.hero-note{font-size:1.1rem}
.hero-actions{margin-top:1.5rem}

/* Pages offres */
.page-hero{padding:3.5rem 0 3rem;background:var(--vert);color:#fff}
.page-hero a{color:#fff}
.page-hero .btn{background:var(--laiton);color:var(--encre)}
.page-hero .btn:hover{background:#D9884F;color:var(--encre)}
.crumbs{font-size:.9rem;opacity:.85;margin-bottom:1rem}
.lead{font-size:1.2rem;max-width:60ch}
.section{padding:4rem 0}
.section+.section{border-top:1px solid var(--trait)}
.what-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr));gap:2rem;margin:1.5rem 0 2rem}
.what-item{border-left:3px solid var(--laiton);padding-left:1rem}
.what-item p{color:var(--gris);margin:0}
.who{background:var(--papier);padding:1rem 1.25rem;border-radius:.5rem}
.partner{background:var(--papier)}
.link-out{font-weight:600}
.steps{list-style:none;counter-reset:s;padding:0;margin:1.5rem 0 0;display:grid;grid-template-columns:repeat(auto-fit,minmax(12rem,1fr));gap:1.5rem}
.steps li{counter-increment:s;padding-top:3.2rem;position:relative}
.steps li::before{content:counter(s);position:absolute;top:0;left:0;width:2.4rem;height:2.4rem;border-radius:50%;border:2px solid var(--vert);display:grid;place-items:center;font:700 1.1rem var(--display);color:var(--vert)}
.steps p{color:var(--gris);margin:0}

/* Partenaires accueil */
.partner-list{list-style:none;padding:0;margin:1.5rem 0 0;display:grid;grid-template-columns:repeat(auto-fit,minmax(13rem,1fr));gap:1.5rem 2rem}
.partner-list li{border-top:2px solid var(--vert);padding-top:.8rem}
.partner-list p{color:var(--gris);margin:0}
.two-col{display:grid;grid-template-columns:repeat(auto-fit,minmax(20rem,1fr));gap:3rem}

/* FAQ */
.faq details{border-bottom:1px solid var(--trait);padding:1rem 0}
.faq summary{cursor:pointer;font:500 1.15rem var(--display);list-style:none;display:flex;justify-content:space-between;gap:1rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--laiton);font-size:1.5rem;line-height:1}
.faq details[open] summary::after{content:"−"}
.faq details p{margin:.8rem 0 0;color:var(--gris)}

/* Formulaire */
.demande{background:var(--papier)}
.form{margin:1.5rem 0}
.field{margin-bottom:1.1rem;display:flex;flex-direction:column;gap:.35rem}
.field-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(14rem,1fr));gap:0 1.25rem}
label{font-weight:600;font-size:.95rem}
input,select,textarea{font:inherit;padding:.75rem .85rem;border:1px solid #AEB8B1;border-radius:.4rem;background:#fff;color:var(--encre);width:100%}
.check{flex-direction:row;align-items:flex-start;gap:.6rem}
.check input{width:auto;margin-top:.3rem}
.check label{font-weight:400}
.hp{position:absolute;left:-9999px}
.small{font-size:.9rem;color:var(--gris)}
.legal h2{font-size:1.4rem;margin-top:2rem}

/* Pied de page */
.site-footer{background:var(--vert-fonce);color:#EADFEC;padding:3.5rem 0 2rem;font-size:.95rem}
.site-footer a{color:#fff}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(14rem,1fr));gap:2rem}
.footer-brand{display:flex;align-items:center;gap:.6rem;font:700 1.3rem var(--display);color:#fff}
.footer-brand svg{width:2rem}
.footer-title{font:600 1rem var(--display);color:#fff}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:.35rem}
.offices{color:var(--laiton)}
.footer-legal{border-top:1px solid rgba(255,255,255,.15);margin-top:2.5rem;padding-top:1.5rem;font-size:.85rem}

/* Sous-menus */
nav li{position:relative}
.sub{display:none;position:absolute;top:100%;left:-1rem;min-width:16rem;background:var(--papier);border:1px solid var(--trait);border-radius:.5rem;padding:.6rem 1rem;flex-direction:column;align-items:flex-start;gap:.2rem;box-shadow:0 8px 24px rgba(62,31,71,.14)}
.has-sub:hover>.sub,.has-sub:focus-within>.sub{display:flex}
.has-sub>a::after{content:"";display:inline-block;width:.35rem;height:.35rem;margin-left:.4rem;border-right:2px solid var(--laiton);border-bottom:2px solid var(--laiton);transform:translateY(-3px) rotate(45deg)}
.has-sub.active>a{box-shadow:inset 0 -2px 0 var(--laiton)}
@media (max-width:1100px){
  .menu-toggle{display:block}
  #menu{display:none;position:absolute;left:0;right:0;top:100%;background:var(--papier);border-bottom:1px solid var(--trait);padding:1rem 1.5rem 1.5rem;max-height:calc(100vh - 4.5rem);overflow:auto}
  .menu-open #menu{display:block}
  nav ul{flex-direction:column;align-items:flex-start}
  .sub{display:flex;position:static;border:0;box-shadow:none;padding:.2rem 0 .4rem 1rem;min-width:0}
  .has-sub>a::after{display:none}
}
/* Accueil : bandeaux Chantier / Niches */
.bands{background:var(--vert);color:#fff}
.bands a{color:#fff}
.band h2 a{text-decoration:none;box-shadow:inset 0 -3px 0 var(--laiton)}
.band-list{list-style:none;padding:0;margin:1.2rem 0 0}
.band-list li{border-top:1px solid rgba(255,255,255,.18);padding:.8rem 0;display:flex;flex-direction:column}
.band-list a{font:500 1.15rem var(--display)}
.band-list span{opacity:.85;font-size:.95rem}
.hub-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(16rem,1fr));gap:2rem}
.hub-list li{border-top:3px solid var(--laiton);padding-top:1rem}
.hub-list h3{font-size:1.4rem}
.hub-list p{color:var(--gris)}
/* Ajustement de l'en-tête : une seule ligne sur grand écran */
@media (min-width:1101px){
  .header-row{flex-wrap:nowrap}
  nav ul{flex-wrap:nowrap;gap:.2rem .95rem}
  nav a{font-size:.9rem;white-space:nowrap}
  .wrap.header-row{max-width:80rem}
}
@media (min-width:1101px) and (max-width:1280px){.nav-cta{display:none}}
.home-hero h1{max-width:16ch;margin-bottom:.8rem}
.hero-sub{font-size:1.25rem;color:var(--gris);margin-bottom:2.2rem;max-width:52ch}

/* Simulateur */
.sim-tabs{display:flex;gap:.5rem;margin-bottom:1.5rem;flex-wrap:wrap}
.sim-tabs button{font:600 1rem var(--texte);padding:.7rem 1.2rem;border-radius:999px;border:1px solid var(--trait);background:var(--papier);color:var(--encre);cursor:pointer}
.sim-tabs button[aria-selected="true"]{background:var(--vert);border-color:var(--vert);color:#fff}
.sim-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:2.5rem;align-items:start}
@media (max-width:800px){.sim-grid{grid-template-columns:1fr}}
.sim-form{background:var(--papier);padding:1.5rem;border-radius:.75rem;border:1px solid var(--trait)}
.sim-form output{font-weight:700;color:var(--vert)}
input[type=range]{padding:0;border:0;accent-color:var(--laiton);background:none}
.sim-result{background:var(--vert);color:#fff;padding:2rem;border-radius:.75rem;position:sticky;top:6rem}
.sim-label{opacity:.85;margin:0}
.sim-big{font:700 clamp(2.4rem,5vw,3.4rem)/1.1 var(--display);margin:.3rem 0 1.2rem;font-variant-numeric:tabular-nums}
.sim-detail{margin:0 0 1.5rem}
.sim-detail div{display:flex;justify-content:space-between;gap:1rem;border-top:1px solid rgba(255,255,255,.18);padding:.55rem 0}
.sim-detail dt{opacity:.85}
.sim-detail dd{margin:0;font-weight:600;font-variant-numeric:tabular-nums;text-align:right}
.sim-result .btn{background:var(--laiton);color:var(--encre)}
/* Articles */
.meta{opacity:.8;font-size:.95rem}
.prose h2{margin-top:2.2rem}
.prose ul{padding-left:1.2rem;max-width:68ch}
.prose li{margin-bottom:.4rem}
.cta-box{background:var(--papier);border-left:4px solid var(--laiton);padding:1.25rem 1.5rem;margin:2.5rem 0;border-radius:.5rem}
.related{padding-left:1.2rem}
.blog-list{margin-bottom:3rem}
/* Accueil : outils */
.tools{display:grid;grid-template-columns:repeat(auto-fit,minmax(18rem,1fr));gap:2rem}
.tool{background:var(--papier);border:1px solid var(--trait);border-radius:.75rem;padding:1.75rem}
.tool h2{font-size:1.5rem}
.article-links{list-style:none;padding:0;margin:0}
.article-links li{border-top:1px solid var(--trait);padding:.6rem 0}
@media (max-width:800px){.sim-result{position:static}}
.sim > .small{margin-top:1.5rem}
@media (min-width:1101px) and (max-width:1380px){.nav-cta{display:none}}
@media (min-width:1101px) and (max-width:1200px){nav ul{gap:.2rem .7rem} nav a{font-size:.85rem}}