/* Nuage et Acier — charte NEA
   Bleu nuit #0B1F36 · Bleu NEA #0E7BEF · Orange NEA #FF7A00 · Gris acier #9AA3AE · Gris nuage #F2F5F8 */
:root{
  --nuit:#0B1F36; --nea:#0E7BEF; --nea-txt:#0A64C9; --orange:#FF7A00; --acier:#9AA3AE; --nuage:#F2F5F8;
  --text:#2E3A48; --muted:#56616E;
  --bg:#FFFFFF; --head:var(--nea); --ink:var(--nuit); --line:var(--nuit); --soft-line:#E3E8EE;
  --card:#FFFFFF; --card-line:#E3E8EE; --tag-line:var(--nuit);
  --font-title:'Montserrat','Segoe UI',sans-serif; --font-text:'Inter','Segoe UI',system-ui,sans-serif; --font-tech:'IBM Plex Mono',ui-monospace,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font-text);font-size:17px;line-height:1.6;color:var(--text);background:#E6EBF1}
img{max-width:100%;display:block}
a{color:var(--nea-txt)}a:hover{color:var(--nuit)}
:focus-visible{outline:3px solid var(--orange);outline-offset:3px}
h1,h2,h3{font-family:var(--font-title);margin:0}
p{margin:0}
.wrap{max-width:1200px;margin:0 auto;padding:0 32px}
.skip{position:absolute;left:-999px;top:8px;background:var(--orange);color:var(--nuit);padding:10px 16px;z-index:100;font-weight:600}
.skip:focus{left:8px}

/* Feuille de plan (mode plan) */
.sheet{margin:24px;border:2px solid var(--nuit);outline:1px solid var(--nuit);outline-offset:5px;background:#fff;overflow:hidden}

/* En-tête */
.topbar{background:var(--bg);border-bottom:1.5px solid var(--line)}
.topbar .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;padding-top:14px;padding-bottom:14px}
.brand img{height:64px;width:auto}
.logo-atelier{display:none}
.nav{display:flex;flex-wrap:wrap;align-items:center;gap:8px 24px;font-weight:500;font-size:16px}
.nav > a{color:var(--ink);text-decoration:none}
.nav > a:hover{color:var(--nea-txt)}
.social{display:inline-flex;align-items:center;gap:6px;padding-left:20px;border-left:1px solid var(--soft-line)}
.social a{display:inline-flex;align-items:center;gap:6px;min-height:44px;min-width:44px;justify-content:center;color:var(--ink);text-decoration:none}
.social svg{flex:none}
.mode-toggle{font:inherit;font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:8px;min-height:40px;padding:8px 14px;border:1.5px solid var(--line);background:transparent;color:var(--ink);border-radius:2px;cursor:pointer}
.btn{display:inline-flex;align-items:center;min-height:48px;padding:12px 24px;border-radius:2px;font-weight:600;text-decoration:none;border:1.5px solid transparent;font-size:16px}
.btn-primary{background:var(--orange);color:var(--nuit)}
.btn-primary:hover{background:#E56A00;color:var(--nuit)}
.btn-ghost{border-color:var(--nea);color:var(--nea-txt);background:transparent}
.btn-ghost:hover{background:var(--nea);color:#fff}
.nav .btn{min-height:44px;padding:10px 18px}

/* Sections */
section{background:var(--bg);color:var(--text)}
section h2{font-size:clamp(28px,3vw,38px);line-height:1.15;color:var(--head);font-weight:700}
.sec{padding:88px 0}
.sec .wrap{display:flex;flex-direction:column;gap:40px}
.intro{display:flex;flex-direction:column;gap:12px;max-width:760px}
.s-alt{background:var(--nuage)}
.rule-top{border-top:1.5px solid var(--line)}
.rule-bottom{border-bottom:1.5px solid var(--line)}

/* Étiquette cartouche */
.tag{display:inline-flex;align-self:flex-start;border:1.5px solid var(--tag-line);font-family:var(--font-tech);font-size:13px;letter-spacing:.06em;color:var(--ink);background:var(--card)}
.tag b{font-weight:500;padding:6px 12px;border-right:1.5px solid var(--tag-line);background:var(--orange);color:var(--nuit)}
.tag span{padding:6px 14px}

/* Intro */
.hero{position:relative;overflow:hidden;border-bottom:1.5px solid var(--line)}
.hero .wrap{position:relative;z-index:1;padding-top:96px;padding-bottom:72px;display:flex;flex-direction:column;gap:28px}
.hero-motif{position:absolute;right:-30px;top:48px;width:400px;height:auto;pointer-events:none}
.kicker{font-family:var(--font-tech);font-size:14px;color:var(--muted)}
.hero h1{font-size:clamp(36px,5.2vw,66px);line-height:1.05;letter-spacing:-.02em;font-weight:800;color:var(--head);max-width:900px}
.hero h1 em{font-style:normal;color:var(--orange)}
.hero .lead{font-size:20px;max-width:720px}
.actions{display:flex;flex-wrap:wrap;gap:14px}
.cartouche{border:1.5px solid var(--line);margin-top:20px}
.cartouche-head{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 24px;padding:10px 18px;background:var(--nuit);color:#fff;font-family:var(--font-tech);font-size:13px;letter-spacing:.04em}
.cartouche-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1.5px;background:var(--line)}
.cartouche-grid div{background:var(--card);padding:14px 18px;display:flex;flex-direction:column;gap:2px}
.cartouche-grid small{font-family:var(--font-tech);font-size:12px;color:var(--muted)}
.cartouche-grid strong{font-size:19px;font-weight:600;color:var(--ink)}

/* À propos */
.about{display:flex;flex-wrap:wrap;gap:48px;align-items:center}
.about img{flex:0 1 340px;width:340px;height:400px;object-fit:cover;object-position:center top;border-radius:2px}
.about-text{flex:999 1 480px;min-width:0;display:flex;flex-direction:column;gap:16px}
.values{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}
.values div{border-top:3px solid var(--orange);padding-top:18px;display:flex;flex-direction:column;gap:8px}
.values h3,.services h3{font-size:21px;font-weight:700;color:var(--ink)}
.values p,.services p{font-size:16px}

/* Références */
.refs{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:24px}
.ref{margin:0;background:var(--card);border:1px solid var(--card-line);border-radius:2px;overflow:hidden;display:flex;flex-direction:column;transition:border-color .3s,box-shadow .3s}
.ref:hover{border-color:var(--nea);box-shadow:0 10px 28px rgba(11,31,54,.12)}
.ref .ph{height:280px;overflow:hidden;background:#E6EBF1}
.ref .ph img{width:100%;height:280px;object-fit:cover;transition:transform .5s ease}
.ref:hover .ph img{transform:scale(1.08)}
.ref figcaption{padding:20px;display:flex;flex-direction:column;gap:2px}
.ref figcaption strong{font-family:var(--font-title);font-size:19px;font-weight:700;color:var(--ink)}
.ref figcaption span{font-size:15px;color:var(--muted)}
.ref .mission{margin-top:10px;padding-top:10px;border-top:1px solid var(--card-line);font-size:15px;color:var(--text);display:flex;flex-direction:column;gap:2px}
.ref .mission small{font-family:var(--font-tech);font-size:12px;color:var(--muted)}
.proof{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;background:var(--card);border:1px solid var(--card-line);border-radius:2px;padding:22px 24px}
.proof strong{display:block;font-family:var(--font-title);font-size:20px;color:var(--ink)}
.proof span{font-size:15px;color:var(--muted)}

.ref .ph-plan{height:200px;position:relative;display:flex;align-items:flex-end;padding:18px;background-color:var(--nuit);background-image:linear-gradient(rgba(14,123,239,.2) 1px,transparent 1px),linear-gradient(90deg,rgba(14,123,239,.2) 1px,transparent 1px);background-size:24px 24px}
.ph-plan::before{content:"";position:absolute;inset:0;background:linear-gradient(115deg,transparent 52%,rgba(14,123,239,.45) 52%,rgba(14,123,239,.45) 63%,rgba(154,163,174,.25) 63%,rgba(154,163,174,.25) 71%,transparent 71%),linear-gradient(115deg,transparent 80%,#FF7A00 80%,#FF7A00 86%,transparent 86%);transition:transform .5s ease;transform-origin:right center}
.ref:hover .ph-plan::before{transform:scale(1.08)}
.ph-plan span{position:relative;font-family:var(--font-tech);font-size:13px;color:#F2F5F8;border:1px solid rgba(242,245,248,.6);padding:4px 10px;background:rgba(11,31,54,.6)}
[data-mode="atelier"] .ref .ph-plan{background-color:#10294A}

/* Prestations */
.services{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}
.services article{background:var(--card);border:1px solid var(--card-line);border-radius:2px;padding:28px;display:flex;flex-direction:column;gap:12px}
.services h3{color:var(--head)}

/* Labo */
.labo{padding:56px 0}
.labo-box{display:flex;flex-wrap:wrap;align-items:center;gap:24px 40px;border:1.5px dashed var(--line);background:var(--card);padding:28px 32px}
.labo-box > div{flex:1 1 420px;min-width:0;display:flex;flex-direction:column;gap:8px}
.labo-box h2{font-size:28px}
.status{display:inline-flex;align-items:center;gap:10px;border:1.5px solid var(--line);padding:12px 20px;font-weight:600;min-height:48px;color:var(--ink)}
.status i{width:8px;height:8px;border-radius:50%;background:var(--orange)}

/* Devis (toujours sombre) */
.devis{--bg:var(--nuit);--text:#C9D3DE;--head:#fff;--ink:#fff;--tag-line:#F2F5F8;--card:transparent;background:var(--nuit)}
.devis .wrap{flex-direction:row;flex-wrap:wrap;gap:56px}
.devis-info{flex:1 1 320px;display:flex;flex-direction:column;gap:20px}
.devis h2 em{font-style:normal;color:var(--orange)}
.contacts{display:flex;flex-direction:column;gap:10px;border-top:1px solid #1E3552;padding-top:20px;font-size:16px}
.contacts a{color:#fff}
form.quote{flex:999 1 560px;min-width:0;background:#fff;color:var(--nuit);border-radius:2px;padding:32px;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
.field label{font-weight:600;font-size:15px}
.field input,.field select,.field textarea{font:inherit;padding:11px 12px;border:1px solid #C5CED8;border-radius:2px;min-height:44px;background:#fff;color:var(--nuit)}
.field textarea{resize:vertical}
.hint{font-size:14px;color:var(--muted)}
.hp{position:absolute;left:-9999px}
form.quote button{font:inherit;font-weight:600;background:var(--orange);color:var(--nuit);border:0;border-radius:2px;padding:14px 28px;min-height:48px;cursor:pointer}

/* Pied de page */
.foot{background:var(--nuit);border-top:1px solid #1E3552;color:#9AA3AE;font-size:15px}
.foot .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;padding-top:28px;padding-bottom:28px}
.foot .id{display:flex;flex-wrap:wrap;align-items:center;gap:20px}
.foot img{height:72px;width:auto}
.foot nav{display:flex;flex-wrap:wrap;gap:20px}
.foot a{color:#F2F5F8}

/* ===== Mode atelier ===== */
[data-mode="atelier"] body{background:var(--nuit)}
[data-mode="atelier"] .sheet{margin:0;border:0;outline:0}
[data-mode="atelier"] .grid-light{background-color:#fff;background-image:linear-gradient(rgba(14,123,239,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(14,123,239,.08) 1px,transparent 1px);background-size:48px 48px}
[data-mode="atelier"] .dark-in-atelier,[data-mode="atelier"] .devis{
  --bg:var(--nuit);--text:#C9D3DE;--muted:#9AA3AE;--head:#fff;--ink:#fff;--line:#2A4566;--soft-line:#2A4566;--card:#10294A;--card-line:#24406A;--tag-line:#F2F5F8;--nea-txt:#6FB0F6;
  background-color:var(--nuit);background-image:linear-gradient(rgba(14,123,239,.14) 1px,transparent 1px),linear-gradient(90deg,rgba(14,123,239,.14) 1px,transparent 1px);background-size:48px 48px}
[data-mode="atelier"] .hero{background-image:linear-gradient(rgba(14,123,239,.16) 1px,transparent 1px),linear-gradient(90deg,rgba(14,123,239,.16) 1px,transparent 1px),linear-gradient(rgba(14,123,239,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(14,123,239,.07) 1px,transparent 1px);background-size:96px 96px,96px 96px,24px 24px,24px 24px}
[data-mode="atelier"] .devis .tag,[data-mode="atelier"] .dark-in-atelier .tag{background:transparent}
[data-mode="atelier"] .logo-plan{display:none}
[data-mode="atelier"] .logo-atelier{display:block}
[data-mode="atelier"] .ref:hover{border-color:var(--orange)}
[data-mode="atelier"] .cartouche-head{background:#10294A;border-bottom:1.5px solid var(--line)}
[data-mode="atelier"] .btn-ghost{border-color:#6FB0F6;color:#D6E8FC}
[data-mode="atelier"] .ref .ph{background:#17324F}
/* Curseur AutoCAD (souris uniquement) */
#cad{display:none;position:fixed;inset:0;pointer-events:none;z-index:200}
#cad .v{position:absolute;top:0;bottom:0;width:1px;background:rgba(255,122,0,.7)}
#cad .h{position:absolute;left:0;right:0;height:1px;background:rgba(255,122,0,.7)}
#cad .box{position:absolute;width:13px;height:13px;border:1.5px solid var(--orange);transform:translate(-6px,-6px)}
#cad .xy{position:absolute;font-family:var(--font-tech);font-size:12px;line-height:1.4;background:var(--nuit);color:#F2F5F8;border:1px solid var(--orange);padding:3px 8px;white-space:nowrap;transform:translate(16px,16px)}
@media (hover:hover) and (pointer:fine){
  [data-mode="atelier"] body.cad-on, [data-mode="atelier"] body.cad-on a, [data-mode="atelier"] body.cad-on button{cursor:none}
  [data-mode="atelier"] body.cad-on input,[data-mode="atelier"] body.cad-on textarea,[data-mode="atelier"] body.cad-on select{cursor:text}
}

/* Responsive */
@media (max-width:1180px){.hero-motif{display:none}}
@media (max-width:760px){
  .sheet{margin:10px;outline-offset:3px}
  .wrap{padding:0 20px}
  .sec{padding:64px 0}
  .hero .wrap{padding-top:56px}
  .brand img{height:52px}
  .social{border-left:0;padding-left:0}
  .about img{width:100%;flex-basis:100%}
  form.quote{padding:22px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .ref,.ref .ph img{transition:none}
  .ref:hover .ph img,.ref:hover .ph-plan::before{transform:none}
  .ph-plan::before{transition:none}
}