:root{
  --bleu:#1F5C87; --bleu-fonce:#164764; --texte:#25292e; --gris:#5c6670;
  --fond:#ffffff; --fond-doux:#f4f7f9; --bord:#dfe5ea; --accent:#f2a33c;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Calibri,Arial,sans-serif;
     color:var(--texte);background:var(--fond);line-height:1.65;font-size:17px;
     -webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto}
a{color:var(--bleu)}
.wrap{max-width:860px;margin:0 auto;padding:0 24px}

nav.principale{background:var(--bleu);color:#fff}
nav.principale .wrap{display:flex;align-items:center;justify-content:space-between;
                     flex-wrap:wrap;gap:10px;padding-top:14px;padding-bottom:14px}
nav.principale .nom{font-weight:700;letter-spacing:.12em;text-transform:uppercase;font-size:13px;
                    display:flex;align-items:center;gap:11px}
nav.principale .avatar{width:38px;height:38px;border-radius:50%;display:block;
                       border:2px solid rgba(255,255,255,.75);background:#fff}
nav.principale ul{list-style:none;display:flex;gap:20px;margin:0;padding:0;flex-wrap:wrap}
nav.principale a{color:#fff;text-decoration:none;font-size:15px;opacity:.92;
                 position:relative;display:inline-block;padding-bottom:3px;
                 transition:opacity .2s ease, transform .2s ease, letter-spacing .2s ease}
nav.principale a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
                 background:#fff;border-radius:2px;transform:scaleX(0);
                 transform-origin:left center;transition:transform .28s ease}
nav.principale a:hover{opacity:1;transform:translateY(-2px);letter-spacing:.03em}
nav.principale a:hover::after{transform:scaleX(1)}
nav.principale a.actif{opacity:1}
nav.principale a.actif::after{transform:scaleX(1)}
nav.principale a.devis{background:var(--accent);color:#16324a;font-weight:700;
                 padding:8px 16px;border-radius:6px;opacity:1;
                 transition:transform .2s ease, box-shadow .2s ease}
nav.principale a.devis::after{display:none}
nav.principale a.devis:hover{transform:translateY(-2px);letter-spacing:normal;
                 box-shadow:0 6px 16px rgba(0,0,0,.28)}

.banniere{background:var(--bleu);color:#fff;padding:46px 0 42px}
.banniere h1{font-size:31px;line-height:1.25;margin:0 0 12px;font-weight:700}
.banniere p{font-size:18px;margin:0;opacity:.93;max-width:640px}
.banniere .coord{margin-top:26px;font-size:16px}
.banniere .coord a{color:#fff;text-decoration:none;border-bottom:1px solid rgba(255,255,255,.45)}
.banniere .coord span{display:inline-block;margin-right:22px;margin-bottom:6px}

/* --- grande image d'accueil --- */
.hero{position:relative;min-height:520px;display:flex;align-items:center;overflow:hidden;
      background:var(--bleu-fonce)}
.hero img.fond{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero .voile{position:absolute;inset:0;
             background:linear-gradient(100deg,rgba(10,30,46,.87) 0%,rgba(10,30,46,.62) 52%,rgba(10,30,46,.25) 100%)}
.hero .contenu{position:relative;z-index:1;color:#fff;padding-top:70px;padding-bottom:70px}
.hero .surtitre{font-size:13px;letter-spacing:.2em;text-transform:uppercase;opacity:.85;margin:0 0 16px}
.hero h1{font-size:40px;line-height:1.18;margin:0 0 18px;font-weight:700;max-width:620px}
.hero .sous{font-size:19px;line-height:1.6;opacity:.94;max-width:560px;margin:0 0 30px}
.boutons a{display:inline-block;margin:0 12px 10px 0;padding:13px 24px;border-radius:6px;
           text-decoration:none;font-size:16px;font-weight:600;transition:transform .15s ease}
.boutons a:hover{transform:translateY(-2px)}
.boutons .plein{background:#fff;color:var(--bleu-fonce)}
.boutons .contour{border:2px solid rgba(255,255,255,.75);color:#fff}
@media (max-width:560px){
  .hero{min-height:440px}
  .hero h1{font-size:29px}
  .hero .sous{font-size:17px}
}

/* --- les trois piliers du savoir-faire : fond photo + cartes a icones (19/08) --- */
.immersion{position:relative;padding:52px 0;overflow:hidden;border-bottom:1px solid var(--bord)}
.immersion .fondphoto{position:absolute;inset:0;background:url('photos/hero.jpg') center/cover;
  filter:blur(3px) brightness(.9);transform:scale(1.06)}
.immersion .voile{position:absolute;inset:0;
  background:linear-gradient(115deg,rgba(10,32,50,.93) 0%,rgba(16,60,92,.82) 55%,rgba(16,60,92,.55) 100%)}
.immersion .wrap{position:relative;z-index:1}
.immersion h2{color:#fff}
.piliers{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px}
.piliers article{background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.22);
  border-radius:14px;padding:24px 22px 20px;color:#fff;backdrop-filter:blur(6px);
  transition:transform .22s ease, background .22s ease}
.piliers article:hover{transform:translateY(-7px);background:rgba(255,255,255,.17)}
.piliers .ico{width:46px;height:46px;border-radius:11px;background:rgba(255,255,255,.15);
  display:flex;align-items:center;justify-content:center;margin-bottom:14px;
  transition:background .22s ease, transform .22s ease}
.piliers article:hover .ico{background:linear-gradient(135deg,var(--bleu),var(--accent));
  transform:scale(1.1)}
.piliers .ico svg{width:26px;height:26px;stroke:#fff;fill:none;stroke-width:1.8;
  stroke-linecap:round;stroke-linejoin:round}
.piliers h3{margin:0 0 10px;font-size:19px;color:#fff}
.piliers p{font-size:15px;color:#fff;opacity:.92;margin:0;line-height:1.6}

/* --- portrait / un seul interlocuteur --- */
.duo{display:grid;grid-template-columns:1fr 240px;gap:36px;align-items:center}
.duo .portrait{justify-self:center}
.duo .portrait img{max-width:240px;display:block;filter:drop-shadow(0 10px 24px rgba(20,50,75,.25))}
@media (max-width:700px){.duo{grid-template-columns:1fr}.duo .portrait{order:-1}.duo .portrait img{max-width:180px}}

section{padding:42px 0;border-bottom:1px solid var(--bord)}
section:last-of-type{border-bottom:0}
h2{font-size:21px;color:var(--bleu-fonce);margin:0 0 18px;font-weight:700}
h3{font-size:18px;color:var(--bleu-fonce);margin:26px 0 10px}
p{margin:0 0 16px}

ul.produits{list-style:none;padding:0;margin:0;display:grid;
            grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
ul.produits li{position:relative;background:#fff;border:1px solid var(--bord);border-radius:12px;
               padding:18px 18px 16px 64px;
               transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease}
ul.produits li:hover{transform:translateY(-5px);box-shadow:0 12px 26px rgba(20,50,75,.14);
               border-color:var(--bleu)}
ul.produits .ico{position:absolute;left:14px;top:16px;width:38px;height:38px;border-radius:10px;
               background:var(--fond-doux);display:flex;align-items:center;justify-content:center;
               transition:background .22s ease}
ul.produits li:hover .ico{background:linear-gradient(135deg,var(--bleu),var(--bleu-fonce))}
ul.produits .ico svg{width:22px;height:22px;stroke:var(--bleu);fill:none;stroke-width:1.8;
               stroke-linecap:round;stroke-linejoin:round;transition:stroke .22s ease}
ul.produits li:hover .ico svg{stroke:#fff}
ul.produits b{display:block;color:var(--bleu-fonce);margin-bottom:3px;font-size:16.5px}
ul.produits span{font-size:14.5px;color:var(--gris);line-height:1.5;display:block}

ol.etapes{margin:0;padding-left:22px}
ol.etapes li{margin-bottom:12px}
ol.etapes b{color:var(--bleu-fonce)}

/* --- pele-mele de photos de l'accueil (maquette D validee le 19/08/2026) --- */
.pelemele{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;
  gap:4px 0;margin:0;padding:14px 0;list-style:none}
.pelemele li{background:#fff;padding:7px;border:1px solid #e8e8e4;
  box-shadow:0 3px 10px rgba(20,40,60,.18);margin:-6px -10px;
  transition:transform .3s ease,box-shadow .3s ease}
.pelemele a{display:block;text-decoration:none}
.pelemele .cadre{position:relative;overflow:hidden}
.pelemele img{width:100%;object-fit:cover;display:block}
.pelemele .legende{position:absolute;left:0;right:0;bottom:0;padding:26px 10px 7px;
  background:linear-gradient(180deg,rgba(10,30,46,0),rgba(10,30,46,.74));
  color:#fff;font-size:12px;font-weight:600;line-height:1.3}
.pelemele .points{position:absolute;top:7px;left:0;right:0;display:flex;
  justify-content:center;gap:5px;z-index:2}
.pelemele .points span{width:7px;height:7px;border-radius:50%;cursor:pointer;
  background:rgba(255,255,255,.55);border:1px solid rgba(0,0,0,.2);
  box-shadow:0 1px 3px rgba(0,0,0,.3);transition:background .2s ease, transform .2s ease}
.pelemele .points span.actif{background:#fff;transform:scale(1.3)}
.pelemele .t1{width:150px}.pelemele .t1 img{aspect-ratio:4/3.4}
.pelemele .t2{width:205px}.pelemele .t2 img{aspect-ratio:4/3.2}
.pelemele .t3{width:270px}.pelemele .t3 img{aspect-ratio:4/3}
.pelemele .t4{width:335px}.pelemele .t4 img{aspect-ratio:16/9.5}
.pelemele .tp{width:180px}.pelemele .tp img{aspect-ratio:3/3.9}
.pelemele li:nth-child(6n+1){transform:rotate(-2.6deg)}
.pelemele li:nth-child(6n+2){transform:rotate(1.9deg) translateY(10px)}
.pelemele li:nth-child(6n+3){transform:rotate(-1.3deg) translateY(-6px)}
.pelemele li:nth-child(6n+4){transform:rotate(2.7deg)}
.pelemele li:nth-child(6n+5){transform:rotate(-2.9deg) translateY(8px)}
.pelemele li:nth-child(6n){transform:rotate(1.5deg) translateY(-4px)}
.pelemele li:hover{transform:rotate(0deg) scale(1.5);box-shadow:0 18px 44px rgba(20,40,60,.38);
  position:relative;z-index:5}
.pelemele li.t3:hover,.pelemele li.t4:hover{transform:rotate(0deg) scale(1.3)}
@media (max-width:560px){
  .pelemele .t1,.pelemele .t2,.pelemele .t3,.pelemele .tp{width:46%}
  .pelemele .t4{width:94%}
  .pelemele li:hover,.pelemele li.t3:hover,.pelemele li.t4:hover{transform:rotate(0deg) scale(1.1)}
}

/* --- bandeau partenaire Fourtech+ / QUALIBAT-RGE --- */
.partenaires{display:flex;align-items:center;justify-content:center;gap:34px;flex-wrap:wrap}
.partenaires img{display:block;height:68px;width:auto}
.partenaires p{margin:0;max-width:440px;font-size:15.5px;color:#3a4249}

.grille{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:22px;
        margin:0;padding:0;list-style:none}
.carte{border:1px solid var(--bord);border-radius:8px;overflow:hidden;background:#fff;
       transition:box-shadow .15s ease}
.carte:hover{box-shadow:0 4px 16px rgba(20,50,75,.13)}
.carte a{text-decoration:none;color:inherit;display:block}
.carte img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover;background:var(--fond-doux);
           transition:transform .45s ease}
.carte a:hover img{transform:scale(1.06)}
.carte .cadre{overflow:hidden;position:relative}
.carte .points{position:absolute;left:0;right:0;bottom:8px;display:flex;
  justify-content:center;gap:6px;z-index:2}
.carte .points span{width:9px;height:9px;border-radius:50%;cursor:pointer;
  background:rgba(255,255,255,.55);border:1px solid rgba(0,0,0,.2);
  box-shadow:0 1px 3px rgba(0,0,0,.3);transition:background .2s ease, transform .2s ease}
.carte .points span.actif{background:#fff;transform:scale(1.3)}
.carte .txt{padding:14px 16px 16px}
.carte .lieu{font-size:13px;text-transform:uppercase;letter-spacing:.07em;color:var(--gris);
             margin-bottom:5px}
.carte b{display:block;color:var(--bleu-fonce);font-size:17px;line-height:1.35;margin-bottom:6px}
.carte span{font-size:15px;color:var(--gris)}

.vide{background:var(--fond-doux);border:1px dashed var(--bord);border-radius:8px;
      padding:34px 28px;text-align:center;color:var(--gris)}
.vide b{display:block;color:var(--bleu-fonce);font-size:18px;margin-bottom:8px}

/* --- format 1 : mosaique patchwork, pleine largeur sous la banniere --- */
.mosaique{display:grid;grid-template-columns:repeat(6,1fr);gap:5px;background:#fff;grid-auto-flow:dense}
.mosaique a{display:block;position:relative;overflow:hidden;aspect-ratio:1;background:var(--fond-doux)}
.mosaique img{width:100%;height:100%;object-fit:cover;display:block;
              transition:transform .45s ease}
.mosaique a:hover img{transform:scale(1.07)}
.mosaique a .legende{position:absolute;left:0;right:0;bottom:0;padding:26px 12px 10px;
                     color:#fff;font-size:13.5px;line-height:1.3;
                     background:linear-gradient(to top,rgba(11,32,48,.86),rgba(11,32,48,0));
                     opacity:0;transition:opacity .25s ease}
.mosaique a:hover .legende{opacity:1}
.mosaique a.grand{grid-column:span 2;grid-row:span 2}
.mosaique a.large{grid-column:span 3;aspect-ratio:3/1}
@media (max-width:900px){
  .mosaique{grid-template-columns:repeat(4,1fr)}
  .mosaique a.large{grid-column:span 4;aspect-ratio:4/1}
}
@media (max-width:560px){
  .mosaique{grid-template-columns:repeat(2,1fr);gap:3px}
  .mosaique a.grand{grid-column:span 2;grid-row:span 1;aspect-ratio:16/10}
  .mosaique a.large{grid-column:span 2;aspect-ratio:5/2}
  .mosaique a .legende{opacity:1;font-size:12.5px;padding:20px 10px 8px}
}

/* --- carte des chantiers --- */
.carte-bloc{position:relative;border-radius:8px;overflow:hidden;border:1px solid var(--bord);
            background:var(--fond-doux)}
.carte-bloc img{display:block;width:100%}
.pastille{position:absolute;transform:translate(-50%,-50%);width:13px;height:13px;
          border-radius:50%;background:var(--bleu);border:2px solid #fff;
          box-shadow:0 1px 5px rgba(10,40,60,.4);transition:transform .2s ease;z-index:1}
.pastille.moyen{width:18px;height:18px}
.pastille.grand{width:24px;height:24px;background:var(--bleu-fonce)}
.pastille:hover{transform:translate(-50%,-50%) scale(1.4);z-index:3}
.pastille .etiquette{position:absolute;bottom:135%;left:50%;transform:translateX(-50%);
                     background:#0f2a3d;color:#fff;font-size:12.5px;line-height:1.3;
                     padding:5px 10px;border-radius:5px;white-space:nowrap;
                     opacity:0;pointer-events:none;transition:opacity .15s ease}
.pastille:hover .etiquette{opacity:1}
.attribution{font-size:12px;color:var(--gris);margin-top:8px}

/* --- format 2 : ruban qui defile en continu --- */
.ruban{overflow:hidden;background:#0f2a3d;padding:14px 0;position:relative}
.ruban-piste{display:flex;gap:10px;width:max-content;
             animation:defile 70s linear infinite}
.ruban:hover .ruban-piste{animation-play-state:paused}
.ruban a{display:block;flex:0 0 auto;width:300px;height:200px;overflow:hidden;border-radius:4px}
.ruban img{width:100%;height:100%;object-fit:cover;display:block;
           opacity:.88;transition:opacity .25s ease,transform .45s ease}
.ruban a:hover img{opacity:1;transform:scale(1.05)}
@keyframes defile{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@media (prefers-reduced-motion:reduce){.ruban-piste{animation:none}}
@media (max-width:560px){.ruban a{width:210px;height:150px}}

.fiche{list-style:none;padding:0;margin:0 0 26px;font-size:15px;color:var(--gris)}
.fiche li{display:inline-block;margin:0 22px 6px 0}
.fiche b{color:var(--bleu-fonce)}
.galerie{display:grid;gap:16px;margin-top:26px}
.galerie .cadre{overflow:hidden;border-radius:6px;border:1px solid var(--bord)}
.galerie img{display:block;width:100%;transition:transform .5s ease}
.galerie .cadre:hover img{transform:scale(1.04)}

.article p{max-width:660px}
.article .chapo{font-size:19px;color:var(--bleu-fonce);line-height:1.55}

.contact{background:var(--fond-doux);border:1px solid var(--bord);border-radius:8px;
         padding:24px 26px}
.contact div{margin-bottom:10px}
.contact div:last-child{margin-bottom:0}
.contact .lib{display:inline-block;min-width:92px;color:var(--gris);font-size:15px}

.retour{display:inline-block;margin-top:30px;font-size:15px}

/* --- formulaire de demande de devis --- */
.fdevis{max-width:640px}
.fdevis label{display:block;font-weight:600;color:var(--bleu-fonce);font-size:15px;
              margin-bottom:16px}
.fdevis .fac{font-weight:400;color:var(--gris);font-size:13px}
.fdevis input:not([type=hidden]),.fdevis textarea{display:block;width:100%;margin-top:5px;
              padding:10px 12px;font:inherit;font-size:15.5px;color:var(--texte);
              border:1px solid var(--bord);border-radius:8px;background:#fff;
              transition:border-color .2s ease, box-shadow .2s ease}
.fdevis input:focus,.fdevis textarea:focus{outline:none;border-color:var(--bleu);
              box-shadow:0 0 0 3px rgba(31,92,135,.15)}
.fdevis .deux{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:560px){.fdevis .deux{grid-template-columns:1fr}}
.fdevis button{background:var(--accent);color:#16324a;font:inherit;font-weight:700;
              font-size:16px;padding:13px 28px;border:0;border-radius:8px;cursor:pointer;
              transition:transform .2s ease, box-shadow .2s ease}
.fdevis button:hover{transform:translateY(-2px);box-shadow:0 8px 18px rgba(20,50,75,.25)}
.fdevis .note{font-size:13px;color:var(--gris);margin-top:12px}

footer{background:#eef1f4;color:var(--gris);font-size:13.5px;padding:28px 0 34px;line-height:1.6}
footer a{color:var(--bleu)}
footer p{margin:0 0 8px}
footer .liens{margin-bottom:14px}
footer .liens a{margin-right:18px}

@media (max-width:560px){
  body{font-size:16px}
  .banniere{padding:36px 0 32px}
  .banniere h1{font-size:25px}
  .wrap{padding:0 18px}
  nav.principale ul{gap:14px}
}