/* btech.fr : feuille de style commune. Couleurs du logo : rouge #9B111E, gris #585C56. */
:root {
  --rouge: #9B111E;
  --rouge-fonce: #6e0b15;
  --gris: #585C56;
  --noir: #2b2d2a;
  --fond: #f6f5f3;
  --blanc: #ffffff;
  --ligne: #e3e1dd;
  --texte-doux: #8a8d87;
  --rose: #f2b8bd;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: 'Montserrat', 'Segoe UI', Helvetica, Arial, sans-serif; background: var(--fond); color: var(--noir); line-height: 1.55; -webkit-font-smoothing: antialiased; }
a { color: var(--rouge); text-decoration: none; }
a:hover { color: var(--rouge-fonce); }
h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -0.01em; line-height: 1.15; }
p { margin: 0; }
img { max-width: 100%; display: block; }
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* Bandeau */
.bandeau { background: var(--gris); color: var(--fond); font-size: 13px; font-weight: 500; letter-spacing: 0.04em; }
.bandeau .wrap { min-height: 36px; display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-top: 6px; padding-bottom: 6px; }
.bandeau a { color: var(--blanc); font-weight: 700; }
.bandeau .zone { margin-right: 24px; }

/* En-tête */
.entete { background: var(--blanc); border-bottom: 1px solid var(--ligne); position: sticky; top: 0; z-index: 10; }
.entete .wrap { height: 80px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.logo img { height: 40px; width: auto; }
.nav { display: flex; gap: 32px; align-items: center; font-size: 13px; font-weight: 500; text-transform: uppercase; letter-spacing: 0.08em; }
.nav a { color: var(--gris); padding: 6px 0; border-bottom: 2px solid transparent; }
.nav a:hover, .nav a.actif { color: var(--rouge); border-bottom-color: var(--rouge); }
.nav a.btn { border: 0; }
.burger { display: none; background: none; border: 0; padding: 8px; cursor: pointer; }
.burger svg { display: block; }

/* Boutons */
.btn { display: inline-block; background: var(--rouge); color: var(--blanc) !important; font-size: 14px; font-weight: 600; letter-spacing: 0.04em; padding: 14px 24px; border-radius: 2px; border: 0; cursor: pointer; font-family: inherit; }
.btn:hover { background: var(--rouge-fonce); }
.lien-souligne { color: var(--gris); font-size: 14px; font-weight: 600; padding: 14px 4px; border-bottom: 2px solid var(--gris); }
.surtitre { display: inline-flex; align-items: center; gap: 12px; color: var(--rouge); font-size: 13px; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; }
.surtitre::before { content: ""; width: 28px; height: 3px; background: var(--rouge); }
.surtitre.sans::before { display: none; }

/* Hero */
.hero { background: var(--blanc); }
.hero .wrap { padding: 64px 24px 72px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 56px; align-items: center; }
.hero h1 { font-size: 44px; }
.hero .chapo { font-size: 18px; color: var(--gris); max-width: 520px; }
.hero .texte { display: flex; flex-direction: column; gap: 24px; }
.hero .actions { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.hero .visuel { position: relative; }
.hero .visuel img.photo { width: 100%; height: 420px; object-fit: cover; border-radius: 2px; }
.hero .visuel img.picto { position: absolute; right: -20px; bottom: -20px; width: 110px; filter: drop-shadow(0 8px 18px rgba(0,0,0,0.18)); }

/* Sections */
.section { padding: 72px 0; }
.section-blanche { background: var(--blanc); border-top: 1px solid var(--ligne); border-bottom: 1px solid var(--ligne); }
.section-grise { background: var(--gris); color: var(--fond); }
.entete-section { display: flex; justify-content: space-between; align-items: flex-end; gap: 40px; margin-bottom: 36px; flex-wrap: wrap; }
.entete-section h2 { font-size: 32px; margin-top: 12px; }
.entete-section p { color: var(--gris); font-size: 15px; max-width: 380px; }

/* Cartes produits */
.grille-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.carte { background: var(--blanc); border: 1px solid var(--ligne); border-radius: 2px; overflow: hidden; color: var(--noir); display: flex; flex-direction: column; transition: box-shadow .2s; }
.carte:hover { box-shadow: 0 10px 30px rgba(0,0,0,0.08); color: var(--noir); }
.carte img, .carte .sans-photo { width: 100%; height: 220px; object-fit: cover; }
.carte .sans-photo { background: #e9e7e3; display: flex; align-items: center; justify-content: center; color: var(--texte-doux); font-size: 13px; letter-spacing: 0.06em; text-transform: uppercase; }
.carte .corps { padding: 22px 24px 26px; display: flex; flex-direction: column; gap: 8px; }
.carte h3 { font-size: 18px; }
.carte p { font-size: 14px; color: var(--gris); }
.carte .plus { font-size: 13px; font-weight: 600; color: var(--rouge); margin-top: 6px; }

/* Services */
.services { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 48px; }
.services .surtitre { color: var(--rose); }
.services .surtitre::before { background: var(--rose); }
.services h3 { font-size: 22px; color: var(--blanc); margin: 12px 0 10px; }
.services p { font-size: 14px; color: #d8d7d3; }
.services strong { color: var(--blanc); }

/* Partenaires + contact */
.deux-col { display: grid; grid-template-columns: 1fr 1.4fr; gap: 64px; align-items: center; }
.logos { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 16px; }
.logos div { height: 64px; border: 1px solid var(--ligne); background: var(--blanc); display: flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 600; color: var(--gris); }
.logos img { max-height: 44px; width: auto; }
.encart { background: var(--blanc); border: 1px solid var(--ligne); border-radius: 2px; padding: 36px 40px; display: flex; flex-direction: column; gap: 16px; }
.encart h2 { font-size: 26px; }
.encart p { color: var(--gris); font-size: 15px; }
.encart .actions { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }

/* Page produit */
.titre-page { padding: 44px 0 0; display: flex; flex-direction: column; gap: 14px; }
.ariane { font-size: 13px; color: var(--texte-doux); letter-spacing: 0.04em; }
.ariane a { color: var(--texte-doux); }
.titre-page h1 { font-size: 38px; }
.titre-page .chapo { font-size: 17px; color: var(--gris); max-width: 720px; }
.produit { padding: 36px 0 72px; display: grid; grid-template-columns: 1.3fr 1fr; gap: 48px; align-items: start; }
.galerie { display: flex; flex-direction: column; gap: 12px; }
.galerie .principale { width: 100%; height: 460px; object-fit: cover; border-radius: 2px; }
.galerie .vignettes { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.galerie .vignettes img { width: 100%; height: 140px; object-fit: cover; border-radius: 2px; cursor: pointer; }
.galerie .vignettes img:hover { opacity: 0.85; }
.fiche { background: var(--blanc); border: 1px solid var(--ligne); border-radius: 2px; padding: 28px 32px; }
.fiche h2 { font-size: 20px; margin-bottom: 18px; }
.fiche dl { margin: 0; display: flex; flex-direction: column; }
.fiche .ligne { display: grid; grid-template-columns: 140px 1fr; gap: 12px; padding: 12px 0; border-bottom: 1px solid #eeece8; font-size: 14px; }
.fiche .ligne:last-child { border-bottom: 0; }
.fiche dt { color: var(--texte-doux); margin: 0; }
.fiche dd { margin: 0; }
.appel { background: var(--gris); color: var(--blanc); border-radius: 2px; padding: 26px 32px; display: flex; flex-direction: column; gap: 12px; margin-top: 28px; }
.appel h3 { font-size: 18px; color: var(--blanc); }
.appel p { font-size: 14px; color: #d8d7d3; }
.appel .actions { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.appel .actions span { font-size: 14px; font-weight: 600; }
.appel a.tel { color: var(--blanc); }
.voir-aussi { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 16px; font-size: 14px; font-weight: 600; margin-top: 24px; }
.voir-aussi a { color: var(--noir); display: flex; flex-direction: column; gap: 10px; }
.voir-aussi img, .voir-aussi .sans-photo { width: 100%; height: 120px; object-fit: cover; border-radius: 2px; background: #e9e7e3; }
.prose { max-width: 760px; font-size: 15px; color: var(--noir); display: flex; flex-direction: column; gap: 14px; }
.prose h2 { font-size: 22px; margin-top: 18px; }
.prose ul { margin: 0; padding-left: 20px; }

/* Contact */
.contact { padding: 40px 0 72px; display: grid; grid-template-columns: 1fr 1.2fr; gap: 56px; align-items: start; }
.coordonnees { display: flex; flex-direction: column; gap: 22px; font-size: 15px; }
.coordonnees .bloc { display: flex; flex-direction: column; gap: 4px; }
.coordonnees .bloc strong { font-size: 13px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--texte-doux); font-weight: 600; }
.coordonnees a.gros { font-size: 22px; font-weight: 700; color: var(--noir); }
.formulaire { background: var(--blanc); border: 1px solid var(--ligne); border-radius: 2px; padding: 32px; display: flex; flex-direction: column; gap: 18px; }
.champ { display: flex; flex-direction: column; gap: 6px; }
.champ label { font-size: 13px; font-weight: 600; letter-spacing: 0.04em; }
.champ input, .champ textarea, .champ select { font-family: inherit; font-size: 15px; padding: 12px 14px; border: 1px solid var(--ligne); border-radius: 2px; background: var(--fond); color: var(--noir); }
.champ input:focus, .champ textarea:focus { outline: 2px solid var(--rouge); outline-offset: 0; border-color: var(--rouge); }
.champ textarea { min-height: 140px; resize: vertical; }
.deux-champs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.mention { font-size: 12px; color: var(--texte-doux); }
.cache { position: absolute; left: -9999px; }

/* Pied de page */
.pied { background: var(--noir); color: #b9bbb6; font-size: 13px; margin-top: auto; }
.pied .wrap { padding: 40px 24px; display: flex; justify-content: space-between; align-items: center; gap: 40px; flex-wrap: wrap; }
.pied .marque { display: flex; flex-direction: column; gap: 6px; }
.pied .marque strong { color: var(--blanc); letter-spacing: 0.12em; }
.pied a { color: #b9bbb6; }
.pied a:hover { color: var(--blanc); }
.pied .liens { display: flex; gap: 28px; flex-wrap: wrap; }
body { display: flex; flex-direction: column; min-height: 100vh; }

/* Responsive */
@media (max-width: 960px) {
  .hero .wrap, .produit, .contact, .deux-col { grid-template-columns: 1fr; }
  .grille-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .services { grid-template-columns: 1fr; gap: 32px; }
  .voir-aussi { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .hero h1 { font-size: 34px; }
  .hero .visuel img.photo { height: 300px; }
  .galerie .principale { height: 320px; }
}
@media (max-width: 640px) {
  .grille-3, .voir-aussi, .deux-champs, .logos { grid-template-columns: 1fr; }
  .bandeau .zone { display: none; }
  .entete .wrap { height: 64px; }
  .logo img { height: 30px; }
  .burger { display: block; }
  .nav { display: none; position: absolute; top: 64px; left: 0; right: 0; background: var(--blanc); border-bottom: 1px solid var(--ligne); flex-direction: column; align-items: stretch; gap: 0; padding: 8px 24px 16px; }
  .nav.ouvert { display: flex; }
  .nav a { padding: 14px 0; border-bottom: 1px solid var(--ligne); }
  .nav a.btn { margin-top: 12px; text-align: center; }
  .hero h1 { font-size: 30px; }
  .hero .wrap { padding: 40px 24px 48px; }
  .hero .visuel img.picto { display: none; }
  .section { padding: 48px 0; }
  .entete-section h2 { font-size: 26px; }
  .titre-page h1 { font-size: 30px; }
  .fiche .ligne { grid-template-columns: 1fr; gap: 2px; }
  .encart { padding: 24px; }
}