/* Satna NG — démo v2. DA : produit mis en scène (Ecocapsule) + rigueur B2B alpine (Doppelmayr). */
:root {
  --blanc: #ffffff;
  --ciel: #eef2f5;
  --ligne: #d6dee4;
  --texte: #12202b;
  --gris: #51606b;
  --bleu: #0a4c86;
  --bleu-fonce: #073a68;
  --nuit: #0d1a24;
  --nuit-2: #142734;
  --meleze: #b27a45;
  --eau: #4fb0d0;
  --font: 'Albert Sans', 'Helvetica Neue', Arial, sans-serif;
  --wrap: 1320px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body { margin: 0; background: var(--blanc); color: var(--texte); font: 400 17.5px/1.6 var(--font); -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; }
a { color: inherit; }
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--bleu); outline-offset: 3px; }
/* fonds sombres : contour eau (7:1 sur nuit) */
.sombre :focus-visible, .hero :focus-visible, .top:not(.plein) :focus-visible, .location :focus-visible, .resultat :focus-visible { outline-color: var(--eau); }
.mobile-seul { display: none; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 32px; }
h1, h2, h3 { margin: 0; font-weight: 700; letter-spacing: -.025em; line-height: 1.04; }
h2 { font-size: clamp(34px, 4vw, 58px); }
h3 { font-size: 26px; letter-spacing: -.015em; }
p { margin: 0 0 1em; max-width: 64ch; }
.chapo { font-size: 20px; color: var(--gris); margin-top: 20px; max-width: 56ch; }
.sombre .chapo { color: #a9b9c5; }
section { padding: 120px 0; }
.credit { font-size: 12px; color: #fff; background: rgba(13,26,36,.6); padding: 3px 8px; border-radius: 3px; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 54px; padding: 0 28px; border-radius: 3px; border: 0; background: var(--bleu); color: #fff; font-weight: 600; text-decoration: none; cursor: pointer; transition: background .2s var(--ease), color .2s var(--ease); }
.btn:hover { background: var(--bleu-fonce); }
.btn.blanc { background: #fff; color: var(--texte); }
.btn.blanc:hover { background: var(--ciel); }
.btn.contour { background: transparent; color: var(--texte); box-shadow: inset 0 0 0 1.5px var(--texte); }
.btn.contour:hover { background: var(--texte); color: #fff; }
.fleche { color: var(--bleu); font-weight: 600; text-decoration: none; display: inline-flex; gap: 8px; align-items: center; }
.fleche:hover { text-decoration: underline; text-underline-offset: 5px; }
.fleche svg { width: 18px; height: 18px; }

/* En-tête */
.top { position: fixed; inset: 0 0 auto; z-index: 30; color: #fff; transition: background .3s var(--ease), color .3s var(--ease), box-shadow .3s var(--ease); }
.top::before { content: ''; position: absolute; inset: 0 0 -40px; background: linear-gradient(rgba(13,26,36,.55), transparent); pointer-events: none; transition: opacity .3s; }
.top.plein { background: #fff; color: var(--texte); box-shadow: 0 1px 0 var(--ligne); }
.top.plein::before { opacity: 0; }
.top .wrap { position: relative; display: flex; align-items: center; gap: 34px; height: 80px; }
.logo { display: flex; align-items: center; gap: 12px; text-decoration: none; font-weight: 800; font-size: 21px; letter-spacing: .04em; }
.logo svg { width: 34px; height: 34px; }
.nav { display: flex; gap: 30px; margin-left: auto; font-size: 15.5px; font-weight: 500; }
.nav a { text-decoration: none; }
.nav a:hover { text-decoration: underline; text-underline-offset: 7px; }
.top .tel { font-weight: 600; text-decoration: none; white-space: nowrap; font-size: 15.5px; }
.top .btn { min-height: 46px; padding: 0 22px; font-size: 15px; }
.top:not(.plein) .btn { background: #fff; color: var(--texte); }
.burger { display: none; margin-left: auto; background: none; border: 0; padding: 6px; cursor: pointer; color: inherit; }
.burger svg { width: 28px; height: 28px; }

/* Hero produit plein écran */
.hero { position: relative; height: max(680px, 100vh); height: max(680px, 100svh); color: #fff; overflow: hidden; padding: 0; }
.hero > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 62% center; }
.hero::after { content: ''; position: absolute; inset: 0; background:
  linear-gradient(90deg, rgba(13,26,36,.72) 0, rgba(13,26,36,.35) 42%, rgba(13,26,36,0) 65%),
  linear-gradient(0deg, rgba(13,26,36,.55) 0, rgba(13,26,36,0) 35%); }
.hero .wrap { position: relative; z-index: 2; height: 100%; display: flex; flex-direction: column; justify-content: flex-end; padding-bottom: 170px; }
.hero .gamme-nom { font-size: 18px; font-weight: 600; opacity: .9; }
.hero h1 { font-size: clamp(76px, 12vw, 190px); letter-spacing: -.05em; line-height: .86; margin: 10px 0 24px; }
.hero p { font-size: 21px; max-width: 34ch; color: #e8eef2; }
.hero .actions { display: flex; gap: 12px; margin-top: 30px; flex-wrap: wrap; }
.hero .credit { position: absolute; z-index: 2; right: 24px; bottom: 132px; }

/* Bande de faits sous le hero */
.faits { position: relative; z-index: 3; margin-top: -110px; padding: 0; }
.faits ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); background: #fff; border-radius: 4px; box-shadow: 0 30px 60px -40px rgba(13,26,36,.5); overflow: hidden; }
.faits li { padding: 30px 32px; border-right: 1px solid var(--ligne); }
.faits li:last-child { border-right: 0; }
.faits b { display: block; font-size: 44px; font-weight: 700; letter-spacing: -.03em; line-height: 1; }
.faits span { display: block; margin-top: 10px; color: var(--gris); font-size: 15.5px; }

/* Applications (onglets) */
.applis .tete { display: flex; justify-content: space-between; align-items: end; gap: 40px; flex-wrap: wrap; }
.onglets { display: flex; gap: 8px 30px; border-bottom: 1px solid var(--ligne); flex-wrap: wrap; margin: 50px 0 28px; }
.onglets button { background: none; border: 0; border-bottom: 2px solid transparent; border-radius: 0; margin-bottom: -1px; padding: 12px 2px; font-weight: 600; font-size: 15.5px; cursor: pointer; color: var(--gris); transition: background .2s, color .2s; }
.onglets button[aria-pressed="true"] { color: var(--texte); border-color: var(--texte); }
.panneau-appli { display: grid; grid-template-columns: 1.35fr 1fr; border-radius: 4px; overflow: hidden; background: var(--ciel); min-height: 460px; }
.panneau-appli figure { margin: 0; position: relative; }
.panneau-appli img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; }
.panneau-appli .txt { padding: 54px; display: flex; flex-direction: column; justify-content: center; }
.panneau-appli h3 { font-size: 34px; margin-bottom: 16px; }
.panneau-appli p { color: var(--gris); }
.panneau-appli ul { list-style: none; padding: 0; margin: 10px 0 30px; display: grid; gap: 10px; }
.panneau-appli li { display: flex; gap: 12px; align-items: baseline; }
.panneau-appli li::before { content: ''; flex: none; width: 8px; height: 8px; border-radius: 50%; background: var(--bleu); transform: translateY(-2px); }

/* Gamme */
.gamme { background: var(--ciel); }
.produits { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 56px; }
.produit { background: #fff; border-radius: 4px; overflow: hidden; display: flex; flex-direction: column; text-decoration: none; transition: transform .35s var(--ease); }
.produit figure { position: relative; margin: 0; aspect-ratio: 4 / 4.4; overflow: hidden; background: var(--ligne); }
.produit img { width: 100%; height: 100%; object-fit: cover; }
.produit .corps { padding: 28px 30px 30px; display: flex; flex-direction: column; flex: 1; }
.produit .usage { color: var(--gris); font-size: 15.5px; margin: 8px 0 22px; }
.produit dl { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 20px; margin: 0 0 26px; padding-top: 20px; border-top: 1px solid var(--ligne); }
.produit dt { font-size: 13.5px; color: var(--gris); }
.produit dd { margin: 2px 0 0; font-weight: 600; }
.produit .prix { margin-top: auto; display: flex; justify-content: space-between; align-items: baseline; gap: 10px; }
.produit .prix b { font-size: 26px; letter-spacing: -.02em; }
.produit .prix small { color: var(--gris); font-size: 14px; }
.location { margin-top: 22px; background: var(--nuit); color: #fff; border-radius: 4px; display: grid; grid-template-columns: 1fr auto; gap: 30px; align-items: center; padding: 34px 40px; }
.location p { margin: 6px 0 0; color: #a9b9c5; }

/* Technologie (bande sombre) */
.sombre { background: var(--nuit); color: #e7eef3; }
.sombre h2 { color: #fff; }
.techno .grille { display: grid; grid-template-columns: 1fr 1.1fr; gap: 80px; align-items: center; }
.etapes { list-style: none; counter-reset: e; padding: 0; margin: 44px 0 0; display: grid; gap: 6px; }
.etapes li { counter-increment: e; display: grid; grid-template-columns: 50px 1fr; gap: 14px; padding: 20px 18px; border-radius: 4px; cursor: pointer; transition: background .25s var(--ease); }
.etapes li::before { content: counter(e); width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center; border: 1.5px solid #5e7484; font-weight: 700; font-size: 15px; color: #a9b9c5; }
.etapes li[aria-current="true"] { background: var(--nuit-2); }
.etapes li[aria-current="true"]::before { background: var(--eau); border-color: var(--eau); color: var(--nuit); }
.etapes strong { display: block; font-size: 19px; color: #fff; font-weight: 600; }
.etapes span { color: #a9b9c5; font-size: 16px; }
.coupe { width: 100%; height: auto; background: var(--nuit-2); border-radius: 4px; padding: 18px; }
.coupe .zone { transition: opacity .4s var(--ease); }
.coupe[data-etape="1"] .z2, .coupe[data-etape="1"] .z3,
.coupe[data-etape="2"] .z1, .coupe[data-etape="2"] .z3,
.coupe[data-etape="3"] .z1, .coupe[data-etape="3"] .z2 { opacity: .15; }
.flux { stroke-dasharray: 6 10; animation: flux 1.6s linear infinite; }
.goutte { animation: goutte 2.2s var(--ease) infinite; }
@keyframes flux { to { stroke-dashoffset: -32; } }
@keyframes goutte { 0% { transform: translateY(0); opacity: 0; } 20% { opacity: 1; } 80% { opacity: 1; } 100% { transform: translateY(46px); opacity: 0; } }
.mesures { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 90px; border-top: 1px solid #2a3f4e; }
.mesures div { padding: 34px 26px 0 0; }
.mesures b { display: block; font-size: 56px; font-weight: 700; letter-spacing: -.04em; line-height: 1; color: #fff; }
.mesures b small { font-size: 22px; letter-spacing: 0; margin-left: 4px; color: #a9b9c5; font-weight: 600; }
.mesures span { display: block; margin-top: 12px; color: #a9b9c5; font-size: 15.5px; max-width: 24ch; }

/* Pose : visuel plein cadre + parcours */
.pose { padding: 0; }
.pose-visuel { position: relative; height: min(78vh, 760px); color: #fff; overflow: hidden; }
.pose-visuel img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.pose-visuel::after { content: ''; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(13,26,36,.7) 0, rgba(13,26,36,.2) 50%, rgba(13,26,36,0) 70%); }
.pose-visuel .wrap { position: relative; z-index: 2; height: 100%; display: flex; flex-direction: column; justify-content: center; }
.pose-visuel h2 { color: #fff; max-width: 13ch; }
.pose-visuel p { color: #e3eaef; font-size: 20px; max-width: 40ch; margin-top: 20px; }
.pose-visuel .credit { position: absolute; z-index: 2; right: 24px; bottom: 20px; }
.parcours { list-style: none; counter-reset: p; margin: 0; padding: 70px 0 120px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.parcours li { counter-increment: p; border-top: 2px solid var(--texte); padding-top: 22px; }
.parcours li::before { content: counter(p, decimal-leading-zero); display: block; font-size: 15px; font-weight: 700; color: var(--bleu); margin-bottom: 14px; }
.parcours strong { display: block; font-size: 21px; font-weight: 650; margin-bottom: 8px; letter-spacing: -.01em; }
.parcours span { color: var(--gris); font-size: 16px; }

/* Entreprise : faits */
.entreprise { background: var(--ciel); }
.entreprise .grille { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.entreprise figure { margin: 0; border-radius: 4px; overflow: hidden; aspect-ratio: 4 / 3.2; }
.entreprise figure img { width: 100%; height: 100%; object-fit: cover; }
.chiffres { display: grid; grid-template-columns: 1fr 1fr; gap: 34px 40px; margin-top: 44px; }
.chiffres b { display: block; font-size: 52px; font-weight: 700; letter-spacing: -.04em; line-height: 1; }
.chiffres span { display: block; margin-top: 10px; color: var(--gris); font-size: 15.5px; }

/* Simulateur */
.simu .grille { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; margin-top: 56px; }
.simu form { display: grid; gap: 30px; align-content: start; }
.simu label, .simu legend { display: block; font-weight: 600; padding: 0; }
.simu fieldset { border: 0; margin: 0; padding: 0; }
.simu output.val { float: right; font-weight: 700; color: var(--bleu); font-size: 20px; }
.simu input[type="range"] { width: 100%; margin-top: 14px; accent-color: var(--bleu); }
.choix { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.choix label { position: relative; font-weight: 500; }
.choix input { position: absolute; opacity: 0; }
.choix span { display: inline-block; padding: 11px 18px; border-radius: 3px; background: var(--ciel); cursor: pointer; font-size: 15.5px; }
.choix input:checked + span { background: var(--texte); color: #fff; }
.choix input:focus-visible + span { outline: 2px solid var(--bleu); outline-offset: 2px; }
.resultat { background: var(--nuit); color: #e7eef3; border-radius: 4px; padding: 44px; position: sticky; top: 110px; align-self: start; }
.resultat .gros { font-weight: 700; font-size: 92px; line-height: 1; letter-spacing: -.05em; color: #fff; }
.resultat .gros small { font-size: 24px; letter-spacing: 0; font-weight: 600; color: #a9b9c5; margin-left: 10px; }
.resultat dl { display: grid; grid-template-columns: auto 1fr; gap: 14px 26px; margin: 30px 0; padding: 24px 0; border-top: 1px solid #2a3f4e; border-bottom: 1px solid #2a3f4e; }
.resultat dt { color: #a9b9c5; font-size: 15px; }
.resultat dd { margin: 0; font-weight: 600; }
.resultat .btn { width: 100%; background: #fff; color: var(--texte); }
.resultat .btn:hover { background: var(--ciel); }
.resultat .note { font-size: 13.5px; color: #8fa2b0; margin: 16px 0 0; }

/* Références */
.refs { padding-top: 0; }
.refs .grille { display: grid; grid-template-columns: repeat(12, 1fr); grid-auto-rows: 280px; gap: 16px; margin-top: 50px; }
.refs figure { margin: 0; position: relative; border-radius: 4px; overflow: hidden; }
.refs figure img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s var(--ease); }
.refs figure:hover img { transform: scale(1.03); }
.refs figure:nth-child(1) { grid-column: span 5; grid-row: span 2; }
.refs figure:nth-child(2) { grid-column: span 4; }
.refs figure:nth-child(3) { grid-column: span 3; }
.refs figure:nth-child(4) { grid-column: span 3; }
.refs figure:nth-child(5) { grid-column: span 4; }
.refs figcaption { position: absolute; left: 0; right: 0; bottom: 0; padding: 40px 18px 16px; color: #fff; background: linear-gradient(transparent, rgba(13,26,36,.7) 40%, rgba(13,26,36,.92)); font-size: 14.5px; }
.refs figcaption b { display: block; font-size: 17px; }

/* Docs + FAQ */
.ressources .grille { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; }
.ressources .h3 { font-size: 30px; margin-bottom: 26px; letter-spacing: -.015em; }
.docs { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.docs a { display: grid; grid-template-columns: 44px 1fr auto; gap: 16px; align-items: center; padding: 18px 20px; background: var(--ciel); border-radius: 4px; text-decoration: none; transition: background .2s; }
.docs a:hover { background: #e2e9ee; }
.docs svg { width: 30px; height: 30px; stroke: var(--bleu); }
.docs strong { display: block; font-weight: 600; }
.docs span { color: var(--gris); font-size: 14.5px; }
.docs em { font-style: normal; font-size: 13.5px; color: var(--gris); white-space: nowrap; }
.faq details { border-top: 1px solid var(--ligne); padding: 20px 0; }
.faq details:last-child { border-bottom: 1px solid var(--ligne); }
.faq summary { cursor: pointer; font-weight: 600; font-size: 18.5px; list-style: none; display: flex; justify-content: space-between; gap: 18px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; font-size: 28px; line-height: 1; font-weight: 300; transition: transform .25s var(--ease); }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin: 12px 0 0; color: var(--gris); }

/* Contact */
.contact .grille { display: grid; grid-template-columns: 1fr 1.25fr; gap: 80px; }
.coord { list-style: none; padding: 0; margin: 40px 0 0; display: grid; gap: 22px; }
.coord li { display: grid; gap: 2px; }
.coord small { color: #a9b9c5; font-size: 14px; }
.coord a, .coord span { color: #fff; text-decoration: none; font-weight: 600; font-size: 20px; }
.contact form { background: #fff; color: var(--texte); border-radius: 4px; padding: 44px; display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.contact form h3 { grid-column: 1 / -1; font-size: 26px; margin-bottom: 4px; }
.contact label { font-size: 14px; color: var(--gris); display: block; }
.contact label small { font-size: 12.5px; }
.contact .plein { grid-column: 1 / -1; }
.contact input, .contact select, .contact textarea { display: block; width: 100%; margin-top: 6px; border: 1px solid #7b8a95; border-radius: 3px; padding: 13px 14px; background: var(--ciel); color: var(--texte); }
.contact form .btn { grid-column: 1 / -1; }
.contact .ok { grid-column: 1 / -1; background: #e3f1ea; color: #1d5a3c; padding: 14px 16px; border-radius: 3px; margin: 0; }
.contact .note { grid-column: 1 / -1; font-size: 13px; color: var(--gris); margin: 0; }

.pied { background: var(--nuit); color: #a9b9c5; padding: 50px 0; font-size: 14.5px; border-top: 1px solid #22394a; }
.pied .wrap { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.pied a { text-decoration: none; }
.pied a:hover { color: #fff; }

@media (max-width: 1080px) {
  .nav, .top .tel, .top .btn { display: none; }
  .burger { display: block; }
  .nav.ouvert { display: flex; flex-direction: column; gap: 0; position: absolute; top: 80px; left: 0; right: 0; background: #fff; color: var(--texte); box-shadow: 0 20px 30px -20px rgba(0,0,0,.3); }
  .nav.ouvert a { padding: 16px 32px; border-top: 1px solid var(--ligne); }
  .nav.ouvert .mobile-seul { display: block; font-weight: 700; color: var(--bleu); }
  .faits ul { grid-template-columns: 1fr 1fr; }
  .faits li:nth-child(2) { border-right: 0; }
  .faits li:nth-child(-n+2) { border-bottom: 1px solid var(--ligne); }
  .panneau-appli, .techno .grille, .entreprise .grille, .simu .grille, .ressources .grille, .contact .grille { grid-template-columns: 1fr; gap: 50px; }
  .panneau-appli { gap: 0; }
  .panneau-appli figure { min-height: 320px; }
  .produits { grid-template-columns: 1fr 1fr; }
  .mesures, .parcours { grid-template-columns: 1fr 1fr; row-gap: 40px; }
  .resultat { position: static; }
  .refs .grille { grid-template-columns: 1fr 1fr; grid-auto-rows: 240px; }
  .refs figure:nth-child(n) { grid-column: auto; grid-row: auto; }
}
@media (max-width: 640px) {
  body { font-size: 16.5px; }
  .wrap { padding: 0 18px; }
  section { padding: 84px 0; }
  .hero .wrap { padding-bottom: 150px; }
  .hero > img { object-position: 80% center; }
  .hero::after { background: linear-gradient(0deg, rgba(13,26,36,.88) 0, rgba(13,26,36,.6) 55%, rgba(13,26,36,.3) 100%); }
  .faits b { white-space: nowrap; }
  .hero p { font-size: 18.5px; }
  .faits { margin-top: -90px; }
  .faits li { padding: 22px 18px; }
  .faits b { font-size: 34px; }
  .panneau-appli .txt { padding: 32px 24px; }
  .produits { grid-template-columns: 1fr; }
  .location { grid-template-columns: 1fr; padding: 28px; }
  .mesures b { font-size: 44px; }
  .parcours { grid-template-columns: 1fr; padding: 50px 0 84px; }
  .resultat { padding: 30px; }
  .resultat .gros { font-size: 70px; }
  .refs .grille { grid-template-columns: 1fr; }
  .contact form { grid-template-columns: 1fr; padding: 28px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

.produit .credit { position: absolute; left: 12px; bottom: 12px; }
@media (max-width: 1080px) {
  .pose-visuel::after { background: linear-gradient(0deg, rgba(13,26,36,.4) 0, rgba(13,26,36,.82) 45%, rgba(13,26,36,.55) 100%); }
}
.contact form :focus-visible { outline-color: var(--bleu); }