/* Neom BTP — feuille de style principale */
:root{
  --navy:#0a1d2f; --navy-2:#11283f; --ink:#283e61; --muted:#5d6f8a;
  --bg:#f8fcff; --white:#fff; --line:#e3ebf5;
  --blue:#1f5eea; --blue-l:#7aa5ff; --cyan:#3ec6d3; --hl:#2bb3c4;
  --cta:#1f5eea; --cta-h:#174bc0;
  --grad:linear-gradient(120deg,#bff0f0 0%,#c9dcff 100%);
  --r:10px; --shadow:0 6px 24px rgba(10,29,47,.08);
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Open Sans",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--ink);background:var(--bg);font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{color:var(--navy);line-height:1.2;margin:0 0 .6em;font-weight:700}
h2{font-size:clamp(1.6rem,2.6vw,2.3rem)}
h3{font-size:1.2rem}
p{margin:0 0 1em}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.hl{color:var(--hl)}
.dark .hl,.hero .hl{color:var(--cyan)}
.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:12px;z-index:999;background:#fff;padding:8px 12px}

/* Boutons */
.btn{display:inline-flex;align-items:center;gap:.5em;background:var(--cta);color:#fff;font-weight:700;padding:.85em 1.6em;border-radius:6px;border:2px solid var(--cta);font-size:.95rem;cursor:pointer;transition:background .15s}
.btn:hover{background:var(--cta-h);border-color:var(--cta-h);text-decoration:none}
.btn-ghost{background:transparent;color:var(--navy);border-color:var(--cyan)}
.btn-ghost:hover{background:var(--cyan);color:var(--navy);border-color:var(--cyan)}
.dark .btn-ghost,.hero .btn-ghost,.slider .btn-ghost{color:#fff}
.btn-sm{padding:.55em 1.1em;font-size:.85rem}

/* En-tête */
.top{position:sticky;top:0;z-index:50;background:var(--navy);color:#fff}
.top>.wrap{display:flex;align-items:center;gap:28px;height:72px}
.logo{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;letter-spacing:.5px;flex-shrink:0}
.logo:hover{text-decoration:none}
.logo svg{width:34px;height:34px}
.logo .w{font-size:1.15rem}.logo .sep{width:1px;height:20px;background:rgba(255,255,255,.5)}.logo .b{font-weight:600;color:var(--blue-l);letter-spacing:2px}
.nav{display:flex;gap:4px;flex:1}
.nav>li{list-style:none;position:static}
.nav>li>a,.nav>li>button{display:block;color:#fff;font-weight:600;font-size:.92rem;padding:24px 12px;background:none;border:0;cursor:pointer;font-family:inherit;white-space:nowrap}
.nav>li>a:hover,.nav>li>button:hover{color:var(--cyan);text-decoration:none}
.mega{display:none;position:absolute;left:0;right:0;top:72px;background:#fff;color:var(--ink);box-shadow:0 20px 40px rgba(10,29,47,.18);padding:32px 0;border-top:3px solid var(--cyan)}
.nav>li:hover>.mega,.nav>li:focus-within>.mega{display:block}
.mega .cols{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.mega h4{font-size:.75rem;text-transform:uppercase;letter-spacing:1.5px;color:var(--muted);margin:0 0 10px}
.mega ul{list-style:none;margin:0 0 14px;padding:0}
.mega a{color:var(--navy);font-size:.9rem;display:block;padding:3px 0}
.mega a.m1{font-weight:700;margin-top:6px}
.mega a.m2{padding-left:12px;color:var(--ink);font-size:.86rem}
.top .act{display:flex;gap:10px;align-items:center;margin-left:auto}
.top .act .client{color:#fff;border:1px solid rgba(255,255,255,.45);border-radius:6px;padding:.5em .9em;font-size:.85rem;font-weight:600}
.burger{display:none;background:none;border:0;color:#fff;font-size:1.6rem;cursor:pointer;margin-left:auto}

/* Hero */
.hero{position:relative;background:var(--navy);color:#fff;overflow:hidden}
.hero .bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.28}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,29,47,.96) 0%,rgba(10,29,47,.82) 55%,rgba(10,29,47,.45) 100%)}
.hero .wrap{position:relative;z-index:2;padding-top:56px;padding-bottom:64px}
.crumbs{font-size:.8rem;color:#b8c6d8;margin-bottom:18px}
.crumbs a{color:#b8c6d8}.crumbs span{margin:0 6px}
.hero .lab{display:inline-block;font-size:.85rem;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:var(--cyan);margin:0 0 14px}
.hero h1.lab{font-size:.9rem}
.hero .kick{font-size:clamp(1.8rem,3.4vw,2.9rem);color:#fff;max-width:820px;margin:0 0 18px;font-weight:700;line-height:1.15}
.hero .lead{max-width:720px;color:#d8e2ee;font-size:1.05rem}
.hero .ctas{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}

/* Accueil : slider */
.slider{background:var(--navy);color:#fff;position:relative;overflow:hidden}
.slide{display:none}
.slide.on{display:block;animation:fade .5s}
@keyframes fade{from{opacity:0}to{opacity:1}}
.slide .wrap{display:grid;grid-template-columns:1.05fr 1fr;gap:40px;align-items:center;padding-top:60px;padding-bottom:40px}
.slide h1,.slide h2{font-size:clamp(2rem,3.8vw,3.1rem);color:#fff;line-height:1.12}
.slide p{color:#d0dbe8;max-width:520px}
.mock{position:relative;aspect-ratio:4/3;border-radius:16px;overflow:hidden;border:4px solid rgba(62,198,211,.6);box-shadow:0 30px 60px rgba(0,0,0,.35)}
.mock img{width:100%;height:100%;object-fit:cover}
.chip{position:absolute;background:#fff;color:var(--navy);border-radius:8px;padding:8px 12px;font-size:.78rem;font-weight:600;box-shadow:var(--shadow);display:flex;gap:8px;align-items:center}
.chip i{display:inline-block;width:10px;height:10px;border-radius:50%;background:var(--cyan)}
.chip.c1{top:9%;left:-2%}.chip.c2{top:44%;right:-2%}.chip.c3{bottom:9%;left:6%}
.tabs{display:flex;justify-content:center;gap:6px;padding:0 0 26px;position:relative;z-index:2}
.tabs button{background:none;border:0;border-bottom:3px solid rgba(255,255,255,.25);color:#cfd9e6;font-weight:700;font-size:.85rem;padding:8px 18px;cursor:pointer;font-family:inherit}
.tabs button.on{border-color:var(--cyan);color:#fff}

/* Sections */
.sec{padding:72px 0}
.sec.alt{background:#fff}
.sec.grad{background:var(--grad)}
.dark{background:var(--navy);color:#d8e2ee}
.dark h2,.dark h3{color:#fff}
.center{text-align:center}
.eyebrow{font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:1.5px;color:var(--muted);margin-bottom:8px;display:block}
.dark .eyebrow{color:var(--cyan)}
.lead-center{max-width:760px;margin:0 auto 32px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split.r{grid-template-columns:1.1fr .9fr}
.split img{border-radius:var(--r);box-shadow:var(--shadow);width:100%;height:auto;aspect-ratio:3/2;object-fit:cover}
.prose h2{margin-top:1.4em}
.prose ul{padding-left:1.2em;margin:0 0 1.2em}.prose li{margin:.3em 0}
.sources{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin:18px 0 26px}
.sources span{background:#fff;border:1px solid var(--line);border-radius:30px;padding:8px 16px;font-weight:700;font-size:.85rem;color:var(--navy)}

/* Cartes */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cards.c4{grid-template-columns:repeat(4,1fr)}
.cards.c2{grid-template-columns:repeat(2,1fr)}
.card{position:relative;display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px 22px 46px;color:var(--ink);box-shadow:0 2px 10px rgba(10,29,47,.04);transition:transform .15s,box-shadow .15s;min-height:150px}
a.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);text-decoration:none}
.card h3{font-size:1.02rem;margin-bottom:.45em}
.card p{font-size:.9rem;color:var(--muted);margin:0}
.card .go{position:absolute;right:18px;bottom:14px;color:var(--hl);font-size:1.3rem;line-height:1}
.card .cta{position:absolute;left:22px;bottom:16px;font-size:.82rem;font-weight:700;color:var(--blue)}
.card .ico{width:44px;height:44px;margin-bottom:12px;color:var(--hl)}
.grad .card{border-color:transparent}
.dark .card h3{color:var(--navy)}

/* Bénéfices */
.bens{display:grid;grid-template-columns:repeat(3,1fr);gap:0;background:#fff;border-radius:var(--r);box-shadow:var(--shadow);margin-top:-36px;position:relative;z-index:3}
.bens div{padding:24px 26px;border-right:1px solid var(--line)}
.bens div:last-child{border-right:0}
.bens b{display:block;color:var(--hl);font-size:1.25rem}
.bens span{color:var(--navy);font-weight:600}

/* Données associées */
.datal{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0 24px}
.datal a{background:#fff;border:1px solid var(--line);border-radius:6px;padding:9px 14px;font-weight:600;font-size:.88rem;color:var(--navy)}
.datal a:hover{border-color:var(--cyan);text-decoration:none}

/* FAQ */
.faq details{background:#fff;border:1px solid var(--line);border-radius:var(--r);margin-bottom:10px;padding:0 20px}
.faq summary{cursor:pointer;font-weight:700;color:var(--navy);padding:16px 26px 16px 0;list-style:none;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:0;top:12px;font-size:1.4rem;color:var(--hl)}
.faq details[open] summary::after{content:"–"}
.faq details p{padding-bottom:14px}

/* Bandeau démo */
.band{background:var(--navy);color:#fff;border-radius:14px;padding:40px 44px;display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.band h2{color:#fff;margin:0 0 6px;font-size:1.6rem}
.band p{margin:0;color:#c8d4e3}

/* Outils métiers */
.tool{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px;position:relative}
.tool .name{font-size:1.7rem;font-weight:300;color:var(--navy);margin-bottom:12px;letter-spacing:.5px}
.tool .name b{font-weight:800;color:var(--hl)}

/* Newsletter */
.news{display:grid;grid-template-columns:1.5fr 1fr;gap:24px;align-items:start}
.news .box{background:var(--navy);color:#cfd9e6;border-radius:14px;padding:32px}
.news .box b{color:#fff}
.news form{display:flex;gap:10px;margin:18px 0 10px;flex-wrap:wrap}
.news input{flex:1;min-width:200px;padding:12px 14px;border-radius:6px;border:0;font-size:.95rem}
.news small{font-size:.75rem;color:#9fb0c6}
.news .art{background:#fff;border:2px solid var(--cyan);border-radius:14px;padding:24px;display:block;color:var(--navy)}
.news .art:hover{text-decoration:none;box-shadow:var(--shadow)}

/* Article */
.art-wrap{display:grid;grid-template-columns:260px 1fr;gap:48px;align-items:start}
.toc{position:sticky;top:96px;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px;font-size:.88rem}
.toc b{display:block;color:var(--navy);margin-bottom:8px}
.toc a{display:block;color:var(--ink);padding:4px 0}
.meta-art{color:#b8c6d8;font-size:.85rem}
.keypts{background:#fff;border-left:4px solid var(--cyan);border-radius:8px;padding:18px 22px;margin:0 0 28px}
.keypts ul{margin:0;padding-left:1.1em}

/* Formulaires */
.form{background:#fff;border:1px solid var(--line);border-radius:14px;padding:30px;box-shadow:var(--shadow)}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form label{display:block;font-size:.82rem;font-weight:700;color:var(--navy);margin:12px 0 5px}
.form input,.form select,.form textarea{width:100%;padding:11px 12px;border:1px solid #cfd9e6;border-radius:6px;font-size:.95rem;font-family:inherit;color:var(--ink);background:#fff}
.form textarea{min-height:120px;resize:vertical}
.form .chk{display:flex;gap:8px;align-items:flex-start;font-size:.8rem;color:var(--muted);margin:14px 0}
.form .chk input{width:auto;margin-top:4px}
.form .note{font-size:.75rem;color:var(--muted);margin-top:12px}
.ac{position:relative}
.ac-list{position:absolute;left:0;right:0;top:100%;background:#fff;border:1px solid #cfd9e6;border-top:0;border-radius:0 0 6px 6px;z-index:10;max-height:280px;overflow:auto;display:none}
.ac-list.on{display:block}
.ac-list button{display:block;width:100%;text-align:left;background:none;border:0;border-bottom:1px solid var(--line);padding:9px 12px;font-family:inherit;font-size:.88rem;cursor:pointer;color:var(--ink)}
.ac-list button:hover,.ac-list button:focus{background:#eef5ff}
.ac-list small{display:block;color:var(--muted);font-size:.75rem}
.fiche{margin-top:18px;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px;display:none}
.fiche.on{display:block}
.fiche dl{display:grid;grid-template-columns:200px 1fr;gap:8px 16px;margin:0;font-size:.92rem}
.fiche dt{font-weight:700;color:var(--navy)}
.fiche dd{margin:0}

/* Pied de page */
.foot{background:var(--navy);color:#a9b8cb;font-size:.88rem;padding:56px 0 24px;margin-top:0}
.foot .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.foot h4{color:#fff;font-size:.85rem;text-transform:uppercase;letter-spacing:1.3px}
.foot ul{list-style:none;padding:0;margin:0}
.foot li{margin:6px 0}
.foot a{color:#a9b8cb}
.foot a:hover{color:#fff}
.foot .legal{border-top:1px solid rgba(255,255,255,.12);margin-top:36px;padding-top:18px;display:flex;flex-wrap:wrap;gap:18px;justify-content:space-between}
.rdv{position:fixed;right:20px;bottom:20px;z-index:60;background:var(--cta);color:#fff;border-radius:40px;padding:12px 20px;font-weight:700;font-size:.9rem;box-shadow:0 10px 30px rgba(31,94,234,.35)}
.rdv:hover{text-decoration:none;background:var(--cta-h)}
.plan ul{columns:2;list-style:none;padding:0}
.plan li{break-inside:avoid;margin:3px 0}
.plan li.l2{padding-left:16px}.plan li.l3{padding-left:32px;font-size:.92rem}

/* Responsive */
@media (max-width:1140px){
  .nav,.top .act .client{display:none}
  .burger{display:block}
  .top.open .nav{display:block;position:absolute;top:72px;left:0;right:0;background:var(--navy);max-height:calc(100vh - 72px);overflow:auto;padding:8px 0 20px}
  .top.open .nav>li>a,.top.open .nav>li>button{padding:12px 24px}
  .top.open .mega{display:none;position:static;box-shadow:none;padding:4px 24px 12px;background:var(--navy-2);border:0}
  .top.open .nav>li.sub-open>.mega{display:block}
  .top.open .nav>li>a::after,.top.open .nav>li>button::after{content:" +";color:var(--cyan)}
  .top.open .nav>li.sub-open>a::after,.top.open .nav>li.sub-open>button::after{content:" –"}
  .nav>li:hover>.mega,.nav>li:focus-within>.mega{display:none}
  .top.open .mega .cols{grid-template-columns:1fr}
  .top.open .mega a{color:#dbe5f1}.top.open .mega h4{color:var(--cyan)}.top.open .mega h4.e{display:none}
  .slide .wrap,.split,.split.r,.news,.art-wrap{grid-template-columns:1fr}
  .toc{position:static}
  .cards,.cards.c4{grid-template-columns:repeat(2,1fr)}
  .foot .cols{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  body{font-size:16px}
  .wrap{padding:0 16px}
  .top .act .btn{display:none}
  .cards,.cards.c4,.cards.c2,.bens,.form .row{grid-template-columns:1fr}
  .bens div{border-right:0;border-bottom:1px solid var(--line)}
  .sec{padding:52px 0}
  .band{padding:28px 22px}
  .chip{display:none}
  .foot .cols{grid-template-columns:1fr}
  .plan ul{columns:1}
  .fiche dl{grid-template-columns:1fr}
}