/* Nexus-Solution — charte sombre & premium */
:root{
  --noir:#0a0d12;
  --anthracite:#11161d;
  --carte:#161c25;
  --bordure:#232b36;
  --texte:#e8edf3;
  --texte-doux:#9aa7b6;
  --or:#c9a04e;
  --or-clair:#e3c884;
  --bleu:#3b82f6;
  --max:1200px;
  --r:14px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:'Inter',ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  background:var(--noir);color:var(--texte);line-height:1.6;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
h1,h2,h3,p,a,button{overflow-wrap:break-word}

/* Fond animé (aurores dorées) */
body::before{content:"";position:fixed;inset:-20%;z-index:-2;pointer-events:none;
  background:
    radial-gradient(40% 40% at 20% 25%,rgba(201,160,78,.10),transparent 60%),
    radial-gradient(40% 40% at 80% 70%,rgba(59,130,246,.08),transparent 60%);
  animation:aurora 18s ease-in-out infinite alternate}
@keyframes aurora{
  0%{transform:translate(0,0) scale(1)}
  100%{transform:translate(-4%,3%) scale(1.15)}
}


/* Barre de progression scroll */
#scrollbar{position:fixed;top:0;left:0;height:3px;width:100%;z-index:100;transform-origin:0 0;
  transform:scaleX(0);background:linear-gradient(90deg,var(--or),var(--or-clair))}

/* Cartes : transition fluide pour le tilt JS */
.card,.plogo{will-change:transform;transform-style:preserve-3d}
.card{transition:transform .15s ease,border-color .25s}
.btn-or{will-change:transform}

a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}

/* Header */
.nav{position:sticky;top:0;z-index:50;background:rgba(10,13,18,.78);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--bordure)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:flex-end;gap:9px}
.logo-img{height:38px;width:auto;display:block;transition:transform .3s}
.logo:hover .logo-img{transform:scale(1.04)}
.logo-sub{font-size:13px;font-weight:700;letter-spacing:4px;color:var(--texte-doux);
  padding-bottom:6px}
footer .logo-img{height:34px}
.menu{display:flex;gap:30px;list-style:none}
.menu a{color:var(--texte-doux);font-size:15px;font-weight:500;transition:color .2s}
.menu a:hover,.menu a.active{color:var(--texte)}
.btn{display:inline-block;padding:12px 24px;border-radius:10px;font-weight:600;
  font-size:15px;transition:transform .2s,box-shadow .2s;cursor:pointer;border:none}
.btn-or{background:linear-gradient(135deg,var(--or),var(--or-clair));color:var(--noir);
  box-shadow:0 6px 20px rgba(201,160,78,.25)}
.btn-or:hover{box-shadow:0 10px 28px rgba(201,160,78,.4)}
.btn-ghost{background:transparent;border:1px solid var(--bordure);color:var(--texte)}
.btn-ghost:hover{border-color:var(--or);color:var(--or)}
.burger{display:none;background:none;border:none;color:var(--texte);cursor:pointer;padding:4px}
.burger svg{width:26px;height:26px;display:block}

/* Hero */
.hero{position:relative;min-height:88vh;display:flex;align-items:center;overflow:hidden}
#bg3d{position:absolute;inset:0;z-index:0}
.hero .wrap{position:relative;z-index:2}
.hero-grad{position:absolute;inset:0;z-index:1;pointer-events:none;
  background:radial-gradient(70% 60% at 70% 40%,transparent,var(--noir) 85%)}
.eyebrow{color:var(--or);font-weight:700;letter-spacing:2px;text-transform:uppercase;font-size:13px;margin-bottom:18px}
.hero h1{font-size:clamp(34px,5.5vw,62px);line-height:1.08;font-weight:800;max-width:760px;letter-spacing:-1px}
.hero h1 span{background:linear-gradient(135deg,var(--or),var(--or-clair));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero p{color:var(--texte-doux);font-size:19px;max-width:560px;margin:24px 0 36px}
.cta-row{display:flex;gap:16px;flex-wrap:wrap}

/* Sections */
section{padding:96px 0}
.sec-head{text-align:center;max-width:680px;margin:0 auto 56px}
.sec-head .eyebrow{margin-bottom:12px}
h2{font-size:clamp(28px,4vw,42px);font-weight:800;letter-spacing:-.5px}
.sec-head p{color:var(--texte-doux);font-size:18px;margin-top:14px}
.alt{background:var(--anthracite)}

/* Cards grid */
.grid{display:grid;gap:24px}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--carte);border:1px solid var(--bordure);border-radius:var(--r);
  padding:32px}
.card:hover{border-color:var(--or)}
.card .ico{width:52px;height:52px;border-radius:12px;background:rgba(201,160,78,.12);
  display:grid;place-items:center;color:var(--or);margin-bottom:20px}
.card .ico svg{width:26px;height:26px}
.card h3{font-size:20px;margin-bottom:10px}
.card p{color:var(--texte-doux);font-size:15px}

/* Stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat .n{font-size:46px;font-weight:800;color:var(--or)}
.stat .l{color:var(--texte-doux);font-size:15px;margin-top:6px}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step{position:relative;padding-top:18px}
.step .num{width:44px;height:44px;border-radius:50%;border:2px solid var(--or);
  color:var(--or);display:grid;place-items:center;font-weight:800;margin-bottom:18px}
.step h4{font-size:18px;margin-bottom:8px}
.step p{color:var(--texte-doux);font-size:14px}

/* Partner logos */
.logos{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.plogo{background:var(--carte);border:1px solid var(--bordure);border-radius:12px;
  height:110px;display:grid;place-items:center;color:var(--texte-doux);font-weight:700;
  font-size:18px;transition:.25s}
.plogo:hover{border-color:var(--or);color:var(--texte)}

/* CTA band */
.band{background:linear-gradient(135deg,#15110a,#1c1305);border:1px solid #2a2110;
  border-radius:24px;padding:64px;text-align:center}
.band h2{margin-bottom:14px}
.band p{color:var(--texte-doux);font-size:18px;max-width:560px;margin:0 auto 32px}

/* Page header (sous-pages) */
.phead{position:relative;overflow:hidden;padding:120px 0 64px;text-align:center;border-bottom:1px solid var(--bordure);
  background:radial-gradient(60% 100% at 50% 0%,rgba(201,160,78,.08),transparent)}
.phead #bg3d{position:absolute;inset:0;z-index:0;opacity:.7}
.phead .wrap{position:relative;z-index:2}
.phead h1{font-size:clamp(32px,5vw,52px);font-weight:800;letter-spacing:-1px}
.phead p{color:var(--texte-doux);font-size:18px;margin-top:14px;max-width:600px;margin-left:auto;margin-right:auto}
.crumb{color:var(--texte-doux);font-size:14px;margin-bottom:18px}
.crumb a:hover{color:var(--or)}

/* Forms */
.form{background:var(--carte);border:1px solid var(--bordure);border-radius:var(--r);padding:40px}
.field{margin-bottom:20px}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:8px}
.field input,.field select,.field textarea{width:100%;padding:13px 15px;background:var(--noir);
  border:1px solid var(--bordure);border-radius:10px;color:var(--texte);font-size:15px;font-family:inherit}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--or)}
.field textarea{resize:vertical;min-height:120px}
.info-line{display:flex;align-items:center;gap:14px;margin-bottom:20px;color:var(--texte-doux)}
.info-line .ico{width:44px;height:44px;border-radius:10px;background:rgba(201,160,78,.12);
  display:grid;place-items:center;color:var(--or);flex-shrink:0}
.info-line .ico svg{width:22px;height:22px}

/* Lists */
.check{list-style:none}
.check li{padding-left:30px;position:relative;margin-bottom:12px;color:var(--texte-doux)}
.check li:before{content:"\2713";position:absolute;left:0;color:var(--or);font-weight:800}

/* Footer */
footer{background:#070a0e;border-top:1px solid var(--bordure);padding:64px 0 32px}
.fgrid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
footer h5{font-size:15px;margin-bottom:18px;color:var(--texte)}
footer ul{list-style:none}
footer li{margin-bottom:10px}
footer a{color:var(--texte-doux);font-size:14px}
footer a:hover{color:var(--or)}
.fbottom{border-top:1px solid var(--bordure);padding-top:24px;display:flex;
  justify-content:space-between;color:var(--texte-doux);font-size:13px;flex-wrap:wrap;gap:10px}

/* Reveal animation */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* Responsive */
@media(max-width:900px){
  .g3,.g4,.g2,.stats,.steps,.logos{grid-template-columns:repeat(2,1fr)}
  .fgrid{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .menu{display:none}
  .burger{display:block}
  .menu.open{display:flex;position:absolute;top:72px;left:0;right:0;flex-direction:column;
    background:var(--anthracite);padding:20px 24px;gap:18px;border-bottom:1px solid var(--bordure)}
  .g3,.g4,.g2,.stats,.steps,.logos,.fgrid{grid-template-columns:1fr}
  .nav .wrap{height:64px}
  .menu.open{top:64px}
  .hero{min-height:760px}
  .hero h1{font-size:31px;letter-spacing:0;max-width:100%}
  .hero p{font-size:16px;max-width:100%}
  .cta-row{display:grid;grid-template-columns:1fr;gap:12px}
  .cta-row .btn{width:100%;text-align:center}
  .phead{padding:96px 0 52px}
  .phead h1{font-size:30px;letter-spacing:0}
  .phead p{font-size:16px}
  .band{padding:40px 24px}
  section{padding:64px 0}
}

/* FAQ (accordeon) */
.faq details{background:var(--carte);border:1px solid var(--bordure);border-radius:12px;margin-bottom:14px;overflow:hidden}
.faq summary{list-style:none;cursor:pointer;padding:20px 24px;font-weight:600;font-size:16px;display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--or);font-size:24px;font-weight:400;line-height:1;transition:transform .25s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details[open] summary{color:var(--or)}
.faq details p{padding:0 24px 20px;color:var(--texte-doux);font-size:15px;margin:0}

/* Page legale / RGPD */
.legal h2{font-size:22px;margin:34px 0 12px}
.legal h3{font-size:16px;color:var(--or);margin:22px 0 8px}
.legal p{color:var(--texte-doux);font-size:15px;margin-bottom:12px}
.legal a{color:var(--or)}
.legal a:hover{text-decoration:underline}

/* Bouton thème */
.theme-toggle{background:none;border:1px solid var(--bordure);color:var(--texte-doux);width:38px;height:38px;border-radius:9px;display:grid;place-items:center;cursor:pointer;transition:.2s;padding:0}
.theme-toggle:hover{border-color:var(--or);color:var(--or)}
.theme-toggle svg{width:18px;height:18px}
.ic-sun{display:none}
body.light .ic-sun{display:block}
body.light .ic-moon{display:none}

/* ===== MODE CLAIR ===== */
body.light{--noir:#f4f6f9;--anthracite:#e9edf2;--carte:#ffffff;--bordure:#dde3ea;--texte:#1a2230;--texte-doux:#566173}
body.light .nav{background:rgba(244,246,249,.82);border-bottom-color:var(--bordure)}
body.light .hero-grad{background:radial-gradient(70% 60% at 70% 40%,transparent,#f4f6f9 88%)}
body.light .card{box-shadow:0 2px 14px rgba(20,30,50,.05)}
body.light::before{opacity:.7}