/* ============================================================
   XYConsulting — site société mère
   Feuille de style unique · thème sombre
   ============================================================ */
:root{
  --bg:#080E1A; --surface:#0D1626; --surface-2:#111D31; --surface-3:#16243C;
  --border:#1E3050; --border-soft:#172741;
  --ink:#F2F6FC; --ink-2:#C3D2E6; --ink-muted:#8397B4;
  --accent:#4F8CFF; --accent-2:#2DD4BF;
  --accent-soft:rgba(79,140,255,.12); --accent-ring:rgba(79,140,255,.35);
  --font:"Inter","Segoe UI",-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,sans-serif;
  --mono:"JetBrains Mono","SF Mono","Cascadia Code",Consolas,monospace;
  --maxw:1180px; --radius:16px; --radius-sm:10px;
  --shadow:0 20px 50px -20px rgba(0,0,0,.75);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{margin:0;font-family:var(--font);background:var(--bg);color:var(--ink-2);line-height:1.65;font-size:16px;overflow-x:hidden;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:radial-gradient(760px 460px at 12% -8%,rgba(79,140,255,.16),transparent 62%),
             radial-gradient(620px 420px at 92% 4%,rgba(45,212,191,.10),transparent 60%)}
h1,h2,h3,h4{color:var(--ink);line-height:1.18;margin:0 0 .5em;font-weight:650;letter-spacing:-.02em}
p{margin:0 0 1em}
a{color:var(--ink);text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;position:relative;z-index:1}

.skip{position:absolute;left:-9999px;top:0;z-index:100;background:var(--accent);color:#04121f;padding:10px 18px;border-radius:0 0 8px 0;font-weight:600}
.skip:focus{left:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}

/* ---------- Navigation ---------- */
header{position:sticky;top:0;z-index:50;background:rgba(8,14,26,.72);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid transparent;transition:border-color .3s,background .3s}
header.scrolled{border-bottom-color:var(--border-soft);background:rgba(8,14,26,.94)}
.nav{display:flex;align-items:center;gap:26px;height:72px}
.brand{display:flex;align-items:center;gap:11px;font-weight:700;color:var(--ink);font-size:1.02rem;letter-spacing:-.01em;flex-shrink:0}
.brand svg{width:30px;height:30px;flex-shrink:0}
.brand span small{display:block;font-size:.66rem;font-weight:500;color:var(--ink-muted);letter-spacing:.16em;text-transform:uppercase;line-height:1.4}
.nav-links{display:flex;gap:4px;margin-left:auto;align-items:center}
.nav-links a{color:var(--ink-2);font-size:.89rem;font-weight:500;padding:8px 12px;border-radius:8px;transition:color .2s,background .2s}
.nav-links a:hover{color:var(--ink);background:var(--surface-2)}
.nav-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.lang{display:inline-flex;background:var(--surface-2);border:1px solid var(--border-soft);border-radius:9px;padding:3px;gap:2px}
.lang button{font:inherit;font-size:.76rem;font-weight:650;letter-spacing:.05em;background:none;border:0;color:var(--ink-muted);cursor:pointer;padding:5px 11px;border-radius:6px;transition:all .2s}
.lang button[aria-pressed="true"]{background:var(--accent);color:#04121f}
.lang button:not([aria-pressed="true"]):hover{color:var(--ink)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font:inherit;font-size:.9rem;font-weight:600;cursor:pointer;padding:11px 22px;border-radius:10px;border:1px solid transparent;transition:transform .2s,box-shadow .2s,background .2s,border-color .2s;white-space:nowrap}
.btn-primary{background:var(--accent);color:#04121f;box-shadow:0 8px 24px -10px var(--accent-ring)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px -10px var(--accent-ring)}
.btn-ghost{background:var(--surface-2);border-color:var(--border);color:var(--ink)}
.btn-ghost:hover{border-color:var(--accent);background:var(--surface-3)}
.btn-sm{padding:9px 16px;font-size:.83rem}
.burger{display:none;background:var(--surface-2);border:1px solid var(--border-soft);border-radius:9px;width:40px;height:38px;cursor:pointer;align-items:center;justify-content:center}
.burger svg{width:18px;height:18px;stroke:var(--ink)}

/* ---------- Hero ---------- */
.hero{padding:100px 0 84px}
.eyebrow{display:inline-flex;align-items:center;gap:9px;background:var(--accent-soft);border:1px solid var(--accent-ring);color:var(--ink);font-size:.78rem;font-weight:600;letter-spacing:.03em;padding:7px 15px;border-radius:99px;margin-bottom:26px}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--accent-2);box-shadow:0 0 0 4px rgba(45,212,191,.16)}
.hero h1{font-size:clamp(2.25rem,5.2vw,3.85rem);max-width:19ch;margin-bottom:.35em;font-weight:700}
.hero h1 em{font-style:normal;background:linear-gradient(100deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{font-size:clamp(1.02rem,1.9vw,1.2rem);max-width:62ch;color:var(--ink-2);margin-bottom:2.1em}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- Chiffres ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:2px;background:var(--border-soft);border:1px solid var(--border-soft);border-radius:var(--radius);overflow:hidden;margin-top:70px}
.stat{background:var(--surface);padding:26px 24px}
.stat .val{font-size:1.9rem;font-weight:700;color:var(--ink);letter-spacing:-.03em;line-height:1.1;font-variant-numeric:tabular-nums}
.stat .val span{color:var(--accent)}
.stat .lbl{font-size:.81rem;color:var(--ink-muted);margin-top:6px;line-height:1.45}

/* ---------- Sections ---------- */
section{padding:92px 0}
.sec-head{max-width:66ch;margin-bottom:50px}
.sec-tag{font-size:.75rem;font-weight:700;letter-spacing:.15em;text-transform:uppercase;color:var(--accent);display:block;margin-bottom:14px}
.sec-head h2{font-size:clamp(1.7rem,3.4vw,2.45rem)}
.sec-head p{color:var(--ink-muted);font-size:1.03rem;margin-bottom:0}

/* ---------- Thèse ---------- */
.thesis{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:start}
.thesis .body p{color:var(--ink-2);font-size:1.03rem}
.thesis .body p strong{color:var(--ink);font-weight:600}
.principles{display:flex;flex-direction:column;gap:2px;background:var(--border-soft);border:1px solid var(--border-soft);border-radius:var(--radius);overflow:hidden}
.principle{background:var(--surface);padding:24px 26px}
.principle .num{font-family:var(--mono);font-size:.74rem;color:var(--accent);font-weight:700;letter-spacing:.1em;display:block;margin-bottom:9px}
.principle h3{font-size:1.02rem;margin-bottom:6px}
.principle p{font-size:.9rem;color:var(--ink-muted);margin:0}

/* ---------- Produits ---------- */
.products{display:flex;flex-direction:column;gap:22px}
.product{background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--radius);padding:34px 34px 30px;position:relative;overflow:hidden;transition:border-color .28s,box-shadow .28s}
.product::after{content:"";position:absolute;inset:0 0 auto 0;height:2px;background:linear-gradient(90deg,var(--accent),var(--accent-2));opacity:0;transition:opacity .28s}
.product:hover{border-color:var(--border);box-shadow:var(--shadow)}
.product:hover::after{opacity:1}
.p-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:44px;align-items:start}
.p-head{display:flex;align-items:center;gap:14px;margin-bottom:16px;flex-wrap:wrap}
.ico{width:46px;height:46px;border-radius:12px;flex-shrink:0;display:grid;place-items:center;background:var(--accent-soft);border:1px solid var(--accent-ring)}
.ico svg{width:22px;height:22px;stroke:var(--accent);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.p-head h3{font-size:1.5rem;margin:0}
.badge{font-size:.66rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;padding:5px 10px;border-radius:99px;white-space:nowrap;background:var(--surface-3);color:var(--ink-muted);border:1px solid var(--border-soft)}
.badge.live{background:rgba(45,212,191,.11);color:#7EE7DA;border-color:rgba(45,212,191,.3)}
.badge.beta{background:rgba(79,140,255,.11);color:#9CC0FF;border-color:var(--accent-ring)}
.p-tag{font-size:.92rem;color:var(--accent-2);font-weight:600;margin-bottom:14px}
.p-desc{font-size:.97rem;color:var(--ink-2);margin-bottom:18px}
.p-note{font-size:.88rem;color:var(--ink-muted);margin-bottom:22px}
.tags{display:flex;flex-wrap:wrap;gap:7px;margin:0 0 24px;padding:0}
.tags li{list-style:none;font-size:.73rem;color:var(--ink-2);background:var(--surface-2);border:1px solid var(--border-soft);padding:4px 10px;border-radius:6px}
.p-link{display:inline-flex;align-items:center;gap:8px;font-size:.9rem;font-weight:650;color:var(--accent)}
.p-link svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:2;transition:transform .22s}
.p-link:hover svg{transform:translate(3px,-3px)}
.facts{display:flex;flex-direction:column;gap:2px;background:var(--border-soft);border:1px solid var(--border-soft);border-radius:var(--radius-sm);overflow:hidden}
.fact{background:var(--surface-2);padding:15px 18px;display:flex;justify-content:space-between;gap:16px;align-items:baseline}
.fact dt{font-size:.8rem;color:var(--ink-muted);margin:0}
.fact dd{font-size:.87rem;color:var(--ink);margin:0;font-weight:600;text-align:right}

/* ---------- Socle ---------- */
.stack{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2px;background:var(--border-soft);border:1px solid var(--border-soft);border-radius:var(--radius);overflow:hidden}
.layer{background:var(--surface);padding:26px 26px}
.layer h3{font-size:1rem;margin-bottom:8px}
.layer p{font-size:.89rem;color:var(--ink-muted);margin:0 0 12px}
.layer .chips{display:flex;flex-wrap:wrap;gap:6px;padding:0;margin:0}
.layer .chips li{list-style:none;font-family:var(--mono);font-size:.7rem;color:var(--ink-2);background:var(--surface-3);padding:3px 8px;border-radius:5px}

/* ---------- Fondateur ---------- */
.founder{display:grid;grid-template-columns:.85fr 1.15fr;gap:52px;align-items:start}
.founder-card{background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--radius);padding:30px 28px;text-align:center}
.avatar{width:84px;height:84px;border-radius:50%;margin:0 auto 18px;display:grid;place-items:center;font-size:1.7rem;font-weight:700;color:#04121f;background:linear-gradient(135deg,var(--accent),var(--accent-2));letter-spacing:-.02em}
.founder-card h3{font-size:1.2rem;margin-bottom:4px}
.founder-card .role{font-size:.86rem;color:var(--accent-2);font-weight:600;margin-bottom:16px}
.founder-card .meta{font-size:.83rem;color:var(--ink-muted);border-top:1px solid var(--border-soft);padding-top:16px;margin:0}
.certs{display:flex;flex-wrap:wrap;gap:8px;padding:0;margin:22px 0 0}
.certs li{list-style:none;font-size:.75rem;color:var(--ink-2);background:var(--surface-2);border:1px solid var(--border-soft);padding:6px 11px;border-radius:7px}
.founder .body p{font-size:1.02rem;color:var(--ink-2)}

/* ---------- Investisseurs ---------- */
.invest{background:linear-gradient(135deg,var(--surface-2),var(--surface));border:1px solid var(--border);border-radius:22px;padding:52px 48px;position:relative;overflow:hidden}
.invest::before{content:"";position:absolute;inset:-60% 25% auto;height:300px;background:radial-gradient(circle,rgba(79,140,255,.17),transparent 68%);pointer-events:none}
.invest-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;position:relative}
.invest h2{font-size:clamp(1.5rem,2.9vw,2.1rem)}
.invest p{color:var(--ink-2);margin-bottom:0}
.invest .small{font-size:.85rem;color:var(--ink-muted);margin-top:16px}
.invest-actions{display:flex;flex-direction:column;gap:12px}
.invest-actions .btn{width:100%}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:22px}
.contact-card{background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--radius);padding:30px 28px;display:flex;flex-direction:column}
.contact-card h3{font-size:1.1rem;margin-bottom:8px}
.contact-card p{font-size:.92rem;color:var(--ink-muted);flex-grow:1}
.contact-card a.mail{font-size:.92rem;font-weight:650;color:var(--accent);word-break:break-all}

/* ---------- Footer ---------- */
footer{border-top:1px solid var(--border-soft);padding:52px 0 40px}
.foot{display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap;align-items:flex-start}
.foot-brand{max-width:34ch}
.foot-brand p{font-size:.86rem;color:var(--ink-muted);margin:14px 0 0}
.foot-cols{display:flex;gap:56px;flex-wrap:wrap}
.foot-col h4{font-size:.74rem;letter-spacing:.13em;text-transform:uppercase;color:var(--ink-muted);font-weight:700;margin-bottom:14px}
.foot-col a{display:block;font-size:.88rem;color:var(--ink-2);padding:4px 0;transition:color .2s}
.foot-col a:hover{color:var(--accent)}
.foot-bottom{margin-top:44px;padding-top:24px;border-top:1px solid var(--border-soft);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.81rem;color:var(--ink-muted)}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:1000px){
  .thesis,.founder,.p-grid,.invest-grid{grid-template-columns:1fr;gap:34px}
  .stats{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:820px){
  .nav-links{display:none;position:absolute;top:72px;left:0;right:0;flex-direction:column;align-items:stretch;gap:2px;background:rgba(8,14,26,.98);border-bottom:1px solid var(--border-soft);padding:14px 24px 20px;backdrop-filter:blur(14px)}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 10px;font-size:.95rem}
  .burger{display:flex}
  .nav-actions .btn{display:none}
  .hero{padding:64px 0 58px}
  section{padding:68px 0}
  .product{padding:28px 24px 26px}
  .invest{padding:38px 26px}
}
@media (max-width:520px){
  .stats{grid-template-columns:1fr}
  .hero-cta .btn{width:100%}
  .brand span small{display:none}
}

/* ============================================================
   AJOUTS — pages intérieures (solutions, études de cas)
   ============================================================ */

/* Lien de navigation actif */
.nav-links a.actif{color:var(--ink);background:var(--surface-2)}

/* Fil d'Ariane */
.crumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:.84rem;color:var(--ink-muted);padding:26px 0 0}
.crumb a{color:var(--ink-muted);transition:color .2s}
.crumb a:hover{color:var(--accent)}
.crumb span[aria-current]{color:var(--ink-2)}
.crumb i{font-style:normal;opacity:.5}

/* En-tête de page intérieure */
.page-hero{padding:38px 0 62px}
.page-hero h1{font-size:clamp(2rem,4.4vw,3.15rem);max-width:20ch;margin-bottom:.3em}
.page-hero .lead{font-size:clamp(1rem,1.8vw,1.15rem);max-width:64ch;color:var(--ink-2);margin-bottom:28px}
.page-hero .ico{width:54px;height:54px;margin-bottom:22px}
.page-hero .ico svg{width:26px;height:26px}

/* Bandeau de méta-informations */
.meta{display:flex;flex-wrap:wrap;gap:2px;background:var(--border-soft);border:1px solid var(--border-soft);border-radius:var(--radius);overflow:hidden;margin-top:30px}
.meta div{background:var(--surface);padding:16px 20px;flex:1 1 170px}
.meta dt{font-size:.74rem;letter-spacing:.09em;text-transform:uppercase;color:var(--ink-muted);margin:0 0 5px}
.meta dd{margin:0;font-size:.92rem;color:var(--ink);font-weight:600}

/* Texte long */
.prose{max-width:68ch}
.prose h2{font-size:clamp(1.45rem,2.6vw,1.95rem);margin-top:0}
.prose h3{font-size:1.12rem;margin-top:2em}
.prose p{color:var(--ink-2);font-size:1.01rem}
.prose strong{color:var(--ink);font-weight:600}
.prose ul{padding-left:1.1em;margin:0 0 1.4em}
.prose li{color:var(--ink-2);margin-bottom:.55em;font-size:1rem}
.prose li::marker{color:var(--accent)}
.prose code{font-family:var(--mono);font-size:.86em;background:var(--surface-2);border:1px solid var(--border-soft);padding:2px 6px;border-radius:5px;color:var(--ink)}

/* Section en deux colonnes */
.split{display:grid;grid-template-columns:1.25fr .75fr;gap:52px;align-items:start}
.aside{background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--radius);padding:26px 26px;position:sticky;top:96px}
.aside h3{font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-muted);margin-bottom:16px}
.aside ul{list-style:none;padding:0;margin:0}
.aside li{font-size:.9rem;color:var(--ink-2);padding:9px 0;border-top:1px solid var(--border-soft)}
.aside li:first-child{border-top:0;padding-top:0}
.aside li b{display:block;color:var(--ink);font-weight:600;font-size:.86rem;margin-bottom:2px}

/* Étapes numérotées */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:2px;background:var(--border-soft);border:1px solid var(--border-soft);border-radius:var(--radius);overflow:hidden}
.step{background:var(--surface);padding:28px 26px}
.step .n{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:9px;background:var(--accent-soft);border:1px solid var(--accent-ring);color:var(--accent);font-family:var(--mono);font-size:.82rem;font-weight:700;margin-bottom:15px}
.step h3{font-size:1.04rem;margin-bottom:7px}
.step p{font-size:.91rem;color:var(--ink-muted);margin:0}

/* Encadré d'attention */
.callout{border:1px solid var(--border);border-left:3px solid var(--accent);background:var(--surface);border-radius:var(--radius);padding:22px 26px;margin:0 0 1.6em}
.callout p{margin:0;font-size:.96rem;color:var(--ink-2)}
.callout p+p{margin-top:.8em}
.callout b{color:var(--ink)}

/* Tableau */
.tbl{width:100%;border-collapse:collapse;font-size:.9rem;border:1px solid var(--border-soft);border-radius:var(--radius);overflow:hidden}
.tbl th{text-align:left;background:var(--surface-2);color:var(--ink);font-weight:600;font-size:.78rem;letter-spacing:.06em;text-transform:uppercase;padding:13px 16px;border-bottom:1px solid var(--border-soft)}
.tbl td{padding:13px 16px;color:var(--ink-2);border-bottom:1px solid var(--border-soft);vertical-align:top}
.tbl tr:last-child td{border-bottom:0}
.tbl td:first-child{color:var(--ink);font-weight:600;white-space:nowrap}
.tbl-wrap{overflow-x:auto;margin:0 0 1.6em}

/* Cartes d'études de cas */
.cases{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:22px}
.case{background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--radius);padding:30px 28px;display:flex;flex-direction:column;transition:transform .28s,border-color .28s,box-shadow .28s}
.case:hover{transform:translateY(-4px);border-color:var(--border);box-shadow:var(--shadow)}
.case .k{font-size:.72rem;font-weight:700;letter-spacing:.11em;text-transform:uppercase;color:var(--accent);margin-bottom:12px}
.case h3{font-size:1.16rem;margin-bottom:10px}
.case p{font-size:.93rem;color:var(--ink-muted);flex-grow:1;margin-bottom:18px}

/* Bandeau d'appel à l'action */
.cta{background:linear-gradient(135deg,var(--surface-2),var(--surface));border:1px solid var(--border);border-radius:22px;padding:46px 44px;text-align:center;position:relative;overflow:hidden}
.cta::before{content:"";position:absolute;inset:-60% 28% auto;height:280px;background:radial-gradient(circle,rgba(79,140,255,.16),transparent 68%);pointer-events:none}
.cta h2{font-size:clamp(1.4rem,2.7vw,2rem);position:relative}
.cta p{max-width:54ch;margin:0 auto 26px;color:var(--ink-muted);position:relative}
.cta .acts{display:flex;gap:13px;justify-content:center;flex-wrap:wrap;position:relative}

/* Navigation entre pages sœurs */
.sib{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.sib a{background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--radius-sm);padding:20px 22px;transition:border-color .25s,background .25s}
.sib a:hover{border-color:var(--accent-ring);background:var(--surface-2)}
.sib .k{font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-muted);display:block;margin-bottom:6px}
.sib strong{color:var(--ink);font-size:1rem;font-weight:600}

@media (max-width:1000px){
  .split{grid-template-columns:1fr;gap:34px}
  .aside{position:static}
}
@media (max-width:820px){
  .page-hero{padding:22px 0 44px}
  .cta{padding:34px 24px}
}