:root{
  --bg:#0a0f1c;--bg2:#0e1526;--panel:#111a2e;--line:#1e2a44;
  --text:#e6ecf5;--muted:#93a1ba;--accent:#2dd4bf;--accent2:#38bdf8;
  --radius:14px;--wrap:1140px;
  --font:ui-sans-serif,-apple-system,"Segoe UI",Inter,Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{background:var(--bg);color:var(--text);font:16px/1.65 var(--font);-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-999px;top:8px;background:var(--accent);color:#04201c;padding:8px 14px;border-radius:8px;z-index:100}
.skip:focus{left:8px}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}

/* Nav */
.nav{position:fixed;inset:0 0 auto;z-index:50;transition:background .25s,border-color .25s;border-bottom:1px solid transparent}
.nav.scrolled{background:rgba(10,15,28,.82);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-color:var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:.02em;font-size:1.05rem}
.brand b{font-weight:400;color:var(--muted);margin-left:6px}
.logo{width:30px;height:30px;color:var(--accent)}
.menu{display:flex;align-items:center;gap:28px;font-size:.95rem}
.menu a:not(.btn){color:var(--muted);transition:color .2s}
.menu a:not(.btn):hover,.menu a.active{color:var(--text)}
.burger{display:none;background:none;border:0;width:40px;height:40px;cursor:pointer;position:relative}
.burger span{position:absolute;left:10px;right:10px;height:2px;background:var(--text);transition:transform .25s}
.burger span:first-child{top:15px}.burger span:last-child{top:23px}
.burger[aria-expanded=true] span:first-child{transform:translateY(4px) rotate(45deg)}
.burger[aria-expanded=true] span:last-child{transform:translateY(-4px) rotate(-45deg)}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:10px;padding:13px 22px;border-radius:10px;font-weight:600;font-size:.97rem;
  background:linear-gradient(135deg,var(--accent),var(--accent2));color:#04201c;transition:transform .2s,box-shadow .2s}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 30px -10px rgba(45,212,191,.6)}
.btn-sm{padding:8px 16px;font-size:.9rem}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--accent);box-shadow:none}
.btn-li{background:#0a66c2;color:#fff}
.btn-li:hover{box-shadow:0 10px 30px -10px rgba(10,102,194,.8)}
.btn-li svg{width:18px;height:18px}

/* Hero */
.hero{position:relative;min-height:100vh;min-height:100svh;display:flex;align-items:center;padding:120px 0 80px;overflow:hidden}
.grid-bg{position:absolute;inset:0;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:56px 56px;opacity:.45;
  mask-image:radial-gradient(ellipse 70% 60% at 50% 40%,#000 30%,transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 40%,#000 30%,transparent 75%)}
.hero::after{content:"";position:absolute;width:620px;height:620px;right:-160px;top:-120px;border-radius:50%;
  background:radial-gradient(circle,rgba(45,212,191,.18),transparent 65%);pointer-events:none}
.hero-inner{position:relative;z-index:1}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font:500 .85rem var(--mono);color:var(--accent);
  padding:6px 14px;border:1px solid rgba(45,212,191,.3);border-radius:99px;background:rgba(45,212,191,.06)}
.dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 0 rgba(45,212,191,.6);animation:pulse 2s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 8px rgba(45,212,191,0)}100%{box-shadow:0 0 0 0 rgba(45,212,191,0)}}
h1{font-size:clamp(2.3rem,6vw,4.4rem);line-height:1.08;letter-spacing:-.025em;margin:26px 0 22px;font-weight:750;max-width:16ch}
h1 em{font-style:normal;background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:clamp(1.05rem,1.6vw,1.2rem);color:var(--muted);max-width:60ch}
.cta{display:flex;flex-wrap:wrap;gap:14px;margin:36px 0 52px}
.pillars{display:flex;flex-wrap:wrap;gap:10px 28px;font:500 .85rem var(--mono);color:var(--muted)}
.pillars li::before{content:"› ";color:var(--accent)}

/* Sections */
.section{padding:110px 0}
.section.alt{background:var(--bg2);border-block:1px solid var(--line)}
.sec-head{max-width:680px;margin-bottom:56px}
.kicker{font:600 .8rem var(--mono);text-transform:uppercase;letter-spacing:.14em;color:var(--accent);margin-bottom:12px}
h2{font-size:clamp(1.7rem,3.4vw,2.5rem);line-height:1.18;letter-spacing:-.02em;margin-bottom:16px;font-weight:700}
.sec-head p,.split p{color:var(--muted)}

/* Cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:30px 28px;transition:border-color .25s,transform .25s}
.card:hover{border-color:rgba(45,212,191,.45);transform:translateY(-4px)}
.card-accent{background:linear-gradient(160deg,rgba(45,212,191,.1),var(--panel) 60%)}
.ico{width:46px;height:46px;border-radius:11px;display:grid;place-items:center;background:rgba(45,212,191,.1);margin-bottom:20px}
.ico svg{width:24px;height:24px;fill:none;stroke:var(--accent);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.card h3{font-size:1.2rem;margin-bottom:10px}
.card p{color:var(--muted);font-size:.96rem;margin-bottom:18px}
.card ul{border-top:1px solid var(--line);padding-top:16px;display:grid;gap:7px;font-size:.9rem}
.card li{padding-left:20px;position:relative}
.card li::before{content:"";position:absolute;left:2px;top:.62em;width:7px;height:7px;border-radius:2px;background:var(--accent);opacity:.8}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:s}
.steps li{padding:28px 24px;border-radius:var(--radius);border:1px solid var(--line);background:var(--bg);position:relative}
.num{font:600 .9rem var(--mono);color:var(--accent);display:block;margin-bottom:16px}
.steps h3{font-size:1.15rem;margin-bottom:8px}
.steps p{color:var(--muted);font-size:.94rem}

/* Expertise */
.split{display:grid;grid-template-columns:1.1fr 1fr;gap:64px;align-items:center}
.checks{margin-top:26px;display:grid;gap:12px}
.checks li{padding-left:32px;position:relative}
.checks li::before{content:"";position:absolute;left:0;top:3px;width:20px;height:20px;border-radius:6px;background:rgba(45,212,191,.14)}
.checks li::after{content:"";position:absolute;left:7px;top:7px;width:5px;height:9px;border:solid var(--accent);border-width:0 2px 2px 0;transform:rotate(45deg)}
.stack{display:flex;flex-wrap:wrap;gap:10px;padding:32px;border-radius:var(--radius);border:1px solid var(--line);
  background:radial-gradient(circle at 80% 0%,rgba(56,189,248,.1),transparent 60%),var(--panel)}
.stack span{font:500 .87rem var(--mono);padding:8px 14px;border-radius:8px;border:1px solid var(--line);background:var(--bg);color:var(--text);transition:border-color .2s,color .2s}
.stack span:hover{border-color:var(--accent);color:var(--accent)}

/* Contact */
.contact-box{display:grid;grid-template-columns:1.2fr 1fr;gap:48px;align-items:center;padding:56px;border-radius:20px;
  border:1px solid rgba(45,212,191,.3);background:linear-gradient(135deg,rgba(45,212,191,.09),rgba(56,189,248,.05) 50%,var(--panel))}
.contact-box > div > p:not(.kicker){color:var(--muted)}
.person{display:grid;grid-template-columns:auto 1fr;gap:16px 18px;align-items:center;padding:28px;border-radius:var(--radius);background:var(--bg);border:1px solid var(--line)}
.avatar{width:58px;height:58px;border-radius:50%;display:grid;place-items:center;font-weight:700;color:#04201c;background:linear-gradient(135deg,var(--accent),var(--accent2))}
.name{font-weight:650;font-size:1.08rem}
.role{color:var(--muted);font-size:.9rem}
.person .btn{grid-column:1/-1;justify-content:center}

/* Mentions légales : masquées, affichées quand on suit le lien du pied de page */
.legal{display:none;padding:0 0 80px}
.legal:target{display:block}
.legal-box{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);padding:36px}
.legal-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:24px}
.legal-head h2{font-size:1.5rem;margin:0}
.legal-close{font-size:1.6rem;line-height:1;color:var(--muted);padding:2px 10px;border-radius:8px;border:1px solid var(--line)}
.legal-close:hover{color:var(--accent);border-color:var(--accent)}
.legal-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.legal h3{font-size:.95rem;margin:0 0 8px;color:var(--text)}
.legal p{color:var(--muted);font-size:.9rem;margin-bottom:18px}
.legal p a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}

/* Footer */
.foot-links{display:flex;gap:22px}
.footer{border-top:1px solid var(--line);padding:28px 0;color:var(--muted);font-size:.88rem}
.foot-inner{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.foot-inner a:hover{color:var(--accent)}

/* Reveal */
.js .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.js .reveal.in{opacity:1;transform:none}

/* Responsive */
@media (max-width:980px){
  .cards{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .split,.contact-box{grid-template-columns:1fr;gap:36px}
}
@media (max-width:720px){
  .wrap{padding:0 16px}
  .burger{display:block}
  .menu{position:fixed;top:68px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;padding:8px 16px 20px;
    background:rgba(10,15,28,.97);border-bottom:1px solid var(--line);transform:translateY(-8px);opacity:0;pointer-events:none;transition:.2s}
  .menu.open{transform:none;opacity:1;pointer-events:auto}
  .menu a{padding:14px 4px;border-bottom:1px solid var(--line)}
  .menu .btn{margin-top:14px;justify-content:center;border:0}
  .nav.open{background:rgba(10,15,28,.97)}
  .cards,.steps{grid-template-columns:1fr}
  .section{padding:80px 0}
  .contact-box{padding:28px 20px}
  .legal-box{padding:24px 18px}
  .legal-grid{grid-template-columns:1fr;gap:8px}
  .person{padding:20px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{animation:none!important;transition:none!important}
  .js .reveal{opacity:1;transform:none}
}