:root{
  --ink:#e6edf6; --muted:#93a1b5; --line:#222b38;
  --bg:#0b0f16; --soft:#121823; --panel:#161d2a; --accent:#e23b2e; --accent-ink:#ff6155;
  --radius:14px; --max:1080px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased;
}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
a{color:inherit}

/* header */
header{position:sticky;top:0;z-index:50;background:rgba(11,15,22,.85);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-weight:700;letter-spacing:.12em;font-size:1.05rem;text-decoration:none}
.brand .dot{color:var(--accent)}
.nav-right{display:flex;align-items:center;gap:18px}
.nav-links{display:flex;gap:22px}
.nav-links a{color:var(--muted);text-decoration:none;font-size:.92rem}
.nav-links a:hover,.nav-links a.active{color:var(--ink)}
.lang{display:flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;font-size:.8rem}
.lang button{background:none;border:0;padding:.35rem .7rem;cursor:pointer;color:var(--muted);font-weight:600}
.lang button.on{background:var(--ink);color:#0b0f16}
.btn{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;padding:.7rem 1.2rem;border-radius:999px;font-weight:600;font-size:.92rem;border:0;cursor:pointer;transition:.2s}
.btn:hover{background:var(--accent-ink)}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{border-color:var(--ink)}
@media(max-width:780px){.nav-links{display:none}}

/* hero */
.hero{padding:84px 0 64px;background:radial-gradient(1100px 420px at 72% -10%,rgba(226,59,46,.14) 0,transparent 62%)}
.hero.inner{padding:64px 0 30px}
.flag{display:inline-flex;align-items:center;gap:.5rem;background:var(--panel);border:1px solid var(--line);color:var(--accent-ink);font-weight:600;font-size:.8rem;padding:.35rem .8rem;border-radius:999px;margin-bottom:22px}
.hero h1{font-size:clamp(2.1rem,5vw,3.4rem);line-height:1.1;letter-spacing:-.02em;max-width:20ch}
.hero p.sub{font-size:1.2rem;color:var(--muted);max-width:62ch;margin-top:20px}
.cta-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}
.reassure{margin-top:18px;font-size:.86rem;color:var(--muted)}

/* sections */
section{padding:64px 0;border-top:1px solid var(--line)}
section.flush{border-top:0}
.eyebrow{text-transform:uppercase;letter-spacing:.16em;font-size:.78rem;color:var(--accent-ink);font-weight:700;margin-bottom:12px}
h2{font-size:clamp(1.6rem,3.4vw,2.2rem);letter-spacing:-.01em;max-width:26ch}
.center h2,.center .eyebrow,.center .lead{margin-left:auto;margin-right:auto;text-align:center}
.lead{color:var(--muted);font-size:1.08rem;max-width:62ch;margin-top:14px}

.grid{display:grid;gap:20px;margin-top:36px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
@media(max-width:860px){.g3{grid-template-columns:1fr}.g2{grid-template-columns:1fr}}
.card{background:var(--soft);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.card h3{font-size:1.12rem;margin-bottom:8px}
.card p{color:var(--muted);font-size:.97rem}
.card .ico{font-size:1.5rem;margin-bottom:10px;display:block}
.card .sample{margin-top:14px;border-left:3px solid var(--accent);padding:6px 0 6px 12px;color:var(--ink);font-size:.92rem;font-style:italic}
.num{width:30px;height:30px;border-radius:8px;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem;margin-bottom:14px}

/* sovereignty band */
.band{background:linear-gradient(160deg,#15202f,#10161f);color:#fff;border:1px solid #243246;border-radius:18px;padding:44px;display:grid;grid-template-columns:1.2fr 1fr;gap:34px;align-items:center}
.band h2{color:#fff;max-width:22ch}
.band p{color:#aeb8c6;margin-top:14px}
.band ul{list-style:none;display:grid;gap:12px}
.band li{display:flex;gap:12px;align-items:flex-start;font-size:.98rem}
.band li b{color:#fff}
.check{color:#ff6a5e;font-weight:800;flex:none}
@media(max-width:860px){.band{grid-template-columns:1fr;padding:30px}}

/* pills */
.pills{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.pill{border:1px solid var(--line);border-radius:999px;padding:.5rem 1rem;font-size:.92rem;color:var(--ink);background:var(--panel)}

/* model-agnostic */
.swap{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:32px}
@media(max-width:860px){.swap{grid-template-columns:1fr}}

/* process / proof */
.steps3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:34px}
@media(max-width:860px){.steps3{grid-template-columns:1fr}}
.step{padding:20px;border-left:3px solid var(--accent);background:var(--soft);border-radius:0 12px 12px 0}
.step .k{font-size:.76rem;text-transform:uppercase;letter-spacing:.13em;color:var(--accent-ink);font-weight:700;margin-bottom:8px}
.step h4{font-size:1.04rem;margin-bottom:6px}
.step p{color:var(--muted);font-size:.95rem}
.proof{background:linear-gradient(160deg,#15202f,#10161f);border:1px solid #243246;border-radius:18px;padding:34px 38px;margin-top:30px}
.proof .tag{display:inline-block;color:var(--accent-ink);font-weight:700;font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;margin-bottom:12px}
.proof h3{font-size:1.3rem;color:#fff;margin-bottom:12px;max-width:34ch}
.proof p{color:#aeb8c6}
.proof p+p{margin-top:12px}

/* live chat demo */
.demo-wrap{max-width:720px;margin:34px auto 0}
.chat{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:18px;height:460px;display:flex;flex-direction:column;overflow:hidden}
@media(max-width:560px){.chat{height:72vh}}
.chat-head{display:flex;align-items:center;gap:10px;padding:4px 4px 12px;border-bottom:1px solid var(--line);flex:none}
.chat-body{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:12px;padding:14px 6px 2px 0;scroll-behavior:smooth}
.chat-dot{width:9px;height:9px;border-radius:50%;background:#3fd07f;box-shadow:0 0 8px #3fd07f;flex:none}
.chat-title{font-size:.84rem;color:var(--muted);font-weight:600}
.msg{max-width:82%;padding:.7rem .95rem;border-radius:14px;font-size:.96rem;line-height:1.5;opacity:0;transform:translateY(6px);animation:rise .3s ease forwards;white-space:pre-wrap}
@keyframes rise{to{opacity:1;transform:none}}
.msg.user{align-self:flex-end;background:var(--accent);color:#fff;border-bottom-right-radius:4px}
.msg.ai{align-self:flex-start;background:#0d131c;border:1px solid var(--line);color:var(--ink);border-bottom-left-radius:4px}
.msg.teach{border-color:var(--accent-ink);box-shadow:0 0 0 1px rgba(255,97,85,.22)}
.caret{display:inline-block;width:2px;height:1.05em;background:currentColor;margin-left:1px;vertical-align:-2px;animation:cb .8s steps(1) infinite}
@keyframes cb{50%{opacity:0}}
.learned{align-self:flex-start;font-size:.8rem;color:#3fd07f;font-weight:700;display:flex;align-items:center;gap:6px;opacity:0;animation:rise .3s ease forwards}
.typing{align-self:flex-start;display:flex;gap:4px;padding:.85rem 1rem;background:#0d131c;border:1px solid var(--line);border-radius:14px}
.typing span{width:7px;height:7px;border-radius:50%;background:var(--muted);animation:blink 1.2s infinite}
.typing span:nth-child(2){animation-delay:.2s}.typing span:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,60%,100%{opacity:.25}30%{opacity:1}}
.demo-cap{text-align:center;color:var(--muted);font-size:.84rem;margin-top:14px}
.replay{background:none;border:1px solid var(--line);color:var(--muted);border-radius:999px;padding:.45rem .95rem;font:inherit;font-size:.82rem;cursor:pointer;margin:16px auto 0;display:block}
.replay:hover{color:var(--ink);border-color:var(--ink)}

/* form */
.form-card{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:34px;max-width:620px;margin:30px auto 0}
.form-card label{display:block;font-size:.85rem;font-weight:600;margin:16px 0 6px}
.form-card input,.form-card textarea{width:100%;border:1px solid var(--line);border-radius:10px;padding:.8rem 1rem;font:inherit;color:var(--ink);background:#0d131c}
.form-card input::placeholder,.form-card textarea::placeholder{color:#5e6b7d}
.form-card input:focus,.form-card textarea:focus{outline:none;border-color:var(--accent-ink)}
.form-card textarea{min-height:110px;resize:vertical}
.form-card .btn{width:100%;margin-top:22px;padding:.9rem}
.formnote{font-size:.82rem;color:var(--muted);margin-top:14px;text-align:center}
.ok{display:none;text-align:center;color:#3fd07f;font-weight:600;margin-top:18px}

/* cta strip */
.ctas{text-align:center;background:var(--soft)}
.ctas .cta-row{justify-content:center}

footer{border-top:1px solid var(--line);padding:30px 0;color:var(--muted);font-size:.86rem;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
footer a{color:var(--muted);text-decoration:none}
footer a:hover{color:var(--ink)}

[data-fr]{display:none}
html[lang="fr"] [data-en]{display:none}
html[lang="fr"] [data-fr]{display:initial}