:root{
  --bg:#FAFAFB; --panel:#FFFFFF; --line:#E4E4E7; --line2:#D4D4D8;
  --text:#18181B; --muted:#52525B; --muted2:#6E6E78;
  --purple:#7B5BFE; --purple-h:#8E70FF; --purple-a:#6240E6; --blue:#04B0FE;
  --ff:'Segoe UI',system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--ff);-webkit-font-smoothing:antialiased;line-height:1.6}
a{color:var(--purple-a);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:820px;margin:0 auto;padding:0 22px}

/* topbar */
.top{position:sticky;top:0;z-index:10;background:rgba(250,250,251,.85);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:14px;padding:12px 22px;max-width:1080px}
.brand{display:flex;align-items:center;gap:11px;color:var(--text)}
.brand svg{width:34px;height:34px}
.brand .nm{font-size:19px;letter-spacing:.13em;font-weight:700}
.brand .nm b{color:var(--purple)}
.top nav{margin-left:auto;display:flex;gap:8px;align-items:center}
.top nav a{color:var(--muted);font-weight:600;font-size:13px;padding:8px 14px;border-radius:999px}
.top nav a[aria-current="page"]{color:var(--purple);background:rgba(123,91,254,.08)}
.top nav a:hover{color:var(--purple);text-decoration:none;background:rgba(123,91,254,.08)}
.top nav a.cta{background:linear-gradient(120deg,var(--purple-a),var(--purple-h));color:#fff}

/* hero */
.hero{padding:48px 0 26px;border-bottom:1px solid var(--line)}
.hero .wrap{max-width:1080px}
.hero .kicker{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--purple);font-weight:700}
.hero h1{font-size:34px;line-height:1.2;margin:10px 0 8px}
.hero p{font-size:16px;color:var(--muted);max-width:640px;margin:0}

/* liste articles */
.grid{max-width:1080px;margin:0 auto;padding:34px 22px 60px;display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}
.card{display:block;border:1px solid var(--line);background:var(--panel);border-radius:16px;overflow:hidden;transition:.18s;box-shadow:0 1px 3px rgba(24,24,27,.05)}
.card:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(24,24,27,.1);text-decoration:none;border-color:var(--line2)}
.card .thumb{height:150px;background:linear-gradient(135deg,var(--purple),var(--blue))}
.card .body{padding:18px 20px 22px}
.card .tagline{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--purple);font-weight:700}
.card h2{font-size:19px;margin:8px 0 8px;color:var(--text);line-height:1.3}
.card p{font-size:14px;color:var(--muted);margin:0}
.card .meta{margin-top:14px;font-size:12px;color:var(--muted2)}

/* article */
article.post{padding:34px 0 70px}
.crumb.wide{max-width:1080px}
.crumb{max-width:820px;margin:0 auto;padding:20px 22px 0;font-size:12.5px;color:var(--muted2)}
.crumb a{color:var(--muted)}
.post h1{font-size:34px;line-height:1.22;margin:14px 0 10px}
.post .lede{font-size:18px;color:var(--muted);margin:0 0 10px}
.post .byline{font-size:13px;color:var(--muted2);margin:0 0 26px;padding-bottom:22px;border-bottom:1px solid var(--line)}
.post h2{font-size:24px;margin:34px 0 12px;line-height:1.3}
.post h3{font-size:18px;margin:24px 0 8px}
.post p{font-size:16.5px;margin:0 0 16px;text-align:justify;-webkit-hyphens:auto;hyphens:auto}
.post ul,.post ol{font-size:16.5px;margin:0 0 16px;padding-left:22px}
.post li{margin:6px 0}
.post table{width:100%;border-collapse:collapse;font-size:15px;margin:8px 0 22px}
.post th,.post td{border:1px solid var(--line);padding:9px 12px;text-align:left}
.post th{background:#F4F4F5;font-weight:600}
.post blockquote{margin:0 0 20px;padding:14px 18px;border-left:3px solid var(--purple);background:rgba(123,91,254,.06);border-radius:0 10px 10px 0;color:#3f3f46}
.answer{border:1px solid var(--line);background:var(--panel);border-radius:14px;padding:16px 20px;margin:0 0 26px;box-shadow:0 1px 3px rgba(24,24,27,.05)}
.answer strong{color:var(--purple-a)}
.faq{margin:34px 0}
.faq details{border:1px solid var(--line);border-radius:12px;padding:2px 16px;margin:0 0 10px;background:var(--panel)}
.faq summary{cursor:pointer;font-weight:600;padding:14px 0;font-size:16px;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:'+';color:var(--purple);font-weight:800;margin-right:10px}
.faq details[open] summary::before{content:'\2212'}
.faq details p{padding:0 0 14px;color:var(--muted);font-size:15.5px}
.cta-band{max-width:820px;margin:40px auto 0;padding:26px 28px;border-radius:18px;background:linear-gradient(120deg,rgba(123,91,254,.1),rgba(4,176,254,.1));border:1px solid var(--line)}
.cta-band h3{margin:0 0 6px;font-size:20px}
.cta-band p{margin:0 0 16px;color:var(--muted);font-size:15px}
.cta-band a{display:inline-block;background:linear-gradient(120deg,var(--purple-a),var(--purple-h));color:#fff;padding:12px 22px;border-radius:12px;font-weight:700}
.cta-band a:hover{text-decoration:none;filter:brightness(1.05)}

footer{border-top:1px solid var(--line);color:var(--muted2);font-size:13px}
footer .wrap{max-width:1080px;padding:26px 22px;display:flex;gap:16px;flex-wrap:wrap;justify-content:space-between}
footer a{color:var(--muted)}
@media (max-width:640px){
  .hero h1,.post h1{font-size:27px} .post p,.post ul,.post ol{font-size:16px}
  .top .wrap{flex-wrap:wrap;gap:6px;padding:10px 12px}
  .brand svg{width:28px;height:28px}
  .brand .nm{font-size:16px;letter-spacing:.1em}
  .top nav{gap:2px}
  .top nav a{font-size:12px;padding:7px 9px}
}

.prodshot{margin:0 0 26px;border-radius:14px;overflow:hidden;background:#0b0b12;border:1px solid #e6e6ea}
.prodshot img{display:block;width:100%;height:auto;max-height:460px;object-fit:contain}

.diagram{margin:26px 0;text-align:center}
.diagram img{max-width:100%;height:auto;border:1px solid #e6e6ea;border-radius:14px}
.diagram figcaption{margin-top:8px;font-size:13px;color:#6b7280}