/* =========================================================
   VIVISEO — styles du blog (partagés index + articles)
   ========================================================= */
:root{
  --primary:#5b46e0;
  --primary-2:#6a4ff0;
  --primary-light:#efecfd;
  --lav:#f1eefc;
  --pink:#ff5a8a;
  --ink:#1c1830;
  --ink-soft:#4a4660;
  --muted:#8a87a0;
  --dark:#0f0c1d;
  --on-dark-soft:#c9c4e4;
  --line:#e8e6f2;
  --line-dark:rgba(255,255,255,.09);
  --radius:16px;
  --shadow:0 20px 44px -20px rgba(40,28,120,.28);
  --glow:0 18px 44px -12px rgba(106,79,240,.55);
  --maxw:1120px;
  --header-h:76px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
html,body{overflow-x:clip}
body{
  font-family:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  color:var(--ink);background:#fff;line-height:1.7;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
h1,h2,h3{font-family:'Poppins',sans-serif;line-height:1.22;letter-spacing:-.02em;color:var(--ink)}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- Boutons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  font-family:'Poppins',sans-serif;font-weight:700;border-radius:14px;cursor:pointer;
  border:2px solid transparent;white-space:normal;text-align:center;
  transition:transform .16s ease,box-shadow .22s ease,background .22s ease,color .22s ease;
}
.btn:hover{transform:translateY(-3px)}
.btn:focus-visible{outline:3px solid #b9aefc;outline-offset:3px}
.btn-md{font-size:15px;padding:13px 26px}
.btn-xl{font-size:19px;padding:21px 44px;border-radius:16px}
.btn-primary{background:linear-gradient(135deg,var(--primary-2),var(--primary));color:#fff;box-shadow:var(--glow)}
.btn-primary:hover{box-shadow:0 24px 54px -12px rgba(106,79,240,.7)}
.btn-white{background:#fff;color:var(--primary);box-shadow:0 18px 40px -14px rgba(0,0,0,.45)}
.btn-white:hover{background:var(--primary-light)}

/* ---------- Logo / header (identiques au site) ---------- */
.brand{display:inline-flex;align-items:center;gap:11px}
.logo-mark{width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,var(--primary-2),var(--pink));
  display:inline-flex;align-items:center;justify-content:center;box-shadow:0 8px 20px -8px rgba(106,79,240,.85);flex:none}
.logo-mark svg{width:24px;height:24px}
.logo-word{font-family:'Poppins',sans-serif;font-weight:800;font-size:22px;letter-spacing:-.5px;line-height:1;color:#fff}
.logo-word .ac{color:var(--pink)}
.logo-sub{display:block;font-size:9px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:#8d88ad;margin-top:3px}

header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(15,12,29,.9);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line-dark);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:var(--header-h);gap:18px}
.nav-links{display:flex;gap:26px;font-size:14.5px;font-weight:500;color:#cfcbe6}
.nav-links a:hover{color:#fff}
.nav-links a.active{color:#fff;font-weight:600}
.nav-cta{display:flex;align-items:center;gap:14px}
.burger{display:none;flex-direction:column;justify-content:center;gap:5px;cursor:pointer;background:none;border:0;padding:10px;min-width:44px;min-height:44px}
.burger span{width:24px;height:2px;background:#fff;border-radius:2px}

/* ---------- Hero du blog / de l'article ---------- */
.blog-hero{
  color:#fff;padding:calc(var(--header-h) + 52px) 0 56px;
  background:
    radial-gradient(800px 420px at 85% -10%, rgba(106,79,240,.4), transparent 62%),
    radial-gradient(640px 360px at -5% 60%, rgba(255,90,138,.14), transparent 60%),
    linear-gradient(180deg,#131024, var(--dark));
}
.blog-hero h1{color:#fff;font-size:clamp(30px,3.6vw,42px);font-weight:800;max-width:820px}
.blog-hero .sub{color:var(--on-dark-soft);margin-top:14px;max-width:640px;font-size:17px}
.crumbs{font-size:13px;color:#a49ecb;margin-bottom:18px}
.crumbs a{color:#cfcbe6;text-decoration:underline;text-underline-offset:3px}
.crumbs a:hover{color:#fff}
.art-meta{display:flex;gap:18px;flex-wrap:wrap;margin-top:18px;color:#a49ecb;font-size:13.5px;align-items:center}
.cat-chip{display:inline-block;font-size:12px;font-weight:700;letter-spacing:1px;text-transform:uppercase;
  color:#ffd9e5;background:rgba(255,90,138,.14);border:1px solid rgba(255,90,138,.4);padding:5px 13px;border-radius:30px}

/* ---------- Listing (index du blog) ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;padding:64px 0 20px}
.post-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:0;overflow:hidden;
  display:flex;flex-direction:column;
  transition:transform .2s ease,box-shadow .22s ease,border-color .22s ease;
}
.post-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#d8d2f5}
.post-card .thumb{display:block}
.post-card .thumb img{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;display:block}
.post-card .pc-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:11px;flex:1}
.post-card .chip{display:inline-block;align-self:flex-start;font-size:11.5px;font-weight:700;letter-spacing:.8px;text-transform:uppercase;
  color:var(--primary);background:var(--primary-light);padding:5px 12px;border-radius:30px}
.post-card time{font-size:13px;color:var(--muted)}
.post-card h2{font-size:19px;line-height:1.3}
.post-card h2 a:hover{color:var(--primary)}
.post-card p{font-size:14px;color:var(--ink-soft);flex:1}
.post-card .more{font-family:'Poppins',sans-serif;font-weight:600;font-size:14px;color:var(--primary)}
.post-card .more:hover{color:var(--pink)}

/* ---------- Corps d'article ---------- */
.article-wrap{max-width:780px;margin:0 auto;padding:56px 24px 20px}
.article-wrap h2{font-size:26px;margin:44px 0 16px}
.article-wrap h3{font-size:19px;margin:28px 0 12px}
.article-wrap p{color:var(--ink-soft);margin-bottom:16px;font-size:16px}
.article-wrap ul,.article-wrap ol{margin:0 0 18px 24px;color:var(--ink-soft)}
.article-wrap li{margin-bottom:8px}
.article-wrap strong{color:var(--ink)}
.article-wrap a{color:var(--primary);text-decoration:underline;text-underline-offset:3px}
.article-wrap a:hover{color:var(--pink)}
.article-wrap blockquote{
  margin:22px 0;padding:16px 20px;border-left:4px solid var(--primary);
  background:var(--lav);border-radius:10px;color:var(--ink);font-weight:500;
}
.article-wrap table{width:100%;border-collapse:collapse;margin:22px 0;font-size:14.5px}
.article-wrap th,.article-wrap td{border:1px solid var(--line);padding:11px 14px;text-align:left;vertical-align:top;color:var(--ink-soft)}
.article-wrap th{background:var(--lav);color:var(--ink);font-family:'Poppins',sans-serif;font-weight:600;font-size:13.5px}
.article-wrap tr:nth-child(even) td{background:#faf9fe}
.table-scroll{overflow-x:auto}

.art-hero-img{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;border-radius:16px;box-shadow:var(--shadow);margin:0 0 28px}
.art-inline-img{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;border-radius:14px;box-shadow:var(--shadow);margin:28px 0}

.takeaways{
  background:var(--lav);border:1px solid #ddd5f6;border-radius:14px;padding:22px 24px;margin:0 0 10px;
}
.takeaways h2{font-size:17px;margin:0 0 12px;color:var(--ink)}
.takeaways ul{margin:0 0 0 20px}
.takeaways li{color:var(--ink);font-weight:500;font-size:15px;margin-bottom:7px}

/* FAQ */
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:14px;overflow:hidden;
  box-shadow:0 12px 28px -22px rgba(40,28,120,.45)}
.faq-item[open],.faq-item:hover{border-color:#cdc5f2}
.faq-item summary{cursor:pointer;list-style:none;padding:18px 22px;font-family:'Poppins',sans-serif;font-weight:600;font-size:15.5px;color:var(--ink);
  display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq-item summary:hover{color:var(--primary)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:25px;line-height:1;color:var(--primary);font-weight:400;flex:none;transition:transform .2s ease}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item .faq-a{padding:0 22px 20px;color:var(--ink-soft);font-size:15px}

/* Encadré auteur */
.author-box{
  display:flex;gap:18px;align-items:center;margin:40px 0 0;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;box-shadow:var(--shadow);
}
.author-box img{width:76px;height:76px;border-radius:50%;object-fit:cover;flex:none}
.author-box strong{font-family:'Poppins',sans-serif;font-size:16px;color:var(--ink);display:block}
.author-box span{font-size:13px;color:var(--primary);font-weight:600;display:block;margin-bottom:5px}
.author-box p{font-size:13.5px;color:var(--ink-soft);margin:0}

/* Bandeau CTA */
.cta-band{
  margin:56px 0 0;color:#fff;text-align:center;border-radius:0;
  background:
    radial-gradient(620px 320px at 15% 0%, rgba(255,90,138,.2), transparent 60%),
    radial-gradient(700px 400px at 90% 100%, rgba(106,79,240,.5), transparent 62%),
    linear-gradient(135deg,#231a4b,#120e26);
  padding:58px 24px;
}
.cta-band h2{color:#fff;font-size:clamp(23px,2.8vw,30px);max-width:720px;margin:0 auto 12px}
.cta-band p{color:#c9c4e4;max-width:560px;margin:0 auto 26px}

/* Articles liés */
.related{padding:56px 0 72px}
.related h2{text-align:center;font-size:24px;margin-bottom:28px}
.related .post-grid{padding:0;grid-template-columns:repeat(2,1fr);max-width:820px;margin:0 auto}

/* ---------- Footer compact ---------- */
footer{background:var(--dark);color:#cfccdf;padding:44px 0 28px;margin-top:64px}
footer.tight{margin-top:0}
.foot-grid{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;margin-bottom:30px;align-items:flex-start}
.foot-links{display:flex;gap:22px;flex-wrap:wrap;font-size:14px}
.foot-links a{color:#b6b2cf;padding:8px 0;display:inline-block}
.foot-links a:hover{color:#fff}
.foot-bottom{border-top:1px solid var(--line-dark);padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13px;color:#8b87a8}
.foot-bottom a{color:#a09cbe;text-decoration:underline;text-underline-offset:3px;display:inline-block;padding:10px 6px;margin:-10px 0}
.foot-bottom a:hover{color:#fff}

/* ---------- Responsive ---------- */
@media (max-width:960px){
  .post-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:900px){
  .nav-links{
    position:absolute;top:var(--header-h);left:0;right:0;background:#0d0a1a;
    flex-direction:column;gap:0;border-bottom:1px solid var(--line-dark);
    max-height:0;overflow:hidden;visibility:hidden;transition:max-height .3s ease,visibility .3s;
  }
  .nav-links.open{max-height:480px;visibility:visible}
  .nav-links a{padding:16px 24px;border-top:1px solid rgba(255,255,255,.07);color:#e7e4f5}
  .burger{display:flex}
  .nav-cta .btn{display:none}
}
@media (max-width:640px){
  .post-grid{grid-template-columns:1fr;padding-top:44px}
  .related .post-grid{grid-template-columns:1fr}
  .article-wrap{padding-top:40px}
  .btn-xl{font-size:16.5px;padding:18px 22px}
  .author-box{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .btn,.post-card,.faq-item summary::after{transition:none}
}