:root{
  --bg:#0A192F;
  --bg2:#112240;
  --accent:#00F5FF;
  --txt:#E6F1FF;
  --txt2:#8892B0;
  --txt3:#C5D3E8;
  --head:'Montserrat',sans-serif;
  --body:'Roboto',sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--txt);font-family:var(--body);font-weight:300;line-height:1.8;-webkit-font-smoothing:antialiased}
a{color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}

/* barre de navigation */
.barre{position:sticky;top:0;z-index:50;background:rgba(10,25,47,.94);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.07)}
.barre-in{max-width:1100px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.marque{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--txt)}
.marque img{height:30px;width:30px}
.marque span{font-family:var(--head);font-weight:800;font-size:.95rem;letter-spacing:.5px}
.marque span b{color:var(--accent);font-weight:800}
.barre nav{display:flex;gap:22px}
.barre nav a{font-size:.85rem;text-decoration:none;color:var(--txt2)}
.barre nav a:hover,.barre nav a.actif{color:var(--accent)}

/* page d'index du blog */
.tete{max-width:1100px;margin:0 auto;padding:76px 24px 44px}
.tete h1{font-family:var(--head);font-size:clamp(2rem,5vw,3rem);font-weight:800;letter-spacing:-.8px;line-height:1.1;margin-bottom:18px}
.tete p{font-size:1.12rem;color:var(--txt3);max-width:60ch}
.liste{max-width:1100px;margin:0 auto;padding:0 24px 90px;display:grid;gap:22px}
.une{display:grid;grid-template-columns:1.15fr 1fr;background:var(--bg2);border:1px solid rgba(255,255,255,.07);border-radius:12px;overflow:hidden;text-decoration:none;color:var(--txt);transition:border-color .25s}
.une:hover{border-color:rgba(0,245,255,.45)}
.une-visuel{position:relative;background:#0b1a33;min-height:300px}
.une-visuel iframe{position:absolute;inset:0;width:100%;height:100%;border:0;pointer-events:none;opacity:.92}
.une-visuel::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent 60%,var(--bg2))}
.une-texte{padding:38px 40px;display:flex;flex-direction:column;justify-content:center;gap:16px}
.une h2{font-family:var(--head);font-size:clamp(1.3rem,2.4vw,1.75rem);font-weight:700;line-height:1.25;letter-spacing:-.4px}
.une p{color:var(--txt3);font-size:1rem}
.lire{font-family:var(--head);font-weight:600;font-size:.88rem;color:var(--accent)}

/* en-tete d'article */
.entete{max-width:760px;margin:0 auto;padding:72px 24px 40px}
.secteur{display:inline-block;align-self:flex-start;font-family:var(--head);font-size:.78rem;font-weight:600;color:var(--accent);border:1px solid rgba(0,245,255,.35);border-radius:20px;padding:4px 13px;margin-bottom:26px}
.entete h1{font-family:var(--head);font-size:clamp(1.75rem,4.6vw,2.7rem);font-weight:700;line-height:1.2;letter-spacing:-.6px;margin-bottom:24px}
.chapo{font-size:1.18rem;line-height:1.7;color:var(--txt3);margin-bottom:28px}
.meta{font-size:.86rem;color:var(--txt2);display:flex;flex-wrap:wrap;gap:6px 0}
.meta span+span::before{content:",";margin-right:6px}
.meta b{color:var(--txt);font-weight:500}

/* demo integree */
.demo{max-width:1100px;margin:16px auto 0;padding:0 24px}
.demo-cadre{aspect-ratio:16/9;border:1px solid rgba(0,245,255,.25);border-radius:10px;overflow:hidden;background:var(--bg2);box-shadow:0 30px 60px rgba(0,0,0,.45)}
.demo-cadre iframe{width:100%;height:100%;border:0;display:block}
.demo figcaption{margin:14px 4px 0;font-size:.88rem;color:var(--txt2);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.demo figcaption a{text-decoration:none;color:var(--accent);white-space:nowrap}

/* corps de l'article */
.corps{max-width:720px;margin:0 auto;padding:56px 24px 20px}
.corps h2{font-family:var(--head);font-size:1.45rem;font-weight:700;letter-spacing:-.3px;line-height:1.3;margin:52px 0 18px}
.corps h2:first-child{margin-top:0}
.corps p{font-size:1.06rem;color:var(--txt3);margin-bottom:22px}
.corps p b{color:var(--txt);font-weight:500}

/* le calcul, presente comme une note d'hotel */
.folio{background:var(--bg2);border:1px solid rgba(255,255,255,.07);border-radius:8px;padding:26px 28px 22px;margin:34px 0 38px;font-variant-numeric:tabular-nums}
.folio-titre{font-family:var(--head);font-size:.82rem;font-weight:600;color:var(--txt2);margin-bottom:18px;padding-bottom:12px;border-bottom:1px dashed rgba(255,255,255,.14)}
.ligne{display:flex;align-items:baseline;gap:10px;padding:9px 0;font-size:.97rem;color:var(--txt3)}
.ligne .lib{flex:0 1 auto}
.ligne .pts{flex:1 1 20px;border-bottom:1px dotted rgba(255,255,255,.22);transform:translateY(-5px)}
.ligne .val{flex:0 0 auto;color:var(--txt);font-weight:400;white-space:nowrap}
.ligne.total{margin-top:10px;padding-top:16px;border-top:1px dashed rgba(255,255,255,.14);font-family:var(--head);font-weight:600;font-size:1rem}
.ligne.total .val{color:var(--accent);font-size:1.15rem}
.folio-note{margin:14px 0 0;font-size:.8rem;color:var(--txt2);line-height:1.6}

/* fin d'article */
.fin{max-width:720px;margin:36px auto 0;padding:0 24px}
.cta{background:linear-gradient(160deg,#112240,#0d1c38);border:1px solid rgba(0,245,255,.2);border-radius:10px;padding:34px 30px;display:flex;flex-wrap:wrap;gap:22px;align-items:center;justify-content:space-between}
.cta p{margin:0;font-size:1.02rem;color:var(--txt3);max-width:44ch}
.cta p b{color:var(--txt);font-weight:600;font-family:var(--head);display:block;font-size:1.15rem;margin-bottom:6px;letter-spacing:-.2px}
.btns{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:9px;text-decoration:none;font-family:var(--head);font-size:.85rem;font-weight:600;padding:13px 24px;border-radius:4px;transition:transform .2s,background .2s,border-color .2s;white-space:nowrap}
.plein{background:var(--accent);color:var(--bg)}
.plein:hover{background:#7dfdfd;transform:translateY(-2px)}
.vide{border:1px solid rgba(255,255,255,.25);color:var(--txt)}
.vide:hover{border-color:var(--accent);color:var(--accent)}
.auteur{display:flex;gap:16px;align-items:center;margin:44px 0 0;padding-top:28px;border-top:1px solid rgba(255,255,255,.08)}
.auteur .ini{width:48px;height:48px;border-radius:50%;background:var(--bg2);border:1px solid rgba(0,245,255,.35);display:flex;align-items:center;justify-content:center;font-family:var(--head);font-weight:700;color:var(--accent);flex:none}
.auteur p{margin:0;font-size:.9rem;color:var(--txt2);line-height:1.55}
.auteur p b{color:var(--txt);font-weight:500;display:block}
.suite{max-width:720px;margin:48px auto 0;padding:0 24px 80px;display:flex;gap:14px;flex-wrap:wrap}
.suite a{flex:1 1 260px;text-decoration:none;color:var(--txt);background:var(--bg2);border:1px solid rgba(255,255,255,.07);border-radius:8px;padding:18px 20px;transition:border-color .2s}
.suite a:hover{border-color:rgba(0,245,255,.4)}
.suite small{display:block;font-size:.76rem;color:var(--txt2);margin-bottom:5px}
.suite span{font-family:var(--head);font-weight:600;font-size:.95rem}

/* pied de page */
.pied{border-top:1px solid rgba(255,255,255,.07);padding:28px 24px;text-align:center;color:var(--txt2);font-size:.83rem}
.pied a{text-decoration:none;margin:0 10px;color:var(--txt3)}
.pied a:hover{color:var(--accent)}

@media(max-width:820px){
  .tete{padding:50px 20px 32px}
  .liste{padding:0 20px 70px}
  .une{grid-template-columns:1fr}
  .une-visuel{min-height:0;aspect-ratio:16/10}
  .une-visuel::after{background:linear-gradient(180deg,transparent 55%,var(--bg2))}
  .une-texte{padding:26px 24px 30px}
  .barre nav a:not(.actif){display:none}
}
@media(max-width:700px){
  .entete{padding:48px 20px 30px}
  .demo{padding:0 14px}
  .demo-cadre{aspect-ratio:4/3;border-radius:8px}
  .corps{padding:42px 20px 10px}
  .corps p{font-size:1.02rem}
  .folio{padding:20px 18px 16px}
  .ligne{font-size:.9rem}
  .cta{padding:26px 22px}
  .btn{flex:1;justify-content:center}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important}html{scroll-behavior:auto}}