:root{
  --navy:#16305e;
  --navy-dark:#0f2246;
  --blue:#1f4b9e;
  --gold:#c99b2f;
  --ink:#1c2333;
  --body:#465062;
  --muted:#6d7688;
  --bg:#ffffff;
  --bg-soft:#f5f7fa;
  --line:#e3e7ee;
  --font:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--bg);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
header{
  position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center}
.brand-logo{height:46px;width:auto}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-links a{font-size:14.5px;font-weight:500;color:var(--body);transition:color .2s}
.nav-links a:hover{color:var(--navy)}
.nav-links a.btn{color:#fff}
.nav-links a.btn:hover{color:#fff;background:var(--navy-dark)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--navy);color:#fff;font-weight:600;font-size:14.5px;
  padding:12px 22px;border-radius:6px;border:1px solid var(--navy);
  cursor:pointer;transition:background .2s,border-color .2s;font-family:var(--font);
}
.btn:hover{background:var(--navy-dark);border-color:var(--navy-dark)}
.btn.outline{background:transparent;color:var(--navy)}
.btn.outline:hover{background:var(--bg-soft)}
.burger{display:none;background:none;border:none;cursor:pointer;padding:8px}
.burger span{display:block;width:22px;height:2px;background:var(--navy);margin:5px 0;transition:.25s}

.overline{font-size:12.5px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--gold);margin-bottom:12px}

/* ---------- en-tête de blog ---------- */
.blog-head{background:var(--bg-soft);border-bottom:1px solid var(--line);padding:72px 0}
.blog-head h1{font-size:clamp(30px,3.6vw,44px);font-weight:800;letter-spacing:-.02em;line-height:1.15;max-width:20ch}
.blog-head p{font-size:17px;color:var(--body);margin-top:16px;max-width:60ch}

/* ---------- liste d'articles ---------- */
.liste{padding:72px 0 96px;display:grid;gap:24px;grid-template-columns:repeat(2,1fr)}
.carte{
  border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff;
  display:flex;flex-direction:column;transition:box-shadow .25s,transform .25s,border-color .25s;
}
.carte:hover{box-shadow:0 16px 40px rgba(22,48,94,.10);transform:translateY(-3px);border-color:#c9d3e4}
.carte img{aspect-ratio:16/9;object-fit:cover;width:100%}
.carte .corps{padding:26px 28px 30px;display:flex;flex-direction:column;flex:1}
.carte .meta{font-size:12.5px;color:var(--muted);font-weight:500;margin-bottom:10px}
.carte h2{font-size:20px;font-weight:700;line-height:1.3;margin-bottom:10px}
.carte p{font-size:14.8px;color:var(--body);flex:1}
.carte .lien{margin-top:18px;font-size:14.5px;font-weight:600;color:var(--navy)}
.carte:hover .lien{text-decoration:underline}
.vide{
  grid-column:1/-1;border:1px dashed var(--line);border-radius:12px;
  padding:44px;text-align:center;color:var(--muted);font-size:15px;
}

/* ---------- article ---------- */
.art-head{background:var(--bg-soft);border-bottom:1px solid var(--line);padding:64px 0 56px}
.art-head .fil{font-size:13.5px;color:var(--muted);margin-bottom:20px}
.art-head .fil a:hover{color:var(--navy);text-decoration:underline}
.art-head h1{font-size:clamp(29px,3.6vw,44px);font-weight:800;letter-spacing:-.02em;line-height:1.18;max-width:22ch}
.art-meta{display:flex;flex-wrap:wrap;gap:8px 18px;align-items:center;margin-top:24px;font-size:14px;color:var(--muted)}
.art-meta .sep{color:var(--line)}
.art-meta b{color:var(--ink);font-weight:600}

.art-illus{max-width:820px;margin:-28px auto 0;padding:0 24px}
.art-illus img{border-radius:12px;box-shadow:0 20px 50px rgba(22,48,94,.14)}

article.corps{max-width:720px;margin:0 auto;padding:56px 24px 40px}
article.corps p{font-size:17.5px;line-height:1.75;color:#2f3746;margin-bottom:22px}
article.corps h2{
  font-size:25px;font-weight:800;color:var(--ink);letter-spacing:-.01em;
  margin:44px 0 16px;line-height:1.25;
}
article.corps .chapeau{font-size:19.5px;line-height:1.7;color:var(--ink);font-weight:500;margin-bottom:28px}
article.corps .accroche{
  font-size:21px;font-weight:700;color:var(--navy);line-height:1.45;
  border-left:3px solid var(--gold);padding:4px 0 4px 24px;margin:36px 0;
}
article.corps .chiffres{
  background:var(--bg-soft);border:1px solid var(--line);border-radius:12px;
  padding:26px 28px;margin:32px 0;
}
article.corps .chiffres p{margin:0;font-size:16.5px;color:var(--body)}
article.corps .chiffres b{display:block;font-size:30px;font-weight:800;color:var(--navy);line-height:1.2;margin-bottom:6px}
article.corps .source{font-size:13.5px;color:var(--muted);font-style:italic}
article.corps strong{font-weight:700;color:var(--ink)}

/* ---------- CTA fin d'article ---------- */
.art-cta{background:var(--navy);color:#fff;margin-top:24px}
.art-cta .inner{
  max-width:820px;margin:0 auto;padding:56px 24px;
  display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between;
}
.art-cta h3{font-size:24px;font-weight:800;line-height:1.3;max-width:22ch}
.art-cta p{color:#c4cddf;font-size:15.5px;margin-top:8px;max-width:44ch}
.art-cta .btn{background:#fff;color:var(--navy);border-color:#fff}
.art-cta .btn:hover{background:#eef1f6;border-color:#eef1f6}

/* ---------- footer ---------- */
footer{background:var(--navy-dark);color:#aeb9cf}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding:64px 0 48px}
.foot-brand p{font-size:14px;margin-top:16px;max-width:32ch}
.foot-brand .slogan{margin-top:8px;max-width:none;white-space:nowrap;font-weight:600;color:#fff}
.foot-col h4{font-size:12.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:#fff;margin-bottom:16px}
.foot-col a,.foot-col span{display:block;font-size:14px;padding:4px 0;color:#aeb9cf}
.foot-col a:hover{color:#fff}
.foot-legal{
  border-top:1px solid rgba(255,255,255,.12);padding:22px 0;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#7d8aa3;
}

/* ---------- WhatsApp ---------- */
.wa-float{
  position:fixed;right:20px;bottom:20px;z-index:200;
  width:56px;height:56px;border-radius:50%;background:#25D366;color:#fff;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 24px rgba(37,211,102,.4);transition:transform .2s,background .2s;
}
.wa-float:hover{background:#1da851;transform:scale(1.06)}

/* ---------- responsive ---------- */
@media(max-width:960px){
  .nav-links{
    position:fixed;top:72px;left:0;right:0;background:#fff;flex-direction:column;
    gap:0;border-bottom:1px solid var(--line);display:none;padding:12px 0;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:13px 24px;width:100%;font-size:16px}
  .nav-links .btn{margin:12px 24px;width:calc(100% - 48px)}
  .burger{display:block}
  .liste{grid-template-columns:1fr;padding:56px 0 72px}
  .blog-head{padding:56px 0}
  .art-head{padding:48px 0 44px}
  article.corps{padding:44px 24px 32px}
  article.corps p{font-size:17px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:560px){.foot-grid{grid-template-columns:1fr}}