/* site/css/clairvia.css — source unique des tokens + styles header/nav/footer
 * Chantier uniformisation header/logo/nav (cf. README blog "Header/footer placeholder à remplacer").
 * Ne contient QUE ce qui est commun à toutes les pages du périmètre marketing :
 * tokens de base, header, brand/logo, nav, dropdown Produit, lang-switch, footer.
 * Le CSS spécifique à chaque page (hero, sections, grilles...) reste local à la page.
 */

:root{
  --bg:#020617;
  --bg-soft:#081225;
  --panel:#0f172a;
  --panel-2:#101b31;
  --panel-hover:#17233b;
  --text:#ffffff;
  --muted:#cbd5f5;
  --muted-2:#94a3b8;
  --line:rgba(255,255,255,0.06);
  --blue:#2563eb;
  --blue-2:#38bdf8;
  --blue-3:#60a5fa;
  --green:#22c55e;
  --red:#f87171;
  --max:1240px;
  /* Accent d'interface par verticale (décision Cédric étape 3) : le logo ne
     varie jamais, mais le CTA nav + l'état actif de nav suivent --accent.
     Bleu par défaut ; body.accent-amber (achats/, btp/) le remplace. */
  --accent:var(--blue);
  --accent-hover:#1d4ed8;
  --accent-shadow:37,99,235;
}
body.accent-amber{
  --accent:#f59e0b;
  --accent-hover:#d97706;
  --accent-shadow:245,158,11;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{margin:0;font-family:'Inter',sans-serif;background:var(--bg);color:var(--text);overflow-x:hidden;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,textarea{font-family:inherit;}
.container{width:min(var(--max), calc(100% - 48px));margin:0 auto;}

/* ===== HEADER / BRAND ===== */
.header{position:sticky;top:0;z-index:100;backdrop-filter:blur(14px);background:rgba(2,6,23,0.82);border-bottom:1px solid var(--line);}
.header-inner{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px;}
.brand{display:flex;align-items:center;gap:0;flex-shrink:0;}
.brand img{width:250px;height:auto;display:block;}

/* ===== NAV ===== */
.nav{display:flex;align-items:center;gap:24px;}
.nav-links{display:flex;align-items:center;gap:26px;}
.nav-links a{font-size:18px;line-height:1;font-weight:600;color:#dbe7ff;opacity:.92;transition:opacity .2s ease, color .2s ease, transform .2s ease;}
.nav-links a:hover{opacity:1;color:#fff;transform:translateY(-1px);}
.nav-links a[aria-current="page"]{opacity:1;color:var(--accent);}
.dropdown-item[aria-current="page"]{background:rgba(255,255,255,0.06);}
.dropdown-item[aria-current="page"] .dropdown-item-name{color:var(--accent);}
.nav-cta{display:inline-flex;align-items:center;justify-content:center;height:46px;padding:0 20px;border-radius:14px;background:var(--accent);color:#fff;font-size:16px;font-weight:800;box-shadow:0 10px 28px rgba(var(--accent-shadow),.25);transition:transform .2s ease, background .2s ease, box-shadow .2s ease;}
.nav-cta:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 14px 34px rgba(var(--accent-shadow),.32);}

/* ===== LANG SWITCH (un seul mécanisme, cf. étape 2 note) ===== */
.lang-switch{display:flex;align-items:center;gap:4px;padding:6px 10px;border:1px solid rgba(255,255,255,0.08);border-radius:999px;background:rgba(255,255,255,0.03);}
.lang-switch a,.lang-switch span{font-size:13px;font-weight:700;color:#d7e3ff;opacity:.55;cursor:pointer;padding:2px 4px;border-radius:4px;transition:all .2s;}
.lang-switch a:hover,.lang-switch span:hover{opacity:.8;}
.lang-switch a.active,.lang-switch span.active{opacity:1;color:#fff;background:rgba(255,255,255,0.1);}

/* ===== DROPDOWN NAV (Produit) ===== */
.nav-item{position:relative;padding-bottom:8px;margin-bottom:-8px;}
.nav-item > a{display:flex;align-items:center;gap:5px;}
.nav-item > a svg{width:12px;height:12px;opacity:.6;transition:transform .2s;}
.nav-item:hover > a svg{transform:rotate(180deg);opacity:1;}
.dropdown{position:absolute;top:100%;left:50%;min-width:220px;background:#0f172a;border:1px solid rgba(255,255,255,0.1);border-radius:14px;padding:8px;opacity:0;pointer-events:none;padding-top:20px;margin-top:0;transform:translateX(-50%) translateY(-4px);transition:opacity .2s ease, transform .2s ease;box-shadow:0 24px 48px rgba(0,0,0,.4);z-index:200;}
.nav-item:hover .dropdown{opacity:1;pointer-events:auto;transform:translateX(-50%) translateY(0);}
.dropdown::before{content:'';position:absolute;top:12px;left:50%;transform:translateX(-50%);border:6px solid transparent;border-bottom-color:rgba(255,255,255,0.1);}
.dropdown::after{content:'';position:absolute;top:13px;left:50%;transform:translateX(-50%);border:6px solid transparent;border-bottom-color:#0f172a;}
.dropdown-item{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;font-size:14px;font-weight:600;color:var(--muted);transition:all .15s;text-decoration:none;}
.dropdown-item:hover{background:rgba(255,255,255,0.06);color:#fff;}
.dropdown-item-icon{width:28px;height:28px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:14px;flex-shrink:0;}
.dropdown-item-text{line-height:1.2;}
.dropdown-item-name{font-size:14px;font-weight:700;color:#fff;}
.dropdown-item-desc{font-size:11px;color:var(--muted-2);margin-top:1px;}
.dropdown-divider{height:1px;background:rgba(255,255,255,0.06);margin:6px 4px;}
.dropdown-coming{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;opacity:.45;cursor:default;}
.dropdown-soon{font-size:10px;font-weight:700;padding:2px 6px;border-radius:999px;background:rgba(255,255,255,0.08);color:var(--muted-2);}

/* ===== FOOTER ===== */
.footer{padding:32px 0;background:#020617;border-top:1px solid var(--line);}
.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;font-size:14px;color:var(--muted-2);}
.footer-links{display:flex;flex-wrap:wrap;gap:8px 20px;}
.footer-links a{color:var(--muted-2);transition:color .2s;}
.footer-links a:hover{color:#fff;}
.footer-mention{margin-top:10px;font-size:12px;color:var(--muted-2);opacity:.7;width:100%;}

/* ===== RESPONSIVE — breakpoint unique 820px (décision Cédric étape 2) ===== */
@media (max-width: 820px){
  .container{width:min(var(--max), calc(100% - 28px));}
  .header-inner{flex-wrap:wrap;justify-content:center;padding:14px 0;gap:16px;}
  .brand{width:100%;justify-content:center;}
  .brand img{width:210px;}
  .nav{width:100%;justify-content:center;flex-wrap:wrap;gap:12px;}
  .nav-links{gap:16px;flex-wrap:wrap;justify-content:center;}
}