/* =========================================================
   POLYANCE — Header : barre flottante en pilule
   ========================================================= */

.site-header{
  position:fixed; top:20px; left:0; right:0; z-index:500;
  display:flex; justify-content:center;
  padding:0 20px;
  transition:top var(--dur-m) var(--ease);
}

.header-bar{
  width:100%; max-width:1180px;
  display:flex; align-items:center; justify-content:space-between; gap:24px;
  padding:10px 12px 10px 26px;
  border-radius:var(--radius-pill);
  background:rgba(255,255,255,.7);
  backdrop-filter:blur(18px) saturate(180%);
  -webkit-backdrop-filter:blur(18px) saturate(180%);
  border:1px solid rgba(16,24,43,.06);
  box-shadow:0 1px 1px rgba(16,24,43,.02);
  transition:background var(--dur-m) var(--ease), box-shadow var(--dur-m) var(--ease), border-color var(--dur-m) var(--ease);
}
.site-header.is-scrolled .header-bar{
  background:rgba(255,255,255,.92);
  border-color:rgba(16,24,43,.08);
  box-shadow:var(--shadow-m);
}

.brand-logo{ display:flex; align-items:center; flex:none; }
.brand-logo img{ height:30px; width:auto; display:block; }

.main-nav{ display:flex; align-items:center; }
.main-nav ul{ display:flex; gap:8px; }
.main-nav a{
  font-family:var(--font-body); font-weight:600; font-size:14.5px; color:var(--ink-soft);
  position:relative; padding:9px 16px; border-radius:var(--radius-pill);
  transition:color var(--dur-s) var(--ease), background var(--dur-s) var(--ease);
}
.main-nav a:hover{ color:var(--navy); background:var(--grey-tint); }
.main-nav a[aria-current="page"]{ color:var(--blue); background:var(--blue-tint); }

.nav-cta{ display:flex; align-items:center; gap:10px; flex:none; }
.nav-cta .btn-primary{ padding:12px 22px; font-size:14.5px; }

.nav-toggle{
  display:none; flex-direction:column; justify-content:center; gap:5px;
  width:42px; height:42px; border:none; background:var(--grey-tint); border-radius:50%;
  cursor:pointer; flex:none;
}
.nav-toggle span{ width:18px; height:2px; background:var(--navy); border-radius:2px; transition:transform var(--dur-s) var(--ease), opacity var(--dur-s) var(--ease); margin-inline:auto; }
.nav-toggle[aria-expanded="true"] span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2){ opacity:0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

.mobile-nav{
  position:fixed; inset:0; z-index:490;
  background:var(--white);
  display:flex; flex-direction:column; justify-content:center; align-items:flex-start;
  gap:28px; padding:88px 32px 32px;
  overflow-y:auto;
  transform:translateY(-100%);
  transition:transform .45s var(--ease-soft);
}
.mobile-nav.is-open{ transform:translateY(0); }
.mobile-nav ul{ display:flex; flex-direction:column; gap:22px; width:100%; }
.mobile-nav a{ font-family:var(--font-display); font-size:32px; font-weight:400; color:var(--navy); }
.mobile-nav a[aria-current="page"]{ color:var(--blue); }
.mobile-nav .btn{
  margin-top:12px;
  white-space:normal;
  text-align:center;
  justify-content:center;
  width:100%;
  max-width:340px;
}

@media (max-width:900px){
  .main-nav ul{ display:none; }
  .nav-cta .btn-primary{ display:none; }
  .nav-toggle{ display:flex; }
  .site-header{ top:14px; padding:0 16px; }
  .header-bar{ padding:8px 8px 8px 18px; }
  .brand-logo img{ height:25px; }
}
@media (min-width:901px){
  .mobile-nav{ display:none; }
}