.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--couleur-ivoire);
  border-bottom: 1px solid var(--couleur-lin);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}
.site-header__logo {
  font-family: var(--font-titre);
  font-size: var(--taille-xl);
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
}
.logo-eveil { color: var(--couleur-terre); }
.logo-asma  { color: var(--couleur-sauge); }

.nav-principale { display: flex; align-items: center; }
.nav-menu { display: flex; align-items: center; gap: var(--espace-xl); }
.nav-lien {
  font-size: var(--taille-sm);
  font-weight: 500;
  color: var(--couleur-bois-fonce);
  transition: color var(--transition);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-lien:hover { color: var(--couleur-terre); }
.nav-item--dropdown { position: relative; }
.nav-chevron { transition: transform var(--transition); }
.nav-lien--dropdown[aria-expanded="true"] .nav-chevron { transform: rotate(180deg); }

.nav-dropdown {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  background-color: var(--couleur-ivoire);
  border: 1px solid var(--couleur-lin);
  border-radius: var(--rayon-lg);
  padding: var(--espace-sm) 0;
  min-width: 240px;
  box-shadow: 0 8px 24px rgba(60,40,20,0.08);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition);
}
.nav-lien--dropdown[aria-expanded="true"] + .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.nav-dropdown__lien {
  display: flex;
  align-items: center;
  gap: var(--espace-sm);
  padding: 0.6rem var(--espace-lg);
  font-size: var(--taille-sm);
  color: var(--couleur-bois-fonce);
  transition: background-color var(--transition), color var(--transition);
}
.nav-dropdown__lien:hover { background-color: var(--couleur-lin); color: var(--couleur-terre); }
.nav-dropdown__puce { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }

.nav-burger { display: none; flex-direction: column; gap: 5px; padding: 4px; }
.nav-burger__barre { display: block; width: 24px; height: 2px; background-color: var(--couleur-terre); border-radius: 2px; transition: var(--transition); }

@media (max-width: 768px) {
  .nav-burger { display: flex; }
  .nav-menu {
    position: fixed;
    top: 70px; left: 0; right: 0; bottom: 0;
    background-color: var(--couleur-ivoire);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: var(--espace-lg);
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform 0.3s ease;
  }
  .nav-menu.nav-menu--ouvert { transform: translateX(0); }
  .nav-item { width: 100%; border-bottom: 1px solid var(--couleur-lin); }
  .nav-lien { display: flex; width: 100%; padding: var(--espace-md) 0; font-size: var(--taille-base); }
  .nav-dropdown {
    position: static;
    transform: none;
    box-shadow: none;
    border: none;
    border-radius: 0;
    padding: 0 0 0 var(--espace-md);
    opacity: 1;
    visibility: visible;
    display: none;
  }
  .nav-lien--dropdown[aria-expanded="true"] + .nav-dropdown { display: block; transform: none; }
  .nav-dropdown__lien { padding: 0.5rem 0; font-size: var(--taille-sm); }
}