/* ==========================================================================
   HEADER.CSS
   En-tête fixe avec logo (icône image + nom en texte réel), navigation,
   et bouton CTA WhatsApp. Devient opaque au scroll (voir nav.js).
   ========================================================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: var(--z-header);
  display: flex;
  align-items: center;
  background-color: transparent;
  transition: background-color var(--transition-base), height var(--transition-base), box-shadow var(--transition-base);
}

/* Etat "scrolled" ajouté en JS quand l'utilisateur descend dans la page */
.header.is-scrolled {
  height: var(--header-height-scrolled);
  background-color: rgba(250, 249, 246, 0.96);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

/* ---------- Logo (icône + texte HTML réel, voir explication précédente) ---------- */
.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.logo__icon {
  width: 48px;
  height: 48px;
  object-fit: contain;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.logo:hover .logo__icon {
  transform: scale(1.05);
}

.logo__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo__name {
  font-family: var(--font-heading);
  font-weight: var(--fw-bold);
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  /* Couleur claire par défaut (hero sombre en arrière-plan), passe en marine au scroll */
  color: var(--color-white);
  transition: color var(--transition-base);
}

.logo__baseline {
  font-family: var(--font-body);
  font-size: 0.65rem;
  font-weight: var(--fw-medium);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gold-light);
  transition: color var(--transition-base);
}

.header.is-scrolled .logo__name {
  color: var(--color-navy);
}

.header.is-scrolled .logo__baseline {
  color: var(--color-gold-dark);
}

/* ---------- Navigation principale ---------- */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav__link {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-white);
  position: relative;
  padding-block: var(--space-xs);
  transition: color var(--transition-base);
}

.header.is-scrolled .nav__link {
  color: var(--color-navy);
}

/* Soulignement doré animé au survol / lien actif */
.nav__link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-gold);
  transition: width var(--transition-base);
}

.nav__link:hover::after,
.nav__link.is-active::after {
  width: 100%;
}

.nav__cta {
  padding: 0.65rem 1.5rem;
  font-size: var(--fs-sm);
}

/* ---------- Bouton burger (mobile) ---------- */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  z-index: var(--z-mobile-menu);
}

.nav__toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-white);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-base), background-color var(--transition-base);
}

.header.is-scrolled .nav__toggle span,
.nav__toggle.is-open span {
  background-color: var(--color-navy);
}

/* Animation croix quand le menu est ouvert */
.nav__toggle.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__toggle.is-open span:nth-child(2) {
  opacity: 0;
}
.nav__toggle.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ==========================================================================
   RESPONSIVE - Header mobile / tablette (voir aussi responsive.css)
   ========================================================================== */
@media (max-width: 960px) {
  .nav__toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    width: min(320px, 80vw);
    background-color: var(--color-off-white);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: calc(var(--header-height) + var(--space-lg)) var(--space-lg) var(--space-lg);
    box-shadow: var(--shadow-lg);
    transform: translateX(100%);
    transition: transform var(--transition-base);
  }

  .nav.is-open {
    transform: translateX(0);
  }

  .nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-md);
    width: 100%;
  }

  .nav__link {
    color: var(--color-navy);
    font-size: var(--fs-md);
  }

  .nav__cta {
    width: 100%;
    text-align: center;
    margin-top: var(--space-sm);
  }
}