/* ------------------------------------------------------------------ */
/*  Header — Nova Agency                                               */
/*  Navigation principale, logo et action secondaire.                  */
/* ------------------------------------------------------------------ */

/* Fond sombre : le logo officiel (blanc/or sur transparence) exige un
   backdrop sombre pour rester lisible — aucune boîte ni fond ajouté autour. */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--color-border-on-dark);
  background-color: rgb(var(--color-primary-rgb) / 0.94);
  backdrop-filter: blur(8px);
}

.site-header__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3) var(--space-6);
  min-height: 5.25rem;
}

.site-header__logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

/* Ratio d'origine conservé : hauteur fixée, largeur auto — jamais étiré. */
.site-header__logo-img {
  display: block;
  height: 2.75rem;
  width: auto;
  transition: opacity var(--dur-fast) ease;
}

.site-header__logo:hover .site-header__logo-img {
  opacity: 0.85;
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  margin-left: auto;
}

.site-header__menu {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-5);
  padding: 0;
  margin: 0;
  list-style: none;
}

.site-header__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 2.5rem;
  color: var(--color-text-on-dark);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
}

.site-header__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 0.25rem;
  height: 2px;
  background-color: var(--color-gold);
  transition: right var(--dur-base) var(--ease-out);
}

.site-header__link:hover,
.site-header__link.is-active {
  color: var(--color-gold);
}

.site-header__link:hover::after,
  .site-header__link.is-active::after {
    right: 0;
  }

  .site-header__link:focus-visible {
    outline: 3px solid var(--color-gold);
    outline-offset: 2px;
  }

.site-header__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.75rem 1.1rem;
  border: 1px solid var(--color-gold);
  border-radius: 999px;
  background-color: var(--color-gold);
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  transition: transform var(--dur-fast) ease, background-color var(--dur-fast) ease, border-color var(--dur-fast) ease;
}

.site-header__cta:hover,
.site-header__cta:focus-visible {
  background-color: var(--color-gold-bright);
  border-color: var(--color-gold-bright);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.site-header__toggle {
  position: relative;
  z-index: 101;
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 0.3rem;
  width: 2.7rem;
  height: 2.7rem;
  padding: var(--space-2);
  border: 1px solid var(--color-border-on-dark);
  border-radius: var(--radius-sm);
  background-color: transparent;
}

.site-header__toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-on-dark);
  transition: transform var(--dur-base) var(--ease-out), opacity var(--dur-fast) ease;
}

.site-header.is-menu-open .site-header__toggle-bar:nth-child(1) {
  transform: translateY(0.45rem) rotate(45deg);
}

.site-header.is-menu-open .site-header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-header.is-menu-open .site-header__toggle-bar:nth-child(3) {
  transform: translateY(-0.45rem) rotate(-45deg);
}

@media (max-width: 40rem) {
  .site-header__nav {
    position: fixed;
    inset: 0;
    z-index: 99;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    gap: var(--space-6);
    padding: var(--space-6);
    background-color: var(--color-primary);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--dur-base) var(--ease-out), visibility 0s var(--dur-base);
  }

  .site-header.is-menu-open .site-header__nav {
    opacity: 1;
    visibility: visible;
    transition: opacity var(--dur-base) var(--ease-out), visibility 0s;
  }

  .site-header__toggle {
    display: inline-flex;
  }

  .site-header__menu {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    width: 100%;
  }

  .site-header__link {
    display: block;
    width: 100%;
    padding-block: var(--space-3);
    font-family: var(--font-display);
    font-size: clamp(2rem, 7vw, 3rem);
    font-weight: var(--font-weight-black);
    color: var(--color-text-on-dark);
  }

  .site-header__link::after {
    display: none;
  }

  .site-header__cta {
    width: 100%;
    justify-content: center;
    padding-block: 0.95rem;
    border-radius: 999px;
  }

  .site-header__link.is-active {
    color: var(--color-gold);
  }
}

/* Le header sombre est identique sur toutes les pages, accueil inclus :
   aucune exception transparente (le logo blanc l'exige). */

@media (max-width: 40rem) {
  .site-header__logo-img {
    height: 2.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__logo-img,
  .site-header__link::after,
  .site-header__cta {
    transition: none;
  }
}