/* ==============================================
   NAV.CSS — Navigation premium dark navy
   Transparente sur hero → fond navy blur au scroll
   Liens discrets → or au hover/actif
   ============================================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  height: var(--nav-height);
  background-color: transparent;
  transition:
    background-color var(--transition-base),
    border-bottom    var(--transition-base),
    backdrop-filter  var(--transition-slow);
}

/* État scrollé */
.nav--scrolled {
  background-color: rgba(10, 25, 47, 0.88);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border-bottom: 1px solid rgba(188, 156, 34, 0.12);
}

/* -----------------------------------------------
   Conteneur
----------------------------------------------- */
.nav__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* -----------------------------------------------
   Logo / initiales
----------------------------------------------- */
.nav__logo {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wider);
  color: var(--color-gold);
  /* Encadrement discret */
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--color-gold-border);
  border-radius: var(--radius-sm);
  transition:
    background-color var(--transition-fast),
    color            var(--transition-fast),
    border-color     var(--transition-fast);
}

.nav__logo:hover {
  background-color: var(--color-gold-dim);
  border-color: var(--color-gold);
}

/* -----------------------------------------------
   Liens de navigation
----------------------------------------------- */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__link {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  letter-spacing: 0.01em;
  color: var(--color-text-muted);
  position: relative;
  padding-block: var(--space-2);
  transition: color var(--transition-fast);
}

/* Soulignement or au hover et actif */
.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-gold-light));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--transition-base);
}

.nav__link:hover {
  color: var(--color-text);
}

.nav__link.is-active {
  color: var(--color-gold-light);
}

.nav__link.is-active::after,
.nav__link:hover::after {
  transform: scaleX(1);
}

/* Bouton CTA "Contact" */
.nav__link--cta {
  padding: 0.45rem 1.1rem;
  border: 1px solid var(--color-gold-border);
  border-radius: var(--radius-full);
  color: var(--color-gold);
  font-weight: var(--weight-semi);
  letter-spacing: 0.01em;
  transition:
    background-color var(--transition-fast),
    border-color     var(--transition-fast),
    color            var(--transition-fast),
    box-shadow       var(--transition-fast);
}

.nav__link--cta::after {
  display: none;
}

.nav__link--cta:hover,
.nav__link--cta.is-active {
  background-color: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-bg);
  box-shadow: 0 0 18px var(--color-gold-dim);
}

/* -----------------------------------------------
   Burger menu — mobile
----------------------------------------------- */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 32px;
  height: 32px;
  padding: 0;
}

.nav__toggle-bar {
  display: block;
  width: 100%;
  height: 1.5px;
  background-color: var(--color-text-muted);
  border-radius: var(--radius-full);
  transition:
    transform   var(--transition-base),
    opacity     var(--transition-base),
    background  var(--transition-fast);
}

.nav__toggle:hover .nav__toggle-bar {
  background-color: var(--color-gold);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
  background-color: var(--color-gold);
}
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
  background-color: var(--color-gold);
}

/* -----------------------------------------------
   Mobile
----------------------------------------------- */
@media (max-width: 768px) {
  .nav__toggle { display: flex; }

  .nav__links {
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background-color: rgba(10, 25, 47, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(188, 156, 34, 0.12);
    padding: var(--space-4) var(--container-pad) var(--space-8);
  }

  .nav__links.is-open { display: flex; }

  .nav__link {
    width: 100%;
    padding-block: var(--space-5);
    border-bottom: 1px solid var(--color-border);
    font-size: var(--text-base);
  }

  .nav__link::after { display: none; }

  .nav__link--cta {
    margin-top: var(--space-5);
    border: 1px solid var(--color-gold-border);
    border-radius: var(--radius-full);
    padding: var(--space-3) var(--space-6);
    text-align: center;
    width: auto;
    align-self: flex-start;
  }

  .nav__link--cta:hover {
    background-color: var(--color-gold);
    color: var(--color-bg);
  }
}