/* ============================================================
   NAV.CSS — Navigation transparente devenant solide au scroll
   ============================================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  padding: 1.75rem 4rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: transparent;
  transition: background 0.4s ease, backdrop-filter 0.4s ease, padding 0.4s ease;
}

.nav.scrolled {
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding-block: 1.15rem;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--white);
  text-decoration: none;
  text-transform: uppercase;
}

.nav-logo span { color: var(--gold); }

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-links a {
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-decoration: none;
  opacity: 0.9;
  transition: color 0.3s ease, opacity 0.3s ease;
}

.nav-links a:hover {
  color: var(--gold);
  opacity: 1;
}

.nav-cta {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--dark);
  background: var(--gold);
  padding: 0.7rem 1.6rem;
  text-decoration: none;
  border: 1px solid var(--gold);
  transition: all 0.3s ease;
}

.nav-cta:hover {
  background: transparent;
  color: var(--gold);
}

/* ---- Menu mobile ---- */
.nav-toggle {
  display: none;
  padding: 0.5rem;
  z-index: 210;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--white);
  margin: 5px 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle.is-active span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.is-active span:nth-child(2) { opacity: 0; }
.nav-toggle.is-active span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.nav-mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 195;
  background: rgba(8, 8, 8, 0.97);
  backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2.25rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-12px);
  transition: opacity 0.4s var(--ease-slow), transform 0.4s var(--ease-slow), visibility 0.4s;
}

.nav-mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-mobile-menu a {
  font-family: var(--font-display);
  font-size: 1.6rem;
  text-decoration: none;
  letter-spacing: 0.04em;
}

.nav-mobile-menu a:hover { color: var(--gold); }

@media (max-width: 900px) {
  .nav { padding: 1.4rem 1.75rem; }
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: block; }
  .nav > .lang-switch { display: none; }
}

/* ---- Sélecteur de langue ---- */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-left: 1.5rem;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
}

.lang-switch a,
.lang-switch .lang-current {
  text-decoration: none;
  color: var(--text-muted);
  transition: color 0.25s ease;
}

.lang-switch .lang-current {
  color: var(--gold);
  font-weight: 600;
}

.lang-switch a:hover {
  color: var(--gold-light);
}

.lang-switch--mobile {
  margin: 1rem 0 0;
  font-size: 0.8rem;
  gap: 0.85rem;
}