/* ============================================================
   nav.css — barre de navigation sticky
   ============================================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  z-index: 100;
  background-color: rgba(250, 245, 233, 0.0);
  backdrop-filter: blur(0);
  transition: background-color var(--t-base), backdrop-filter var(--t-base),
              box-shadow var(--t-base);
}

.nav.is-scrolled {
  background-color: rgba(250, 245, 233, 0.96);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 16px rgba(66, 15, 24, 0.08);
}

.nav__inner {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ---- Logo ---- */
.nav__logo {
  display: flex;
  flex-direction: column;
  font-family: var(--font-titre);
  font-weight: 700;
  color: var(--creme-light);
  line-height: 1;
  letter-spacing: 0.02em;
}

.nav__logo-titre {
  font-size: var(--fs-lg);
}

.nav__logo-sub {
  font-family: var(--font-corps);
  font-style: italic;
  font-size: var(--fs-xs);
  color: var(--or-light);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-top: 2px;
}

/* ---- Liens ---- */
.nav__links {
  display: flex;
  gap: var(--space-6);
  list-style: none;
  align-items: center;
}

.nav__links a {
  font-family: var(--font-corps);
  font-size: var(--fs-sm);
  color: var(--creme-light);
  letter-spacing: 0.04em;
  position: relative;
  padding: var(--space-2) 0;
  transition: color var(--t-fast);
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 1px;
  background-color: var(--or-light);
  transition: width var(--t-base), left var(--t-base);
}

.nav__links a:hover {
  color: var(--or-light);
}

.nav__links a:hover::after {
  width: 100%;
  left: 0;
}

.nav__links .nav__cta {
  padding: var(--space-2) var(--space-4);
  background-color: rgba(200, 151, 58, 0.25);
  color: var(--creme-light);
  border-radius: var(--radius-sm);
  border: 1px solid var(--or);
}

.nav__links .nav__cta:hover {
  background-color: var(--or);
  color: var(--bordeaux-deep);
}

.nav__links .nav__cta::after { display: none; }

/* ---- Quand la nav est scrollee (fond creme) : couleurs sombres ---- */
.nav.is-scrolled .nav__logo {
  color: var(--bordeaux-deep);
}

.nav.is-scrolled .nav__logo-sub {
  color: var(--or-deep);
}

.nav.is-scrolled .nav__links a {
  color: var(--texte);
}

.nav.is-scrolled .nav__links a::after {
  background-color: var(--or);
}

.nav.is-scrolled .nav__links a:hover {
  color: var(--bordeaux);
}

.nav.is-scrolled .nav__links .nav__cta {
  background-color: var(--bordeaux);
  color: var(--creme-light);
  border-color: transparent;
}

.nav.is-scrolled .nav__links .nav__cta:hover {
  background-color: var(--bordeaux-deep);
  color: var(--creme-light);
}

/* ---- Toggle mobile (hamburger) ---- */
.nav__toggle {
  display: none;
  width: 32px;
  height: 32px;
  position: relative;
  z-index: 110;
}

.nav__toggle span {
  display: block;
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--creme-light);
  transition: transform var(--t-base), opacity var(--t-base), top var(--t-base);
}

.nav.is-scrolled .nav__toggle span {
  background-color: var(--bordeaux-deep);
}

.nav__toggle span:nth-child(1) { top: 8px; }
.nav__toggle span:nth-child(2) { top: 15px; }
.nav__toggle span:nth-child(3) { top: 22px; }

.nav.is-open .nav__toggle span:nth-child(1) {
  top: 15px;
  transform: rotate(45deg);
}
.nav.is-open .nav__toggle span:nth-child(2) {
  opacity: 0;
}
.nav.is-open .nav__toggle span:nth-child(3) {
  top: 15px;
  transform: rotate(-45deg);
}

/* ---- Responsive < 900px ---- */
@media (max-width: 900px) {
  .nav__toggle {
    display: block;
  }

  .nav__links {
    position: fixed;
    inset: 0;
    flex-direction: column;
    justify-content: center;
    background-color: var(--creme-light);
    transform: translateX(100%);
    transition: transform var(--t-base);
    gap: var(--space-6);
    padding: var(--space-10);
  }

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

  .nav__links a {
    font-size: var(--fs-lg);
    font-family: var(--font-titre);
  }
}