.am-header { position: relative; }

/* Bannière */
.am-banner {
  position: relative;
  width: 100%;
  height: clamp(340px, 62vh, 640px);
  overflow: hidden;
  background: var(--beige);
}

.am-banner__slides { position: absolute; inset: 0; }

.am-banner__slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 1.2s ease-in-out;
}
.am-banner__slide.is-active { opacity: 1; }

.am-banner__veil {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(255,255,255,0) 55%, rgba(255,255,255,.55) 100%);
  pointer-events: none;
}

/* Logo */
.am-banner__logo {
  position: absolute;
  left: 50%;
  bottom: 4%;
  transform: translateX(-50%);
  width: min(320px, 42vw);
  display: block;
  z-index: 2;
}
.am-banner__logo img { width: 100%; height: auto; display: block; }

/* Menu */
.am-nav {
  background: var(--vert);
  position: sticky;
  top: 0;
  z-index: 50;
}

.am-nav__list {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
  list-style: none;
}

.am-nav__item + .am-nav__item { border-left: 1px solid rgba(255,255,255,.18); }

.am-nav__link {
  display: block;
  padding: 1.15rem 1.4rem;
  color: var(--beige);
  text-decoration: none;
  font-size: .82rem;
  font-weight: 300;
  letter-spacing: .12em;
  text-transform: uppercase;
  transition: background .25s ease, color .25s ease;
}
.am-nav__link:hover,
.am-nav__link:focus { background: var(--brun); color: #fff; }

/* Burger */
.am-nav__toggle {
  display: none;
  width: 100%;
  padding: 1rem;
  background: none;
  border: 0;
  cursor: pointer;
}
.am-nav__toggle span:not(.screen-reader-text) {
  display: block;
  width: 26px;
  height: 2px;
  margin: 5px auto;
  background: var(--beige);
  transition: transform .3s ease, opacity .3s ease;
}

@media (max-width: 900px) {
  .am-nav__toggle { display: block; }
  .am-nav__list { display: none; flex-direction: column; }
  .am-nav.is-open .am-nav__list { display: flex; }
  .am-nav__item + .am-nav__item {
    border-left: 0;
    border-top: 1px solid rgba(255,255,255,.18);
  }
  .am-nav__link { text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  .am-banner__slide { transition: none; }
}