.site-header {
  position: relative;
  z-index: var(--gl-z-header);
  background: var(--gl-bg-alt);
}

.site-header__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0.625rem var(--gl-gap);
  padding-block: 1.75rem 2rem;
}

.site-header__brand {
  grid-column: 2;
  justify-self: center;
  display: inline-flex;
  align-items: center;
}

.site-header__logo { width: auto; height: clamp(4.5rem, 1.5rem + 8.3vw, 8.5625rem); }

.site-header__name {
  font-family: var(--gl-font-head);
  font-size: 1.375rem;
  color: var(--gl-text-dark);
}

.site-nav { grid-column: 1 / -1; grid-row: 2; }

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__list li { position: relative; margin: 0; }

.site-nav__list a {
  display: block;
  padding: 0.85rem;
  font-family: var(--gl-font-head);
  font-size: 1.0625rem;
  font-weight: 400;
  line-height: 1.5;
  color: var(--gl-link-hover);
  white-space: nowrap;
}

.site-nav__list a::after {
  content: "";
  display: block;
  height: 2px;
  margin-top: 0.1rem;
  background: var(--gl-text-dark);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--gl-dur) var(--gl-ease);
}

.site-nav__list .current-menu-item > a { color: var(--gl-plum); }

.site-nav__list a:hover::after,
.site-nav__list a:focus-visible::after,
.site-nav__list .current-menu-item > a::after { transform: scaleX(1); }

/* Sous-menu : panneau sombre aligné sous l'entrée parente. */
.site-nav__list .sub-menu {
  position: absolute;
  top: calc(100% + 1.5625rem);
  left: -0.625rem;
  z-index: 5;
  width: 13.125rem;
  margin: 0;
  padding: 0.875rem 0;
  list-style: none;
  background: #1e1c1a;
  border: 0;
  border-radius: 0;
  box-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(0.375rem);
  transition: opacity var(--gl-dur) var(--gl-ease), transform var(--gl-dur) var(--gl-ease), visibility var(--gl-dur);
}

/* Passerelle invisible : le survol ne se coupe pas dans l'espace sous l'entrée. */
.site-nav__list .menu-item-has-children::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  height: 1.5625rem;
}

@media (min-width: 64em) {
  .site-nav__list li:hover > .sub-menu,
  .site-nav__list li:focus-within > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: none;
  }
}

.site-nav__list .sub-menu a {
  padding: 0.569rem 1.4rem;
  font-family: var(--gl-font-body);
  font-size: 0.875rem;
  line-height: 1.6;
  text-align: left;
  color: var(--gl-dark-text);
  white-space: normal;
}
.site-nav__list .sub-menu a::after { display: none; }
.site-nav__list .sub-menu a:hover,
.site-nav__list .sub-menu a:focus-visible { color: #fff; }

/* Bouton mobile */
.menu-toggle {
  grid-column: 3;
  justify-self: end;
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  background: none;
  border: 0;
  cursor: pointer;
}

.menu-toggle__bars { display: block; width: 1.5rem; }
.menu-toggle__bars span {
  display: block;
  height: 1px;
  background: var(--gl-text-dark);
  transition: transform var(--gl-dur) var(--gl-ease), opacity var(--gl-dur) var(--gl-ease);
}
.menu-toggle__bars span + span { margin-top: 0.375rem; }

.menu-toggle[aria-expanded="true"] .menu-toggle__bars span:nth-child(1) { transform: translateY(0.438rem) rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-toggle__bars span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] .menu-toggle__bars span:nth-child(3) { transform: translateY(-0.438rem) rotate(-45deg); }

/* --- Panneau plein écran en mobile --- */

.site-nav__head,
.site-nav__social,
.site-nav__more { display: none; }

@media (max-width: 63.99em) {
  /* En mobile : blason à gauche, bouton à droite. */
  .site-header__inner {
    grid-template-columns: auto 1fr;
    align-items: center;
    padding-block: 0.875rem;
  }

  .site-header__brand { grid-column: 1; justify-self: start; }
  .site-header__logo { height: 3.25rem; }

  .menu-toggle { grid-column: 2; justify-self: end; display: inline-flex; }

  /* Le panneau se déroule en hauteur, comme la référence. */
  .site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--gl-z-overlay);
    display: flex;
    flex-direction: column;
    height: 0;
    padding: 0 1.25rem;
    background: var(--gl-darker-bg);
    overflow: hidden;
    overscroll-behavior: contain;
    visibility: hidden;
    transition:
      height 0.45s cubic-bezier(0.5, 1, 0.89, 1),
      padding 0.45s cubic-bezier(0.5, 1, 0.89, 1),
      visibility 0s linear 0.45s;
  }

  .site-nav.is-open {
    height: 100vh;
    height: 100dvh;
    padding-block: 1.5rem 2rem;
    overflow-y: auto;
    visibility: visible;
    transition:
      height 0.45s cubic-bezier(0.5, 1, 0.89, 1),
      padding 0.45s cubic-bezier(0.5, 1, 0.89, 1),
      visibility 0s;
  }

  .site-nav__head { display: block; margin-bottom: 2.75rem; }
  .site-nav__logo img { width: auto; height: 3.75rem; }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0;
    text-align: left;
  }
  .site-nav__list > li { border: 0; }

  .site-nav__list a {
    padding: 0;
    font-size: 1.375rem;
    line-height: 1.77;
    color: var(--gl-dark-text);
  }
  .site-nav__list a::after { display: none; }
  .site-nav__list .current-menu-item > a,
  .site-nav__list .current-menu-ancestor > a { color: #f9f9f9; }

  /* Entrée à sous-menu : libellé et flèche sur la même ligne */
  .site-nav__list .menu-item-has-children > a { display: inline-block; vertical-align: middle; }

  .site-nav__more {
    display: inline-flex;
    flex: 0 0 auto;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    margin-left: 0.5rem;
    padding: 0;
    color: var(--gl-dark-text);
    background: none;
    border: 0;
    cursor: pointer;
    vertical-align: middle;
  }
  .site-nav__more svg { transition: transform var(--gl-dur) var(--gl-ease); }
  .site-nav__more[aria-expanded="true"] svg { transform: rotate(90deg); }

  /* Sous-panneau : glisse par-dessus la liste */
  /* Le sous-menu se déroule aussi en hauteur. */
  .site-nav__list .sub-menu {
    position: static;
    display: block;
    min-width: 0;
    max-height: 0;
    margin: 0;
    padding: 0;
    background: none;
    border: 0;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.5, 1, 0.89, 1), margin 0.4s cubic-bezier(0.5, 1, 0.89, 1);
  }

  .site-nav__list .menu-item-has-children.is-open > .sub-menu {
    margin: 0.25rem 0 0.5rem;
  }

  .site-nav__list .sub-menu a {
    padding: 0.2rem 0 0.2rem 1rem;
    font-family: var(--gl-font-body);
    font-size: 1rem;
    line-height: 1.75;
    color: var(--gl-dark-text);
  }

  .site-nav__social {
    display: flex;
    gap: 1.25rem;
    margin: 2rem 0 0;
    padding: 1.75rem 0 0;
    list-style: none;
    border-top: 1px solid rgba(255, 255, 255, 0.18);
  }
  .site-nav__social li { margin: 0; }
  .site-nav__social a { color: var(--gl-dark-text); }
  .site-nav__social a:hover, .site-nav__social a:focus-visible { color: #fff; }

  /* La croix passe au-dessus du panneau */
  .menu-toggle { position: relative; z-index: calc(var(--gl-z-overlay) + 1); }
  .menu-toggle[aria-expanded="true"] .menu-toggle__bars span { background: var(--gl-dark-text); }
}

@media (max-width: 63.99em) and (prefers-reduced-motion: reduce) {
  .site-nav,
  .site-nav.is-open,
  .site-nav__list .sub-menu { transition: none; }
}