/* =============================================================================
   RGE2 — Structure
   En-tête, navigation, fil d'Ariane, pied de page, retour en haut.
   ============================================================================= */

/* ═════════════════════════════════════════════════════════════════
   BARRE DE CONFIANCE (au-dessus du header)
   ═════════════════════════════════════════════════════════════════ */
.topbar {
  background: var(--color-primary);
  color: rgba(255, 255, 255, .82);
  font-size: var(--text-xs);
}
.topbar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-2) var(--space-6);
  min-height: 38px;
  padding-block: .35rem;
}
@media (min-width: 768px) {
  .topbar__inner { justify-content: space-between; }
}
.topbar__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-5);
  margin: 0;
  padding: 0;
  list-style: none;
}
.topbar__item {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
}
.topbar__item svg {
  width: 14px;
  height: 14px;
  color: var(--color-accent);
  flex-shrink: 0;
}
.topbar a { color: inherit; }
.topbar a:hover { color: var(--color-accent); }

.topbar__tagline {
  display: none;
  margin: 0;
  color: rgba(255, 255, 255, .6);
}
@media (min-width: 1024px) {
  .topbar__tagline { display: block; }
}

/* ═════════════════════════════════════════════════════════════════
   HEADER
   ═════════════════════════════════════════════════════════════════ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}
.site-header.is-stuck {
  box-shadow: var(--shadow);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: var(--header-height);
}

/* ── Marque ── */
.site-header__brand {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}
.site-header__brand :is(a, .custom-logo-link) {
  display: flex;
  align-items: center;
  gap: .65rem;
}
.site-header__brand img {
  max-height: 46px;
  width: auto;
}
.site-header__name {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--color-primary);
  line-height: 1.15;
}
.site-header__tagline {
  display: block;
  font-size: .68rem;
  font-weight: 500;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--color-muted);
}

/* ── Burger ── */
.site-header__burger {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 9px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}
.site-header__burger span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.site-header__burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.site-header__burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.site-header__burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Panneau de navigation ── */
.site-header__panel {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  max-height: calc(100vh - var(--header-height));
  overflow-y: auto;
  padding: var(--space-4) var(--gutter) var(--space-6);
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}
.site-header__panel.is-open { display: block; }

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav-menu li { position: relative; }

.nav-menu > li > a {
  display: block;
  padding: .65rem .75rem;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  border-radius: var(--radius-sm);
}
.nav-menu > li > a:hover,
.nav-menu > li.current-menu-item > a,
.nav-menu > li.current-menu-ancestor > a,
.nav-menu > li.current-menu-parent > a {
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

/* Sous-menus */
.nav-menu .sub-menu {
  display: none;
  margin: 0 0 .35rem;
  padding: 0 0 0 .85rem;
  list-style: none;
  border-left: 2px solid var(--color-border);
}
.nav-menu .sub-menu.is-open { display: block; }
.nav-menu .sub-menu a {
  display: block;
  padding: .5rem .75rem;
  font-size: var(--text-sm);
  color: var(--color-muted);
  border-radius: var(--radius-sm);
}
.nav-menu .sub-menu a:hover {
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

/* Bouton d'ouverture des sous-menus (injecté par le JS) */
.nav-submenu-toggle {
  position: absolute;
  top: 3px;
  right: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: transparent;
  border: none;
  color: var(--color-muted);
}
.nav-submenu-toggle svg {
  width: 14px;
  height: 14px;
  transition: transform var(--transition);
}
.nav-submenu-toggle[aria-expanded="true"] svg { transform: rotate(180deg); }

.site-header__actions {
  margin-top: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.site-header__actions .btn { width: 100%; }

/* ── Desktop ── */
@media (min-width: 1024px) {
  .site-header__burger { display: none; }

  .site-header__panel {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    position: static;
    max-height: none;
    overflow: visible;
    padding: 0;
    background: transparent;
    border: none;
    box-shadow: none;
  }

  .nav-menu {
    flex-direction: row;
    align-items: center;
    gap: 2px;
  }
  .nav-menu > li > a {
    padding: .55rem .8rem;
    white-space: nowrap;
  }

  .nav-menu .menu-item-has-children > a { padding-right: 1.6rem; }
  .nav-menu .menu-item-has-children > a::after {
    content: '';
    position: absolute;
    top: 50%;
    right: .65rem;
    width: 6px;
    height: 6px;
    margin-top: -4px;
    border-right: 1.6px solid currentColor;
    border-bottom: 1.6px solid currentColor;
    transform: rotate(45deg);
    opacity: .55;
  }

  .nav-menu .sub-menu {
    display: block;
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    min-width: 240px;
    margin: 0;
    padding: .4rem;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-left: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(6px);
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
    z-index: 50;
  }
  .nav-menu > li:hover > .sub-menu,
  .nav-menu > li:focus-within > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  .nav-menu .sub-menu a { padding: .55rem .75rem; color: var(--color-text); }

  .nav-submenu-toggle { display: none; }

  .site-header__actions {
    margin-top: 0;
    flex-direction: row;
  }
  .site-header__actions .btn { width: auto; }
}

/* ═════════════════════════════════════════════════════════════════
   FIL D'ARIANE
   ═════════════════════════════════════════════════════════════════ */
.breadcrumb {
  padding-block: var(--space-4) 0;
  font-size: var(--text-xs);
}
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .35rem .5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  color: var(--color-muted);
}
.breadcrumb__item + .breadcrumb__item::before {
  content: '';
  width: 5px;
  height: 5px;
  border-right: 1.4px solid currentColor;
  border-top: 1.4px solid currentColor;
  transform: rotate(45deg);
  opacity: .6;
}
.breadcrumb__item a { color: var(--color-muted); }
.breadcrumb__item a:hover { color: var(--color-primary); }
.breadcrumb__item--current { color: var(--color-text); font-weight: 500; }

/* Sur fond sombre (bandeaux des pages RGE) */
.hero .breadcrumb {
  position: relative;
  z-index: 1;
  padding-bottom: var(--space-2);
}
.hero .breadcrumb__item,
.hero .breadcrumb__item a { color: rgba(255, 255, 255, .6); }
.hero .breadcrumb__item a:hover { color: var(--color-accent); }
.hero .breadcrumb__item--current { color: rgba(255, 255, 255, .85); }

/* ═════════════════════════════════════════════════════════════════
   BLOC EXPERT
   ═════════════════════════════════════════════════════════════════ */
.expert-block {
  padding-block: var(--space-10);
  background: var(--color-primary);
  color: rgba(255, 255, 255, .8);
}
.expert-block__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
  text-align: center;
  padding: var(--space-7);
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: var(--radius-lg);
}
@media (min-width: 640px) {
  .expert-block__inner {
    flex-direction: row;
    align-items: flex-start;
    text-align: left;
    gap: var(--space-7);
  }
}

.expert-block__content { min-width: 0; }
.expert-block__photo { flex-shrink: 0; }
.expert-block__photo img {
  width: 104px;
  height: 104px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid rgba(255, 255, 255, .2);
}

.expert-block__label {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .2rem .7rem;
  margin-bottom: var(--space-3);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--color-accent);
  border: 1px solid rgba(232, 160, 32, .45);
  border-radius: var(--radius-pill);
}
.expert-block__name {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: .15rem;
}
.expert-block__role {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, .65);
  margin-bottom: var(--space-3);
}
.expert-block__bio {
  font-size: var(--text-sm);
  line-height: var(--leading-loose);
  color: rgba(255, 255, 255, .78);
  max-width: 62ch;
}

/* ═════════════════════════════════════════════════════════════════
   FOOTER
   ═════════════════════════════════════════════════════════════════ */
.site-footer {
  background: var(--color-dark);
  color: rgba(255, 255, 255, .68);
  font-size: var(--text-sm);
}

.site-footer__top {
  display: grid;
  gap: var(--space-8);
  padding-block: var(--space-10);
}
@media (min-width: 720px) {
  .site-footer__top { grid-template-columns: 1.4fr 1fr 1fr; }
}
@media (min-width: 1024px) {
  .site-footer__top { grid-template-columns: 1.6fr 1fr 1fr 1fr; }
}

.site-footer__brand-name {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: var(--space-3);
}
.site-footer__brand img {
  max-height: 48px;
  width: auto;
  margin-bottom: var(--space-4);
}
.site-footer__about {
  line-height: var(--leading-loose);
  max-width: 46ch;
}

.site-footer__col-title {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.site-footer__list {
  display: flex;
  flex-direction: column;
  gap: .55rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.site-footer a { color: rgba(255, 255, 255, .68); }
.site-footer a:hover { color: var(--color-accent); }

.site-footer__bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding-block: var(--space-5);
  border-top: 1px solid rgba(255, 255, 255, .12);
  font-size: var(--text-xs);
  text-align: center;
}
@media (min-width: 640px) {
  .site-footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}
.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem 1.25rem;
  justify-content: center;
}
.site-footer__copyright { margin: 0; }

/* ═════════════════════════════════════════════════════════════════
   RETOUR EN HAUT
   ═════════════════════════════════════════════════════════════════ */
.back-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: 50%;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition),
              visibility var(--transition), background var(--transition);
}
/* L'attribut hidden reste la source de vérité : il retire le bouton de
   l'arbre d'accessibilité tant qu'il n'est pas utile. */
.back-to-top:not([hidden]) {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}
.back-to-top:hover {
  background: var(--color-accent);
  transform: translateY(-3px);
}