/* ============================================================
   DCP — En-tête
   ============================================================ */

/* Bandeau GitHub */

.site-banner {
  background-color: var(--text-primary);
  color: var(--bg);
  font-size: 0.875rem;
  padding: 0.5rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  position: relative;
  z-index: 200;
  transition: padding 200ms ease, font-size 200ms ease;
}

.site-banner.is-hidden { display: none; }

.banner-text { text-align: center; }

.banner-link {
  color: var(--accent-gold);
  font-weight: 600;
  text-decoration: none;
  margin-left: 0.5rem;
}

.banner-link:hover { text-decoration: underline; }

.banner-close {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: inherit;
  font-size: 1.25rem;
  cursor: pointer;
  line-height: 1;
  padding: 0.25rem;
  opacity: 0.7;
}

.banner-close:hover { opacity: 1; }
.banner-close:focus-visible {
  outline: 2px solid var(--accent-gold);
  outline-offset: 2px;
  border-radius: 2px;
}

/* En-tête principal */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg);
  box-shadow: none;
  transition: background-color 200ms ease, box-shadow 200ms ease;
}

.site-header[data-scrolled="true"] {
  box-shadow: var(--shadow-header);
}

/* Mode accueil : grand panneau centré */

body[data-page="accueil"] .site-header {
  position: fixed;
  width: 100%;
  background-color: transparent;
  top: 0;
}

body[data-page="accueil"] .site-header[data-scrolled="false"] .site-banner {
  /* Le bandeau est au-dessus du header en position fixed — géré via JS */
}

body[data-page="accueil"] .site-header[data-scrolled="false"] {
  background-color: transparent;
  box-shadow: none;
}

body[data-page="accueil"] .site-header[data-scrolled="true"] {
  background-color: var(--bg);
  box-shadow: var(--shadow-header);
}

/* Intérieur du header */

.header-inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding-block: 0.875rem;
  position: relative;
}

/* Mode accueil non scrollé : centrer verticalement */

body[data-page="accueil"] .site-header[data-scrolled="false"] .header-inner {
  flex-direction: column;
  gap: 0.375rem;
  padding-block: 2rem 1rem;
}

body[data-page="accueil"] .site-header[data-scrolled="false"] .header-logo {
  flex-direction: column;
  gap: 0.25rem;
}

body[data-page="accueil"] .site-header[data-scrolled="false"] .logo-img {
  height: 52px;
  width: auto;
}

body[data-page="accueil"] .site-header[data-scrolled="false"] .logo-name {
  font-size: 2rem;
}

body[data-page="accueil"] .site-header[data-scrolled="false"] .header-tagline {
  display: block;
}

body[data-page="accueil"] .site-header[data-scrolled="false"] .header-nav {
  margin-inline-start: 0;
}

body[data-page="accueil"] .site-header[data-scrolled="false"] .header-controls {
  position: absolute;
  top: 1.25rem;
  right: 1.5rem;
}

/* Logo */

.header-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  flex-shrink: 0;
}

/* Dimensionne par la hauteur : les deux fichiers du noeud n'ont pas le meme
   rapport largeur/hauteur, une boite carree les laisserait flotter au centre
   d'un vide. */
.logo-img {
  height: 32px;
  width: auto;
  display: block;
  transition: height 200ms ease;
}

.logo-name {
  font-family: 'Source Serif Pro', Georgia, serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

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

/* Tagline (accueil uniquement) */

.header-tagline {
  display: none;
  font-style: italic;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin: 0;
}

/* Navigation */

.header-nav {
  margin-inline-start: auto;
}

.nav-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  display: block;
  padding: 0.375rem 0.75rem;
  font-size: 0.9375rem;
  font-weight: 400;
  color: var(--text-primary);
  text-decoration: none;
  border-radius: 4px;
  position: relative;
  transition: color 150ms ease;
}

.nav-link:hover { color: var(--accent-gold-text); }

.nav-link--active {
  font-weight: 600;
  color: var(--text-primary);
}

.nav-link--active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0.75rem;
  right: 0.75rem;
  height: 2px;
  background-color: var(--accent-gold);
  border-radius: 1px;
}

.nav-link:focus-visible {
  outline: 2px solid var(--accent-gold);
  outline-offset: 2px;
}

/* Les sections d'une page, en sous-titres sous son entree : un petit
   panneau qui s'ouvre au survol et au focus clavier (focus-within), sans
   JavaScript. Il reste ouvert tant que le pointeur est dessus, la marge
   haute est comblee par le padding pour ne pas le perdre en descendant. */
.nav-item { position: relative; }

.nav-sous {
  list-style: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 14rem;
  margin: 0;
  padding: 0.5rem 0.25rem 0.375rem;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 150ms ease, transform 150ms ease, visibility 0s linear 150ms;
  z-index: 101;
}

.nav-item:hover .nav-sous,
.nav-item:focus-within .nav-sous {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity 150ms ease, transform 150ms ease, visibility 0s linear 0s;
}

/* Si la derniere entree du menu porte ses sections, son panneau s'ouvre
   vers la gauche : aligne a gauche il sortirait de la fenetre. Depuis que
   Ressources est passee dans le pied de page, la derniere entree est FAQ,
   qui n'en a pas : la regle ne s'applique plus a rien, et reste prete. */
.nav-list > .nav-item:last-child .nav-sous { left: auto; right: 0; }

.nav-sous-lien {
  display: block;
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 4px;
  white-space: nowrap;
}

.nav-sous-lien:hover { color: var(--accent-gold-text); background-color: var(--bg); }

.nav-sous-lien:focus-visible {
  outline: 2px solid var(--accent-gold);
  outline-offset: -2px;
}

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

/* Contrôles (thème + hamburger) */

.header-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.theme-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  background-color: var(--bg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  color: var(--text-primary);
  transition: border-color 150ms ease, background-color 150ms ease;
}

.theme-btn:hover {
  border-color: var(--accent-gold);
  background-color: rgba(191, 145, 0, 0.08);
}

.theme-btn:focus-visible {
  outline: 2px solid var(--accent-gold);
  outline-offset: 2px;
}

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

/* Hamburger — caché sur bureau */

.hamburger-btn {
  display: none;
  width: 36px;
  height: 36px;
  border-radius: 4px;
  border: 1.5px solid var(--border);
  background: none;
  cursor: pointer;
  font-size: 1.125rem;
  color: var(--text-primary);
  align-items: center;
  justify-content: center;
}

.hamburger-btn:focus-visible {
  outline: 2px solid var(--accent-gold);
  outline-offset: 2px;
}

/* Menu mobile */

.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background-color: var(--bg);
  z-index: 300;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 250ms ease;
}

.mobile-menu.is-open {
  transform: translateX(0);
}

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

.mobile-menu-inner {
  padding: 1.25rem 1.5rem;
  min-height: 100%;
  display: flex;
  flex-direction: column;
}

.mobile-menu-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.mobile-close-btn {
  width: 36px;
  height: 36px;
  border: none;
  background: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
}

.mobile-close-btn:focus-visible {
  outline: 2px solid var(--accent-gold);
  outline-offset: 2px;
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
}

.mobile-nav-link {
  display: block;
  padding: 0.875rem 0;
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--text-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}

.mobile-nav-link--active {
  font-weight: 700;
  color: var(--accent-gold-text);
}

.mobile-nav-link:focus-visible {
  outline: 2px solid var(--accent-gold);
  outline-offset: 2px;
}

/* Dans le menu mobile, les sections sont toujours visibles, en retrait
   sous leur entree, en plus petit : des sous-titres. */
.mobile-nav-sous {
  list-style: none;
  margin: 0 0 0.5rem;
  padding: 0 0 0 1.25rem;
}

.mobile-nav-sous-lien {
  display: block;
  padding: 0.5rem 0;
  font-size: 1rem;
  color: var(--text-secondary);
  text-decoration: none;
}

.mobile-nav-sous-lien:hover { color: var(--accent-gold-text); }

.mobile-nav-sous-lien:focus-visible {
  outline: 2px solid var(--accent-gold);
  outline-offset: 2px;
}

/* Responsive — mobile */

@media (max-width: 767px) {
  .header-nav { display: none; }
  .hamburger-btn { display: flex; }
  .mobile-menu { display: block; }

  body[data-page="accueil"] .site-header[data-scrolled="false"] .header-controls {
    position: static;
  }
}