/* ============================================================
   Header public : sticky, logo + nav, burger sous 900px
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgb(255 255 255 / 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

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

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--primary-dark);
  font-weight: 700;
}

.site-header__logo {
  height: 3.25rem;
  width: auto;
}

.site-header__brand-name {
  display: none;
  line-height: 1.2;
}

@media (min-width: 400px) {
  .site-header__brand-name {
    display: block;
  }
}

/* ----- Bouton burger (mobile) ----- */

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0.6rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  cursor: pointer;
}

.nav-toggle__line {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--primary-dark);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ----- Navigation ----- */

.site-nav {
  /* Mobile : panneau déroulant sous le header */
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  box-shadow: var(--shadow);
  display: none;
}

.site-nav.is-open {
  display: block;
}

.site-nav__list {
  display: flex;
  flex-direction: column;
  padding: var(--space-3) var(--gutter) var(--space-5);
  gap: var(--space-1);
}

.site-nav__list a {
  display: block;
  padding: var(--space-3) var(--space-3);
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 600;
  color: var(--primary-dark);
}

.site-nav__list a:hover,
.site-nav__list a[aria-current="page"] {
  background: var(--bg-soft);
  color: var(--primary-dark);
}

.site-nav__cta {
  margin-top: var(--space-3);
}

/* Agenda : bouton mis en avant, ouvre le calendrier en modale */
.site-nav__agenda {
  margin-top: var(--space-3);
}

.site-nav__list .site-nav__agenda .btn {
  display: flex;
  justify-content: flex-start;
  border-color: var(--accent-dark);
  color: var(--accent-dark);
  background: var(--surface);
}

.site-nav__list .site-nav__agenda .btn:hover,
.site-nav__list .site-nav__agenda .btn:focus-visible {
  border-color: var(--accent-dark);
  color: #fff;
  background: var(--accent-dark);
}

/* Le lien de nav est plus spécifique que .btn--primary : on force le blanc. */
.site-nav__cta .btn,
.site-nav__cta .btn:hover,
.site-nav__cta .btn:focus-visible {
  color: #fff;
  background: var(--accent-dark);
  box-shadow: none;
}

/* em : si l'utilisateur agrandit le texte, le menu se replie au lieu de déborder */
@media (min-width: 56.25em) {
  .nav-toggle {
    display: none;
  }

  .site-nav {
    position: static;
    display: block;
    background: none;
    border: none;
    box-shadow: none;
  }

  .site-nav__list {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: flex-end;
    align-items: center;
    padding: 0;
    gap: var(--space-1);
  }

  .site-nav__list a {
    padding: var(--space-2) var(--space-3);
  }

  .site-nav__agenda {
    margin-top: 0;
    margin-left: var(--space-3);
  }

  .site-nav__list .site-nav__agenda .btn {
    display: inline-flex;
  }

  .site-nav__cta {
    margin-top: 0;
    margin-left: var(--space-2);
  }
}