/* ==========================================================================
   IBVB — Header / navigation
   ========================================================================== */

/* ---------- Barre d'annonce ---------- */
.announcement-bar {
  position: relative;
  z-index: var(--z-announcement);
  background: var(--color-night);
  color: var(--color-white);
  overflow: hidden;
  max-height: 44px;
  transition: max-height 0.35s var(--ease), opacity 0.25s var(--ease);
}
.announcement-bar.is-closed {
  max-height: 0;
  opacity: 0;
}
.announcement-bar__inner {
  max-width: var(--container-max);
  margin-inline: auto;
  padding: 0.65rem var(--container-pad);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  font-size: var(--fs-micro);
  font-weight: 500;
}
.announcement-bar__link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--color-white);
  font-weight: 600;
  text-decoration: none;
}
.announcement-bar__link:hover {
  color: var(--color-cyan);
}
.announcement-bar__link .arrow {
  transition: transform 0.25s var(--ease);
}
.announcement-bar__link:hover .arrow {
  transform: translateX(3px);
}
.announcement-bar__close {
  position: absolute;
  right: var(--container-pad);
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(250,249,246,0.6);
  border-radius: 50%;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
  flex-shrink: 0;
}
.announcement-bar__close:hover {
  color: var(--color-white);
  background: rgba(255,255,255,0.1);
}
.announcement-bar__close svg { width: 14px; height: 14px; }
@media (max-width: 640px) {
  .announcement-bar__inner { padding-right: 2.75rem; font-size: 0.78rem; }
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 500;
  background: rgba(250,249,246,0.9);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease), padding 0.3s var(--ease);
}
.site-header.is-scrolled {
  border-bottom-color: var(--color-line);
  box-shadow: 0 4px 24px rgba(11,17,48,0.05);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.15rem;
  transition: padding 0.3s var(--ease);
  min-width: 0;
}
.site-header.is-scrolled .site-header__inner {
  padding-block: 0.75rem;
}

/* Logo typographique temporaire */
.logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-display);
  color: var(--color-night);
  flex-shrink: 1;
  min-width: 0;
}
.logo__mark {
  width: 40px;
  height: 45px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
}
.logo__mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.logo__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  min-width: 0;
}
.logo__text strong {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.logo__text small {
  font-family: var(--font-body);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-ink-soft);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

/* Nav desktop */
.main-nav {
  display: none;
}
@media (min-width: 1024px) {
  .main-nav {
    display: flex;
    align-items: center;
    gap: 0.9rem;
  }
  .main-nav a {
    font-size: 0.87rem;
    font-weight: 500;
    color: var(--color-ink-soft);
    position: relative;
    padding: 0.3rem 0.05rem;
    transition: color 0.2s var(--ease);
    white-space: nowrap;
  }
  .main-nav a::after {
    content: '';
    position: absolute;
    left: 0; right: 100%;
    bottom: -2px;
    height: 2px;
    background: var(--color-cyan);
    border-radius: 2px;
    transition: right 0.3s var(--ease);
  }
  .main-nav a:hover,
  .main-nav a[aria-current="page"] {
    color: var(--color-night);
  }
  .main-nav a:hover::after,
  .main-nav a[aria-current="page"]::after {
    right: 0;
  }
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}
.header-actions .btn-secondary {
  display: none;
}
@media (min-width: 1600px) {
  .header-actions .btn-secondary { display: inline-flex; }
}
.header-actions .btn-primary {
  padding: 0.75rem 1.35rem;
}

/* Menu burger */
.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  flex-shrink: 0;
}
@media (min-width: 1024px) {
  .nav-toggle { display: none; }
}
.nav-toggle:hover { background: var(--color-ivory-2); }
.nav-toggle__lines {
  position: relative;
  width: 20px;
  height: 14px;
}
.nav-toggle__lines span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-night);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.2s var(--ease), top 0.3s var(--ease);
}
.nav-toggle__lines span:nth-child(1) { top: 0; }
.nav-toggle__lines span:nth-child(2) { top: 6px; }
.nav-toggle__lines span:nth-child(3) { top: 12px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__lines span:nth-child(1) {
  top: 6px; transform: rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__lines span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__lines span:nth-child(3) {
  top: 6px; transform: rotate(-45deg);
}

/* Menu mobile */
.mobile-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  max-width: 100vw;
  background: var(--color-ivory);
  z-index: 490;
  padding-top: 84px;
  transform: translateX(100%);
  transition: transform 0.4s var(--ease), visibility 0.4s;
  overflow-y: auto;
  overflow-x: hidden;
  visibility: hidden;
  pointer-events: none;
}
.mobile-nav.is-open {
  transform: translateX(0);
  visibility: visible;
  pointer-events: auto;
}
@media (min-width: 1024px) {
  .mobile-nav { display: none; }
}
.mobile-nav__inner {
  padding: 1.5rem var(--container-pad) 3rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.mobile-nav a {
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 600;
  color: var(--color-night);
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--color-line);
}
.mobile-nav__ctas {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}
.mobile-nav__ctas .btn { width: 100%; }

body.nav-open {
  overflow: hidden;
}