/*
 * ════════════════════════════════════════════════════════════
 *  En-tête — ART au féminin
 *  Styles pour .site-nav (partial layouts/_header.html.erb).
 *  Chargé dans tous les layouts publics. Dépend de tokens.css.
 * ════════════════════════════════════════════════════════════
 */

/* ── Barre principale ───────────────────────────────────────── */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 3rem;
  background: rgba(var(--color-surface-rgb), 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 0.5px solid var(--color-hairline);
}

/* ── Logo ───────────────────────────────────────────────────── */
.site-nav-logo {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-primary-dark);
  text-decoration: none;
  flex-shrink: 0;
}

/* ── Liens ──────────────────────────────────────────────────── */
.site-nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.site-nav-links a,
.site-nav-btn {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-on-surface-variant);
  text-decoration: none;
  transition: color var(--transition-base);
  white-space: nowrap;
}
.site-nav-links a:hover,
.site-nav-btn:hover { color: var(--color-primary-dark); }

/* Bouton d'action stylé comme un lien (ex. « Accéder à la galerie ») */
.site-nav-btn {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
}

/* Décalage du contenu sous l'en-tête fixe */
main { padding-top: var(--site-nav-height); }

/* ── État actif ─────────────────────────────────────────────── */
.site-nav-active {
  color: var(--color-primary-dark) !important;
  border-bottom: 0.5px solid var(--color-primary-dark);
  padding-bottom: 1px;
}

/* ── Lien externe ───────────────────────────────────────────── */
.site-nav-external {
  color: var(--color-accent-text) !important; /* --color-accent-text (3.44:1) ne passait pas WCAG AA */
  border-bottom: 0.5px solid rgba(var(--color-accent-text-rgb), 0.35);
  padding-bottom: 1px;
}
.site-nav-external:hover {
  color: var(--color-accent-text-hover) !important;
  border-bottom-color: var(--color-accent-text-hover);
}

/* ── Lien galerie (emphase) ─────────────────────────────────── */
.site-nav-galerie {
  color: var(--color-primary-dark) !important;
  font-weight: 500;
}

/* ── Burger mobile ──────────────────────────────────────────── */
.site-nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem;
  color: var(--color-primary-dark);
}
.site-nav-burger span {
  display: block;
  width: 22px;
  height: 1px;
  background: currentColor;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* Burger → croix quand le menu est ouvert */
.site-nav-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.site-nav-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.site-nav-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ── Focus accessible ───────────────────────────────────────── */
.site-nav-links a:focus-visible,
.site-nav-btn:focus-visible,
.site-nav-catalogue:focus-visible,
.site-nav-burger:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
  border-radius: var(--radius-sm);
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 900px) {
  .site-nav { padding: 1rem 1.5rem; }
  .site-nav-links { gap: 1.2rem; }
  .site-nav-links a, .site-nav-btn, .site-nav-catalogue { font-size: var(--text-sm); }
}

@media (max-width: 640px) {
  .site-nav { padding: 1rem 1.2rem; }
  .site-nav-burger { display: flex; }
  .site-nav-links {
    display: none;
    position: fixed;
    top: 49px; left: 0; right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: rgba(var(--color-surface-rgb), 0.98);
    backdrop-filter: blur(12px);
    padding: 0.5rem 1.2rem 2rem;
    border-bottom: 0.5px solid var(--color-hairline);
    z-index: 99;
  }
  .site-nav-links.open { display: flex; }
  .site-nav-links a,
  .site-nav-btn,
  .site-nav-catalogue {
    padding: 0.85rem 0;
    width: 100%;
    border-bottom: 0.5px solid rgba(0,0,0,0.05);
    font-size: var(--text-sm);
  }
  .site-nav-catalogue,
  .site-nav-btn {
    border: none;
    padding-left: 0;
    text-align: left;
  }
  .site-nav-quit { color: var(--color-primary-dark) !important; font-weight: 500; }
}