/* =========================================================
   NAVBAR — navbar.css
   Barre de navigation desktop + menu burger mobile.
   Modifie ici la hauteur, l'opacité, la position.
   ========================================================= */

header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(11, 11, 13, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition), border-color var(--transition);
}

nav { max-width: var(--container-max); margin: 0 auto; padding: 1rem 2rem; }

nav .logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #fff;
  transition: color var(--transition);
}

nav .logo:hover { color: var(--accent-color); }

/* === Desktop nav === */
.desktop-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.desktop-nav ul {
  display: flex;
  list-style: none;
  gap: var(--space-md);
  align-items: center;
}

.desktop-nav a {
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 500;
  padding: 0.5rem 0;
  position: relative;
}

.desktop-nav a:hover,
.desktop-nav a.active {
  color: var(--accent-color);
}

.desktop-nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 1px;
  background: var(--accent-color);
  transition: width var(--transition);
}

.desktop-nav a:hover::after,
.desktop-nav a.active::after { width: 100%; }

/* === Mobile nav === */
.mobile-nav {
  display: none;
  align-items: center;
  justify-content: space-between;
}

.menu-toggle {
  background: none;
  border: none;
  color: var(--text-color);
  font-size: 1.4rem;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu {
  list-style: none;
  position: fixed;
  top: 70px; left: 0; right: 0;
  background: var(--bg-elevated);
  flex-direction: column;
  padding: var(--space-md);
  gap: var(--space-md);
  border-bottom: 1px solid var(--border-color);
  transform: translateY(-200%);
  transition: transform 0.4s ease;
}

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

.mobile-menu a {
  display: block;
  padding: 0.75rem 0;
  font-size: 1rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border-color);
}

/* === Responsive === */
@media (max-width: 768px) {
  .desktop-nav { display: none; }
  .mobile-nav { display: flex; }
}

/* === Marge pour le contenu fixé sous la navbar === */
main { padding-top: 70px; }

/* === Bouton de thème (dark/light) === */
.theme-toggle {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-color);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.95rem;
  transition: all var(--transition);
  margin-left: var(--space-sm);
}

.theme-toggle:hover {
  background: var(--accent-color);
  color: #fff;
  border-color: var(--accent-color);
  transform: rotate(15deg);
}

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

/* Variante mobile (alignement avec le burger) */
.mobile-nav .theme-toggle {
  margin-left: 0;
  margin-right: var(--space-xs);
}