.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 3rem;
  height: var(--header-height);
  color: var(--color-fg);
  background-color: transparent; /* Transparent au debut */
  background: linear-gradient(to bottom, rgba(0,0,0,0.8) 0%, transparent 100%); /* Slight gradient for text readability */
  position: fixed;
  width: 100%;
  top: 0;
  left: 0;
  z-index: 100;
  transition: background-color 0.4s ease, border-bottom 0.4s ease;
  border-bottom: 1px solid transparent;
}

.navbar.scrolled {
  background-color: var(--color-black); /* Opaque gris/noir au scroll */
  background: var(--color-black);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar__brand {
  font-size: 1.8rem;
  font-weight: 800;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: -0.5px;
}

.rts-logo {
  background-color: var(--rts-accent);
  color: var(--color-white);
  padding: 0.1rem 0.5rem;
  border-radius: 4px;
  font-weight: 900;
}

.navbar__list {
  display: flex;
  list-style: none;
  gap: 2rem;
  margin: 0;
  padding: 0;
  align-items: center;
}

.navbar__item {
  font-weight: 600;
  cursor: pointer;
  transition: color 0.2s ease-in-out;
  font-size: 1.05rem;
  color: var(--color-gray-light);
}

.navbar__item:hover {
  color: var(--color-white);
}

.navbar__item--profile span {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255,255,255,0.1);
  padding: 0.4rem 1rem;
  border-radius: 20px;
  transition: background 0.2s;
}

.navbar__item--profile span:hover {
  background: rgba(255,255,255,0.2);
}

@media (max-width: 768px) {
  .navbar {
    padding: 0 1rem;
  }
  .navbar__list {
    gap: 1rem;
  }
  .navbar__item {
    font-size: 0.9rem;
  }
}