/* ───────── Mobile menu open state ───────── */
.nav--open .nav__links {
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--navy-deep);
  z-index: 100;
  align-items: center;
  justify-content: center;
  gap: 40px;
  padding: 80px 40px;
}
.nav--open .nav__links a {
  font-size: 22px;
  font-weight: 600;
  color: rgba(255,255,255,0.9);
  letter-spacing: 0.04em;
}
.nav--open .nav__menu-btn {
  position: fixed;
  top: 18px;
  right: var(--gutter, 32px);
  z-index: 101;
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.3);
}