@media (max-width: 900px) {
  .nav-links.is-open {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    gap: 0;
    padding: 8px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 14px;
    background: rgba(16, 27, 53, 0.98);
    box-shadow: 0 18px 40px rgba(3, 10, 28, 0.3);
  }

  .nav-links.is-open a {
    padding: 11px 13px;
    border-radius: 9px;
  }

  .nav-links.is-open a:hover {
    background: rgba(255, 255, 255, 0.08);
  }
}