@media (max-width: 780px) {
  header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem;
  }

  .header-nav {
    width: 100%;
    flex-wrap: wrap;
    gap: 0.35rem;
  }

  .nav-link {
    padding: 6px 10px;
    font-size: 0.6rem;
  }
}