@media (max-width: 768px) {
  nav {
    padding: 0 20px;
  }

  .nav-logo {
    font-size: 16px;
  }

  .menu-toggle {
    display: flex;
    order: 3;
  }

  .theme-toggle {
    order: 2;
    margin-left: auto;
    margin-right: 15px;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: var(--grey-950);
    flex-direction: column;
    justify-content: center;
    transition: 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
    z-index: 1050;
  }

  .nav-links.active {
    right: 0;
  }

  .nav-links a {
    font-size: 18px;
    opacity: 1;
    color: var(--text-main);
  }

  footer {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }

  /* page-specific tweaks */
  .columns-grid {
    gap: 40px;
  }

  .info-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .lineage-row {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .contact-form {
    padding: 30px;
  }
}