@media (max-width: 768px) {
  .site-header__inner {
    flex-direction: column;
    gap: 12px;
  }
  .page-hero h1 {
    font-size: 26px;
  }
  .content-card {
    padding: 20px;
  }
  .site-nav {
    flex-wrap: wrap;
    justify-content: center;
  }
}