@media (prefers-reduced-motion: no-preference) {
      .hero-media {
        animation: drift 12s ease-in-out infinite alternate;
      }

      @keyframes drift {
        from { background-position: 0 0, 0 0, 0 0, 0 0; }
        to { background-position: 0 0, 18px -12px, -18px 14px, 0 0; }
      }
    }