      <h2>World Systems</h2>
      <p>Echoes, balance, corruption, and the Resonance Tree shape every run.</p>
      <ul>
        <li>Branching lore and character incarnations</li>
        <li>Two-sided tree progression (light/abyss)</li>
        <li>Secrets and long-form discovery</li>
      </ul>

      <h2>Community & Events</h2>
      <p>Participation can grant points, unlock quests, and reveal new echoes.</p>

      <h2>Device Integration (Optional)</h2>
      <p>ESP32 companions can unlock dungeons, puzzles, quests, and spell grammar inputs.</p>
    