play: block;
      margin: 25px auto 10px;
      padding: 8px 18px;
      background-color: var(--accent);
      color: #fff;
      border: none;
      border-radius: 6px;
      cursor: pointer;
      transition: background-color 0.3s ease;
    }

    .expand-btn:hover {
      background-color: #0056b3;
    }

    .code-block {
      display: none;
      background: #222;
      color: #ddd;
      padding: 20px;
      font-size: 0.85rem;
      border-radius: 8px;
      margin-top: 10px;
      white-space: pr