body.access-high-contrast {
      filter: contrast(200%);
    }
    body.access-dark-mode {
      background-color: #000;
      color: #fff;
    }
    body.access-light-mode {
      background-color: #fff;
      color: #000;
    }
    body.access-readable-font {
      font-family: Arial, sans-serif;
      font-size: 1.1em;
    }
    body.access-grey-scale {
      filter: grayscale(100%);
    }
    body.access-underline-links a {
      text-decoration: underline;
    }
    body.access-text-left {
      text-align: left;
    }
    .access-btn {
      position: fixed;
      top: 100px;
      right: 0;
      background: #003399;
      color: white;
      padding: 15px;
      border-radius: 5px 0 0 5px;
      cursor: pointer;
      z-index: 9999;
    }
    .access-panel {
      position: fixed;
      top: 100px;
      right: 60px;
      background: #fff;
      border: 1px solid #ccc;
      width: 250px;
      display: none;
      z-index: 9998;
      padding: 10px;
    }
    .access-panel button {
      display: block;
      width: 100%;
      margin: 5px 0;
    }