body {
      font-family: Arial, sans-serif;
   
      margin: 0;
      padding: 0;
    }

    .container11 {
      background-color: white;
      border-radius: 12px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
      padding: 30px;
      margin: 20px auto;
      text-align: center;
    }

    .container11 h2 {
      font-size: 28px;
      color: #333;
      margin-bottom: 20px;
    }

    .container11 p {
      font-size: 16px;
      color: #555;
      line-height: 1.6;
      text-align: justify;
    }

    .buttons1 button {
      background-color: #2980b9;
      color: white;
      padding: 10px 20px;
      margin: 5px;
      border: none;
      border-radius: 5px;
      cursor: pointer;
      font-weight: bold;
    }

    .buttons1 button:hover {
      background-color: #1c5980;
    }

    .content {
      display: none;
      background-color: white;
      border-radius: 10px;
      padding: 20px;
      margin: 20px auto;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    }

    .content.active {
      display: block;
    }

    pre {
      white-space: pre-wrap;
      font-family: inherit;
      line-height: 1.8;
      text-align: left;
    }