body {
      font-family: Arial, sans-serif;
      background-color: #f4f4f4;
      padding: 20px;
    }

    .form-container {
      max-width: 600px;
      margin: auto;
      background: #fff;
      padding: 30px;
      border-radius: 8px;
      box-shadow: 0 0 10px rgba(0,0,0,0.1);
    }

    h2 {
      text-align: center;
    }

    .step {
      display: none;
    }

    .step.active {
      display: block;
    }

    label {
      display: block;
      margin: 10px 0 5px;
    }

    input[type="text"],
    input[type="email"],
    input[type="tel"] {
      width: 100%;
      padding: 8px;
      box-sizing: border-box;
    }

    .buttons {
      display: flex;
      justify-content: space-between;
      margin-top: 20px;
    }

    button {
      padding: 10px 20px;
      border: none;
      background-color: #007BFF;
      color: white;
      border-radius: 4px;
      cursor: pointer;
    }

    button:disabled {
      background-color: #aaa;
      cursor: not-allowed;
    }

    .confirm-data {
      background-color: #f9f9f9;
      padding: 15px;
      border-radius: 5px;
      margin-top: 10px;
    }