body {
    font-family: Arial, sans-serif;
    background-color: #f7f7f7;
    margin: 0;
    padding: 20px;
  }
  
  .checkout-container {
    max-width: 600px;
    margin: auto;
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
  }
  
  h2 {
    margin-top: 30px;
    font-size: 18px;
    color: white;
  }
  
  input[type="text"],
  input[type="tel"],
  input[type="email"],
  textarea {
    width: 100%;
    padding: 10px;
    margin-top: 8px;
    margin-bottom: 16px;
    border: 1px solid #ccc;
    border-radius: 5px;
  }
  
  textarea {
    height: 80px;
    resize: none;
  }
  
  .radio-group label,
  .options label {
    display: block;
    margin-bottom: 10px;
    font-size: 15px;
  }
  
  .invoice-toggle {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 20px 0;
  }
  
  .icon {
    height: 20px;
    vertical-align: middle;
    margin-right: 8px;
  }
  
  .btn-group {
    text-align: center;
    margin-top: 30px;
  }
  
  button {
    padding: 12px 25px;
    font-size: 16px;
    background-color: #28a745;
    border: none;
    color: white;
    border-radius: 6px;
    cursor: pointer;
  }
  
  button:hover {
    background-color: #218838;
  }