Note: You can customize the appearance of the overlay and iFrame to better match the design of your website.

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Customizing the Overlay

You can customize the overlay by adding additional CSS rules. Here are some examples:

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Changing the Background Color

You can change the background color of the overlay to make it darker or lighter: 
#saypien-survey-overlay {
  background-color: rgba(0, 0, 0, 0.7); /* Darker overlay */
}

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Adjusting the Overlay Position

You can adjust the position and size of the overlay: 
#saypien-survey-overlay {
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

​
Customizing the iFrame

You can also customize the iFrame by adding additional CSS rules. Here are some examples:

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Changing the Border

You can customize the style of the iFrame in many ways. For example, you can add a border around the iFrame: 
#saypien-survey-iframe {
  border: 1px solid #000; /* Add a border in your brand color */
}

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Adjusting the iFrame Size

You can adjust the size of the iFrame to better fit the content: 
#saypien-survey-iframe {
  width: 80%; /* Adjust width */
  height: 80%; /* Adjust height */
  margin: 5% auto; /* Center the iFrame */
}

​
Customizing the Close Button

You can customize the close button to match your website’s design:

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Changing the Close Button Style

You can change the appearance of the close button: 
#saypien-survey-close-button {
  background-color: #fff;
  border: none;
  padding: 10px 15px;
  font-size: 24px;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

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Example

Here is a complete example that combines the customization options mentioned above: 
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Your Survey</title>
    <script src="https://saypien.io/plugins/saypien-survey.min.js"></script>
    <script>
      window.SaypienSurvey.initialize({
        buttonId: "myButton",
        surveyId: "<YOUR_SURVEY_ID>",
      });
    </script>
    <style>
      #saypien-survey-overlay {
        background-color: rgba(0, 0, 0, 0.7); /* Darker overlay */
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        z-index: 1000;
      }
      #saypien-survey-iframe {
        border: none; /* Remove border */
        width: 90%; /* Adjust width */
        height: 90%; /* Adjust height */
        margin: 5% auto; /* Center the iFrame */
        display: block;
        border-radius: 10px;
        box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
      }
      #saypien-survey-close-button {
        position: absolute;
        top: 10px;
        right: 10px;
        background-color: #fff;
        border: none;
        padding: 10px 15px;
        font-size: 24px;
        border-radius: 50%;
        cursor: pointer;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
      }
    </style>
  </head>
  <body>
    <h1>Welcome to the Survey</h1>
    <button id="myButton">Open Survey</button>
  </body>
</html>