*Extra Code

file: wp-pregnancy-calculator/wp-pregnancy-calculator.php

<div class="modal fade" id="calculatorModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
    <div class="modal-dialog" role="document">
        <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
                <h4 class="modal-title" id="myModalLabel">Pregnancy Due Date Calculator + Week Guide</h4>
            </div>
            <div id="pregnancyContent">
               ...
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
            </div>
        </div>
    </div> 
</div>

CSS
file: wp-pregnancy-calculator/css/wpcc-front.css