I have a iframe <div class="quiz-container" style="text-align: center;" data-quiz="#######" data-preview="true" data-offset="0" data-autoscroll="yes"></div>
<script src="https://marketingfx.leadshook.io/s/js_embed"></script>
<div class="quiz-container" style="text-align: center;" data-quiz="#######" data-preview="true" data-offset="0" data-autoscroll="yes"></div>
<script src="https://marketingfx.leadshook.io/s/js_embed"></script>
and the output is a form i want to edit the form css. How can i edit the css?