The header section of the survey is controlled mostly by the style that is attached to the survey
<div class="headWrapper"> <span id="_responseView__pageView_Layout___headerZone"> <div id="_responseView__pageView_Layout___headerZone__headerPanel" class="surveyHeaderWrapper"> My Test Header </div> </span> <div class="clear"></div> </div>
In the sample code above you can see the text “My Test Header”, this data is coming from a style that is assigned to the survey.
For instance :
The header would then carry over any styles from your referenced style sheet.