Questions about Deep Blue Template

I am having trouble replacing the header for the Deep Blue Template. Where can I find the HTML file and the CSS file for this template?

I want to replace the logo image with my own image. I selected the logo only - no text option. But when I do this, my logo image does not take up the full width of the box header box. Instead there is about 50 pixels of padding above the image and 35 pixels of padding below the image. When I analyze the space with Firebug, I see that this padding has been added to the HTML coding for the template. I would like to know where the file is for this HTML coding for this template so I can delete this extra padding.

There was one HTML template that provided the HTML code for the template. But the other three HTML templates did not include this code. It would be very helpful if all four HTML templates had a tab that contained the HTML code for the template.

The template that has a tab for the HTML code is called Beispiel. But I like the structure and appearance of the Deep Blue Template better. This was why I was hoping to get the HTML code for the Deep Blue Template.