Making a simple contribution page template
The template would not have anything to do with the styling to make it look like the rest of your website. Styling is in the CSS files. If you do not want to see the header, etc. just use display:none in your CSS file.

But... Are you talking about not seeing the embedded website header, nav, etc? If so, that has nothing to do with Civi templates. If this is case, the simple fix is also CSS display:none