Blogger restyle header

Here's my situation:

The orange area is the header area, the gray areas are title and description.

What's the css or html code to change the orange areas width? I want it to be the same width as the whole page(the light gray area). I have search on this and found that it can be changed by changing the "#header-wrapper" tag, but in my blog I don't have it. Any ideas?

My blog: free-apple-stu开发者_如何学编程ff-free.blogspot.com

Change the css of .content-outer to -

.content-outer{ width: 100% }
// Remove the max-width and min-width which are restricting the center content width.

This will make the all your page content moving to left since the content is occupying entire width.