Reply To: Responsive Fixed Header with CSS

[burr]

If you set

#header {
    max-width: 640px;
    width: 100%; 
}

and remove the padding from #container you get some results, but its still not desirable.

The problem with position: fixed is that it takes the element out of the document ‘flow’ so it wont respect the padding applied to its parent.

Some things you might want to look at:
Positioining
Persistent Headers