HTML and CSS Reference
Monoplate content container is 1000 pixels wide, so
limit the container to that size, 1000px.
Define the content container in style.css
margin:0 auto; /* makes the content centered */
The #top , #header , #page backgrounds are at 100%
width, outside the 1000px limit, meaning that those
backgrounds will stretch from left to right in the
browser's window, regardless of inner content you
have ( see the previous image ).
Go for a div with class to call it several times within
the document. An ID div can be called only once in
the HTML page.