I\'m trying to learn some of CSS3 and HTML5 but I\'m a little confused with somethings. For now, I want create a page with a fixed navbar on the top of page, that scrolls wi
Add margin-top to your content. The header is fixed - so it is not included within the flow of the document.
Also notice that you have opacity defined on your header - which causes you to slightly see the content when scrolling.
If this is not what you wanted - then remove it. (like so)
FIDDLE
#content{
margin-top: 100px;
z-index: 0;
position: absolute;
}