Use CSS code to style your site headers with borders and other design elements. HTML and CSS use a box model, which means that page elements include margins, padding, background colors and ...

Header code here Navigation bar code here Load the style sheet containing your CSS code. If you do not use separate style sheets, the CSS will be located between the tags at the top of your HTML file.

And we’ve also got a roundup of the best web design software for Mac. How to learn HTML and CSS and web design on your Mac: what you’ll need You don’t need much to create web pages in OS X.