Editor’s note: This How To assumes a basic understanding of HTML. Along with HTML and JavaScript, CSS forms the foundation of the open Web. These three technologies power just about every ...

Add a short CSS class to an HTML Web page to use animated and stationary GIF images as the page's background. Open an HTML document and find the document's head section.

In CSS, IDs (denoted by the hash) are always unique elements on the page, so whether or not the browser reads left-to-right or right-to-left, the selectors #menu ul li a are redundant anyway.

In other words, CSS is what makes a web page look good. While the default styles provided by web browsers are fine in a pinch, they're usually not enough to create a truly unique and visually ...

HTML and CSS use a box model, which means that page elements include margins, padding, background colors and, optionally, decorative borders. Open your HTML Web page in a text editor such as Notepad.

Google does render your page, knows the layout based on the rendering and make visually understand the structure of the page that way but not by simply looking at your CSS. Here are those tweets ...

Using an HTML tag to define CSS information is referred to as an inline style. The fact that style rules dictate that parent-level styles are overridden by page-level styles and page-level styles are ...

You don’t have to go global in your definition, as you can target specific elements on a page or other aspects by diving into the HTML and CSS—it’s not as daunting as you might think.