A CSS rule has two main parts: a selector, and one or more declarations:
The selector is normally the HTML element you want to style.
Each declaration consists of a property and a value.
The property is the style attribute you want to change. Each property has a value.
A CSS declaration always ends with a semicolon, and declaration groups are surrounded by curly brackets:
To make the CSS more readable, you can put one declaration on each line, like this:
Comments are used to explain your code, and may help you when you edit the source code at a later date. Comments are ignored by browsers.
A CSS comment begins with "/*", and ends with "*/", like this: