Cascading Style Sheet
/* comment */
CSS Styles
Pseudo Elements
Bootstrap
CSS describes how HTML elements are to be displayed. Also, CSS is used to control the style of a web document.
A CSS Style rule is made up of 3 parts.
- Selector: The HTML element at which a style will be applied.
- Property: A type of attribute of HTML tag.
- Value: The value assigned to properties.

Adding a Stylesheet to an HTML Document
There are 3 ways we can add a stylesheet to an HTML document.
- External Style
- Internal Style
- Inline Style