how to do css code example

Example 1: start a css file

*{
    margin: 0;
    padding: 0;
    color: unset;
    box-sizing: border-box;
    text-decoration: none;
    outline: none;
    overflow-x: hidden;
}

Example 2: css

/* Answer to "css" */

/*
  Cascading Style Sheets (CSS) is a style sheet language used for
  describing the presentation of a document written in a
  markup language like HTML.

  In other words, it's the style of the website.

  For example, the positioning of everything on a website or
  the colour, shape, size of a button. Every design on a
  website is most likely made using css.
*/

Example 3: how to use css

<link rel="stylesheet" href="stylesheet.css">
<div class="mydiv"></div>
<style>
.mydiv {
background-color: /*Color*/;
color: /*Another color*/;
}
</style>

Example 4: what is css

Q: What is CSS?

A: Cascading Style Sheets is a style sheet language used for defining the
appearance of a text written in a markup language such as HTML. CSS is the
foundation code of the World Wide Web, alongside HTML and JavaScript.