how to crate a css script 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: calling css file in html

<link rel="stylesheet" href="styles.css">