What is CSS?

• CSS stands for Cascading Style Sheets
• CSS is the language for describing the presentation of Web pages, including colors, layout, and fonts.
• It allows one to adapt the presentation to different types of devices, such as large screens, small screens, or printers.
• CSS is independent of HTML and can be used with any XML-based markup language.

body {
    background-color: black;
}
h1 {
    color: red;
    text-align: center;
}
p {
    font-size: 20px;
}

Difference between with CSS HTML page and without CSS HTML Page