CSS (Cascading Style Sheets) is a language used for describing the look and formatting of a document written in HTML. Here are some key properties:
color: Sets the color of the text. This property can accept named colors (e.g., color: red;), hexadecimal codes (e.g., color: #FF0000;), and RGB values (e.g., color: rgb(255,0,0);).font-size: Sets the size of the font. This property can accept values in pixels (e.g., font-size: 20px;), em (e.g., font-size: 1.5em;), and percentages (e.g., font-size: 120%;).font-family: Specifies the font for the text. You can specify multiple fonts as fallbacks (e.g., font-family: Arial, sans-serif;).text-align: Aligns the text. This property can accept values like left, right, center, and justify (e.g., text-align: center;).background-color: Sets the background color of an element. This property can accept the same types of values as the color property (e.g., background-color: yellow;).background-image: Sets a background image for an element. You can specify a URL for an image (e.g., background-image: url("image.jpg");).margin: Specifies the margin around an element. This property can accept one to four values, which represent the top, right, bottom, and left margins respectively (e.g., margin: 10px;).padding: Specifies the padding inside an element. This property works similarly to the margin property (e.g., padding: 20px;).border: Specifies the border around an element. This property can accept up to three values, which represent the width, style, and color of the border respectively (e.g., border: 1px solid black;).position: Specifies the type of positioning for an element. This property can accept values like static, relative, absolute, fixed, and sticky (e.g., position: absolute;).top, right, bottom, left: Position an element. These properties can accept values in pixels or percentages (e.g., top: 50px;).display: This property defines how an element should be displayed. Common values include block, inline, inline-block, and none (e.g., display: block;).