freeCodeCamp/guide/english/css/structure-of-css/index.md

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---
title: Structure of CSS
---
## CSS Structure
A CSS rule follows this basic structure:
```CSS
selector {
property: value;
property: value;
}
```
Everything inside the curly brackets styles whatever is selected by the [selector]. Inside a CSS rules is a set of [property]/value pairs.
You can have different selectors seperated with commas:
```CSS
selector1,
selector2 {
property: value;
}
```
Multiple CSS rules can be put in one CSS file - here is an example:
```CSS
h1 {
color: red;
}
div {
text-align: center;
color: blue;
}
img {
margin-left: 2px;
margin-top: 100px;
}
```
#### More Information:
- [CSS Syntax on Code The Web](https://codetheweb.blog/2017/11/11/css-syntax/)
- More on [CSS selectors][selector]
- More on [CSS properties][property]
[selector]: https://guide.freecodecamp.org/css/selectors
[property]: https://guide.freecodecamp.org/css/properties