# Additional CSS

**Additional CSS** section in the WordPress Customizer allows you to add custom CSS to style your site without modifying theme files.

Here's how to use this feature effectively:

<figure><img src="https://content.gitbook.com/content/dpNOzQyK5S9izuyBm1D9/blobs/UsaMRKvnPLyoiTwlJ57b/js.jpg" alt=""><figcaption></figcaption></figure>

#### **Customizing with Additional CSS**: <a href="#customizing-with-additional-css" id="customizing-with-additional-css"></a>

1. **Accessing Additional CSS**:
   * Go to **Appearance > Customize**.
   * Click on the **Additional CSS** section.
2. **Adding Custom CSS**:
   * In the text area, you can write or paste your custom CSS code.
   * As you type, you’ll see a live preview of your changes on the right side.
3. **Best Practices**:
   * **Target Specific Elements**: Use specific selectors to apply styles to particular elements.
   * **Keep It Organized**: Add comments to your CSS to make it easier to understand and maintain.
   * **Test Changes**: Use browser developer tools to test changes before adding them to the Additional CSS section.
4. **Common Uses**:
   * Overriding default theme styles.
   * Changing colors, fonts, and sizes.
   * Adding margins, padding, or borders.
   * Hiding or showing specific elements.

**Example:**

To change the background color of your site’s header:

```
.site-header { background-color: #f4f4f4;}
```