What alternative tools or languages can be used for dynamic CSS instead of PHP?

Dynamic CSS can also be achieved using JavaScript frameworks like React or Angular, which allow for dynamic rendering of CSS based on user interactions or data changes. Additionally, preprocessors like Sass or LESS can be used to generate dynamic CSS stylesheets by using variables, mixins, and functions.

```php
<?php
// This is a PHP code snippet, but for dynamic CSS using JavaScript frameworks like React or Angular, you can create components that conditionally apply CSS classes based on state or props.
// Alternatively, you can use preprocessors like Sass or LESS to generate dynamic CSS stylesheets.
?>