I found this solution (i imagine the very basic of CSS know-how):
Or you can add another stylesheet to your theme directory and load it using conditional tags.
For example:
On your function.php
// Replace # with the ID of your custom page
if ( is_page( # ) ) {
wp_enqueue_style( 'path/to/your/custom/css/file' );
}
else wp_enqueue_style( 'path/to/your/original/css/file' );
This sure should work, i can change the css file only for the Buddy Press’s Groups page ID.
Unfortunately i have an animated headers and also animeted small GIFs inherit this cahange. I need another solution….