Hi,
In Odoo 15, CSS files can be added inside the static/src/css directory. Here, you can include your CSS code. For example, if media-breakpoint-up is the class to which you want to apply CSS, and you encounter issues with the CSS not taking effect, you can use the following approach with the !important rule:
.media-breakpoint-up(md) {
/* Your CSS code here */
/* For example: */
color: red !important;
}
Inside the manifest file, you can then include these CSS files using the 'assets' key. Below is an example:
'assets': {
'web.assets_backend' [
'module_name/static/src/scss/file_name.css',
],}
Ensure you replace 'module_name' with the actual name of your Odoo module, and make sure the file path is correct based on your module structure.
Hope it helps