Where to edit the reference to custom.css

Hi,

Thanks for reaching out.

custom.css is loaded in templates/shaper_gazette/index.php, around line 133:

$theme->add_css('custom');

To add versioning, replace that line with:

$customCss = JPATH_THEMES . '/' . $this->template . '/css/custom.css';
$theme->add_css('custom.css', ['version' => file_exists($customCss) ? filemtime($customCss) : 'auto']);

This adds the file's last-modified time as the version (e.g. custom.css?1793617150). It updates automatically every time you save custom.css, so browsers always load the latest copy with no manual changes.

Please note:

• The version is only for browser cache-busting. It doesn't keep previous copies of the file, and Joomla doesn't store a history of template files. To roll back, use a backup (e.g. Akeeba Backup), Git, or a copy saved before each change.
• The stylesheet is only loaded if templates/shaper_gazette/css/custom.css exists.
• A template update will overwrite index.php, so keep a note of this change.

Let us know if you need any further help.

Best regards