While CSS files apply style instructions to general areas such as the background and the main document text, some CSS template files specify certain tags that may not match the tags in your document.

To use custom CSS in Obsidian, go to Settings > Appearance, scroll down to CSS snippets, enable it, and then place your .css files in the snippets folder that appears. Obsidian will automatically ...

How to Fix CSS on WordPress. WordPress uses a combination of PHP, HTML and CSS to render the appearance of a blog. If the CSS contains invalid code, the blog will fail to display as intended, as ...