Visual Studio Code allows you to use your own CSS in the Markdown preview tab.
Custom CSS for the Markdown preview can be implemented by using the "markdown.styles": [] setting in settings.json. The stylesheets can either be https URLs or relative paths to local files in the current workspace.
For example, to load a stylesheet called Style.css, we can update settings.json with the following line:
{
"markdown.styles": ["Style.css"]
}
It is possible to custom style the links to a note or placeholder. The links are an <a> tag. For notes use the class foam-note-link, for placeholders use foam-placeholder-link.
Foams offers the functionality to include other notes in your note. This will be displayed in the preview tab. Foam recognises a cyclic inclusion of notes and will display a warning when detected. The following html is used and can be custom styled using the class foam-cyclic-link-warning.
<div class="foam-cyclic-link-warning">
Cyclic link detected for wikilink: ${wikilink}
</div>