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 ...

These three programming languages are tools that you can use to create, design and style your very own website.

You can style them with CSS to improve the default appearance. However, make sure you don’t get carried away and use tables for layout—for accessibility reasons, keep them strictly for data.