# Theme Styling

- [Cornerstone CSS](/liquid/theme-styling/cornerstone-css.md): A minimal, responsive boilerplate for Kajabi Themes.
- [CSS Variables](/liquid/theme-styling/css-variables.md): Cornerstone introduces a new way of handling styles made possible through CSS custom properties.
- [Custom Site Styles](/liquid/theme-styling/custom-site-styles.md): Most CSS files in the assets folder will not target the Checkout Page or the Member Account Settings pages within a Site's theme.