# Front-end UI

- [CSS variables](https://docs.iglootheme.com/extending/front-end-ui/css.md): Igloo uses CSS custom properties (variables) for all theme related styling.
- [Buttons](https://docs.iglootheme.com/extending/front-end-ui/buttons.md): Markup for buttons
- [Grid](https://docs.iglootheme.com/extending/front-end-ui/grid.md): CSS grid with container, row and columns
- [Widgets](https://docs.iglootheme.com/extending/front-end-ui/widgets.md): Markup for creating a new widget
- [Forms](https://docs.iglootheme.com/extending/front-end-ui/forms.md): Markup for HTML forms
- [Typography](https://docs.iglootheme.com/extending/front-end-ui/typography.md): Some helper classes for headings and text
- [Helpers](https://docs.iglootheme.com/extending/front-end-ui/helpers.md): Here you can see a list of CSS helper classes. They can be found in the ig-base.css file


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