> For the complete documentation index, see [llms.txt](https://analog.groupthought.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://analog.groupthought.com/reference/utilities.md).

# Utilities & variants

The theme's Tailwind extensions: custom utility classes and variants, one page per category.

The theme's Tailwind extensions, one page per category. Full pages document stable API.

* [r-scale spacing](/reference/utilities/spacing.md): `r1–r15` gap, padding, margin, sizing, and hit areas
* [Type utilities](/reference/utilities/typography.md): `type-*` presets, `text-r*` sizing, font families, and resizing
* [Color utilities](/reference/utilities/color.md): semantic palette, mix palette, scheme classes, and stains
* [Layout utilities](/reference/utilities/layout.md): flex and grid helpers, layout spacing, and alignment
* [Custom variants](/reference/utilities/variants.md): `keyboard-focus:`, `touch:`, `nojs:`, `supports-*:`, and related variants
* [Effect utilities](/reference/utilities/effects.md): enter/exit animations, edge masks, and border gradients
* [Miscellaneous utilities](/reference/utilities/misc.md): hit areas, resets, stacking, and scrollbars