New UI Foundations

#### What is New UI?

New UI is a modern, semantic UI framework for building beautiful, accessible websites and apps. It gives you all the core design foundations you need—colors, typography, spacing and sizing, reset, grid and layouts, and layering and elevations. It's designed to grow with you, from your first launch to millions of users. Thoughtfully designed for makers and teams who value scalability and function.

#### Install

To set up the project, open your terminal and run the following command:

``
npm i -D @new-ui/foundations
`

Note: This command installs all New UI foundation packages, which include reset, colors, effects, spacings, and typography. If you need to install only specific packages, refer to the New UI docs for instructions.

#### Import

Import the New UI foundations by adding the following line at the top of your SCSS file:

`scss
@use '@new-ui/foundations'; // Use @import for CSS
`

#### Set the theme

Set the theme by adding the data-new-ui-theme attribute to your HTML wrapper element, for example:

`html

`

| Available themes | Value |
| :--------------- | :------------ |
| Light (Default) | light |
| Light warm | light--warm |
| Light cold | light--cold |
| Dark (Default) | dark |
| Dark warm | dark--warm |
| Dark cold | dark--cold |

#### Utility classes, naming convention

- All classes associated with the New UI are prefixed with a global namespace followed by a hyphen: nu-
- In addition to a global namespace, we added prefixes to each class to make it more apparent what job that class is doing using BEM syntax.
- c- for UI components.
- l- for layout-related styles.
- u- for utilities.
- is- and has- for state-based classes.
- js- for targeting JavaScript-specific functionality.

---

$3

#### Colors

| Background | Role |
| :-------------------------------- | :---------------------------- |
| --background | Default app background |
| --background-secondary | Secondary app background |
| --background-hover | Background hover |
| --background-selected | UI element background |
| --background-selected-hover | UI element background hovered |
| --background-high-contrast | High contrast background |

| Border | Role |
| :--------------------- | :----------------------------- |
| --border-muted | Muted strokes and separators |
| --border | Default strokes and separators |
| --border-strong | Strong strokes and separators |
| --border-inked | Inked strokes and separators |
| --border-inverse | Inverse strokes and separators |
| --border-focus | Focus outline |

| Button | Role |
| :---------------------- | :------------------------- |
| --button | Primary button background |
| --button-hover | Primary button hover |
| --button-active | Primary button active |
| --button-disabled | Disabled button background |

| Link | Role |
| :------------------- | :--------------------------- |
| --link | Primary link |
| --link-hover | Hover state for primary link |
| --link-subtle | Secondary link |
| --link-visited | Link visited |

| Support | Role |
| :---------------------- | :---------- |
| --support-error | Error |
| --support-warning | Warning |
| --support-success | Success |
| --support-info | Information |

| Content | Role |
| :---------------------------- | :------------------------ |
| --content-primary | Primary body copy |
| --content-secondary | Secondary text color |
| --content-secondary-alt | Secondary text color alt |
| --content-placeholder | Placeholder text color |
| --content-on-color | Text on interactive color |
| --content-error | Error message |
| --content-success | Success message |
| --content-inked | Inked text |

#### Effects

| Shadows | Role |
| :-------------------- | :-------------------------------------------- |
| --dialog-strong | Modals, sidebar overlays, toasts |
| --dialog | Dropdown, tooltip, popover |
| --content | Content area, buttons, controls, cards, pills |
| --canvas | Background |
| --keyboard-key | Keyboard key component |

| Focus | Role |
| :-------------------- | :------------ |
| --focus-default | Default focus |
| --focus-accent | Accent focus |
| --focus-inverse | Focus inverse |

#### Spacings

| Token | Source | Size (px/rem) |
| :------------------- | :------------- | :------------ |
| --spacing-zero | --spacing-00 | 0 / 0 |
| --spacing-xs | --spacing-02 | 4 / 0.25 |
| --spacing-s | --spacing-04 | 8 / 0.5 |
| --spacing-m | --spacing-05 | 12 / 0.75 |
| --spacing-l | --spacing-06 | 16 / 1 |
| --spacing-xl | --spacing-08 | 24 / 1.5 |
| --spacing-xxl | --spacing-09 | 32 / 2 |
| --spacing-xxxl | --spacing-11 | 48 / 3 |

#### Sizing

| Token | Source | Size (px/rem) |
| :---------------------------- | :------------- | :------------ |
| --size-xs | --spacing-06 | 16 / 1 |
| --size-s | --spacing-08 | 24 / 1.5 |
| --size-m | --spacing-09 | 32 / 2 |
| --controls-size-default | --spacing-09 | 32 / 2 |
| --controls-size-small | --spacing-08 | 24 / 1.5 |

#### Typography

| Heading (Desktop) | Heading (Mobile) | Role |
| :------------------------- | :------------------------ | :--------- |
| --desktop-heading-01 | --mobile-heading-01 | Heading 01 |
| --desktop-heading-02 | --mobile-heading-02 | Heading 02 |
| --desktop-heading-03 | --mobile-heading-03 | Heading 03 |
| --desktop-heading-04 | --mobile-heading-04 | Heading 04 |
| --desktop-heading-05 | --mobile-heading-05 | Heading 05 |
| --desktop-heading-06 | --mobile-heading-06 | Heading 06 |

| Body (Desktop) | Body (Mobile) | Role |
| :---------------------- | :--------------------- | :--------- |
| --desktop-body-xl | --mobile-body-xl | Body large |
| --desktop-body | --mobile-body | Body copy |
| --desktop-body-sm | --mobile-body-sm | Body small |

| Utility (Desktop) | Utility (Mobile) | Role |
| :-------------------------- | :------------------------- | :---------- |
| --desktop-caption | --mobile-caption | Caption |
| --desktop-helper-text | --mobile-helper-text | Helper text |
| --desktop-code | --mobile-code | Code |

> Note: To set line height, simply add the prefix --lh to the font size variables. For instance, --desktop-body-xl becomes --lh-desktop-body-xl`.