Radio Group

import { customElement } from 'lit/decorators.js';
import RadioGroup from 'slab-elements/radio-group.js';
import styles from './radio-group.styles.js';
import tokens from './tokens.styles.js';

declare global {
  interface HTMLElementTagNameMap {
    'slab-styled-radio-group': StyledRadioGroup;
  }
}

/**
 * Radio Group, styled: its Radios laid in a row of cards, like bricks in a
 * course, wrapping when there isn't room.
 */
@customElement('slab-styled-radio-group')
export default class StyledRadioGroup extends RadioGroup {
  static override styles = [tokens, styles];
}

import { css } from 'lit';

export default css`
  :host {
    color: var(--ink);
    display: grid;
    font-family: var(--font-body);
  }

  [part~='label'] {
    font-family: var(--font-display);
    font-size: 1.0625rem;
    font-weight: 600;
    margin-block-end: 0.5rem;
  }

  :host(:state(required)) [part~='label']::after {
    color: var(--ember-deep);
    content: ' *' / '';
  }

  [part~='radios'] {
    display: grid;
    gap: 0.75rem;
    grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  }

  /*
    Spaced by what's in it rather than by a gap, so a description with
    nothing in it takes no room, and a control beside the field lines up
    with its bottom edge.
  */
  [part~='description'] {
    color: var(--ash);
    display: grid;
    font-size: 0.875rem;
  }

  ::slotted([slot='description']) {
    margin-block-start: 0.375rem;
  }

  [part~='validity-message'] {
    color: var(--ember-deep);
    font-weight: 600;
    margin-block-start: 0.375rem;

    &::before {
      content: '■ ' / '';
    }
  }
`;

import { customElement } from 'lit/decorators.js';
import Radio from 'slab-elements/radio-group.radio.js';
import styles from './radio-group.radio.styles.js';
import tokens from './tokens.styles.js';

declare global {
  interface HTMLElementTagNameMap {
    'slab-styled-radio-group-radio': StyledRadio;
  }
}

/**
 * Radio, styled: a card with a round mark in its corner. Checked, its border
 * turns ember and it lifts off the page on a hard shadow.
 */
@customElement('slab-styled-radio-group-radio')
export default class StyledRadio extends Radio {
  static override styles = [tokens, styles];
}

import { css } from 'lit';

export default css`
  :host {
    align-items: start;
    background-color: var(--paper);
    border: var(--border);
    cursor: pointer;
    display: grid;
    gap: 0.75rem;
    grid-template-columns: auto 1fr;
    padding: 0.875rem 1rem;
    transition:
      border-color 100ms,
      box-shadow 100ms,
      translate 100ms;
  }

  :host(:hover) {
    background-color: var(--chalk);
  }

  :host(:focus-visible) {
    outline: 3px solid var(--ember);
    outline-offset: 2px;
  }

  :host(:state(checked)) {
    background-color: var(--paper);
    border-color: var(--ember);
    box-shadow: var(--shadow);
    translate: -2px -2px;
  }

  :host(:state(disabled)) {
    border-style: dashed;
    box-shadow: none;
    color: var(--ash);
    cursor: not-allowed;
    translate: none;
  }

  /* The mark. Checked, an ember dot sits inside a ring of paper. */
  :host::before {
    background-color: var(--paper);
    block-size: 1.125rem;
    border: var(--border);
    border-radius: 50%;
    box-sizing: border-box;
    content: '';
    inline-size: 1.125rem;
    margin-block-start: 0.125rem;
  }

  :host(:state(checked))::before {
    background: radial-gradient(
      circle,
      var(--ember) 0 0.25rem,
      var(--paper) 0.3rem
    );
    border-color: var(--ember);
  }

  @media (prefers-reduced-motion: reduce) {
    :host {
      transition: none;
    }
  }
`;

import { css } from 'lit';

/*
  The styled components' palette and type, taken from the logo: ink for the
  courses, ember for the base, paper behind them.

  Each is a short alias for a "--slab-styled-*" property, with the default as
  its fallback. Retheming is "--slab-styled-ember" and the rest on ":root",
  which every shadow root inherits. Were the defaults declared under those
  names here instead, each host's own declaration would shadow the page's.

  Each default is "light-dark()", so the components follow the page's
  "color-scheme": "dark" for dark, "light" for light, and "light dark" to
  follow the operating system. Ink and paper trade places in the dark, so
  ink is always the text and paper always what's behind it. Contrast is given
  as light, then dark.
*/
export default css`
  :host {
    /* Secondary text. 6.8:1 and 6.9:1 on paper. */
    --ash: var(--slab-styled-ash, light-dark(#5e5a55, #a8a19a));
    --border: 2px solid var(--ink);

    /* Behind disabled and read-only controls, and hovered rows. */
    --chalk: var(--slab-styled-chalk, light-dark(#f4f1ec, #2b2926));

    /*
      The logo's orange, brighter in the dark. 4.25:1 and 5.2:1 on paper is
      enough for borders, fills and large text, but not always for small text,
      which takes "--ember-deep".
    */
    --ember: var(--slab-styled-ember, light-dark(#d9492a, #ec5f3b));

    /*
      Orange for small text on paper, and for paper text on it. 5.7:1 and
      7.4:1.
    */
    --ember-deep: var(--slab-styled-ember-deep, light-dark(#b3381a, #ff8566));
    --font-body: var(
      --slab-styled-font-body,
      'IBM Plex Sans',
      system-ui,
      sans-serif
    );
    --font-display: var(
      --slab-styled-font-display,
      'Zilla Slab',
      rockwell,
      'Roboto Slab',
      serif
    );
    --font-mono: var(
      --slab-styled-font-mono,
      'IBM Plex Mono',
      ui-monospace,
      monospace
    );
    --ink: var(--slab-styled-ink, light-dark(#1c1c1c, #f4f1ec));
    --paper: var(--slab-styled-paper, light-dark(#fff, #1a1918));

    /* The hard, offset shadow a raised surface casts. */
    --shadow: 4px 4px 0 var(--ink);
  }
`;