Tabs

import { customElement } from 'lit/decorators.js';
import Tabs from 'slab-elements/tabs.js';
import styles from './tabs.styles.js';
import tokens from './tokens.styles.js';

declare global {
  interface HTMLElementTagNameMap {
    'slab-styled-tabs': StyledTabs;
  }
}

/**
 * Tabs, styled: its Tabs sit on an ink rule, and the selected one is a block
 * of ink standing on it.
 */
@customElement('slab-styled-tabs')
export default class StyledTabs extends Tabs {
  static override styles = [tokens, styles];
}

import { css } from 'lit';

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

  [part~='tablist'] {
    border-block-end: 4px solid var(--ink);
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
  }

  :host([orientation='vertical']) {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: auto 1fr;

    & [part~='tablist'] {
      align-content: start;
      border-block-end: 0;
      border-inline-end: 4px solid var(--ink);
      flex-direction: column;
    }
  }
`;

import { customElement } from 'lit/decorators.js';
import Tab from 'slab-elements/tabs.tab.js';
import styles from './tabs.tab.styles.js';
import tokens from './tokens.styles.js';

declare global {
  interface HTMLElementTagNameMap {
    'slab-styled-tabs-tab': StyledTab;
  }
}

/**
 * Tab, styled: slab-serif capitals that invert to paper on ink when the Tab
 * is selected, with an ember cap.
 */
@customElement('slab-styled-tabs-tab')
export default class StyledTab extends Tab {
  static override styles = [tokens, styles];
}

import { css } from 'lit';

export default css`
  :host {
    border-block-start: 4px solid transparent;
    cursor: pointer;
    font-family: var(--font-display);
    font-size: 1.0625rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    padding: 0.5rem 1.125rem;
    text-transform: uppercase;
    transition:
      background-color 100ms,
      color 100ms;
  }

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

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

  /*
    The ring is inside the Tab, so on a selected one it's on ink, where ember
    falls short of 3:1 in the dark. The text's color always has the contrast.
  */
  :host(:state(selected):focus-visible) {
    outline-color: currentcolor;
  }

  :host(:state(selected)) {
    background-color: var(--ink);
    border-block-start-color: var(--ember);
    color: var(--paper);
  }

  :host(:state(disabled)) {
    background-color: transparent;
    color: var(--ash);
    cursor: not-allowed;
    text-decoration: line-through;
  }

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

import { customElement } from 'lit/decorators.js';
import Panel from 'slab-elements/tabs.panel.js';
import styles from './tabs.panel.styles.js';
import tokens from './tokens.styles.js';

declare global {
  interface HTMLElementTagNameMap {
    'slab-styled-tabs-panel': StyledPanel;
  }
}

/**
 * Panel, styled: room around its content, and the same focus ring as
 * everything else when it's focused itself.
 */
@customElement('slab-styled-tabs-panel')
export default class StyledPanel extends Panel {
  static override styles = [tokens, styles];
}

import { css } from 'lit';

export default css`
  :host {
    display: block;
    padding-block: 1.5rem;
  }

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

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);
  }
`;