improve search grid styles

* disable SSR module in 11ty

* remove first load fade

docs/.eleventy.js

@@ -7,10 +7,10 @@ import { highlightCodePlugin } from './_utils/highlight-code.js';
 import { markdown } from './_utils/markdown.js';
 import { removeDataAlphaElements } from './_utils/remove-data-alpha-elements.js';
 // import { formatCodePlugin } from './_utils/format-code.js';
-import litPlugin from '@lit-labs/eleventy-plugin-lit';
+// import litPlugin from '@lit-labs/eleventy-plugin-lit';
 import { readFile } from 'fs/promises';
 import nunjucks from 'nunjucks';
-import componentList from './_data/componentList.js';
+// import componentList from './_data/componentList.js';
 import * as filters from './_utils/filters.js';
 import { outlinePlugin } from './_utils/outline.js';
 import { replaceTextPlugin } from './_utils/replace-text.js';
@@ -29,7 +29,6 @@ const globalData = {
   package: packageData,
   isAlpha,
   layout: 'page.njk',
-
   server: {
     head: '',
     loginOrAvatar: '',
@@ -190,30 +189,30 @@ export default function (eleventyConfig) {
     eleventyConfig.addPassthroughCopy(glob);
   }
 
-  // SSR plugin
-  // Make sure this is the last thing, we dont want to run the risk of accidentally transforming shadow roots with the nunjucks 2nd transform.
-  if (!isDev) {
-    //
-    // Problematic components in SSR land:
-    //  - animation (breaks on navigation + ssr with Turbo)
-    //  - mutation-observer (why SSR this?)
-    //  - resize-observer (why SSR this?)
-    //  - tooltip (why SSR this?)
-    //
-    const omittedModules = [];
-    const componentModules = componentList
-      .filter(component => !omittedModules.includes(component.tagName.split(/wa-/)[1]))
-      .map(component => {
-        const name = component.tagName.split(/wa-/)[1];
-        const componentDirectory = process.env.UNBUNDLED_DIST_DIRECTORY || path.join('.', 'dist');
-        return path.join(componentDirectory, 'components', name, `${name}.js`);
-      });
-
-    eleventyConfig.addPlugin(litPlugin, {
-      mode: 'worker',
-      componentModules,
-    });
-  }
+  // // SSR plugin
+  // // Make sure this is the last thing, we don't want to run the risk of accidentally transforming shadow roots with the nunjucks 2nd transform.
+  // if (!isDev) {
+  //   //
+  //   // Problematic components in SSR land:
+  //   //  - animation (breaks on navigation + ssr with Turbo)
+  //   //  - mutation-observer (why SSR this?)
+  //   //  - resize-observer (why SSR this?)
+  //   //  - tooltip (why SSR this?)
+  //   //
+  //   const omittedModules = [];
+  //   const componentModules = componentList
+  //     .filter(component => !omittedModules.includes(component.tagName.split(/wa-/)[1]))
+  //     .map(component => {
+  //       const name = component.tagName.split(/wa-/)[1];
+  //       const componentDirectory = process.env.UNBUNDLED_DIST_DIRECTORY || path.join('.', 'dist');
+  //       return path.join(componentDirectory, 'components', name, `${name}.js`);
+  //     });
+  //
+  //   eleventyConfig.addPlugin(litPlugin, {
+  //     mode: 'worker',
+  //     componentModules,
+  //   });
+  // }
 
   return {
     markdownTemplateEngine: 'njk',

docs/_includes/grouped-pages.njk

@@ -3,8 +3,8 @@
 <section id="grid" class="index-grid">
 {% set groupedPages = allPages | groupPages(categories, page) %}
 {% for category, pages in groupedPages -%}
-  {% if groupedPages.meta.groupCount > 1 %}
-  <h2 class="index-category">
+  {% if groupedPages.meta.groupCount > 1 and pages.length > 0 %}
+  <h2 class="index-category" id="{{ category | slugify }}">
     {% if pages.meta.url %}<a href="{{ pages.meta.url }}">{{ pages.meta.title }}</a>
     {% else %}
     {{ pages.meta.title }}

docs/_includes/sidebar-link.njk

@@ -1,4 +1,4 @@
-{% if not (isAlpha and page.data.noAlpha) and not page.data.unlisted -%}
+{% if page | show -%}
 	<li>
 		<a href="{{ page.url }}">{{ page.data.title }}</a>
 		{% if page.data.status == 'experimental' %}<wa-icon name="flask"></wa-icon>{% endif %}

docs/_utils/filters.js

@@ -178,6 +178,10 @@ export function sort(arr, by = { 'data.order': 1, 'data.title': '' }) {
   });
 }
 
+export function show(page) {
+  return !(page.data.noAlpha && page.data.isAlpha) && !page.data.unlisted;
+}
+
 /**
  * Group an 11ty collection (or any array of objects with a `data.tags` property) by certain tags.
  * @param {object[]} collection
@@ -198,7 +202,7 @@ export function groupPages(collection, options = {}, page) {
     options = { tags: options };
   }
 
-  let { tags, groups, titles = {}, other = 'Other' } = options;
+  let { tags, groups, titles = {}, other = 'Other', filter = show } = options;
 
   if (groups === undefined && Array.isArray(tags)) {
     groups = tags;
@@ -237,6 +241,10 @@ export function groupPages(collection, options = {}, page) {
   let byUrl = {};
   let byParentUrl = {};
 
+  if (filter) {
+    collection = collection.filter(filter);
+  }
+
   for (let item of collection) {
     let url = item.page.url;
     let parentUrl = item.data.parentUrl;
@@ -313,6 +321,13 @@ export function groupPages(collection, options = {}, page) {
 
   if (sortedGroups) {
     ret = sortObject(ret, sortedGroups);
+  } else {
+    // At least make sure other is last
+    if (ret.other) {
+      let otherGroup = ret.other;
+      delete ret.other;
+      ret.other = otherGroup;
+    }
   }
 
   Object.defineProperty(ret, 'meta', {

docs/_utils/outline.js

@@ -39,7 +39,7 @@ export function outlinePlugin(options = {}) {
         }
 
         // Create a clone of the heading so we can remove links and [data-no-outline] elements from the text content
-        clone.querySelectorAll('a').forEach(a => a.remove());
+        clone.querySelectorAll('.wa-visually-hidden, [hidden], [aria-hidden="true"]').forEach(el => el.remove());
         clone.querySelectorAll('[data-no-outline]').forEach(el => el.remove());
 
         // Generate the link

docs/assets/scripts/filter.js

@@ -1,3 +1,11 @@
+function debounce(func, wait) {
+  let timeout;
+  return function (...args) {
+    clearTimeout(timeout);
+    timeout = setTimeout(() => func.apply(this, args), wait);
+  };
+}
+
 function updateResults(input) {
   const filter = input.value.toLowerCase().trim();
   let filtered = Boolean(filter);
@@ -18,8 +26,10 @@ function updateResults(input) {
   }
 }
 
+const debouncedUpdateResults = debounce(updateResults, 300);
+
 document.documentElement.addEventListener('input', e => {
   if (e.target?.matches('#block-filter wa-input')) {
-    updateResults(e.target);
+    debouncedUpdateResults(e.target);
   }
 });

docs/assets/scripts/theme-picker.js

@@ -1,12 +1,30 @@
+let initialPageLoadComplete = false;
+
+window.addEventListener('load', () => {
+  initialPageLoadComplete = true;
+});
+
 // Helper for view transitions
-export function domChange(fn, { behavior = 'smooth' } = {}) {
+export function domChange(fn, { behavior = 'smooth', ignoreInitialLoad = true } = {}) {
   const canUseViewTransitions =
     document.startViewTransition && !window.matchMedia('(prefers-reduced-motion: reduce)').matches;
 
+  // Skip transitions on initial page load
+  if (!initialPageLoadComplete && ignoreInitialLoad) {
+    fn(false);
+    return null;
+  }
+
   if (canUseViewTransitions && behavior === 'smooth') {
-    document.startViewTransition(fn);
+    const transition = document.startViewTransition(() => {
+      fn(true);
+      // Wait a brief delay before finishing the transition to prevent jumpiness
+      return new Promise(resolve => setTimeout(resolve, 200));
+    });
+    return transition;
   } else {
-    fn(true);
+    fn(false);
+    return null;
   }
 }
 

docs/assets/styles/docs.css

@@ -370,10 +370,22 @@ wa-page > main:has(> .index-grid) {
 
 .index-grid {
   display: grid;
-  grid-template-columns: repeat(auto-fit, minmax(min(22ch, 100%), 1fr));
+  grid-template-columns: repeat(4, 1fr);
   gap: var(--wa-space-2xl);
   margin-block-end: var(--wa-space-3xl);
 
+  @media screen and (max-width: 1470px) {
+    grid-template-columns: repeat(3, 1fr);
+  }
+
+  @media screen and (max-width: 960px) {
+    grid-template-columns: repeat(2, 1fr);
+  }
+
+  @media screen and (max-width: 500px) {
+    grid-template-columns: repeat(1, 1fr);
+  }
+
   a {
     border-radius: var(--wa-border-radius-l);
     text-decoration: none;

docs/docs/components/card.md

@@ -15,9 +15,9 @@ icon: card
 
   <strong>Mittens</strong><br />
   This kitten is as cute as he is playful. Bring him home today!<br />
-  <small>6 weeks old</small>
+  <small class="wa-caption-m">6 weeks old</small>
 
-  <div slot="footer">
+  <div slot="footer" class="wa-split">
     <wa-button variant="brand" pill>More Info</wa-button>
     <wa-rating label="Rating"></wa-rating>
   </div>
@@ -27,16 +27,6 @@ icon: card
   .card-overview {
     width: 300px;
   }
-
-  .card-overview small {
-    color: var(--wa-color-text-quiet);
-  }
-
-  .card-overview [slot='footer'] {
-    display: flex;
-    justify-content: space-between;
-    align-items: center;
-  }
 </style>
 ```
 
@@ -65,9 +55,9 @@ If using SSR, you need to also use the `with-header` attribute to add a header t
 
 ```html {.example}
 <wa-card with-header class="card-header">
-  <div slot="header">
+  <div slot="header" class="wa-split">
     Header Title
-    <wa-icon-button name="gear" variant="solid" label="Settings"></wa-icon-button>
+    <wa-icon-button name="gear" variant="solid" label="Settings" class="wa-size-m"></wa-icon-button>
   </div>
 
   This card has a header. You can put all sorts of things in it!
@@ -78,19 +68,9 @@ If using SSR, you need to also use the `with-header` attribute to add a header t
     max-width: 300px;
   }
 
-  .card-header [slot='header'] {
-    display: flex;
-    align-items: center;
-    justify-content: space-between;
-  }
-
   .card-header h3 {
     margin: 0;
   }
-
-  .card-header wa-icon-button {
-    font-size: var(--wa-font-size-m);
-  }
 </style>
 ```
 
@@ -103,7 +83,7 @@ If using SSR, you need to also use the `with-footer` attribute to add a footer t
 <wa-card with-footer class="card-footer">
   This card has a footer. You can put all sorts of things in it!
 
-  <div slot="footer">
+  <div slot="footer" class="wa-split">
     <wa-rating></wa-rating>
     <wa-button variant="brand">Preview</wa-button>
   </div>
@@ -113,12 +93,6 @@ If using SSR, you need to also use the `with-footer` attribute to add a footer t
   .card-footer {
     max-width: 300px;
   }
-
-  .card-footer [slot='footer'] {
-    display: flex;
-    justify-content: space-between;
-    align-items: center;
-  }
 </style>
 ```
 
@@ -153,7 +127,7 @@ Use the `size` attribute to change a card's size.
 <wa-card with-footer size="small">
   This is a small card.
 
-  <footer slot="footer" class="wa-flank">
+  <footer slot="footer" class="wa-split">
     <wa-button variant="brand" pill>More Info</wa-button>
     <wa-rating></wa-rating>
   </footer>
@@ -162,7 +136,7 @@ Use the `size` attribute to change a card's size.
 <wa-card with-footer size="medium">
   This is a medium card (default).
 
-  <footer slot="footer" class="wa-flank">
+  <footer slot="footer" class="wa-split">
     <wa-button variant="brand" pill>More Info</wa-button>
     <wa-rating></wa-rating>
   </footer>
@@ -171,14 +145,39 @@ Use the `size` attribute to change a card's size.
 <wa-card with-footer size="large">
   This is a large card.
 
-  <footer slot="footer" class="wa-flank">
+  <footer slot="footer" class="wa-split">
     <wa-button variant="brand" pill>More Info</wa-button>
     <wa-rating></wa-rating>
   </footer>
 </wa-card>
 </div>
-
 ```
 
-<style>
-</style>
+### Appearance
+
+Use the `appearance` attribute to change the card's visual appearance.
+
+```html {.example}
+<div class="wa-grid">
+<wa-card>
+  <img
+    slot="image"
+    src="https://images.unsplash.com/photo-1559209172-0ff8f6d49ff7?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=500&q=80"
+    alt="A kitten sits patiently between a terracotta pot and decorative grasses."
+  />
+  <div slot="header">Outlined (default)</div>
+  Card content.
+</wa-card>
+{% for appearance in ['outlined filled', 'outlined accent', 'plain', 'filled', 'accent'] -%}
+<wa-card appearance="{{ appearance }}">
+  <img
+    slot="image"
+    src="https://images.unsplash.com/photo-1559209172-0ff8f6d49ff7?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=500&q=80"
+    alt="A kitten sits patiently between a terracotta pot and decorative grasses."
+  />
+  <div slot="header">{{ appearance | capitalize }}</div>
+  Card content.
+</wa-card>
+{%- endfor %}
+</div>
+```

docs/docs/components/details.md

@@ -77,6 +77,31 @@ The details component automatically adapts to right-to-left languages:
 </wa-details>
 ```
 
+### Appearance
+
+Use the `appearance` attribute to change the element’s visual appearance.
+
+```html {.example}
+<div class="wa-stack">
+<wa-details summary="Outlined (default)">
+  Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna
+  aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
+</wa-details>
+<wa-details summary="Filled" appearance="filled">
+  Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna
+  aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
+</wa-details>
+<wa-details summary="Filled + Outlined" appearance="filled outlined">
+  Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna
+  aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
+</wa-details>
+<wa-details summary="Plain" appearance="plain">
+  Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna
+  aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
+</wa-details>
+</div>
+```
+
 ### Grouping Details
 
 Details are designed to function independently, but you can simulate a group or "accordion" where only one is shown at a time by listening for the `wa-show` event.

docs/docs/native/button.md

@@ -33,7 +33,7 @@ Use the [variant utility classes](../utilities/color.md) to set the button's sem
 
 ### Appearance
 
-Use the [appearance utility classes](../utilities/appearance.md) to change the button's visual appearance:
+Use the [appearance utility classes](/docs/utilities/appearance) to change the button's visual appearance:
 
 ```html {.example}
 <div style="margin-block-end: 1rem;">

docs/docs/native/callout.md

@@ -57,7 +57,7 @@ Use the [variant utility classes](../utilities/color.md) to set the callout's co
 
 ### Appearance
 
-Use the [appearance utility classes](../utilities/appearance.md) to change the callout's visual appearance (the default is `outlined filled`).
+Use the [appearance utility classes](/docs/utilities/appearance) to change the callout's visual appearance (the default is `outlined filled`).
 
 ```html {.example}
 <article class="wa-callout wa-brand wa-outlined wa-accent">

docs/docs/native/details.md

@@ -19,6 +19,35 @@ file: styles/native/details.css
 
 ## Examples
 
+### Appearance
+
+Use the [appearance utility classes](/docs/utilities/appearance) to change the element's visual appearance:
+
+```html {.example}
+<div class="wa-stack">
+<details>
+  <summary>Outlined (default)</summary>
+  Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna
+  aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
+</details>
+<details class="wa-filled">
+  <summary>Filled</summary>
+  Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna
+  aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
+</details>
+<details class="wa-filled wa-outlined">
+  <summary>Filled + Outlined</summary>
+  Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna
+  aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
+</details>
+<details class="wa-plain">
+  <summary>Plain</summary>
+  Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna
+  aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
+</details>
+</div>
+```
+
 ### Right-to-Left Languages
 
 The details styling automatically adapts to right-to-left languages:

src/components/card/card.css

@@ -5,15 +5,16 @@
 
   --spacing: var(--wa-space);
   --border-width: var(--wa-panel-border-width);
-  --border-color: var(--wa-color-surface-border);
+  --outlined-background-color: var(--wa-color-surface-default);
+  --outlined-border-color: var(--wa-color-surface-border);
   --border-radius: var(--wa-panel-border-radius);
-
   --inner-border-radius: calc(var(--border-radius) - var(--border-width));
+  --inner-border-color: var(--outlined-border-color);
 
   display: flex;
   flex-direction: column;
-  background-color: var(--wa-color-surface-default);
-  border-color: var(--border-color);
+  background-color: var(--background-color, var(--wa-color-surface-default));
+  border-color: var(--border-color, var(--wa-color-surface-border));
   border-radius: var(--border-radius);
   border-style: var(--wa-panel-border-style);
   box-shadow: var(--wa-shadow-s);
@@ -21,6 +22,20 @@
   color: var(--wa-color-text-normal);
 }
 
+:host(:is([appearance~='accent'], .wa-accent)) {
+  color: var(--text-color, var(--wa-color-text-normal));
+}
+
+:host([appearance~='filled']),
+:host(.wa-filled) {
+  --inner-border-color: oklab(from var(--outlined-border-color) l a b / 65%);
+}
+
+:host([appearance='plain']) {
+  --inner-border-color: transparent;
+  box-shadow: none;
+}
+
 /* Take care of top and bottom radii */
 .image,
 :host(:not([with-image])) .header,
@@ -46,10 +61,19 @@
   }
 }
 
+/* Round all corners for plain appearance */
+:host([appearance='plain']) .image {
+  border-radius: var(--inner-border-radius);
+
+  &::slotted(img) {
+    border-radius: inherit !important;
+  }
+}
+
 .header {
   display: block;
   border-block-end-style: inherit;
-  border-block-end-color: var(--border-color);
+  border-block-end-color: var(--inner-border-color);
   border-block-end-width: var(--border-width);
   padding: calc(var(--spacing) / 2) var(--spacing);
 }
@@ -62,7 +86,7 @@
 .footer {
   display: block;
   border-block-start-style: inherit;
-  border-block-start-color: var(--border-color);
+  border-block-start-color: var(--inner-border-color);
   border-block-start-width: var(--border-width);
   padding: var(--spacing);
 }

src/components/card/card.ts

@@ -2,6 +2,7 @@ import { html } from 'lit';
 import { customElement, property } from 'lit/decorators.js';
 import { HasSlotController } from '../../internal/slot.js';
 import WebAwesomeElement from '../../internal/webawesome-element.js';
+import appearanceStyles from '../../styles/utilities/appearance.css';
 import sizeStyles from '../../styles/utilities/size.css';
 import styles from './card.css';
 
@@ -22,19 +23,24 @@ import styles from './card.css';
  * @csspart footer - The container that wraps the card's footer.
  *
  * @cssproperty [--border-radius=var(--wa-panel-border-radius)] - The radius for the card's corners. Expects a single value.
- * @cssproperty [--border-color=var(--wa-color-surface-border)] - The color of the card's borders, including inner borders. Expects a single value.
+ * @cssproperty [--border-color=var(--wa-color-surface-border)] - The color of the card's borders. Expects a single value.
+ * @cssproperty [--inner-border-color=var(--wa-color-surface-border)] - The color of the card's inner borders, e.g. those separating headers and footers from the main content. Expects a single value.
  * @cssproperty [--border-width=var(--wa-panel-border-width)] - The width of the card's borders. Expects a single value.
  * @cssproperty [--spacing=var(--wa-space)] - The amount of space around and between sections of the card. Expects a single value.
  */
 @customElement('wa-card')
 export default class WaCard extends WebAwesomeElement {
-  static shadowStyle = [sizeStyles, styles];
+  static shadowStyle = [sizeStyles, appearanceStyles, styles];
 
   private readonly hasSlotController = new HasSlotController(this, 'footer', 'header', 'image');
 
   /** The component's size. Will be inherited by any descendants with a `size` attribute. */
   @property({ reflect: true, initial: 'medium' }) size: 'small' | 'medium' | 'large' | 'inherit' = 'inherit';
 
+  /** The card's visual appearance. */
+  @property({ reflect: true })
+  appearance: 'accent' | 'filled' | 'outlined' | 'plain' = 'outlined';
+
   /** Renders the card with a header. Only needed for SSR, otherwise is automatically added. */
   @property({ attribute: 'with-header', type: Boolean, reflect: true }) withHeader = false;
 

src/components/details/details.ts

@@ -9,6 +9,7 @@ import { getTargetElement, waitForEvent } from '../../internal/event.js';
 import { watch } from '../../internal/watch.js';
 import WebAwesomeElement from '../../internal/webawesome-element.js';
 import nativeStyles from '../../styles/native/details.css';
+import appearanceStyles from '../../styles/utilities/appearance.css';
 import { LocalizeController } from '../../utilities/localize.js';
 import '../icon/icon.js';
 import styles from './details.css';
@@ -45,7 +46,7 @@ import styles from './details.css';
  */
 @customElement('wa-details')
 export default class WaDetails extends WebAwesomeElement {
-  static shadowStyle = [nativeStyles, styles];
+  static shadowStyle = [appearanceStyles, nativeStyles, styles];
 
   private detailsObserver: MutationObserver;
   private readonly localize = new LocalizeController(this);
@@ -67,6 +68,9 @@ export default class WaDetails extends WebAwesomeElement {
   /** Disables the details so it can't be toggled. */
   @property({ type: Boolean, reflect: true }) disabled = false;
 
+  /** The element's visual appearance. */
+  @property({ reflect: true }) appearance: 'filled' | 'outlined' | 'plain' = 'outlined';
+
   firstUpdated() {
     this.body.style.height = this.open ? 'auto' : '0';
     if (this.open) {

src/styles/native/details.css

@@ -2,10 +2,12 @@ details:where(:not(:host *)),
 :host {
   --icon-color: var(--wa-color-text-quiet);
   --spacing: var(--wa-space-m);
+  --outlined-border-color: var(--wa-color-surface-border);
 
-  background-color: var(--wa-color-surface-default);
-  border: var(--wa-panel-border-width) var(--wa-color-surface-border) var(--wa-panel-border-style);
+  background-color: var(--background-color, var(--wa-color-surface-default));
+  border: var(--wa-panel-border-width) var(--border-color, var(--wa-color-surface-border)) var(--wa-panel-border-style);
   border-radius: var(--wa-panel-border-radius);
+  color: var(--text-color, inherit);
   padding: var(--spacing);
 
   /* Print styles */
@@ -19,6 +21,12 @@ details:where(:not(:host *)),
   }
 }
 
+details.wa-plain,
+:host(wa-details[appearance='plain']),
+:host(wa-details.wa-plain) {
+  border-radius: 0;
+}
+
 details:where(:not(:host *)) summary,
 :host summary /* nesting these summary styles in the rule above breaks in Firefox and Safari */ {
   display: flex;