fix(sbb-flip-card): fix card summary image position

src/elements/flip-card/flip-card-details/flip-card-details.scss

@@ -19,18 +19,16 @@
 }
 
 .sbb-flip-card-details--wrapper {
-  display: grid;
-  grid-template-rows: 0fr;
+  position: absolute;
   pointer-events: none;
   color: var(--sbb-color-milk);
   opacity: var(--sbb-flip-card-details-opacity);
   transform: translateY(var(--sbb-flip-card-details-translate-y));
-  transition-property: grid-template-rows, transform, opacity;
+  transition-property: transform, opacity;
   transition-duration: var(--sbb-flip-card-details-transition-duration);
 
   :host([data-flipped]) & {
-    grid-template-rows: 1fr;
-    transition-delay: 0s, var(--sbb-flip-card-details-transition-delay),
+    transition-delay: var(--sbb-flip-card-details-transition-delay),
       var(--sbb-flip-card-details-transition-delay);
   }
 }

src/elements/flip-card/flip-card-summary/flip-card-summary.scss

@@ -12,26 +12,26 @@
 
 .sbb-flip-card-summary {
   display: grid;
-  position: absolute;
+  min-height: var(--sbb-flip-card-min-height);
   pointer-events: var(--sbb-flip-card-summary-pointer-events);
   opacity: var(--sbb-flip-card-summary-opacity);
   border-radius: var(--sbb-flip-card-border-radius);
   overflow: hidden;
-  grid-template-columns: 1fr;
-  grid-template-rows: auto 1fr;
+  grid-template-columns: minmax(0, 1fr);
+  grid-template-rows: auto minmax(0, 1fr);
   width: 100%;
   height: 100%;
   transition: all var(--sbb-flip-card-summary-transition-duration) ease-out;
   transition-delay: var(--sbb-flip-card-summary-transition-delay);
 
   :host([image-alignment='after']) & {
     @include sbb.mq($from: small) {
-      grid-template-columns: repeat(3, 1fr);
+      grid-template-columns: repeat(3, minmax(0, 1fr));
       grid-template-rows: 1fr;
     }
 
     @include sbb.mq($from: medium) {
-      grid-template-columns: repeat(2, 1fr);
+      grid-template-columns: repeat(2, minmax(0, 1fr));
       grid-template-rows: 1fr;
     }
   }
@@ -61,7 +61,6 @@
 }
 
 .sbb-flip-card-summary--image-wrapper {
-  max-height: var(--sbb-flip-card-min-height);
   grid-area: 2 / 1 / 3 / 2;
 
   :host([image-alignment='after']) & {

src/elements/flip-card/flip-card/flip-card.scss

@@ -75,10 +75,16 @@
   min-height: var(--sbb-flip-card-min-height);
   background-color: var(--sbb-flip-card-background-color);
   border-radius: var(--sbb-flip-card-border-radius);
-  transition: var(--sbb-flip-card-summary-transition-duration) ease-out;
+  transition:
+    all var(--sbb-flip-card-summary-transition-duration) ease-out,
+    min-height var(--sbb-flip-card-details-transition-duration);
   transition-delay: var(--sbb-flip-card-summary-transition-delay);
   cursor: pointer;
 
+  :host([data-flipped]) & {
+    min-height: max(var(--sbb-flip-card-min-height), var(--sbb-flip-card-details-height));
+  }
+
   @include sbb.if-forced-colors {
     &::after {
       content: '';

src/elements/flip-card/flip-card/flip-card.stories.ts

@@ -3,6 +3,7 @@ import type { InputType } from '@storybook/types';
 import type { Args, ArgTypes, Meta, StoryObj, Decorator } from '@storybook/web-components';
 import type { TemplateResult } from 'lit';
 import { html, nothing } from 'lit';
+import { styleMap } from 'lit/directives/style-map.js';
 
 import sampleImages from '../../core/images.js';
 
@@ -107,6 +108,39 @@ const LongContentTemplate = (args: Args): TemplateResult =>
     </sbb-flip-card-details>
   </sbb-flip-card>`;
 
+const GridTemplate = (args: Args): TemplateResult =>
+  html`<div
+    style=${styleMap({
+      display: 'grid',
+      gridTemplateRows: 'minmax(20rem, 1fr)',
+      gridTemplateColumns: 'repeat(2, 1fr)',
+      gridColumnGap: '1rem',
+      gridRowGap: '1rem',
+    })}
+  >
+    <sbb-flip-card accessibility-label=${args['accessibility-label']}>
+      ${cardSummary(args.label, args.imageAlignment, true)} ${cardDetails()}
+    </sbb-flip-card>
+    <sbb-flip-card accessibility-label=${args['accessibility-label']}>
+      ${cardSummary(args.label, args.imageAlignment, true)}
+      <sbb-flip-card-details>
+        Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam luctus ornare condimentum.
+        Vivamus turpis elit, dapibus eget fringilla pellentesque, lobortis in nibh. Duis dapibus
+        vitae tortor ullamcorper maximus. In convallis consectetur felis. Lorem ipsum dolor sit
+        amet, consectetur adipiscing elit. Nam luctus ornare condimentum. Vivamus turpis elit,
+        dapibus eget fringilla pellentesque, lobortis in nibh. Duis dapibus vitae tortor ullamcorper
+        maximus. In convallis consectetur felis.
+        <sbb-link href="https://www.sbb.ch" negative>Link</sbb-link>
+      </sbb-flip-card-details>
+    </sbb-flip-card>
+    <sbb-flip-card accessibility-label=${args['accessibility-label']}>
+      ${cardSummary(args.label, args.imageAlignment, true)} ${cardDetails()}
+    </sbb-flip-card>
+    <sbb-flip-card accessibility-label=${args['accessibility-label']}>
+      ${cardSummary(args.label, args.imageAlignment, true)} ${cardDetails()}
+    </sbb-flip-card>
+  </div>`;
+
 export const ImageAfter: StoryObj = {
   render: DefaultTemplate,
   argTypes: defaultArgTypes,
@@ -140,6 +174,12 @@ export const LongTitle: StoryObj = {
   },
 };
 
+export const Grid: StoryObj = {
+  render: GridTemplate,
+  argTypes: defaultArgTypes,
+  args: { ...defaultArgs, imageAlignment: imageAlignment.options![1] },
+};
+
 const meta: Meta = {
   decorators: [
     (story) => html`<div style="max-width: 792px;">${story()}</div>`,

src/elements/flip-card/flip-card/flip-card.ts

@@ -1,3 +1,4 @@
+import { ResizeController } from '@lit-labs/observers/resize-controller.js';
 import { type CSSResultGroup, html, isServer, LitElement, type TemplateResult } from 'lit';
 import { customElement, property, state } from 'lit/decorators.js';
 import { until } from 'lit/directives/until.js';
@@ -52,6 +53,11 @@
     return this.querySelector?.('sbb-flip-card-details');
   }
 
+  /** Returns the card details content element wrapper. */
+  private get _detailsContentElement(): HTMLElement | null {
+    return this.details!.shadowRoot!.firstElementChild as HTMLElement;
+  }
+
   /** Whether the flip card is flipped. */
   public get isFlipped(): boolean {
     return this._flipped;
@@ -62,6 +68,11 @@
 
   private _abort = new SbbConnectedAbortController(this);
   private _language = new SbbLanguageController(this);
+  private _cardDetailsResizeObserver = new ResizeController(this, {
+    target: null,
+    skipInitial: true,
+    callback: () => this._setCardDetailsHeight(),
+  });
 
   public override connectedCallback(): void {
     super.connectedCallback();
@@ -82,13 +93,24 @@
   /** Toggles the state of the sbb-flip-card. */
   public toggle(): void {
     this._flipped = !this._flipped;
+    if (this._flipped) {
+      this._setCardDetailsHeight();
+      this._cardDetailsResizeObserver.observe(this._detailsContentElement!);
+    } else {
+      this._cardDetailsResizeObserver.unobserve(this._detailsContentElement!);
+    }
     this.toggleAttribute('data-flipped', this._flipped);
     this.details!.toggleAttribute('data-flipped', this._flipped);
     this.summary!.inert = this._flipped;
     this.details!.inert = !this._flipped;
     this.flip.emit();
   }
 
+  private _setCardDetailsHeight(): any {
+    const contentHeight = Math.floor(this._detailsContentElement!.offsetHeight);
+    this.style?.setProperty('--sbb-flip-card-details-height', `${contentHeight}px`);
+  }
+
   private async _accessibilityLabel(): Promise<string> {
     if (isServer) {
       return '';

src/elements/flip-card/flip-card/flip-card.visual.spec.ts

@@ -1,4 +1,5 @@
 import { html, nothing, type TemplateResult } from 'lit';
+import { styleMap } from 'lit/directives/style-map.js';
 
 import {
   describeViewports,
@@ -9,6 +10,8 @@ import {
 import { waitForImageReady } from '../../core/testing/wait-for-image-ready.js';
 import type { SbbFlipCardImageAlignment } from '../flip-card-summary.js';
 
+import type { SbbFlipCardElement } from './flip-card.js';
+
 import './flip-card.js';
 import '../flip-card-summary.js';
 import '../flip-card-details.js';
@@ -22,13 +25,12 @@ const content = (
   title: string = 'Summary',
   imageAlignment: SbbFlipCardImageAlignment = 'after',
   longContent: boolean = false,
-  flipped = false,
 ): TemplateResult =>
   html`<sbb-flip-card-summary image-alignment=${imageAlignment}>
       <sbb-title level="4">${title}</sbb-title>
       <sbb-image slot="image" image-src=${imageUrl}></sbb-image>
     </sbb-flip-card-summary>
-    <sbb-flip-card-details ?data-flipped=${flipped}>
+    <sbb-flip-card-details>
       Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam luctus ornare condimentum.
       Vivamus turpis elit, dapibus eget fringilla pellentesque, lobortis in nibh.
       ${longContent
@@ -68,10 +70,13 @@ describe(`sbb-flip-card`, () => {
       'flipped',
       visualDiffDefault.with(async (setup) => {
         await setup.withFixture(
-          html`<sbb-flip-card data-flipped>
-            ${content('Summary', 'after', false, true)}</sbb-flip-card
-          >`,
+          html`<sbb-flip-card> ${content('Summary', 'after', false)}</sbb-flip-card>`,
         );
+        setup.withPostSetupAction(() => {
+          const flipCard =
+            setup.snapshotElement.querySelector<SbbFlipCardElement>('sbb-flip-card')!;
+          flipCard.click();
+        });
         await waitForImageReady(setup.snapshotElement.querySelector('sbb-image')!);
       }),
     );
@@ -104,6 +109,44 @@ describe(`sbb-flip-card`, () => {
       );
     }
 
+    for (const imageAlignment of ['after', 'below']) {
+      it(
+        `grid`,
+        visualDiffDefault.with(async (setup) => {
+          await setup.withFixture(
+            html` <div
+              style=${styleMap({
+                display: 'grid',
+                gridTemplateRows: 'minmax(20rem, 1fr)',
+                gridTemplateColumns: 'repeat(2, 1fr)',
+                gridColumnGap: '1rem',
+                gridRowGap: '1rem',
+              })}
+            >
+              <sbb-flip-card>
+                ${content('Summary', imageAlignment as SbbFlipCardImageAlignment, true)}
+              </sbb-flip-card>
+              <sbb-flip-card>
+                ${content('Summary', imageAlignment as SbbFlipCardImageAlignment, true)}
+              </sbb-flip-card>
+              <sbb-flip-card>
+                ${content('Summary', imageAlignment as SbbFlipCardImageAlignment, true)}
+              </sbb-flip-card>
+              <sbb-flip-card>
+                ${content('Summary', imageAlignment as SbbFlipCardImageAlignment, true)}
+              </sbb-flip-card>
+            </div>`,
+          );
+          setup.withPostSetupAction(() => {
+            const flipCard =
+              setup.snapshotElement.querySelector<SbbFlipCardElement>('sbb-flip-card')!;
+            flipCard.click();
+          });
+          await waitForImageReady(setup.snapshotElement.querySelector('sbb-image')!);
+        }),
+      );
+    }
+
     describe('forcedColors=true', () => {
       for (const state of [visualDiffDefault, visualDiffHover, visualDiffFocus]) {
         it(

src/elements/flip-card/flip-card/readme.md

@@ -11,6 +11,32 @@ It's meant to be used together with [sbb-flip-card-summary](/docs/elements-sbb-f
 </sbb-flip-card>
 ```
 
+## Style
+
+The `sbb-flip-card` component has a predefined minimum height that can be customized by specifying the `min-height` property directly in the style of the host element with a custom height. Alternatively, when used within a CSS grid layout alongside other cards, the height can be adjusted using the `grid-template-rows` property. For consistent behavior and flexibility, it is recommended to use the `minmax()` function, for example: `grid-template-rows: minmax(320px, 1fr)`.
+
+```html
+<div
+  style="display: grid; grid-template-rows: minmax(320px, 1fr); grid-template-columns: repeat(2, 1fr);"
+>
+  <sbb-flip-card>
+    <sbb-flip-card-summary>
+      <sbb-title> Card Title </sbb-title>
+      <sbb-image slot="image" image-src="..." alt="..."></sbb-image>
+    </sbb-flip-card-summary>
+    <sbb-flip-card-details> Some additional text. </sbb-flip-card-details>
+  </sbb-flip-card>
+
+  <sbb-flip-card>
+    <sbb-flip-card-summary>
+      <sbb-title> Card Title </sbb-title>
+      <sbb-image slot="image" image-src="..." alt="..."></sbb-image>
+    </sbb-flip-card-summary>
+    <sbb-flip-card-details> Some additional text. </sbb-flip-card-details>
+  </sbb-flip-card>
+</div>
+```
+
 ## Slots
 
 The component will display the content slotted in the `summary` slot in the main view, and the content slotted inside the `details` slot after the card has been flipped.