Andreas Reinhold / reiniandClaude Opus 5
f90695cedd
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M3 Expressive top app bars (small, centered, medium and large flexible, search) that collapse with CSS sticky, docked and floating toolbars, primary and secondary tabs with a view-transition indicator, section navigation, the account menu and theme toggles. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01V9NnLxnPp8vaaurb3Z1MFy
189 lines
6.2 KiB
CSS
189 lines
6.2 KiB
CSS
/*
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* M3 Expressive's top app bars (AppBarTokens, AppBarSmallTokens, AppBarMediumFlexibleTokens,
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* AppBarLargeFlexibleTokens, androidx Compose Material 3, Apache-2.0).
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*
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* small 64px, title-large title (label-medium subtitle), 4px from the edges, the title 16px
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* from the start or straight after the navigation icon
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* center the same, the title centred
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* medium 112px (136px with a subtitle): the 64px row of icons over a headline-medium title
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* large 120px (152px with a subtitle): a display-small title
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* search the row holds a search bar
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*
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* The container is the surface, and surface-container once content scrolls under it. A medium or
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* large bar collapses into the small one without script moving anything: the bar is sticky at a
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* negative top, so it scrolls up until only 64px of it remain, while its row of icons is sticky at
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* 0 inside it and stays put — the big title scrolls away under the row. Script only says when that
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* has happened (resources/js/app-bar.js), so the small title can fade in and the colour change.
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*/
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@layer components {
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[data-app-bar] {
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--app-bar-row: 4rem;
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--app-bar-height: var(--app-bar-row);
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z-index: 20;
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display: block;
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min-height: var(--app-bar-height);
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padding-top: env(safe-area-inset-top);
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background-color: var(--md-sys-color-surface);
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color: var(--md-sys-color-on-surface);
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transition: background-color var(--md-sys-motion-effects-default-duration) var(--md-sys-motion-effects-default);
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}
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[data-app-bar][data-variant="medium"] {
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--app-bar-height: 7rem;
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}
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[data-app-bar][data-variant="medium"][data-subtitled] {
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--app-bar-height: 8.5rem;
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}
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[data-app-bar][data-variant="large"] {
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--app-bar-height: 7.5rem;
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}
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[data-app-bar][data-variant="large"][data-subtitled] {
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--app-bar-height: 9.5rem;
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}
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[data-app-bar][data-sticky] {
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position: sticky;
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top: 0;
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}
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/* `--app-bar-measured` is the bar's real height (a title can wrap), set by app-bar.js. */
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[data-app-bar][data-sticky]:is([data-variant="medium"], [data-variant="large"]) {
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top: calc(var(--app-bar-row) - var(--app-bar-measured, var(--app-bar-height)));
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}
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[data-app-bar][data-scrolled] {
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background-color: var(--md-sys-color-surface-container);
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}
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[data-app-bar-row] {
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position: sticky;
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top: 0;
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z-index: 1;
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display: flex;
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align-items: center;
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gap: 0;
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min-height: var(--app-bar-row);
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padding-inline: 0.25rem;
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background-color: inherit;
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}
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[data-app-bar-leading],
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[data-app-bar-trailing] {
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display: flex;
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flex: none;
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align-items: center;
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color: var(--md-sys-color-on-surface-variant);
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}
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[data-app-bar-leading] {
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color: var(--md-sys-color-on-surface);
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}
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[data-app-bar-trailing] {
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margin-inline-start: auto;
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}
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[data-app-bar-headline] {
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display: flex;
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min-width: 0;
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flex: 1 1 0%;
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flex-direction: column;
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justify-content: center;
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padding-inline: 0.75rem;
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}
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[data-app-bar-row]:has([data-app-bar-leading]) [data-app-bar-headline] {
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padding-inline-start: 0.25rem;
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}
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[data-app-bar-title] {
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overflow: hidden;
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text-overflow: ellipsis;
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white-space: nowrap;
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font: var(--md-sys-typescale-title-lg);
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letter-spacing: var(--md-sys-typescale-title-lg-tracking);
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}
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[data-app-bar-subtitle] {
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overflow: hidden;
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color: var(--md-sys-color-on-surface-variant);
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text-overflow: ellipsis;
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white-space: nowrap;
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font: var(--md-sys-typescale-label-md);
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letter-spacing: var(--md-sys-typescale-label-md-tracking);
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}
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/* Centred: the headline spans the row and centres its text between whatever is at either end. */
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[data-app-bar][data-variant="center"] [data-app-bar-headline] {
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position: absolute;
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inset-inline: 3.5rem;
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top: 0;
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bottom: 0;
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align-items: center;
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text-align: center;
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pointer-events: none;
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}
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/* The search bar fills the row. */
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[data-app-bar-search] {
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min-width: 0;
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flex: 1 1 0%;
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padding-inline: 0.25rem;
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}
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/* Medium and large: the row's title is the collapsed one, shown once the big one has gone. */
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[data-app-bar]:is([data-variant="medium"], [data-variant="large"]) [data-app-bar-row] [data-app-bar-headline] {
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opacity: 0;
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transition: opacity var(--md-sys-motion-effects-fast-duration) var(--md-sys-motion-effects-fast);
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}
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[data-app-bar][data-collapsed] [data-app-bar-row] [data-app-bar-headline] {
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opacity: 1;
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}
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/* Heights from the tokens: the title (and subtitle) lines and the space under them fill what the
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row leaves — 36 + 12px medium, 36 + 20 + 16px with a subtitle; 44 + 12px large, 44 + 24 + 20px. */
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[data-app-bar-expanded] {
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display: flex;
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min-height: calc(var(--app-bar-height) - var(--app-bar-row));
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flex-direction: column;
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justify-content: flex-end;
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padding-inline: 1rem;
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padding-bottom: 0.75rem;
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}
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[data-app-bar][data-subtitled] [data-app-bar-expanded] {
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padding-bottom: 1rem;
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}
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[data-app-bar][data-variant="large"][data-subtitled] [data-app-bar-expanded] {
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padding-bottom: 1.25rem;
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}
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[data-app-bar-expanded] [data-app-bar-title] {
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white-space: normal;
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font: var(--md-sys-typescale-headline-md);
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letter-spacing: var(--md-sys-typescale-headline-md-tracking);
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}
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[data-app-bar-expanded] [data-app-bar-subtitle] {
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font: var(--md-sys-typescale-label-lg);
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letter-spacing: var(--md-sys-typescale-label-lg-tracking);
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}
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[data-app-bar][data-variant="large"] [data-app-bar-expanded] [data-app-bar-title] {
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font: var(--md-sys-typescale-display-sm);
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letter-spacing: var(--md-sys-typescale-display-sm-tracking);
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}
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[data-app-bar][data-variant="large"] [data-app-bar-expanded] [data-app-bar-subtitle] {
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font: var(--md-sys-typescale-title-md);
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letter-spacing: var(--md-sys-typescale-title-md-tracking);
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}
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}
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