Andreas Reinhold / reiniandClaude Opus 5
7803298fe7
Plan step 36 ("Interaction is the shared classes", the user, 2026-09-14).
A segment's hover and press opacities were group.css's own copy of
md-state-layer's declarations; the label now renders md-state-layer
(and, below medium's two smallest sizes, md-touch-target) and the
stylesheet keeps only what the class cannot draw: focus and disabled read
off the real radio or checkbox inside with :has(), not the label itself,
so the focus ring's layer tint and the disabled hide are kept as a
refinement (the latter a real gap the old rule left open). button-group.css,
which only shapes corners and spacing, needed no change.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9
224 lines
8.9 KiB
CSS
224 lines
8.9 KiB
CSS
/*
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* <x-group>: a choice of a few options drawn as M3 Expressive's connected button group, the
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* successor of the segmented button — native radios (checkboxes with `data-md-multiple`) under
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* segments that share the row, or hug their labels with `data-md-inline`.
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*
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* The segments are M3's buttons at the group's `data-md-size` (Button*Tokens: 32/40/56/96/136px
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* tall, 16/16/24/48/64px either side, 8/8/8/12/16px between icon and label, label-large, label-
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* large, title-medium, headline-small, headline-large), with the connected shape from
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* button-group.css: 2px apart, small inner corners, the chosen segment fully round. At `xs` and
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* `sm` a segment carries M3's 48px target and a 48px minimum width, which M3 asks for by name.
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*
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* `data-md-variant` is the toggle button's colours: `tonal` (secondary-container, chosen in
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* secondary), `filled` (surface-container behind on-surface-variant, chosen in primary) or
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* `outlined` (an outline-variant edge, chosen in inverse-surface). A checked input picks the
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* chosen colours (`:has(:checked)`), a disabled one the disabled treatment — on-surface at 10%
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* behind 38% text. Corners move on the fast spatial spring and colours on the fast effects spring
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* beside it.
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*
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* A segment renders the foundation's `md-state-layer` (foundation/interaction.css) on the label
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* itself, which reaches the same `:hover`/`:active` as the class expects; below `medium`'s smallest
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* two sizes it renders `md-touch-target` too. The real control is the `<input>` inside, not the
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* label, so keyboard focus and the disabled state are read off it with `:has()` — the one
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* difference the class cannot draw, kept here as a refinement.
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*
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* The legend is label-large and the hint body-small, both in on-surface-variant; a validation
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* message takes the hint's place in error. `hint-class` lands on the hint, where a caller's class
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* outranks the colour here.
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*/
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@layer material.reset, material.tokens, material.base, material.layout, material.components, material.text, material.visibility;
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@import './icon.css';
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@import './button-group.css';
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@layer material.components {
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[data-md-group] {
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min-inline-size: 0;
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}
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[data-md-group-legend] {
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margin-block-end: var(--md-sys-measurement-space100);
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color: var(--md-sys-color-on-surface-variant);
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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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font-variation-settings: normal;
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}
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[data-md-group] > [data-md-button-group] {
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display: flex;
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align-items: normal;
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inline-size: 100%;
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}
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[data-md-group][data-md-inline] > [data-md-button-group] {
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inline-size: fit-content;
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}
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[data-md-group-segment] {
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--md-group-container: var(--md-sys-color-secondary-container);
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--md-group-label: var(--md-sys-color-on-secondary-container);
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display: flex;
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flex: 1 1 0%;
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align-items: center;
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justify-content: center;
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min-inline-size: 0;
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background-color: var(--md-group-container);
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color: var(--md-group-label);
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white-space: nowrap;
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cursor: pointer;
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-webkit-user-select: none;
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user-select: none;
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transition-property: border-radius, padding, margin, bottom, background-color, color, box-shadow;
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transition-duration:
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var(--md-sys-motion-spatial-fast-duration), var(--md-sys-motion-spatial-fast-duration),
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var(--md-sys-motion-spatial-fast-duration), var(--md-sys-motion-spatial-fast-duration),
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var(--md-sys-motion-effects-fast-duration), var(--md-sys-motion-effects-fast-duration), var(--md-sys-motion-effects-fast-duration);
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transition-timing-function:
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var(--md-sys-motion-spatial-fast), var(--md-sys-motion-spatial-fast),
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var(--md-sys-motion-spatial-fast), var(--md-sys-motion-spatial-fast),
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var(--md-sys-motion-effects-fast), var(--md-sys-motion-effects-fast), var(--md-sys-motion-effects-fast);
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/* Focus lands on the input inside, not the label, so it is read with :has(); the state
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layer's own opacity joins the ring, as the foundation class draws for a focused control. */
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&:has(:focus-visible) {
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outline: 3px solid var(--md-sys-color-secondary);
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outline-offset: 2px;
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&::before {
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opacity: var(--md-sys-state-focus-state-layer-opacity);
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}
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}
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/* Disabled is read off the input too: the class's own :disabled/aria-disabled rule never
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fires on the label it never reaches. */
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&:has(:disabled)::before {
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display: none;
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}
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/* The radio or checkbox stays in the page, for the form, the keyboard and a screen reader. */
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& > input {
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position: absolute;
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width: 1px;
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height: 1px;
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padding: 0;
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margin: -1px;
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overflow: hidden;
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clip-path: inset(50%);
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white-space: nowrap;
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border-width: 0;
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}
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}
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[data-md-group][data-md-inline] [data-md-group-segment] {
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flex: initial;
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}
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[data-md-group]:is([data-md-size='xs'], [data-md-size='sm']) [data-md-group-segment] {
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min-inline-size: var(--md-sys-measurement-space600);
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}
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[data-md-group][data-md-size='xs'] [data-md-group-segment] {
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gap: var(--md-sys-measurement-space100);
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block-size: 32px;
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padding-inline: var(--md-sys-measurement-space200);
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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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font-variation-settings: normal;
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}
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[data-md-group][data-md-size='sm'] [data-md-group-segment] {
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gap: var(--md-sys-measurement-space100);
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block-size: 40px;
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padding-inline: var(--md-sys-measurement-space200);
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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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font-variation-settings: normal;
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}
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[data-md-group][data-md-size='md'] [data-md-group-segment] {
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gap: var(--md-sys-measurement-space100);
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block-size: 56px;
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padding-inline: var(--md-sys-measurement-space300);
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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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font-variation-settings: normal;
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}
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[data-md-group][data-md-size='lg'] [data-md-group-segment] {
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gap: 12px;
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block-size: 96px;
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padding-inline: var(--md-sys-measurement-space600);
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font: var(--md-sys-typescale-headline-sm);
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letter-spacing: var(--md-sys-typescale-headline-sm-tracking);
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font-variation-settings: normal;
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}
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[data-md-group][data-md-size='xl'] [data-md-group-segment] {
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gap: var(--md-sys-measurement-space200);
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block-size: 136px;
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padding-inline: var(--md-sys-measurement-space800);
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font: var(--md-sys-typescale-headline-lg);
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letter-spacing: var(--md-sys-typescale-headline-lg-tracking);
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font-variation-settings: normal;
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}
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[data-md-group-segment]:has(:checked) {
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--md-group-container: var(--md-sys-color-secondary);
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--md-group-label: var(--md-sys-color-on-secondary);
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}
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[data-md-group][data-md-variant='filled'] [data-md-group-segment] {
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--md-group-container: var(--md-sys-color-surface-container);
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--md-group-label: var(--md-sys-color-on-surface-variant);
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&:has(:checked) {
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--md-group-container: var(--md-sys-color-primary);
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--md-group-label: var(--md-sys-color-on-primary);
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}
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}
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[data-md-group][data-md-variant='outlined'] [data-md-group-segment] {
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--md-group-container: transparent;
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--md-group-label: var(--md-sys-color-on-surface-variant);
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border: 1px solid var(--md-sys-color-outline-variant);
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&:has(:checked) {
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--md-group-container: var(--md-sys-color-inverse-surface);
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--md-group-label: var(--md-sys-color-inverse-on-surface);
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border-color: transparent;
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}
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}
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[data-md-group-segment]:has(:disabled) {
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background-color: color-mix(in srgb, var(--md-sys-color-on-surface) 10%, transparent);
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color: color-mix(in srgb, var(--md-sys-color-on-surface) calc(var(--md-sys-state-disabled-content-opacity) * 100%), transparent);
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cursor: not-allowed;
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}
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[data-md-group-label] {
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overflow: hidden;
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text-overflow: ellipsis;
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white-space: nowrap;
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}
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[data-md-group-hint],
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[data-md-group-error] {
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margin-block-start: var(--md-sys-measurement-space50);
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font: var(--md-sys-typescale-body-sm);
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letter-spacing: var(--md-sys-typescale-body-sm-tracking);
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font-variation-settings: normal;
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}
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[data-md-group-hint] {
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color: var(--md-sys-color-on-surface-variant);
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}
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[data-md-group-error] {
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color: var(--md-sys-color-error);
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}
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}
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