/*
 * M3's selection controls: the checkbox, the radio button and the switch (CheckboxTokens,
 * RadioButtonTokens, SwitchTokens, androidx Compose Material 3, Apache-2.0).
 *
 * Each is a real `<input>` with its appearance removed and drawn over, so focus, the keyboard
 * (Space; the arrow keys between radios), the form value, `wire:model` and what a screen reader
 * announces stay the browser's. The row around it is a `<label>`, so its text is pressable too.
 * Hooks are data attributes, not class names: `checkbox`, `radio` and `toggle` are daisyUI's, which
 * the design guard rejects.
 *
 *   [data-selection]            the <label> row; `data-invalid` when the server has an error for it
 *     [data-checkbox]           the 18px box, its state layer a 40px circle around it
 *       input, [data-check], [data-mixed]
 *     [data-radio]              the 20px ring and its 10px dot
 *       input, [data-dot]
 *     [data-switch]             the 52×32 track; `data-icons` = "both" or "selected"
 *       input, [data-handle] (with [data-on] and [data-off] icons)
 *
 * Every state layer is on-surface when unselected and primary when selected, 8% on hover (only
 * where a pointer can hover) and 10% on focus and press; the focus indicator is the package's
 * secondary ring. A disabled control is on-surface at 38% and has no state layer.
 *
 * The state layer is a ::before with no pointer events, so it is not a target: a labelled control
 * is pressed anywhere along its row, and a control with no label wears the `touch-target` utility
 * (resources/css/tokens/state.css) so its box catches presses over M3's 48px minimum.
 */

@layer components {
    [data-selection] {
        cursor: pointer;
        -webkit-tap-highlight-color: transparent;
    }

    [data-selection]:has(input:disabled) {
        cursor: default;
    }

    [data-selection]:has(input:disabled) [data-selection-label] {
        color: color-mix(in srgb, var(--md-sys-color-on-surface) 38%, transparent);
    }

    [data-checkbox],
    [data-radio] {
        position: relative;
        display: grid;
        flex: none;
        place-items: center;
    }

    [data-checkbox] > *,
    [data-radio] > * {
        grid-area: 1 / 1;
    }

    [data-checkbox]::before,
    [data-radio]::before,
    [data-handle]::before {
        content: "";
        position: absolute;
        border-radius: var(--md-sys-shape-corner-full);
        pointer-events: none;
        transition: background-color var(--md-sys-motion-effects-fast-duration) var(--md-sys-motion-effects-fast);
    }

    [data-checkbox] input,
    [data-radio] input,
    [data-switch] input {
        margin: 0;
        appearance: none;
        cursor: inherit;
        outline: none;
        transition-property: background-color, border-color;
        transition-duration: var(--md-sys-motion-effects-fast-duration);
        transition-timing-function: var(--md-sys-motion-effects-fast);
    }

    /* The state layer. `--selection-ink` is what it is tinted with. */
    [data-selection] {
        --selection-ink: var(--md-sys-color-on-surface);
    }

    [data-selection]:has(input:checked),
    [data-selection]:has(input:indeterminate) {
        --selection-ink: var(--md-sys-color-primary);
    }

    [data-selection][data-invalid] {
        --selection-ink: var(--md-sys-color-error);
    }

    @media (hover: hover) {
        [data-selection]:hover:not(:has(input:disabled)) :is([data-checkbox], [data-radio], [data-handle])::before {
            background-color: color-mix(in srgb, var(--selection-ink) 8%, transparent);
        }
    }

    [data-selection]:has(input:focus-visible) :is([data-checkbox], [data-radio], [data-handle])::before,
    [data-selection]:not(:has(input:disabled)):active :is([data-checkbox], [data-radio], [data-handle])::before {
        background-color: color-mix(in srgb, var(--selection-ink) 10%, transparent);
    }

    [data-checkbox]:has(input:focus-visible)::before,
    [data-radio]:has(input:focus-visible)::before {
        outline: 3px solid var(--md-sys-color-secondary);
    }

    /* ---- Checkbox ---------------------------------------------------------------------------- */

    [data-checkbox] {
        width: 1.125rem;
        height: 1.125rem;
    }

    [data-checkbox]::before {
        inset: -0.6875rem;
    }

    [data-checkbox] input {
        width: 1.125rem;
        height: 1.125rem;
        border: 2px solid var(--md-sys-color-on-surface-variant);
        border-radius: 2px;
    }

    [data-checkbox] input:is(:checked, :indeterminate) {
        border-color: var(--md-sys-color-primary);
        background-color: var(--md-sys-color-primary);
    }

    [data-checkbox] :is([data-check], [data-mixed]) {
        color: var(--md-sys-color-on-primary);
        opacity: 0;
        scale: 0.5;
        pointer-events: none;
        transition-property: opacity, scale;
        transition-duration: var(--md-sys-motion-spatial-fast-duration);
        transition-timing-function: var(--md-sys-motion-spatial-fast);
    }

    [data-checkbox] input:checked:not(:indeterminate) ~ [data-check],
    [data-checkbox] input:indeterminate ~ [data-mixed] {
        opacity: 1;
        scale: 1;
    }

    [data-selection][data-invalid] [data-checkbox] input {
        border-color: var(--md-sys-color-error);
    }

    [data-selection][data-invalid] [data-checkbox] input:is(:checked, :indeterminate) {
        background-color: var(--md-sys-color-error);
    }

    [data-selection][data-invalid] [data-checkbox] :is([data-check], [data-mixed]) {
        color: var(--md-sys-color-on-error);
    }

    [data-checkbox] input:disabled {
        border-color: color-mix(in srgb, var(--md-sys-color-on-surface) 38%, transparent);
    }

    [data-checkbox] input:disabled:is(:checked, :indeterminate) {
        border-color: transparent;
        background-color: color-mix(in srgb, var(--md-sys-color-on-surface) 38%, transparent);
    }

    [data-checkbox] input:disabled ~ :is([data-check], [data-mixed]) {
        color: var(--md-sys-color-surface);
    }

    /* ---- Radio button ------------------------------------------------------------------------ */

    [data-radio] {
        width: 1.25rem;
        height: 1.25rem;
    }

    [data-radio]::before {
        inset: -0.625rem;
    }

    [data-radio] input {
        width: 1.25rem;
        height: 1.25rem;
        border: 2px solid var(--md-sys-color-on-surface-variant);
        border-radius: var(--md-sys-shape-corner-full);
    }

    [data-radio] [data-dot] {
        width: 0.625rem;
        height: 0.625rem;
        border-radius: var(--md-sys-shape-corner-full);
        background-color: var(--md-sys-color-primary);
        scale: 0;
        pointer-events: none;
        transition: scale var(--md-sys-motion-spatial-fast-duration) var(--md-sys-motion-spatial-fast);
    }

    [data-radio] input:checked {
        border-color: var(--md-sys-color-primary);
    }

    [data-radio] input:checked ~ [data-dot] {
        scale: 1;
    }

    [data-selection][data-invalid] [data-radio] input {
        border-color: var(--md-sys-color-error);
    }

    [data-selection][data-invalid] [data-radio] [data-dot] {
        background-color: var(--md-sys-color-error);
    }

    [data-radio] input:disabled {
        border-color: color-mix(in srgb, var(--md-sys-color-on-surface) 38%, transparent);
    }

    [data-radio] input:disabled ~ [data-dot] {
        background-color: color-mix(in srgb, var(--md-sys-color-on-surface) 38%, transparent);
    }

    /* ---- Switch -------------------------------------------------------------------------------
     *
     * The handle's centre is 16px from the track's start unselected and 36px selected; it is 16px
     * across unselected, 24px with an icon or selected, and 28px while pressed. The positions below
     * are those centres less half the size, measured inside the track's 2px outline. */

    [data-switch] {
        position: relative;
        display: grid;
        flex: none;
        width: 3.25rem;
        height: 2rem;
    }

    [data-switch] input {
        width: 100%;
        height: 100%;
        border: 2px solid var(--md-sys-color-outline);
        border-radius: var(--md-sys-shape-corner-full);
        background-color: var(--md-sys-color-surface-container-highest);
    }

    [data-switch] input:focus-visible {
        outline: 3px solid var(--md-sys-color-secondary);
        outline-offset: 2px;
    }

    [data-handle] {
        --handle: 1rem;

        position: absolute;
        top: 50%;
        inset-inline-start: calc(1rem - var(--handle) / 2);
        display: grid;
        place-items: center;
        width: var(--handle);
        height: var(--handle);
        translate: 0 -50%;
        border-radius: var(--md-sys-shape-corner-full);
        background-color: var(--md-sys-color-outline);
        color: var(--md-sys-color-surface-container-highest);
        pointer-events: none;
        transition-property: inset-inline-start, width, height, background-color;
        transition-duration: var(--md-sys-motion-spatial-fast-duration);
        transition-timing-function: var(--md-sys-motion-spatial-fast);
    }

    [data-handle]::before {
        inset: 50% auto auto 50%;
        width: 2.5rem;
        height: 2.5rem;
        translate: -50% -50%;
    }

    [data-handle] > svg {
        grid-area: 1 / 1;
        opacity: 0;
        transition: opacity var(--md-sys-motion-effects-fast-duration) var(--md-sys-motion-effects-fast);
    }

    [data-switch][data-icons="both"] [data-handle] {
        --handle: 1.5rem;
    }

    [data-switch][data-icons="both"] input:not(:checked) ~ [data-handle] [data-off],
    [data-switch][data-icons] input:checked ~ [data-handle] [data-on] {
        opacity: 1;
    }

    [data-switch] input:checked {
        border-color: var(--md-sys-color-primary);
        background-color: var(--md-sys-color-primary);
    }

    [data-switch] input:checked ~ [data-handle] {
        --handle: 1.5rem;

        inset-inline-start: calc(2.25rem - var(--handle) / 2);
        background-color: var(--md-sys-color-on-primary);
        color: var(--md-sys-color-on-primary-container);
    }

    [data-selection]:active [data-switch] input:not(:disabled) ~ [data-handle] {
        --handle: 1.75rem;
    }

    @media (hover: hover) {
        [data-selection]:hover [data-switch] input:not(:disabled) ~ [data-handle] {
            background-color: var(--md-sys-color-on-surface-variant);
        }

        [data-selection]:hover [data-switch] input:checked:not(:disabled) ~ [data-handle] {
            background-color: var(--md-sys-color-primary-container);
        }
    }

    [data-switch] input:focus-visible ~ [data-handle],
    [data-selection]:active [data-switch] input:not(:disabled) ~ [data-handle] {
        background-color: var(--md-sys-color-on-surface-variant);
    }

    [data-switch] input:checked:focus-visible ~ [data-handle],
    [data-selection]:active [data-switch] input:checked:not(:disabled) ~ [data-handle] {
        background-color: var(--md-sys-color-primary-container);
    }

    [data-switch] input:disabled {
        border-color: color-mix(in srgb, var(--md-sys-color-on-surface) 12%, transparent);
        background-color: color-mix(in srgb, var(--md-sys-color-surface-container-highest) 12%, transparent);
    }

    [data-switch] input:disabled ~ [data-handle] {
        background-color: color-mix(in srgb, var(--md-sys-color-on-surface) 38%, transparent);
        color: color-mix(in srgb, var(--md-sys-color-surface-container-highest) 38%, transparent);
    }

    [data-switch] input:disabled:checked {
        border-color: transparent;
        background-color: color-mix(in srgb, var(--md-sys-color-on-surface) 12%, transparent);
    }

    [data-switch] input:disabled:checked ~ [data-handle] {
        background-color: var(--md-sys-color-surface);
        color: color-mix(in srgb, var(--md-sys-color-on-surface) 38%, transparent);
    }
}