livewire-material/resources/css/layout/scaffold.css

/*
 * <x-scaffold>: M3's scaffold — bars, then rails, then panes (docs/reference/m3/foundations.md
 * § Layout → Scaffold) — as a column: an optional `banner` full width, a row below it holding the
 * adaptive navigation rail and the content region, the bottom navigation bar on a compact window,
 * and the snackbar host. Plan step 36 (navigation group) moves in everything the view drew with
 * Tailwind; `data-md-scaffold-fab` and the content region's `--md-layout-margin` are step 35's,
 * unchanged below.
 *
 * `--material-margin` is M3's window margin, read by a pane and the canonical layouts wherever
 * `--md-layout-margin` has not already zeroed it: 16px below `medium`, 24px from it
 * (docs/reference/m3/foundations-supplement.md § Breakpoints), the same two spacing tokens
 * layout/pane.css reads for its own margin.
 *
 * `[data-md-skip-link]` hides the way `md-visually-hidden` does at rest (text.css) — duplicated
 * here rather than shared, because a class cannot be un-applied on `:focus` — and reveals itself
 * fixed at the window's leading corner, clear of a safe area an application sets, in M3's pill
 * shape and label-large type, with the elevation-3 shadow every temporary surface above the page
 * takes.
 *
 * `[data-md-scaffold-row]` is flex from `medium` only (the width the rail joins the layout at
 * instead of sliding over it as a modal) but always takes the remaining height, whichever it is;
 * `[data-md-scaffold-content]` — the rail's sibling — is always a flex column, so the page's own
 * bar, the FAB wrapper and `<main>` stack regardless of the row's own display.
 *
 * `[data-md-scaffold-actions]`'s column layout is `rail-collapsed:flex-col`, the one Tailwind
 * variant scaffold.blade.php still used (`resources/css/tailwind.css`, removed with this rule):
 * written out branch for branch as the navigation rail's own rewrite did for its internal parts
 * (`resources/css/components/navigation-rail.css`) — the three width-independent conditions in one
 * `:where()` group, the four width-gated ones each in their own `@media` block, since CSS cannot
 * merge different queries. Only the "descendant of a collapsed rail" half of each pair applies:
 * the actions row can never be the rail element itself.
 *
 * `[data-md-scaffold-bar]` pins the navigation bar to the window's bottom edge below `medium`, at
 * the navigation bar's own stacking layer (z-index 30: over the page, under a scrim or the
 * snackbar — navigation-bar.css and toast.css agree on the number). It also carries
 * `--material-bottom-bar`, which everything the bar would otherwise cover reads: the FAB
 * (`[data-md-scaffold-fab]`, below), the snackbar host (toast.css) and the content region's own
 * bottom padding, all through `max()`/`var()` with a `0px` fallback, so nothing below `medium`, or
 * once the bar itself is absent, reads a stale height. It stayed a Tailwind utility
 * (`max-medium:[--material-bottom-bar:…]`, unlayered so it could win over `navigation-bar.css`'s
 * own override) until this rewrite; now both live in `material.components`
 * (`navigation-bar.css`'s own header explains why that layer, not this one, is enough) and this
 * declaration only has to beat `main`'s own `0px` fallback inside the very same layer, which normal
 * cascade order already does. 64px and 80px are `NavigationBarTokens.ContainerHeight` and
 * `TallContainerHeight`, the bar's own dimensions, not the spacing scale — the number
 * navigation-bar.css itself draws the bar at, kept literal here for the same reason.
 *
 * Imports the stylesheets of every component this view renders: the adaptive rail and its item and
 * section, the navigation bar and its item, and the snackbar host.
 *
 * In `material.layout`.
 */

@layer material.reset, material.tokens, material.base, material.layout, material.components, material.text, material.visibility;

@import './visibility.css';
@import '../components/navigation-rail.css';
@import '../components/navigation-rail-item.css';
@import '../components/navigation-rail-section.css';
@import '../components/navigation-bar.css';
@import '../components/navigation-bar-item.css';
@import '../components/toast.css';

@layer material.layout {
    [data-md-scaffold] {
        --material-margin: var(--md-sys-measurement-space200);

        display: flex;
        min-block-size: 100dvh;
        flex-direction: column;
        background-color: var(--md-sys-color-surface);
        color: var(--md-sys-color-on-surface);

        @media (width >= 600px) {
            --material-margin: var(--md-sys-measurement-space300);
        }
    }

    [data-md-skip-link] {
        position: absolute;
        inline-size: 1px;
        block-size: 1px;
        padding: 0;
        margin: -1px;
        overflow: hidden;
        clip-path: inset(50%);
        white-space: nowrap;
        border-width: 0;

        &:focus {
            position: fixed;
            z-index: 60;
            inset-inline-start: var(--md-sys-measurement-space200);
            top: calc(var(--material-safe-top, env(safe-area-inset-top)) + var(--md-sys-measurement-space200));
            inline-size: auto;
            block-size: auto;
            padding: var(--md-sys-measurement-space100) var(--md-sys-measurement-space200);
            margin: 0;
            overflow: visible;
            clip-path: none;
            white-space: normal;
            border-radius: var(--md-sys-shape-corner-full);
            background-color: var(--md-sys-color-inverse-surface);
            color: var(--md-sys-color-inverse-on-surface);
            font: var(--md-sys-typescale-label-lg);
            letter-spacing: var(--md-sys-typescale-label-lg-tracking);
            font-variation-settings: normal;
            box-shadow: var(--md-sys-elevation-3);
            outline: none;
        }
    }

    [data-md-scaffold-banner] {
        flex-shrink: 0;
    }

    [data-md-scaffold-row] {
        flex: 1 1 0%;

        @media (width >= 600px) {
            display: flex;
        }
    }

    [data-md-scaffold-content] {
        display: flex;
        min-inline-size: 0;
        flex: 1 1 0%;
        flex-direction: column;
    }

    [data-md-scaffold-actions] {
        display: flex;
        align-items: center;
        gap: var(--md-sys-measurement-space50);
        padding-block-start: var(--md-sys-measurement-space100);
        padding-inline: 20px;

        &:where(
            [data-md-navigation-rail='collapsed'] *,
            [data-rail='collapsed'] [data-md-navigation-rail='collapsible']:not([data-md-open]) *,
            [data-md-navigation-rail='modal']:not([data-md-open]) *
        ) {
            flex-direction: column;
        }

        @media (width < 600px) {
            &:where([data-md-navigation-rail='collapsible']:not([data-md-open]) *) {
                flex-direction: column;
            }
        }

        @media (width < 840px) {
            &:where([data-md-navigation-rail='adaptive']:not([data-md-open]) *) {
                flex-direction: column;
            }
        }

        @media (width >= 840px) {
            @media (width < 1200px) {
                &:where(:is([data-rail='collapsed'], [data-rail-auto]) [data-md-navigation-rail='adaptive']:not([data-md-open]) *) {
                    flex-direction: column;
                }
            }
        }

        @media (width >= 1200px) {
            &:where([data-rail='collapsed'] [data-md-navigation-rail='adaptive']:not([data-md-open]) *) {
                flex-direction: column;
            }
        }
    }

    [data-md-scaffold] main {
        --md-layout-margin: 0px;

        min-inline-size: 0;
        flex: 1 1 0%;
        padding-inline: var(--material-margin);
        outline: none;

        @media (width < 840px) {
            overflow-x: clip;
        }

        @media (width < 600px) {
            padding-block-end: var(--material-bottom-bar);
        }
    }

    [data-md-scaffold-bar] {
        position: fixed;
        z-index: 30;
        inset-inline: 0;
        inset-block-end: 0;

        @media (width >= 600px) {
            display: none;
        }
    }

    [data-md-scaffold]:has(> [data-md-scaffold-bar] [data-md-navigation-bar]:not([data-md-tall])) {
        @media (width < 600px) {
            --material-bottom-bar: calc(64px + var(--material-safe-bottom, env(safe-area-inset-bottom)) + var(--material-bottom-extra, 0px));
        }
    }

    [data-md-scaffold]:has(> [data-md-scaffold-bar] [data-md-navigation-bar][data-md-tall]) {
        @media (width < 600px) {
            --material-bottom-bar: calc(80px + var(--material-safe-bottom, env(safe-area-inset-bottom)) + var(--material-bottom-extra, 0px));
        }
    }

    [data-md-scaffold-fab] {
        --md-scaffold-fab-margin: var(--md-sys-measurement-space200);

        position: fixed;
        z-index: 30;
        inset-inline-end: max(
            var(--md-scaffold-fab-margin),
            var(--material-safe-right, env(safe-area-inset-right))
        );
        inset-block-end: calc(
            max(var(--material-bottom-bar, 0px), var(--material-safe-bottom, env(safe-area-inset-bottom)))
            + var(--md-scaffold-fab-margin)
            + var(--material-snackbar-height, 0px)
            + min(var(--material-snackbar-height, 0px), var(--md-sys-measurement-space200))
        );
        transition: inset-block-end var(--md-sys-motion-spatial-default-duration) var(--md-sys-motion-spatial-default);

        @media (width >= 600px) {
            --md-scaffold-fab-margin: var(--md-sys-measurement-space300);
        }
    }

    [data-md-scaffold-fab]:dir(rtl) {
        inset-inline-end: max(
            var(--md-scaffold-fab-margin),
            var(--material-safe-left, env(safe-area-inset-left))
        );
    }
}