////
///
/// Interface Layer
/// ===========================================================================
///
/// Fixed, full-viewport, pointer-events-transparent overlay that sits
/// above content. Used to host floating UI affordances (back-to-top
/// arrows, persistent action buttons, toasts) without intercepting
/// clicks on the page itself.
///
/// Children opt back into pointer events via `.ss-l-interface > *`
/// styling or component-local rules.
///
/// Ported from legacy `bup/mixins/body_organisms/_interface.scss`.
///
/// @group Layout
/// @author Scape Press
/// @link https://scape.style
/// @since 0.4.0
/// @access public
///
////

@layer ss.layout {
    .ss-l-interface {
        position: fixed;
        inset: 0;
        width: 100%;
        height: 100%;
        background-color: transparent;
        overflow: hidden;
        pointer-events: none;
        z-index: var(--ss-z-interface, 200);
    }

    // Header strip inside the interface overlay.
    .ss-l-interface__header {
        display: flex;
        flex-direction: row;
    }

    // Children of the interface should accept pointer events explicitly.
    .ss-l-interface > [data-pointer-events="auto"] {
        pointer-events: auto;
    }
}