/* ============================================================ * lab-snackbar.css — Axismundi Snackbar Runtime Module * v3.4.10 * * Bucket D — theme interaction runtime, lab module only. * * Relationship to baseline: * components.css §14 Snackbar (L2041-L2160, ~120 lines, 5 rule * blocks) is UNCHANGED at v3.4.10. * * The Phase 0 inventory under-counted baseline rules — its regex * missed indented selectors. The Phase 0 correction is recorded in * docs/SNACKBAR-RUNTIME-AUDIT.md §3. Actual baseline §14 includes: * * .snackbar — container (full visual chrome) * .snackbar--two-line — height variant * .snackbar__label — flex slot (flex: 1 1 auto) * .snackbar__action — full styling INCLUDING state-layer * Pattern A via ::before pseudo * (inverse-primary + label-large + * hover/focus/pressed opacity tokens) * .snackbar__close — 24×24 container + icon size * * The baseline action button uses ::before for its state layer. * This module therefore uses ::after for the close-button hit-area * expansion to avoid colliding with baseline pseudo-element usage. * * Five sections (final, post Phase 0 correction): * §1 Close button hit-area expansion (coarse pointer) * §2 Positioning + safe-area (host wrapper at scope) * §3 Open / leaving runtime states (.is-open / .is-leaving) * §4 Reduced motion * §5 Live region (screen-reader-only utility) * * Module taxonomy: Interaction module (Runtime) * (see lab/modules/README.md §Module taxonomy) * * Audit: modules/snackbar/docs/SNACKBAR-RUNTIME-AUDIT.md * * Hard rules (Phase 1 §5.2) enforced visually: * - The visible snackbar carries no aria-hidden attribute. * (Implemented by lab-snackbar.js — root element creation * never calls setAttribute('aria-hidden').) * - Action / close are real