{{ 'datetime-widget.css' | asset_url | stylesheet_tag }} {% comment %} Cross-theme cart placement (PRODUCT_STRATEGY.md competitive parity item): a manually-placed app BLOCK only ever lands wherever the active theme's own section schema declares an `@app` slot — many themes don't expose one next to the cart's Checkout button at all, only "Add section" at the top level, which is what was showing up as a disconnected block. Shopify gives apps no supported way to inject a block into an arbitrary spot in a theme's own section markup, so this app embed (always loaded site-wide, independent of any block placement) instead emits an inert