In Hype any object must be centered with relative position to the parent element.
I created a group with the bigger "Widget - interactive grid" and the green box.
The new group should be centered or adapt to the width of the layout
The groppo is
liquidLayout-2.hype.zip (371.8 KB)
BTW: you can also use a single object in a group (with the same width of the layout ). Just to add an absolute position (centered) with your element inside.