mara's follow-up: both cards should be the same size (flex: 1 1 0
instead of the form keeping its own narrower basis), and the form's
inputs should fill the card rather than stopping at their old 16em
cap. Dropped that cap from the shared form kit (.ui-form-control /
.ui-form-field) entirely rather than overriding it per-page — the kit
itself has no width opinion now, same as Panel already has none; a
page that wants a narrower field caps its layout, not the kit.
Checked ComponentsPage's standalone samples (no regression, just
wider) and narrow-viewport stacking (still moves the explanation
under the form).
3b339b2232