Every field is anchored below the previous one (data-⚓️-below, 8pt standard spacing), with
equal widths via data-⚓️-sync-width. The primary button hangs off a simulated
keyboardLayoutGuide with data-⚓️-side="above", so it rides the keyboard up.
Wide screens switch to the regular size class: two columns, --⚓️-mult-x: 0.5, hardware keyboard.