Need help with Peoplesoft fluid application development

I would need help with the following page controls as they aren't working as expected even after folowing the steps properly as per Oracle documentation.

1) Fluid grid appears vertical in both PC and mobile mode. I would need that to be vertical in only mobile mode.

2)How to increase field spacing between the field and field label. I want to move all the fieldsaway from the label and place them along a vertical line like shown in the secnd image below. I have tried using padding and margin style classes but that doesn't work. (spacing.jpeg)

3)The long edit box appears very small in size. I have already used the style class psc_control‐fullwidth for this field(longedit.jpg)