Change button and text color since update

Hi,

After the update some things changed. It seems like things reverted back.
I have Hikashop Bus. Newest update.

1. How do I change the color of the buttons and the button text?

2. How can I make price on product info page larger?

3. How can I center product title, change color and make larger?

4. How can I reduce the space between product info page image and the description area. Seems very massive space.

Thanks,
Charles