How to alter product media style in Dawn theme?

[Ahsan0213]

Hi,

I am looking to change the appearance of how the product media looks on my store. 

1) How can I remove the padding between the header and the product media so that there is no white space in between? I only want this done on mobile and not desktop devices. (picture of current site shown below)

2) How can I change the pagination style to match the 'Dots' style on the themes slideshow section? (shown below)

Thank you for your help.