Spacing and typo size on mobile / Debut theme

Store Design
1

Hey,

  1. I would like to know how can I add a space on mobile between the product tabs and the related products, and also add a space between the related products and the instagram feed ?

  2. I would like to know how can I increase on mobile the typo of the ‘‘you may also like’’ of the related products and also the ‘‘tag your post …’’ of the instagram feed ?

  3. I would like to know how can I reduce on mobile the typo of the ‘‘tag your post …’’ of the instagram feed on the home page ?

Thanks.

Link : https://relentless-clothingz.myshopify.com

Password : cohghozo