How can I center and enlarge the first product picture on mobile view?

[MIKESTORK]

Hi,

im using the prestige theme

im looking to center the mobile product pic

so it fill the whole first screen

my site is https://b32b39-5.myshopify.com/products/copy-of-logo-large-double-pocket-backpack-sahara-rubino-bordeaux?_pos=2&_sid=cc5dce343&_ss=r