Match Project Pages to Full Width Home Page in Lange

Site URL: http://www.billydupee.co.uk

Hi there, I have pretty much perfected my site's homepage using the Lange template and the page showcases my projects full width which is great. However, when I click into the projects my content is then reduced in size and has padding on each side. This happens on all my subseuent pages of my site. I want all pages on my site to be full width just like my homepage. Is this an option only available in Premium or can I change this using my current package? If so, how can I do this?

PS: See screen shots attached.

Thanks so much

Add to Home > Design > Custom CSS

.collection-type-page main#page {
    max-width: 100%;
}