[Theme: Arcade] Mobile theme posts display – incorrect

Hi there,

Almost all the items are formatting correctly on the mobile version of our site, (i.e. the menus, the footer) except the consistent problem with the text of our posts — it is aligning to the far right of the mobile viewer, almost entirely out of the frame.

Here is our website:

https://www.phantomlimbpress.com

I’ve tried: 1) realigning the posts to the left in the html, 2) using jetpack’s mobile version (no help), 3) using a mobile plugin – WPTouch (also didn’t work)

I think it might be a CSS issue but I am not sure precisely what code to change / shift around? Thank you so much for any help!