Align checkout page (FME one step checkout) Magento

Since migrating to a new template, my fme one step checkout module didn't look right because the site is now responsive. The module was written to be on one page, but now with the new template, I require all the steps to be aligned vertically and to make it look better visually. This should be an easy CSS + PHP fix. No need for color adjustments, just the alignment and to make the boxes uniform. Please see the attached file to see how the layout looks now.