ALIGN PAGE OR SINGLE POST WRAPPER TO MATCH THE HEADER WIDTH
Newman provides couple options on each page or post designed to keep wrapper grid with the header. You’ll find under “Quark Settings” metabox from each post page. Quark Settings provide couple page templates: Sidebar Fixed Right, Sidebar Fixed Left, Sidebar Left, Sidebar Right and Full Width.
Use the Wrapper Max Width option to make the single post grid layout to match the header width: