Anyone who has ever toiled in a continental office will tell you: it’s all about the details. Annual reports are presented in portfolio books from Parisian brand Prat, expenses are logged inside Moleskine notebooks secured with elastic straps, and employees spin around on Rexite swivel chairs whose globular red wheels recall Alexander Calder mobiles. To bring that smart sensibility stateside, Matt Crossin opened PAPERHAUS, a downtown shop where Seattleites find slick supplies that set them far apart from the Kinko’s crowd.