The complex, pastel palette of Czech artist Alphonse Mucha’s work heralded a novel moment in art history. In works notable for their youthful energy and simplified draftsmanship, “le style Mucha” helped emancipate the creative spirit of the 19th-century Art Nouveau movement. Paperblanks Mucha Autumn Maiden journal reproduces a panel from Mucha’s four-part 1897 series, “The Seasons.”