After earning her doctorate at the Oslo School of Architecture and Design and working in Norway’s capital as a teacher and research fellow, architect Nina Edwards Anker came home to the U.S. with a refreshed perspective on environmental sensitivity. When the opportunity arose to build an eco-cottage on family land in Southampton, Long Island, Edwards Anker’s thought experiments resulted in a 1,738-square-foot vacation home completed in 2017, made striking for the combination of curved, shingle-clad walls that meet planes of glass, with some cast in bright, unexpected color.