Material Design Specification http://www.google.com/design/spec/material-design ✓ Material Design Overview http://static.googleusercontent.com/media/www.google.com/en//design/material-design.pdf
a key role in material design’s development: it is used to quickly prototype and iterate on design concepts. Polymer Material Design ͷϓϩτλΠϓͱͯ͠ ར༻͞Ε͍ͯͯɺͦͷσβΠϯίϯηϓτ͕ ܁Γฦ͠ద༻͞Ε͍ͯΔ http://www.polymer-project.org/resources/faq.html