message: introduce max width
diff: @@ -24,7 +24,8 @@ const Wrapper = styled.div`
  transition: 1s all;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  grid-column-gap: 40px;
  - margin-top: 20px;
  + max-width: 1440px;
  + margin: 20px auto 0;
  `
  const DemoForm = styled.form`
  