h1, h2, h3, h4, h5, h6 {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizelegibility;
  font-weight: normal; }

body {
  font-family: "Helvetica Nenu", Helvetica, Arial, "Hiragino Sans GB", STHeiti, "Microsoft YaHei", "Wenquanyi Micro Hei", sans-serif; }

main {
  margin: 8rem 10em; }

.output {
  background: #e8e8e8;
  padding: 1em 2em;
  border-radius: 6px;
  margin-top: 2em; }