* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo', 'Malgun Gothic',
    sans-serif;
  color: #222;
  background: #fff;
  line-height: 1.7;
}
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}
h1 {
  font-size: 24px;
  margin-bottom: 8px;
}
.meta {
  color: #888;
  font-size: 13px;
  margin-bottom: 32px;
}
h2 {
  font-size: 16px;
  margin: 28px 0 8px;
}
p,
li {
  font-size: 14px;
}
ul {
  padding-left: 20px;
}
a {
  color: #2f8fe8;
}
footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px 40px;
  color: #888;
  font-size: 13px;
}
nav {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 20px 0;
  font-size: 14px;
}
nav a {
  margin-right: 16px;
}