* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: sans-serif;
  background: #fff;
  color: #111;
}

header {
  padding: 2rem;
  border-bottom: 1px solid #eee;
}

main {
  padding: 4rem 2rem;
}