* {
  box-sizing: border-box;
}
html {
  padding: 2px;
}
body {
  max-width: 600px;
  margin: auto;
  min-height: 100vh;
  padding-bottom: 5em;
  position: relative;
}
footer {
  height: 5em;
  position: absolute;
  bottom: 0;
}
footer a {
  display: inline-block;
  margin-right: 1em;
}
h1 a {
  color: black;
}
li {
  margin-bottom: 0.6em;
}