html,
body {
  margin: 0;
  padding: 0 !important;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background: black;
  font-family: "Consolas", "Courier New", Courier, monospace;
}

header {
    margin-bottom: 1rem;
}

a {
  text-decoration: none;
  color: cyan;
}

a:hover {
  color: magenta;
}

ul,
li {
  margin: 0;
  padding: 0;
  list-style: none;
  display: block;
}

nav {
  background: white;
}

nav li {
  display: inline-block;
}
nav a {
  display: inline-block;
  line-height: 50px;
  padding: 0 20px;
  text-decoration: none;
  color: black;
}

section {
  color: white;
  width: 800px;
  margin: 0 auto;
}