html {
  height: 100%;
  background-color: black;
}
  
h1 {
  color: #ffffff;
  text-align: center;
  font-family: monospace;
}
  
p {
  font-family: monospace;
  font-size: 20px;
  color: #ffffff;
}

button {
  font-family: monospace;
  font-size: 20px;
  color: #ffffff;
  background-color: black;
  border: 2px solid white;
}

a {
  font-family: monospace;
  font-size: 20px;
  color: #ffffff;
  text-align: center;
  display: block;
}

header {
  background-color: black;
  border: 2px solid white;
  padding: 1%;
  display: block;
}

ul {
  color: white;
  font-family: monospace;
  font-size: 20px
}