body {
  background-color: black;
  color: white;
  width: 99%;
  text-align: center;
}
pre {
  max-height: 200pt;
  font-size: 16pt;
  text-align: left;
  color: #ddd;
  background-color: #222;
  overflow-y: scroll;
}
div {
  text-align: center;
}
div.score {
  width: 800px;
  background: red;
  font-size: 20px;
  margin: auto;
  text-align: center;
}
button {
  margin: 5px;
  font-size: 30px;
  width: 200px;
  height: 80px;
  user-select: none;
}