body {
  margin: 0;
  background: #000;
  color: #ccc;
  font-family: "Courier New", monospace;
  font-size: 15px;
  line-height: 1.7;
}

.screen {
  max-width: 480px;
  margin: 0 auto;
  padding: 24px 18px;
}

h1, h2 {
  font-size: 20px;
  font-weight: normal;
  color: #eee;
}

.subtitle {
  color: #999;
}

input, select, button {
  width: 100%;
  box-sizing: border-box;
  margin: 8px 0 14px;
  padding: 10px;
  background: #000;
  color: #ccc;
  border: 1px solid #555;
  font-family: "Courier New", monospace;
}

button {
  cursor: pointer;
}

a {
  color: #7aa2ff;
  text-decoration: underline;
}

a:visited {
  color: #b58cff;
}

.hidden {
  display: none;
}