html,
body {
  margin: 0;
  padding: 0;
  display: grid;
  place-items: center;
  height: 100vh;
  font-family: 'Bitter', serif;
}

.box {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

.code {
  font-size: 40px;
}

.sub {
  text-align: center;
}

.sub h2 {
  font-size: 26px;
}

.sub h3 {
  font-size: 20px;
}

.red {
  color: #f44336;
}

.orange {
  color: #FF5722;
}

.green {
  color: #4CAF50;
}

.blue {
  color: #2196F3;
}

.violet {
  color: #9C27B0;
}

.grey {
  color: #546E7A;
}