.btn {
  max-width: 300px;
  border-radius: 10px;
  margin: 20px auto 30px;
  background: #ffcc33;
  text-align: center;
  padding: 20px;
}
div.btn p {
  padding: 20px auto;
  font-weight: bold;
  font-size: 2em;
}

.red {
  color: #ff0000;
}

.bold {
  font-weight: 900;
}