#answer {
  width: 100%;
  height: 54px;
  line-height: 54px;
  text-align: center;
  vertical-align: middle;
  background-color: #001f3f;
  font-family: monospace,monospace;
  font-size: 2em;
  color: hsla(210, 100%, 75%, 1.0);
}

button {
    display: block;
    width: 90%;
    padding: 4px;
    margin: 5%;
    background-color: #39CCCC;
    border: none;
    height: 44px;
    font-weight: bold;
    font-size: 1rem;
}

input {
    width: 40%;
    margin: 4%;
    height: 40px;
    line-height: 40px;
    font-size: 1.6em;
    cursor: pointer;
    text-align: center;
    border-radius: 4px;
}