body {
    background-color: #111;
    color: #fff;
  }

.remaining-life-page {
    align-content: center;
}

.remaining-life-page .result {
    font-size: 1.5rem;
    color: #00ff99;
    margin-top: 20px;
  }

  #nameInput {
    width: 50%;
    display: block;
    margin: 0 auto;
}