body{
  font-family: 'Noto Sans JP', sans-serif;
  background:#f0f8ff;
  text-align:center;
}
  #clickBtn{
    padding:12px 24px;
    font-size:1.1rem;
    border:none;
    border-radius:8px;
    cursor:pointer;
    transition:all .2s;
  }
  #clickBtn:hover{
    background:#ffcc00;
  }