body {
  text-align: center;
  font-family: sans-serif;
  background: #ffffff;
  margin: 0;
  padding: 0;
}

#questionBox {
  margin-top: 40px;
}

#questionHira {
  font-size: 40px;
  margin: 0;
}

#questionRoma {
  font-size: 40px;
  margin-top: 0px;
  margin-bottom: 20px;
  height: 60px;
  line-height: 60px;
  display: block;
}

#keyboardBox {
  margin-top: 5px;  /* 40px → 5px に変更 */
  display: inline-block;
  background: #ffffff;
  border: 2px solid #ccc;
  border-radius: 12px;
  padding: 10px 10px;
}