body{
  background-color: #ffffff;
  color: #1f1f1f;
}
h3{
  text-align: right;
  margin-top: -30px;
}
footer{
  top: 100dvh;
  position: sticky;
}
table{
  border-collapse: collapse;
  font-size: 18px;
}
thead td{
  font-weight: bold;
  text-align: center;
}
th{
  font-weight: bold;
  background-color: #e3e3e3;
}
th,td{
  border: solid 1px;
  padding: 10px;
}
ruby{
  padding: 6px;
}
h4{
  margin: 10px 0;
}

#setting{
  border: 1px solid #1f1f1f;
  padding: 10px;
  margin: 20px 0;
}