.ranking_name {
  font-size: 20px;
}

.group_ranking_table{
  width: 60%;
  margin-left: auto;
  margin-right: auto;
}

.personal_ranking_table{
  width: 100%;
}

.personal_ranking_table tbody tr td{
  width: 20%;
}

.group_ranking_table tbody tr td{
  width: 20%;
}