.table_a th,
.table_a td {
  border: 1px solid #ccc;
  padding: 10px 5px;
  text-align: center;
  font-weight: 400;
}
.table_a th {
  font-weight: 700;
  width: 50px;
  padding: 0 20px;
  position: relative;
  height: 120px;
}
.table_a th span {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  white-space: nowrap;
}
.table_a th small {
  font-weight: 700;
  font-size: 16px;
  cursor: vertical-text;
  direction: rtl;
  writing-mode: vertical-rl;
  -o-writing-mode: vertical-rl;
  -ms-writing-mode: vertical-rl;
  -ms-writing-mode: tb-rl;
  -moz-writing-mode: vertical-rl;
  -webkit-writing-mode: vertical-rl;
  text-orientation: sideways-right;
  -o-text-orientation: sideways-right;
  -ms-text-orientation: upright;
  -ms-text-orientation: sideways-right;
  -moz-text-orientation: sideways-right;
  -webkit-text-orientation: sideways-right;
}
.table_a th span {
  cursor: vertical-text;
  writing-mode: vertical-rl;
  -o-writing-mode: vertical-rl;
  -ms-writing-mode: vertical-rl;
  -ms-writing-mode: tb-rl;
  -moz-writing-mode: vertical-rl;
  -webkit-writing-mode: vertical-rl;
  text-orientation: upright;
  word-wrap: break-word;
}

.table_a thead td {
  font-weight: 700;
}
.table_a tbody tr:nth-child(-n + 2) td {
  text-align: left;
}