#gathering_table {
  border-width: 1px;
  border-style: ridge;
  border-color: black;
  background-color: gray;
}

.gathering_time_fmt {
  text-align: right;
}
.gathering_frame {
  text-align: center;
  font-weight: bold;
}
.gathering_flag {
  text-align: center;

}

table {
  border: 2px;
}
thead {
  background-color: yellowgreen;
  border-width: 4px;
  border-style: groove;
  border-color: black;
}
tbody {
  background-color: lightblue;
  border-width: 2px;
  border-style: solid;
  border-color: black;
}