#outerTable {
  border: 2px solid black;
  border-collapse: collapse;
}
td,
th {
  border: 2px solid black;
  padding: 6px;
  text-align: center;
}
#UET {
  border-bottom-width: 8px;
}
main {
  width: fit-content;
  margin: 0 auto;
}
.gray_bg_TH {
  background-color: #999999;
}