table {
  border-collapse: collapse;
  width: 100%;
}

table, th, td {
  border: 1px solid grey !important;
}

th {
  text-align: center !important;
  vertical-align: middle !important;
  background-color: lightgrey !important;
  padding: 5px !important;
  font-weight: normal !important;
}

td {
  text-align: left !important;
  padding: 5px !important;
  line-height: 1.5;
}

.teacher_message_page .one_section {
  margin-bottom: 40px !important;
}

.teacher_message_page .link_area {
  max-width: 360px;
  margin: 100px auto 0;
}