.no_disp {
  display: none;
}
.login {
  margin: 16vw auto;
  text-align: center;
  max-width: 400px;
  border: 1px solid #e5e5e5;
  padding-top: 120px;
  padding-bottom: 120px;
}
.login .form-label {
  margin-top: 16px;
}
.login h2 {
  margin-bottom: 16px;
}
.login_error {
  margin-top: 8px;
  text-align: center;
  color: #f00;
}

.main {
  max-width: 800px;
  padding-bottom: 120px;
}

header {
  height: 64px;
  margin-top: 16px;
}
header h1 {
  float: left;
}
footer {
  margin-top: 120px;
}


#btn_submit {
  margin-top: 16px;
}

.note_area {
  margin-top: 32px;
}
.next {
  margin-top: 60px;
}
.red {
  color: #f00;
}
.answer, .answer:hover {
  text-decoration: none;
  border: 1px solid #0D6EFD;
  padding: 4px;
  border-radius: 0.375rem;
  line-height: 2;
  font-size: 0.9rem;
}
.exam {
  margin-right: 16px;
}
.exam_tbl th, .exam_tbl td {
  vertical-align: middle;
}