body {
  background-color: white;
  color: black;
  font-family: Verdana;
  overflow: hidden;
}


.tlbar {
  width: 100%;
  height: 5vh;
  background-color: #EEEEEE;
}

.main {
  width: 100%;
  min-height: 90vh;
  display: table;
}

.main_r {
  display: table-row;
}

.main_c_l {
  width: 20%;
  padding: 5px;
  display: table-cell;
  background-color:#E0E0E0;
}

.main_c_m {
  width: 77.5%;
  overflow-y: auto;
  display: table-cell;
  background-color:#FFFFFF;
}

.main_c_r {
  display: table-cell;
  background-color:#EEEEEE;
}

.content {
  height: 90vh;
  width: 100%;
  overflow: scroll;
  padding: 5px;
}