* { margin: 0; padding: 0; box-sizing: border-box; }
      body { font: 12px Helvetica, Arial; 
      }

 
.table_header:hover {
  cursor: pointer;
}

.table_header {
  text-decoration: underline;
  text-align: center;
  height: 50px;
  border: 2px solid black;
  background-color: #7e7e7e;
}


.tr_row:hover {
  cursor: pointer;
  background-color: #d3d3d3;
}
.whole_row {
  text-align: center;
  
}